Module:Citation/CS1

require ('strict');

--[[--< F O R W A R D  D E C L A R A T I O N S >--

each of these counts against the Lua upvalue limit

]]

local validation;																-- functions in Module:Citation/CS1/Date_validation

local utilities;																-- functions in Module:Citation/CS1/Utilities local z = {};																	-- table of tables in Module:Citation/CS1/Utilities

local identifiers;																-- functions and tables in Module:Citation/CS1/Identifiers local metadata;																	-- functions in Module:Citation/CS1/COinS local cfg = {};																	-- table of configuration tables that are defined in Module:Citation/CS1/Configuration local whitelist = {};															-- table of tables listing valid template parameter names; defined in Module:Citation/CS1/Whitelist

--[[--< P A G E  S C O P E   V A R I A B L E S >---

declare variables here that have page-wide scope that are not brought in from other modules; that are created here and used here

]]

local added_deprecated_cat;														-- Boolean flag so that the category is added only once local added_vanc_errs;															-- Boolean flag so we only emit one Vancouver error / category local added_generic_name_errs;													-- Boolean flag so we only emit one generic name error / category and stop testing names once an error is encountered local added_numeric_name_errs;													-- Boolean flag so we only emit one numeric name error / category and stop testing names once an error is encountered local added_numeric_name_maint;													-- Boolean flag so we only emit one numeric name maint category and stop testing names once a category has been emitted local Frame;																	-- holds the module's frame table local is_preview_mode;															-- true when article is in preview mode; false when using 'Preview page with this template' (previewing the module) local is_sandbox;																-- true when using sandbox modules to render citation

--[[--< F I R S T _ S E T >

Locates and returns the first set value in a table of values where the order established in the table, left-to-right (or top-to-bottom), is the order in which the values are evaluated. Returns nil if none are set.

This version replaces the original 'for _, val in pairs do' and a similar version that used ipairs. With the pairs version the order of evaluation could not be guaranteed. With the ipairs version, a nil value would terminate the for-loop before it reached the actual end of the list.

]]

local function first_set (list, count) local i = 1; while i <= count do															-- loop through all items in list if utilities.is_set( list[i] ) then return list[i];														-- return the first set list member end i = i + 1;																-- point to next end end

--[[--< A D D _ V A N C _ E R R O R >

Adds a single Vancouver system error message to the template's output regardless of how many error actually exist. To prevent duplication, added_vanc_errs is nil until an error message is emitted.

added_vanc_errs is a Boolean declared in page scope variables above

]]

local function add_vanc_error (source, position) if added_vanc_errs then return end added_vanc_errs = true;														-- note that we've added this category utilities.set_message ('err_vancouver', {source, position}); end

--[[--< I S _ S C H E M E >

does this thing that purports to be a URI scheme seem to be a valid scheme? The scheme is checked to see if it is in agreement with http://tools.ietf.org/html/std66#section-3.1 which says: Scheme names consist of a sequence of characters beginning with a  letter and followed by any combination of letters, digits, plus ("+"), period ("."), or hyphen ("-").

returns true if it does, else false

]]

local function is_scheme (scheme) return scheme and scheme:match ('^%a[%a%d%+%.%-]*:');						-- true if scheme is set and matches the pattern end

--[=[-< I S _ D O M A I N _ N A M E >--

Does this thing that purports to be a domain name seem to be a valid domain name?

Syntax defined here: http://tools.ietf.org/html/rfc1034#section-3.5 BNF defined here: https://tools.ietf.org/html/rfc4234 Single character names are generally reserved; see https://tools.ietf.org/html/draft-ietf-dnsind-iana-dns-01#page-15; see also Single-letter second-level domain list of TLDs: https://www.iana.org/domains/root/db

RFC 952 (modified by RFC 1123) requires the first and last character of a hostname to be a letter or a digit. Between the first and last characters the name may use letters, digits, and the hyphen.

Also allowed are IPv4 addresses. IPv6 not supported

domain is expected to be stripped of any path so that the last character in the last character of the TLD. tld is two or more alpha characters. Any preceding '//' (from splitting a URL with a scheme) will be stripped here. Perhaps not necessary but retained in case it is necessary for IPv4 dot decimal.

There are several tests: the first character of the whole domain name including subdomains must be a letter or a digit internationalized domain name (ASCII characters with .xn-- ASCII Compatible Encoding (ACE) prefix xn-- in the TLD) see https://tools.ietf.org/html/rfc3490 single-letter/digit second-level domains in the .org, .cash, and .today TLDs q, x, and z SL domains in the .com TLD i and q SL domains in the .net TLD single-letter SL domains in the ccTLDs (where the ccTLD is two letters) two-character SL domains in gTLDs (where the gTLD is two or more letters) three-plus-character SL domains in gTLDs (where the gTLD is two or more letters) IPv4 dot-decimal address format; TLD not allowed

returns true if domain appears to be a proper name and TLD or IPv4 address, else false

]=]

local function is_domain_name (domain) if not domain then return false;															-- if not set, abandon end domain = domain:gsub ('^//', '');											-- strip '//' from domain name if present; done here so we only have to do it once if not domain:match ('^[%w]') then											-- first character must be letter or digit return false; end

if domain:match ('^%a+:') then												-- hack to detect things that look like s:Page:Title where Page: is namespace at Wikisource return false; end

local patterns = {															-- patterns that look like URLs '%f[%w][%w][%w%-]+[%w]%.%a%a+$',										-- three or more character hostname.hostname or hostname.tld '%f[%w][%w][%w%-]+[%w]%.xn%-%-[%w]+$',									-- internationalized domain name with ACE prefix '%f[%a][qxz]%.com$',													-- assigned one character .com hostname (x.com times out 2015-12-10) '%f[%a][iq]%.net$',														-- assigned one character .net hostname (q.net registered but not active 2015-12-10) '%f[%w][%w]%.%a%a$',													-- one character hostname and ccTLD (2 chars) '%f[%w][%w][%w]%.%a%a+$',												-- two character hostname and TLD '^%d%d?%d?%.%d%d?%d?%.%d%d?%d?%.%d%d?%d?',								-- IPv4 address }

for _, pattern in ipairs (patterns) do										-- loop through the patterns list if domain:match (pattern) then return true;														-- if a match then we think that this thing that purports to be a URL is a URL end end

for _, d in ipairs (cfg.single_letter_2nd_lvl_domains_t) do					-- look for single letter second level domain names for these top level domains if domain:match ('%f[%w][%w]%.' .. d) then return true end end return false;																-- no matches, we don't know what this thing is end

--[[--< I S _ U R L >--

returns true if the scheme and domain parts of a URL appear to be a valid URL; else false.

This function is the last step in the validation process. This function is separate because there are cases that are not covered by split_url, for example is_parameter_ext_wikilink which is looking for bracketted external wikilinks.

]]

local function is_url (scheme, domain) if utilities.is_set (scheme) then											-- if scheme is set check it and domain return is_scheme (scheme) and is_domain_name (domain); else return is_domain_name (domain);											-- scheme not set when URL is protocol-relative end end

--[[--< S P L I T _ U R L >

Split a URL into a scheme, authority indicator, and domain.

First remove Fully Qualified Domain Name terminator (a dot following TLD) (if any) and any path(/), query(?) or fragment(#).

If protocol-relative URL, return nil scheme and domain else return nil for both scheme and domain.

When not protocol-relative, get scheme, authority indicator, and domain. If there is an authority indicator (one or more '/' characters immediately following the scheme's colon), make sure that there are only 2.

Any URL that does not have news: scheme must have authority indicator (//). TODO: are there other common schemes like news: that don't use authority indicator?

Strip off any port and path;

]]

local function split_url (url_str) local scheme, authority, domain; url_str = url_str:gsub ('([%a%d])%.?[/%?#].*$', '%1');						-- strip FQDN terminator and path(/), query(?), fragment (#) (the capture prevents false replacement of '//')

if url_str:match ('^//%S*') then											-- if there is what appears to be a protocol-relative URL domain = url_str:match ('^//(%S*)') elseif url_str:match ('%S-:/*%S+') then										-- if there is what appears to be a scheme, optional authority indicator, and domain name scheme, authority, domain = url_str:match ('(%S-:)(/*)(%S+)');			-- extract the scheme, authority indicator, and domain portions if utilities.is_set (authority) then authority = authority:gsub ('//', '', 1);							-- replace place 1 pair of '/' with nothing; if utilities.is_set(authority) then									-- if anything left (1 or 3+ '/' where authority should be) then return scheme;													-- return scheme only making domain nil which will cause an error message end else if not scheme:match ('^news:') then									-- except for news:..., MediaWiki won't link URLs that do not have authority indicator; TODO: a better way to do this test? return scheme;													-- return scheme only making domain nil which will cause an error message end end domain = domain:gsub ('(%a):%d+', '%1');								-- strip port number if present end return scheme, domain; end

--[[--< L I N K _ P A R A M _ O K >---

checks the content of |title-link=, |series-link=, |author-link=, etc. for properly formatted content: no wikilinks, no URLs

Link parameters are to hold the title of a Wikipedia article, so none of the WP:TITLESPECIALCHARACTERS are allowed: # < > [ ] | { } _ except the underscore which is used as a space in wiki URLs and # which is used for section links

returns false when the value contains any of these characters.

When there are no illegal characters, this function returns TRUE if value DOES NOT appear to be a valid URL (the
 * -link= parameter is ok); else false when value appears to be a valid URL (the | -link= parameter is NOT ok).

]]

local function link_param_ok (value) local scheme, domain; if value:find ('[<>%[%]|{}]') then											-- if any prohibited characters return false; end

scheme, domain = split_url (value);											-- get scheme or nil and domain or nil from URL; return not is_url (scheme, domain);											-- return true if value DOES NOT appear to be a valid URL end

--[[--< L I N K _ T I T L E _ O K >---

Use link_param_ok to validate | -link= value and its matching | = value.

that condition exists
 * = may be wiki-linked but not when | -link= has a value. This function emits an error message when

check for inter-language interwiki-link prefix. prefix must be a MediaWiki-recognized language code and must begin with a colon.

]]

local function link_title_ok (link, lorig, title, torig) local orig; if utilities.is_set (link) then 											-- don't bother if -link doesn't have a value if not link_param_ok (link) then										-- check | -link= markup orig = lorig;														-- identify the failing link parameter elseif title:find ('%[%[') then											-- check |title= for wikilink markup orig = torig;														-- identify the failing |title= parameter elseif link:match ('^%a+:') then										-- if the link is what looks like an interwiki local prefix = link:match ('^(%a+):'):lower;						-- get the interwiki prefix

if cfg.inter_wiki_map[prefix] then									-- if prefix is in the map, must have preceding colon orig = lorig;													-- flag as error end end end

if utilities.is_set (orig) then link = '';																-- unset utilities.set_message ('err_bad_paramlink', orig);						-- URL or wikilink in |title= with |title-link=; end return link;																-- link if ok, empty string else end

--[[--< C H E C K _ U R L >

Determines whether a URL string appears to be valid.

First we test for space characters. If any are found, return false. Then split the URL into scheme and domain portions, or for protocol-relative (//example.com) URLs, just the domain. Use is_url to validate the two portions of the URL. If both are valid, or for protocol-relative if domain is valid, return true, else false.

Because it is different from a standard URL, and because this module used external_link to make external links that work for standard and news: links, we validate newsgroup names here. The specification for a newsgroup name is at https://tools.ietf.org/html/rfc5536#section-3.1.4

]]

local function check_url( url_str ) if nil == url_str:match ("^%S+$") then										-- if there are any spaces in |url=value it can't be a proper URL return false; end local scheme, domain;

scheme, domain = split_url (url_str);										-- get scheme or nil and domain or nil from URL; if 'news:' == scheme then													-- special case for newsgroups return domain:match('^[%a%d%+%-_]+%.[%a%d%+%-_%.]*[%a%d%+%-_]$'); end return is_url (scheme, domain);												-- return true if value appears to be a valid URL end

--[=[-< I S _ P A R A M E T E R _ E X T _ W I K I L I N K >

Return true if a parameter value has a string that begins and ends with square brackets [ and ] and the first non-space characters following the opening bracket appear to be a URL. The test will also find external wikilinks that use protocol-relative URLs. Also finds bare URLs.

The frontier pattern prevents a match on interwiki-links which are similar to scheme:path URLs. The tests that find bracketed URLs are required because the parameters that call this test (currently |title=, |chapter=, |work=, and |publisher=) may have wikilinks and there are articles or redirects like '//Hus' so, while uncommon, |title=//Hus is possible as might be //Hus.

]=]

local function is_parameter_ext_wikilink (value) local scheme, domain;

if value:match ('%f[%[]%[%a%S*:%S+.*%]') then								-- if ext. wikilink with scheme and domain: [xxxx://yyyyy.zzz] scheme, domain = split_url (value:match ('%f[%[]%[(%a%S*:%S+).*%]')); elseif value:match ('%f[%[]%[//%S+.*%]') then								-- if protocol-relative ext. wikilink: [//yyyyy.zzz] scheme, domain = split_url (value:match ('%f[%[]%[(//%S+).*%]')); elseif value:match ('%a%S*:%S+') then										-- if bare URL with scheme; may have leading or trailing plain text scheme, domain = split_url (value:match ('(%a%S*:%S+)')); elseif value:match ('//%S+') then											-- if protocol-relative bare URL: //yyyyy.zzz; may have leading or trailing plain text scheme, domain = split_url (value:match ('(//%S+)'));					-- what is left should be the domain else return false;															-- didn't find anything that is obviously a URL end

return is_url (scheme, domain);												-- return true if value appears to be a valid URL end

--[[-< C H E C K _ F O R _ U R L >-

loop through a list of parameters and their values. Look at the value and if it has an external link, emit an error message.

]]

local function check_for_url (parameter_list, error_list) for k, v in pairs (parameter_list) do										-- for each parameter in the list if is_parameter_ext_wikilink (v) then									-- look at the value; if there is a URL add an error message table.insert (error_list, utilities.wrap_style ('parameter', k)); end end end

--[[--< S A F E _ F O R _ U R L >--

Escape sequences for content that will be used for URL descriptions

]]

local function safe_for_url( str ) if str:match( "%[%[.-%]%]" ) ~= nil then utilities.set_message ('err_wikilink_in_url', {}); end return str:gsub( '[%[%]\n]', {			['['] = '&#91;',		[']'] = '&#93;',		['\n'] = ' ' } ); end

--[[--< E X T E R N A L _ L I N K >

Format an external link with error checking

]]

local function external_link (URL, label, source, access) local err_msg = ''; local domain; local path; local base_url;

if not utilities.is_set (label) then label = URL; if utilities.is_set (source) then utilities.set_message ('err_bare_url_missing_title', {utilities.wrap_style ('parameter', source)}); else error (cfg.messages["bare_url_no_origin"]);							-- programmer error; valid parameter name does not have matching meta-parameter end end if not check_url (URL) then utilities.set_message ('err_bad_url', {utilities.wrap_style ('parameter', source)}); end domain, path = URL:match ('^([/%.%-%+:%a%d]+)([/%?#].*)$');					-- split the URL into scheme plus domain and path if path then																-- if there is a path portion path = path:gsub ('[%[%]]', {['['] = '%5b', [']'] = '%5d'});			-- replace '[' and ']' with their percent-encoded values URL = table.concat ({domain, path});									-- and reassemble end

base_url = table.concat ({ "[", URL, " ", safe_for_url (label), "]" });		-- assemble a wiki-markup URL

if utilities.is_set (access) then											-- access level (subscription, registration, limited) base_url = utilities.substitute (cfg.presentation['ext-link-access-signal'], {cfg.presentation[access].class, cfg.presentation[access].title, base_url});	-- add the appropriate icon end

return base_url; end

--[[--< D E P R E C A T E D _ P A R A M E T E R >--

Categorize and emit an error message when the citation contains one or more deprecated parameters. The function includes the offending parameter name to the error message. Only one error message is emitted regardless of the number of deprecated parameters in the citation.

added_deprecated_cat is a Boolean declared in page scope variables above

]]

local function deprecated_parameter(name) if not added_deprecated_cat then added_deprecated_cat = true;											-- note that we've added this category utilities.set_message ('err_deprecated_params', {name});				-- add error message end end

--[=[-< K E R N _ Q U O T E S >

Apply kerning to open the space between the quote mark provided by the module and a leading or trailing quote mark contained in a |title= or |chapter= parameter's value.

This function will positive kern either single or double quotes: "'Unkerned title with leading and trailing single quote marks'" " 'Kerned title with leading and trailing single quote marks' " (in real life the kerning isn't as wide as this example) Double single quotes (italic or bold wiki-markup) are not kerned.

Replaces Unicode quote marks in plain text or in the label portion of a L|D style wikilink with typewriter quote marks regardless of the need for kerning. Unicode quote marks are not replaced in simple D wikilinks.

Call this function for chapter titles, for website titles, etc.; not for book titles.

]=]

local function kern_quotes (str) local cap = ''; local wl_type, label, link;

wl_type, label, link = utilities.is_wikilink (str);							-- wl_type is: 0, no wl (text in label variable); 1, D; 2, L|D if 1 == wl_type then														-- D simple wikilink with or without quote marks if mw.ustring.match (str, '%[%[[\"“”\'‘’].+[\"“”\'‘’]%]%]') then		-- leading and trailing quote marks			str = utilities.substitute (cfg.presentation['kern-left'], str);			str = utilities.substitute (cfg.presentation['kern-right'], str);		elseif mw.ustring.match (str, '%[%[[\"“”\'‘’].+%]%]')	then			-- leading quote marks			str = utilities.substitute (cfg.presentation['kern-left'], str);		elseif mw.ustring.match (str, '%[%[.+[\"“”\'‘’]%]%]') then				-- trailing quote marks			str = utilities.substitute (cfg.presentation['kern-right'], str);		end

else																		-- plain text or L|D; text in label variable label = mw.ustring.gsub (label, '[“”]', '\"');							-- replace “” (U+201C & U+201D) with " (typewriter double quote mark) label = mw.ustring.gsub (label, '[‘’]', '\'');							-- replace ‘’ (U+2018 & U+2019) with ' (typewriter single quote mark)

cap = mw.ustring.match (label, "^([\"\'][^\'].+)");						-- match leading double or single quote but not doubled single quotes (italic markup)		if utilities.is_set (cap) then			label = utilities.substitute (cfg.presentation['kern-left'], cap);		end		cap = mw.ustring.match (label, "^(.+[^\'][\"\'])$")						-- match trailing double or single quote but not doubled single quotes (italic markup) if utilities.is_set (cap) then label = utilities.substitute (cfg.presentation['kern-right'], cap); end if 2 == wl_type then str = utilities.make_wikilink (link, label);						-- reassemble the wikilink else str = label; end end return str; end

--[[--< F O R M A T _ S C R I P T _ V A L U E >

not be italicized and may be written right-to-left. The value supplied by |script-title= is concatenated onto Title after Title has been wrapped in italic markup.
 * script-title= holds title parameters that are not written in Latin-based scripts: Chinese, Japanese, Arabic, Hebrew, etc. These scripts should

Regardless of language, all values provided by |script-title= are wrapped in ... tags to isolate RTL languages from the English left to right.

|script-title=ja:*** *** (where * represents a Japanese character) Spaces between the two-character code and the colon and the colon and the first script character are allowed: |script-title=ja : *** *** |script-title=ja: *** *** |script-title=ja :*** *** Spaces preceding the prefix are allowed: |script-title = ja:*** ***
 * script-title= provides a unique feature. The value in |script-title= may be prefixed with a two-character ISO 639-1 language code and a colon:

The prefix is checked for validity. If it is a valid ISO 639-1 language code, the lang attribute (lang="ja") is added to the tag so that browsers can know the language the tag contains. This may help the browser render the script more correctly. If the prefix is invalid, the lang attribute is not added. At this time there is no error message for this condition.

Supports |script-title=, |script-chapter=, |script- =

]]

local function format_script_value (script_value, script_param) local lang='';																-- initialize to empty string local name; if script_value:match('^%l%l%l?%s*:') then									-- if first 3 or 4 non-space characters are script language prefix lang = script_value:match('^(%l%l%l?)%s*:%s*%S.*');						-- get the language prefix or nil if there is no script if not utilities.is_set (lang) then utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['missing title part']});		-- prefix without 'title'; add error message return '';															-- script_value was just the prefix so return empty string end -- if we get this far we have prefix and script name = cfg.lang_tag_remap[lang] or mw.language.fetchLanguageName( lang, cfg.this_wiki_code );	-- get language name so that we can use it to categorize if utilities.is_set (name) then											-- is prefix a proper ISO 639-1 language code? script_value = script_value:gsub ('^%l+%s*:%s*', '');				-- strip prefix from script -- is prefix one of these language codes? if utilities.in_array (lang, cfg.script_lang_codes) then utilities.add_prop_cat ('script', {name, lang}) else utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['unknown language code']});	-- unknown script-language; add error message end lang = ' lang="' .. lang .. '" ';									-- convert prefix into a lang attribute else utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['invalid language code']});		-- invalid language code; add error message lang = '';															-- invalid so set lang to empty string end else utilities.set_message ('err_script_parameter', {script_param, cfg.err_msg_supl['missing prefix']});				-- no language code prefix; add error message end script_value = utilities.substitute (cfg.presentation['bdi'], {lang, script_value});	-- isolate in case script is RTL

return script_value; end

--[[--< S C R I P T _ C O N C A T E N A T E >--

Initially for |title= and |script-title=, this function concatenates those two parameter values after the script value has been wrapped in tags.

]]

local function script_concatenate (title, script, script_param) if utilities.is_set (script) then script = format_script_value (script, script_param);					-- tags, lang attribute, categorization, etc.; returns empty string on error if utilities.is_set (script) then title = title .. ' ' .. script;										-- concatenate title and script title end end return title; end

--[[--< W R A P _ M S G >--

Applies additional message text to various parameter values. Supplied string is wrapped using a message_list configuration taking one argument. Supports lower case text for templates. Additional text taken from citation_config.messages - the reason this function is similar to but separate from wrap_style.

]]

local function wrap_msg (key, str, lower) if not utilities.is_set ( str ) then return ""; end if true == lower then local msg; msg = cfg.messages[key]:lower;										-- set the message to lower case before return utilities.substitute ( msg, str );								-- including template text else return utilities.substitute ( cfg.messages[key], str ); end end

--[[< W I K I S O U R C E _ U R L _ M A K E >---

Makes a Wikisource URL from Wikisource interwiki-link. Returns the URL and appropriate label; nil else.

str is the value assigned to |chapter= (or aliases) or |title= or |title-link=

]]

local function wikisource_url_make (str) local wl_type, D, L;	local ws_url, ws_label; local wikisource_prefix = table.concat ({'https://', cfg.this_wiki_code, '.wikisource.org/wiki/'});

wl_type, D, L = utilities.is_wikilink (str);								-- wl_type is 0 (not a wikilink), 1 (simple wikilink), 2 (complex wikilink)

if 0 == wl_type then														-- not a wikilink; might be from |title-link= str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace if utilities.is_set (str) then ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title				}); ws_label = str;														-- label for the URL end elseif 1 == wl_type then													-- simple wikilink: ws article str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace if utilities.is_set (str) then ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title				}); ws_label = str;														-- label for the URL end elseif 2 == wl_type then													-- non-so-simple wikilink: displayed text (L|D) str = L:match ('^[Ww]ikisource:(.+)') or L:match ('^[Ss]:(.+)');		-- article title from interwiki link with long-form or short-form namespace if utilities.is_set (str) then ws_label = D;														-- get ws article name from display portion of interwiki link ws_url = table.concat ({											-- build a Wikisource URL				wikisource_prefix,												-- prefix				str,															-- article title without namespace from link portion of wikilink				}); end end

if ws_url then ws_url = mw.uri.encode (ws_url, 'WIKI');								-- make a usable URL ws_url = ws_url:gsub ('%%23', '#');										-- undo percent-encoding of fragment marker end

return ws_url, ws_label, L or D;											-- return proper URL or nil and a label or nil end

--[[< F O R M A T _ P E R I O D I C A L >---

Format the three periodical parameters: |script- =, | =, and |trans- = into a single Periodical meta-parameter.

]]

local function format_periodical (script_periodical, script_periodical_source, periodical, trans_periodical)

if not utilities.is_set (periodical) then periodical = '';														-- to be safe for concatenation else periodical = utilities.wrap_style ('italic-title', periodical);			-- style end

periodical = script_concatenate (periodical, script_periodical, script_periodical_source);	-- tags, lang attribute, categorization, etc.; must be done after title is wrapped

if utilities.is_set (trans_periodical) then trans_periodical = utilities.wrap_style ('trans-italic-title', trans_periodical); if utilities.is_set (periodical) then periodical = periodical .. ' ' .. trans_periodical; else																	-- here when trans-periodical without periodical or script-periodical periodical = trans_periodical; utilities.set_message ('err_trans_missing_title', {'periodical'}); end end

return periodical; end

--[[--< F O R M A T _ C H A P T E R _ T I T L E >---

Format the four chapter parameters: |script-chapter=, |chapter=, |trans-chapter=, and |chapter-url= into a single chapter meta- parameter (chapter_url_source used for error messages).

]]

local function format_chapter_title (script_chapter, script_chapter_source, chapter, chapter_source, trans_chapter, trans_chapter_source, chapter_url, chapter_url_source, no_quotes, access) local ws_url, ws_label, L = wikisource_url_make (chapter);					-- make a wikisource URL and label from a wikisource interwiki link if ws_url then ws_label = ws_label:gsub ('_', ' ');									-- replace underscore separators with space characters chapter = ws_label; end

if not utilities.is_set (chapter) then chapter = '';															-- to be safe for concatenation else if false == no_quotes then chapter = kern_quotes (chapter);									-- if necessary, separate chapter title's leading and trailing quote marks from module provided quote marks chapter = utilities.wrap_style ('quoted-title', chapter); end end

chapter = script_concatenate (chapter, script_chapter, script_chapter_source);	-- tags, lang attribute, categorization, etc.; must be done after title is wrapped

if utilities.is_set (chapter_url) then chapter = external_link (chapter_url, chapter, chapter_url_source, access);	-- adds bare_url_missing_title error if appropriate elseif ws_url then chapter = external_link (ws_url, chapter .. ' ', 'ws link in chapter');	-- adds bare_url_missing_title error if appropriate; space char to move icon away from chap text; TODO: better way to do this? chapter = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, chapter}); end

if utilities.is_set (trans_chapter) then trans_chapter = utilities.wrap_style ('trans-quoted-title', trans_chapter); if utilities.is_set (chapter) then chapter = chapter .. ' ' .. trans_chapter; else																	-- here when trans_chapter without chapter or script-chapter chapter = trans_chapter; chapter_source = trans_chapter_source:match ('trans%-?(.+)');		-- when no chapter, get matching name from trans- utilities.set_message ('err_trans_missing_title', {chapter_source}); end end

return chapter; end

--[[< H A S _ I N V I S I B L E _ C H A R S >---

This function searches a parameter's value for non-printable or invisible characters. The search stops at the first match.

This function will detect the visible replacement character when it is part of the Wikisource.

Detects but ignores nowiki and math stripmarkers. Also detects other named stripmarkers (gallery, math, pre, ref) and identifies them with a slightly different error message. See also coins_cleanup.

Output of this function is an error message that identifies the character or the Unicode group, or the stripmarker that was detected along with its position (or, for multi-byte characters, the position of its first byte) in the parameter value.

]]

local function has_invisible_chars (param, v)	local position = '';														-- position of invisible char or starting position of stripmarker local capture;																-- used by stripmarker detection to hold name of the stripmarker local stripmarker;															-- boolean set true when a stripmarker is found

capture = string.match (v, '[%w%p ]*');										-- test for values that are simple ASCII text and bypass other tests if true if capture == v then														-- if same there are no Unicode characters return; end

for _, invisible_char in ipairs (cfg.invisible_chars) do		local char_name = invisible_char[1];									-- the character or group name local pattern = invisible_char[2];										-- the pattern used to find it		position, _, capture = mw.ustring.find (v, pattern);					-- see if the parameter value contains characters that match the pattern if position and (cfg.invisible_defs.zwj == capture) then				-- if we found a zero-width joiner character if mw.ustring.find (v, cfg.indic_script) then						-- it's ok if one of the Indic scripts position = nil;													-- unset position elseif cfg.emoji_t[mw.ustring.codepoint (v, position+1)] then			-- is zwj followed by a character listed in emoji{}? position = nil;													-- unset position end end if position then if 'nowiki' == capture or 'math' == capture or						-- nowiki and math stripmarkers (not an error condition) ('templatestyles' == capture and utilities.in_array (param, {'id', 'quote'})) then	-- templatestyles stripmarker allowed in these parameters stripmarker = true;											-- set a flag elseif true == stripmarker and cfg.invisible_defs.del == capture then	-- because stripmakers begin and end with the delete char, assume that we've found one end of a stripmarker position = nil;													-- unset else local err_msg; if capture and not (cfg.invisible_defs.del == capture or cfg.invisible_defs.zwj == capture) then err_msg = capture .. ' ' .. char_name; else err_msg = char_name .. ' ' .. 'character'; end

utilities.set_message ('err_invisible_char', {err_msg, utilities.wrap_style ('parameter', param), position});	-- add error message return;															-- and done with this parameter end end end end

--[[---< A R G U M E N T _ W R A P P E R >--

Argument wrapper. This function provides support for argument mapping defined in the configuration file so that multiple names can be transparently aliased to single internal variable.

]]

local function argument_wrapper ( args ) local origin = {}; return setmetatable({		ORIGIN = function ( self, k )			local dummy = self[k];												-- force the variable to be loaded.			return origin[k];		end	},	{		__index = function ( tbl, k )			if origin[k] ~= nil then				return nil;			end			local args, list, v = args, cfg.aliases[k];			if type( list ) == 'table' then				v, origin[k] = utilities.select_one ( args, list, 'err_redundant_parameters' );				if origin[k] == nil then					origin[k] = '';												-- Empty string, not nil				end			elseif list ~= nil then				v, origin[k] = args[list], list;			else				-- maybe let through instead of raising an error?				-- v, origin[k] = args[k], k;				error( cfg.messages['unknown_argument_map'] .. ': ' .. k);			end			-- Empty strings, not nil;			if v == nil then				v = ;				origin[k] = ;			end			tbl = rawset( tbl, k, v );			return v;		end,	}); end

--[[--< N O W R A P _ D A T E >-

When date is YYYY-MM-DD format wrap in nowrap span: YYYY-MM-DD. When date is DD MMMM YYYY or is MMMM DD, YYYY then wrap in nowrap span: DD MMMM YYYY or MMMM DD, YYYY

DOES NOT yet support MMMM YYYY or any of the date ranges.

]]

local function nowrap_date (date) local cap = ''; local cap2 = '';

if date:match("^%d%d%d%d%-%d%d%-%d%d$") then date = utilities.substitute (cfg.presentation['nowrap1'], date); elseif date:match("^%a+%s*%d%d?,%s+%d%d%d%d$") or date:match ("^%d%d?%s*%a+%s+%d%d%d%d$") then cap, cap2 = string.match (date, "^(.*)%s+(%d%d%d%d)$"); date = utilities.substitute (cfg.presentation['nowrap2'], {cap, cap2}); end return date; end

--[[--< S E T _ T I T L E T Y P E >-

This function sets default title types (equivalent to the citation including special case where it is desirable to omit the title type from the rendered citation (|type=none).
 * type= ) for those templates that have defaults. Also handles the

]]

local function set_titletype (cite_class, title_type) if utilities.is_set (title_type) then if 'none' == cfg.keywords_xlate[title_type] then title_type = '';													-- if |type=none then type parameter not displayed end return title_type;														-- if |type= has been set to any other value use that value end

return cfg.title_types [cite_class] or '';									-- set template's default title type; else empty string for concatenation end

--[[--< S A F E _ J O I N >-

Joins a sequence of strings together while checking for duplicate separation characters.

]]

local function safe_join( tbl, duplicate_char ) local f = {};																-- create a function table appropriate to type of 'duplicate character' if 1 == #duplicate_char then											-- for single byte ASCII characters use the string library functions f.gsub = string.gsub f.match = string.match f.sub = string.sub else																	-- for multi-byte characters use the ustring library functions f.gsub = mw.ustring.gsub f.match = mw.ustring.match f.sub = mw.ustring.sub end

local str = '';																-- the output string local comp = '';															-- what does 'comp' mean? local end_chr = ''; local trim; for _, value in ipairs( tbl ) do		if value == nil then value = ''; end if str == '' then														-- if output string is empty str = value;														-- assign value to it (first time through the loop) elseif value ~= '' then if value:sub(1, 1) == '<' then										-- special case of values enclosed in spans and other markup. comp = value:gsub( "%b<>", "" );								-- remove HTML markup ( string -> string) else comp = value; end -- typically duplicate_char is sepc if f.sub(comp, 1, 1) == duplicate_char then							-- is first character same as duplicate_char? why test first character? --  Because individual string segments often (always?) begin with terminal punct for the --  preceding segment: 'First element' .. 'sepc next element' .. etc.? trim = false; end_chr = f.sub(str, -1, -1);									-- get the last character of the output string -- str = str .. "<HERE(enchr=" .. end_chr .. ")"				-- debug stuff? if end_chr == duplicate_char then								-- if same as separator str = f.sub(str, 1, -2);									-- remove it				elseif end_chr == "'" then										-- if it might be wiki-markup if f.sub(str, -3, -1) == duplicate_char .. "" then		-- if last three chars of str are sepc str = f.sub(str, 1, -4) .. "";						-- remove them and add back  elseif f.sub(str, -5, -1) == duplicate_char .. "]]" then	-- if last five chars of str are sepc]] trim = true;											-- why? why do this and next differently from previous? elseif f.sub(str, -4, -1) == duplicate_char .. "]" then	-- if last four chars of str are sepc] trim = true;											-- same question end elseif end_chr == "]" then										-- if it might be wiki-markup if f.sub(str, -3, -1) == duplicate_char .. "]]" then		-- if last three chars of str are sepc]] wikilink trim = true; elseif f.sub(str, -3, -1) == duplicate_char .. '"]' then	-- if last three chars of str are sepc"] quoted external link trim = true; elseif f.sub(str, -2, -1) == duplicate_char .. "]" then	-- if last two chars of str are sepc] external link trim = true; elseif f.sub(str, -4, -1) == duplicate_char .. "'']" then	-- normal case when |url=something & |title=Title. trim = true; end elseif end_chr == " " then										-- if last char of output string is a space if f.sub(str, -2, -1) == duplicate_char .. " " then			-- if last two chars of str are str = f.sub(str, 1, -3);								-- remove them both end end

if trim then if value ~= comp then 										-- value does not equal comp when value contains HTML markup local dup2 = duplicate_char; if f.match(dup2, "%A" ) then dup2 = "%" .. dup2; end	-- if duplicate_char not a letter then escape it value = f.gsub(value, "(%b<>)" .. dup2, "%1", 1 )		-- remove duplicate_char if it follows HTML markup else value = f.sub(value, 2, -1 );							-- remove duplicate_char when it is first character end end end str = str .. value; 												-- add it to the output string end end return str; end

--[[--< I S _ S U F F I X >-

returns true if suffix is properly formed Jr, Sr, or ordinal in the range 1–9. Puncutation not allowed.

]]

local function is_suffix (suffix) if utilities.in_array (suffix, {'Jr', 'Sr', 'Jnr', 'Snr', '1st', '2nd', '3rd'}) or suffix:match ('^%dth$') then return true; end return false; end

--[[< I S _ G O O D _ V A N C _ N A M E >---

For Vancouver style, author/editor names are supposed to be rendered in Latin (read ASCII) characters. When a name uses characters that contain diacritical marks, those characters are to be converted to the corresponding Latin character. When a name is written using a non-Latin alphabet or logogram, that name is to be transliterated into Latin characters. The module doesn't do this so editors may/must.

This test allows |first= and |last= names to contain any of the letters defined in the four Unicode Latin character sets C0 Controls and Basic Latin 0041–005A, 0061–007A C1 Controls and Latin-1 Supplement 00C0–00D6, 00D8–00F6, 00F8–00FF Latin Extended-A 0100–017F Latin Extended-B 0180–01BF, 01C4–024F

(http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/)
 * lastn= also allowed to contain hyphens, spaces, and apostrophes.
 * firstn= also allowed to contain hyphens, spaces, apostrophes, and periods

This original test: if nil == mw.ustring.find (last, "^[A-Za-zÀ-ÖØ-öø-ƿǄ-ɏ%-%s%']*$") or nil == mw.ustring.find (first, "^[A-Za-zÀ-ÖØ-öø-ƿǄ-ɏ%-%s%'%.]+[2-6%a]*$") then was written outside of the code editor and pasted here because the code editor gets confused between character insertion point and cursor position. The test has been rewritten to use decimal character escape sequence for the individual bytes of the Unicode characters so that it is not necessary to use an external editor to maintain this code.

\195\128-\195\150 – À-Ö (U+00C0–U+00D6 – C0 controls) \195\152-\195\182 – Ø-ö (U+00D8-U+00F6 – C0 controls) \195\184-\198\191 – ø-ƿ (U+00F8-U+01BF – C0 controls, Latin extended A & B)	\199\132-\201\143 – Ǆ-ɏ (U+01C4-U+024F – Latin extended B)

]]

local function is_good_vanc_name (last, first, suffix, position) if not suffix then if first:find ('[,%s]') then											-- when there is a space or comma, might be first name/initials + generational suffix first = first:match ('(.-)[,%s]+');									-- get name/initials suffix = first:match ('[,%s]+(.+)$');								-- get generational suffix end end if utilities.is_set (suffix) then if not is_suffix (suffix) then add_vanc_error (cfg.err_msg_supl.suffix, position); return false;														-- not a name with an appropriate suffix end end if nil == mw.ustring.find (last, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143\225\184\128-\225\187\191%-%s%']*$") or		nil == mw.ustring.find (first, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143\225\184\128-\225\187\191%-%s%'%.]*$") then add_vanc_error (cfg.err_msg_supl['non-Latin char'], position); return false;														-- not a string of Latin characters; Vancouver requires Romanization end; return true; end

--[[--< R E D U C E _ T O _ I N I T I A L S >--

Attempts to convert names to initials in support of |name-list-style=vanc.

Names in |firstn= may be separated by spaces or hyphens, or for initials, a period. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35062/.

Vancouver style requires family rank designations (Jr, II, III, etc.) to be rendered as Jr, 2nd, 3rd, etc. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35085/. This code only accepts and understands generational suffix in the Vancouver format because Roman numerals look like, and can be mistaken for, initials.

This function uses ustring functions because firstname initials may be any of the Unicode Latin characters accepted by is_good_vanc_name.

]]

local function reduce_to_initials (first, position) if first:find (',', 1, true) then return first;															-- commas not allowed; abandon end

local name, suffix = mw.ustring.match (first, "^(%u+) ([%dJS][%drndth]+)$");

if not name then															-- if not initials and a suffix name = mw.ustring.match (first, "^(%u+)$");								-- is it just initials? end

if name then																-- if first is initials with or without suffix if 3 > mw.ustring.len (name) then										-- if one or two initials if suffix then														-- if there is a suffix if is_suffix (suffix) then										-- is it legitimate? return first;												-- one or two initials and a valid suffix so nothing to do				else add_vanc_error (cfg.err_msg_supl.suffix, position);			-- one or two initials with invalid suffix so error message return first;												-- and return first unmolested end else return first;													-- one or two initials without suffix; nothing to do			end end end																			-- if here then name has 3 or more uppercase letters so treat them as a word

local initials_t, names_t = {}, {};											-- tables to hold name parts and initials local i = 1;																-- counter for number of initials

names_t = mw.text.split (first, '[%s%-]+');									-- split into a sequence of names and possible suffix

while names_t[i] do															-- loop through the sequence if 1 < i and names_t[i]:match ('[%dJS][%drndth]+%.?$') then				-- if not the first name, and looks like a suffix (may have trailing dot) names_t[i] = names_t[i]:gsub ('%.', '');							-- remove terminal dot if present if is_suffix (names_t[i]) then										-- if a legitimate suffix table.insert (initials_t, ' ' .. names_t[i]);					-- add a separator space, insert at end of initials sequence break;															-- and done because suffix must fall at the end of a name end																	-- no error message if not a suffix; possibly because of Romanization end if 3 > i then table.insert (initials_t, mw.ustring.sub (names_t[i], 1, 1));		-- insert the initial at end of initials sequence end i = i + 1;																-- bump the counter end return table.concat (initials_t);											-- Vancouver format does not include spaces. end

--[[--< I N T E R W I K I _ P R E F I X E N _ G E T >--

extract interwiki prefixen from. Returns two one or two values: false – no prefixen nil – prefix exists but not recognized project prefix, language prefix – when value has either of: : : : 		: : : 	project prefix, nil – when has only a known single-letter prefix nil, language prefix – when has only a known language prefix

accepts single-letter project prefixen: 'd' (wikidata), 's' (wikisource), and 'w' (wikipedia) prefixes; at this writing, the other single-letter prefixen (b (wikibook), c (commons), m (meta), n (wikinews), q (wikiquote), and v (wikiversity)) are not supported.

]]

local function interwiki_prefixen_get (value, is_link) if not value:find (':%l+:') then											-- if no prefix return false;															-- abandon; boolean here to distinguish from nil fail returns later end

local prefix_patterns_linked_t = {											-- sequence of valid interwiki and inter project prefixen '^%[%[:([dsw]):(%l%l+):',												-- wikilinked; project and language prefixes '^%[%[:(%l%l+):([dsw]):',												-- wikilinked; language and project prefixes '^%[%[:([dsw]):',														-- wikilinked; project prefix '^%[%[:(%l%l+):',														-- wikilinked; language prefix }	local prefix_patterns_unlinked_t = {										-- sequence of valid interwiki and inter project prefixen '^:([dsw]):(%l%l+):',													-- project and language prefixes '^:(%l%l+):([dsw]):',													-- language and project prefixes '^:([dsw]):',															-- project prefix '^:(%l%l+):',															-- language prefix }	local cap1, cap2; for _, pattern in ipairs ((is_link and prefix_patterns_linked_t) or prefix_patterns_unlinked_t) do		cap1, cap2 = value:match (pattern); if cap1 then break;																-- found a match so stop looking end end if cap1 and cap2 then														-- when both then :project:language: or :language:project: (both forms allowed) if 1 == #cap1 then														-- length == 1 then :project:language: if cfg.inter_wiki_map[cap2] then									-- is language prefix in the interwiki map? return cap1, cap2;												-- return interwiki project and interwiki language end else																	-- here when :language:project: if cfg.inter_wiki_map[cap1] then									-- is language prefix in the interwiki map? return cap2, cap1;												-- return interwiki project and interwiki language end end return nil;																-- unknown interwiki language elseif not (cap1 or cap2) then												-- both are nil? return nil;																-- we got something that looks like a project prefix but isn't; return fail elseif 1 == #cap1 then														-- here when one capture return cap1, nil;														-- length is 1 so return project, nil language else																		-- here when one capture and its length it more than 1 if cfg.inter_wiki_map[cap1] then										-- is language prefix in the interwiki map? return nil, cap1;													-- return nil project, language end end end

--[[--< L I S T _ P E O P L E >--

Formats a list of people (authors, contributors, editors, interviewers, translators)

names in the list will be linked when | -link= has a value | -mask- does NOT have a value; masked names are presumed to have been rendered previously so should have been linked there

when | -mask=0, the associated name is not rendered

]]

local function list_people (control, people, etal) local sep; local namesep; local format = control.format; local maximum = control.maximum; local name_list = {};

if 'vanc' == format then													-- Vancouver-like name styling? sep = cfg.presentation['sep_nl_vanc'];									-- name-list separator between names is a comma namesep = cfg.presentation['sep_name_vanc'];							-- last/first separator is a space else sep = cfg.presentation['sep_nl'];										-- name-list separator between names is a semicolon namesep = cfg.presentation['sep_name'];									-- last/first separator is 	end if sep:sub (-1, -1) ~= " " then sep = sep .. " " end if utilities.is_set (maximum) and maximum < 1 then return "", 0; end		-- returned 0 is for EditorCount; not used for other names for i, person in ipairs (people) do		if utilities.is_set (person.last) then local mask = person.mask; local one; local sep_one = sep;

if utilities.is_set (maximum) and i > maximum then etal = true; break; end if mask then local n = tonumber (mask);										-- convert to a number if it can be converted; nil else if n then one = 0 ~= n and string.rep("&mdash;", n) or nil;			-- make a string of (n > 0) mdashes, nil else, to replace name person.link = nil;											-- don't create link to name if name is replaces with mdash string or has been set nil else one = mask;													-- replace name with mask text (must include name-list separator) sep_one = " ";												-- modify name-list separator end else one = person.last;												-- get surname local first = person.first										-- get given name if utilities.is_set (first) then if ("vanc" == format) then									-- if Vancouver format one = one:gsub ('%.', '');								-- remove periods from surnames (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/) if not person.corporate and is_good_vanc_name (one, first, nil, i) then		-- and name is all Latin characters; corporate authors not tested first = reduce_to_initials (first, i);				-- attempt to convert first name(s) to initials end end one = one .. namesep .. first; end end if utilities.is_set (person.link) then one = utilities.make_wikilink (person.link, one);				-- link author/editor end

if one then															-- if has a value (name, mdash replacement, or mask text replacement) local proj, tag = interwiki_prefixen_get (one, true);			-- get the interwiki prefixen if present

if 'w' == proj and ('Wikipedia' == mw.site.namespaces.Project['name']) then proj = nil;													-- for stuff like :w:de:, :w is unnecessary TODO: maint cat? end if proj then proj = ({['d'] = 'Wikidata', ['s'] = 'Wikisource', ['w'] = 'Wikipedia'})[proj];	-- :w (wikipedia) for linking from a non-wikipedia project if proj then one = one .. utilities.wrap_style ('interproj', proj);	-- add resized leading space, brackets, static text, language name tag = nil;												-- unset; don't do both project and language end end if tag == cfg.this_wiki_code then tag = nil;													-- stuff like :en: at en.wiki is pointless TODO: maint cat? end if tag then local lang = cfg.lang_tag_remap[tag] or cfg.mw_languages_by_tag_t[tag]; if lang then												-- error messaging done in extract_names where we know parameter names one = one .. utilities.wrap_style ('interwiki', lang);	-- add resized leading space, brackets, static text, language name end end

table.insert (name_list, one);									-- add it to the list of names table.insert (name_list, sep_one);								-- add the proper name-list separator end end end

local count = #name_list / 2;												-- (number of names + number of separators) divided by 2 if 0 < count then if 1 < count and not etal then if 'amp' == format then name_list[#name_list-2] = " & ";								-- replace last separator with ampersand text elseif 'and' == format then if 2 == count then name_list[#name_list-2] = cfg.presentation.sep_nl_and;		-- replace last separator with 'and' text else name_list[#name_list-2] = cfg.presentation.sep_nl_end;		-- replace last separator with '(sep) and' text end end end name_list[#name_list] = nil;											-- erase the last separator end

local result = table.concat (name_list);									-- construct list if etal and utilities.is_set (result) then									-- etal may be set by |display-authors=etal but we might not have a last-first list result = result .. sep .. cfg.messages['et al'];						-- we've got a last-first list and etal so add et al.	end return result, count;														-- return name-list string and count of number of names (count used for editor names only) end

--[[< M A K E _ C I T E R E F _ I D >---

Generates a CITEREF anchor ID if we have at least one name or a date. Otherwise returns an empty string.

namelist is one of the contributor-, author-, or editor-name lists chosen in that order. year is Year or anchor_year.

]]

local function make_citeref_id (namelist, year) local names={};							-- a table for the one to four names and year for i,v in ipairs (namelist) do			-- loop through the list and take up to the first four last names names[i] = v.last if i == 4 then break end			-- if four then done end table.insert (names, year);				-- add the year at the end local id = table.concat(names);			-- concatenate names and year for CITEREF id	if utilities.is_set (id) then			-- if concatenation is not an empty string return "CITEREF" .. id;				-- add the CITEREF portion else return '';							-- return an empty string; no reason to include CITEREF id in this citation end end

--[[--< C I T E _ C L A S S _A T T R I B U T E _M A K E >--

construct tag class attribute for this citation.

 – config.CitationClass from calling template – value from |mode= parameter

]]

local function cite_class_attribute_make (cite_class, mode) local class_t = {}; table.insert (class_t, 'citation');											-- required for blue highlight if 'citation' ~= cite_class then table.insert (class_t, cite_class);										-- identify this template for user css table.insert (class_t, utilities.is_set (mode) and mode or 'cs1');		-- identify the citation style for user css or javascript else table.insert (class_t, utilities.is_set (mode) and mode or 'cs2');		-- identify the citation style for user css or javascript end for _, prop_key in ipairs (z.prop_keys_t) do		table.insert (class_t, prop_key);										-- identify various properties for user css or javascript end

return table.concat (class_t, ' ');											-- make a big string and done end

--[[-< N A M E _ H A S _ E T A L >--

Evaluates the content of name parameters (author, editor, etc.) for variations on the theme of et al. If found, the et al. is removed, a flag is set to true and the function returns the modified name and the flag.

This function never sets the flag to false but returns its previous state because it may have been set by previous passes through this function or by the associated
 * display- =etal parameter

]]

local function name_has_etal (name, etal, nocat, param)

if utilities.is_set (name) then												-- name can be nil in which case just return local patterns = cfg.et_al_patterns; 									-- get patterns from configuration for _, pattern in ipairs (patterns) do									-- loop through all of the patterns if name:match (pattern) then										-- if this 'et al' pattern is found in name name = name:gsub (pattern, '');									-- remove the offending text etal = true;													-- set flag (may have been set previously here or by |display- =etal) if not nocat then												-- no categorization for |vauthors= utilities.set_message ('err_etal', {param});				-- and set an error if not added end end end end

return name, etal; end

--[[-< N A M E _ I S _ N U M E R I C >--

Add an error message and category when parameter value does not contain letters.

Add a maintenance category when parameter value has numeric characters mixed with characters that are not numeric characters; could be letters and/or punctuation characters.

This function will only emit one error and one maint message for the current template. Does not emit both error and maint messages/categories for the same parameter value.

returns nothing

]]

local function name_is_numeric (name, name_alias, list_name) local patterns = { '^%D+%d',																-- must have digits preceded by other characters '^%D*%d+%D+',															-- must have digits followed by other characters }

if not added_numeric_name_errs and mw.ustring.match (name, '^[%A]+$') then	-- if we have not already set an error message and does not have any alpha characters utilities.set_message ('err_numeric_names', name_alias);				-- add an error message added_numeric_name_errs = true;											-- set the flag so we emit only one error message return;																	-- when here no point in further testing; abandon end

if not added_numeric_name_maint then										-- if we have already set a maint message for _, pattern in ipairs (patterns) do									-- spin through list of patterns if mw.ustring.match (name, pattern) then							-- digits preceded or followed by anything but digits; %D+ includes punctuation utilities.set_message ('maint_numeric_names', cfg.special_case_translation [list_name]);	-- add a maint cat for this template added_numeric_name_maint = true;								-- set the flag so we emit only one maint message return;															-- when here no point in further testing; abandon end end end end

--[[-< N A M E _ H A S _ M U L T _ N A M E S >--

Evaluates the content of last/surname (authors etc.) parameters for multiple names. Multiple names are indicated if there is more than one comma or any "unescaped" semicolons. Escaped semicolons are ones used as part of selected HTML entities. If the condition is met, the function adds the multiple name maintenance category.

Same test for first except that commas should not appear in given names (MOS:JR says that the generational suffix does not take a separator character). Titles, degrees, postnominals, affiliations, all normally comma separated don't belong in a citation.

– name parameter value  – AuthorList, EditorList, etc – number of allowed commas; 1 (default) for surnames; 0 for given names

returns nothing

]]

local function name_has_mult_names (name, list_name, limit) local _, commas, semicolons, nbsps; limit = limit and limit or 1; if utilities.is_set (name) then _, commas = name:gsub (',', '');										-- count the number of commas _, semicolons = name:gsub (';', '');									-- count the number of semicolons -- nbsps probably should be its own separate count rather than merged in		-- some way with semicolons because Lua patterns do not support the -- grouping operator that regex does, which means there is no way to add -- more entities to escape except by adding more counts with the new -- entities _, nbsps = name:gsub (' ','');										-- count nbsps -- There is exactly 1 semicolon per  entity, so subtract nbsps -- from semicolons to 'escape' them. If additional entities are added, -- they also can be subtracted. if limit < commas or 0 < (semicolons - nbsps) then utilities.set_message ('maint_mult_names', cfg.special_case_translation [list_name]);	-- add a maint message end end end

--[=[-< I S _ G E N E R I C >--

Compares values assigned to various parameters according to the string provided as in the function call. can have on of two values: 'generic_names' – for name-holding parameters: |last=, |first=, |editor-last=, etc 'generic_titles' – for |title=

There are two types of generic tests. The 'accept' tests look for a pattern that should not be rejected by the 'reject' test. For example, |author=Smith, John would be rejected by the 'author' reject test. But piped wikilinks with 'author' disambiguation should not be rejected so the 'accept' test prevents that from happening. Accept tests are always performed before reject tests.

Each of the 'accept' and 'reject' sequence tables hold tables for en.wiki (['en']) and local.wiki (['local']) that each can hold a test sequence table The sequence table holds, at index [1], a test pattern, and, at index [2], a boolean control value. The control value tells string.find or mw.ustring.find to do plain-text search (true) or a pattern search (false). The intent of all this complexity is to make these searches as fast as possible so that we don't run out of processing time on very large articles.

Returns true when a reject test finds the pattern or string false when an accept test finds the pattern or string nil else

]=]

local function is_generic (item, value, wiki) local test_val; local str_lower = {															-- use string.lower for en.wiki (['en']) and use mw.ustring.lower or local.wiki (['local']) ['en'] = string.lower, ['local'] = mw.ustring.lower, }	local str_find = {															-- use string.find for en.wiki (['en']) and use mw.ustring.find or local.wiki (['local']) ['en'] = string.find, ['local'] = mw.ustring.find, }

local function test (val, test_t, wiki)										-- local function to do the testing; selects lower and find functions val = test_t[2] and str_lower[wiki](value) or val;						-- when  set to 'true', plaintext search using lowercase value return str_find[wiki] (val, test_t[1], 1, test_t[2]);					-- return nil when not found or matched end local test_types_t = {'accept', 'reject'};									-- test accept patterns first, then reject patterns local wikis_t = {'en', 'local'};											-- do tests for each of these keys; en.wiki first, local.wiki second

for _, test_type in ipairs (test_types_t) do								-- for each test type for _, generic_value in pairs (cfg.special_case_translation[item][test_type]) do	-- spin through the list of generic value fragments to accept or reject for _, wiki in ipairs (wikis_t) do				if generic_value[wiki] then if test (value, generic_value[wiki], wiki) then				-- go do the test return ('reject' == test_type);							-- param value rejected, return true; false else end end end end end end

--[[--< N A M E _ I S _ G E N E R I C >

calls is_generic to determine if is a 'generic name' listed in cfg.generic_names;  is the parameter name used in error messaging

]]

local function name_is_generic (name, name_alias) if not added_generic_name_errs and is_generic ('generic_names', name) then utilities.set_message ('err_generic_name', name_alias);					-- set an error message added_generic_name_errs = true; end end

--[[--< N A M E _ C H E C K S >

This function calls various name checking functions used to validate the content of the various name-holding parameters.

]]

local function name_checks (last, first, list_name, last_alias, first_alias) local accept_name;

if utilities.is_set (last) then last, accept_name = utilities.has_accept_as_written (last);				-- remove accept-this-as-written markup when it wraps all of

if not accept_name then													-- not wrapped in accept-as-written markup name_has_mult_names (last, list_name);								-- check for multiple names in the parameter name_is_numeric (last, last_alias, list_name);						-- check for names that have no letters or are a mix of digits and other characters name_is_generic (last, last_alias);									-- check for names found in the generic names list end end

if utilities.is_set (first) then first, accept_name = utilities.has_accept_as_written (first);			-- remove accept-this-as-written markup when it wraps all of

if not accept_name then													-- not wrapped in accept-as-written markup name_has_mult_names (first, list_name, 0);							-- check for multiple names in the parameter; 0 is number of allowed commas in a given name name_is_numeric (first, first_alias, list_name);					-- check for names that have no letters or are a mix of digits and other characters name_is_generic (first, first_alias);								-- check for names found in the generic names list end local wl_type, D = utilities.is_wikilink (first); if 0 ~= wl_type then first = D;			utilities.set_message ('err_bad_paramlink', first_alias); end end

return last, first;															-- done end

--[[--< E X T R A C T _ N A M E S >-

Gets name list from the input arguments

Searches through args in sequential order to find |lastn= and |firstn= parameters (or their aliases), and their matching link and mask parameters. Stops searching when both |lastn= and |firstn= are not found in args after two sequential attempts: found |last1=, |last2=, and |last3= but doesn't find |last4= and |last5= then the search is done.

This function emits an error message when there is a |firstn= without a matching are present but |last2= is missing, an error message is emitted. |lastn= is not required to have a matching |firstn=.
 * lastn=. When there are 'holes' in the list of last names, |last1= and |last3=

When an author or editor parameter contains some form of 'et al.', the 'et al.' is stripped from the parameter and a flag (etal) returned that will cause list_people to add the static 'et al.' text from Module:Citation/CS1/Configuration. This keeps 'et al.' out of the template's metadata. When this occurs, an error is emitted.

]]

local function extract_names(args, list_name) local names = {};															-- table of names local last;																	-- individual name components local first; local link; local mask; local i = 1;																-- loop counter/indexer local n = 1;																-- output table indexer local count = 0;															-- used to count the number of times we haven't found a |last= (or alias for authors, |editor-last or alias for editors) local etal = false;															-- return value set to true when we find some form of et al. in an author parameter

local last_alias, first_alias, link_alias;									-- selected parameter aliases used in error messaging while true do last, last_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'err_redundant_parameters', i );		-- search through args for name components beginning at 1 first, first_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'err_redundant_parameters', i ); link, link_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i ); mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i ); if last then															-- error check |lastn= alias for unknown interwiki link prefix; done here because this is where we have the parameter name local project, language = interwiki_prefixen_get (last, true);		-- true because we expect interwiki links in |lastn= to be wikilinked if nil == project and nil == language then							-- when both are nil utilities.set_message ('err_bad_paramlink', last_alias);		-- not known, emit an error message	-- TODO: err_bad_interwiki? last = utilities.remove_wiki_link (last);						-- remove wikilink markup; show display value only end end if link then															-- error check |linkn= alias for unknown interwiki link prefix local project, language = interwiki_prefixen_get (link, false);		-- false because wiki links in |author-linkn= is an error if nil == project and nil == language then							-- when both are nil utilities.set_message ('err_bad_paramlink', link_alias);		-- not known, emit an error message	-- TODO: err_bad_interwiki? link = nil;														-- unset so we don't link link_alias = nil; end end last, etal = name_has_etal (last, etal, false, last_alias);				-- find and remove variations on et al. first, etal = name_has_etal (first, etal, false, first_alias);			-- find and remove variations on et al. last, first = name_checks (last, first, list_name, last_alias, first_alias);						-- multiple names, extraneous annotation, etc. checks

if first and not last then												-- if there is a firstn without a matching lastn local alias = first_alias:find ('given', 1, true) and 'given' or 'first';	-- get first or given form of the alias utilities.set_message ('err_first_missing_last', {				first_alias,													-- param name of alias missing its mate				first_alias:gsub (alias, {['first'] = 'last', ['given'] = 'surname'}),	-- make param name appropriate to the alias form				});																-- add this error message elseif not first and not last then										-- if both firstn and lastn aren't found, are we done? count = count + 1;													-- number of times we haven't found last and first if 2 <= count then													-- two missing names and we give up				break;															-- normal exit or there is a two-name hole in the list; can't tell which end else																	-- we have last with or without a first local result; link = link_title_ok (link, link_alias, last, last_alias);			-- check for improper wiki-markup

if first then link = link_title_ok (link, link_alias, first, first_alias);	-- check for improper wiki-markup end

names[n] = {last = last, first = first, link = link, mask = mask, corporate = false};	-- add this name to our names list (corporate for |vauthors= only) n = n + 1;															-- point to next location in the names table if 1 == count then													-- if the previous name was missing utilities.set_message ('err_missing_name', {list_name:match ("(%w+)List"):lower, i - 1});	-- add this error message end count = 0;															-- reset the counter, we're looking for two consecutive missing names end i = i + 1;																-- point to next args location end return names, etal;															-- all done, return our list of names and the etal flag end

--[[--< N A M E _ T A G _ G E T >--

attempt to decode |language= and return language name and matching tag; nil else.

This function looks for:  as a tag in cfg.lang_tag_remap{}  as a name in cfg.lang_name_remap{}  as a name in cfg.mw_languages_by_name_t  as a tag in cfg.mw_languages_by_tag_t when those fail, presume that  is an IETF-like tag that MediaWiki does not recognize. Strip all script, region, variant, whatever subtags from  to leave just a two or three character language tag and look for the new  in cfg.mw_languages_by_tag_t{}

on success, returns name (in properly capitalized form) and matching tag (in lowercase); on failure returns nil

]]

local function name_tag_get (lang_param) local lang_param_lc = mw.ustring.lower (lang_param);						-- use lowercase as an index into the various tables local name; local tag;

name = cfg.lang_tag_remap[lang_param_lc];									-- assume  is a tag; attempt to get remapped language name if name then																-- when,  is a tag for a remapped language name if cfg.lang_name_remap[name:lower][2] ~= lang_param_lc then utilities.set_message ('maint_unknown_lang');						-- add maint category if not already added return name, cfg.lang_name_remap[name:lower][2];					-- so return name and tag from lang_name_remap[name]; special case to xlate sr-ec and sr-el to sr-cyrl and sr-latn end return name, lang_param_lc;												-- so return from remap and  end

tag = lang_param_lc:match ('^(%a%a%a?)%-.*');								-- still assuming that  is a tag; strip script, region, variant subtags name = cfg.lang_tag_remap[tag];												-- attempt to get remapped language name with language subtag only if name then																-- when, is a tag for a remapped language name return name, tag;														-- so return from remap and end

if cfg.lang_name_remap[lang_param_lc] then									-- not a remapped tag, assume <lang_param_lc> is a name; attempt to get remapped language tag return cfg.lang_name_remap[lang_param_lc][1], cfg.lang_name_remap[lang_param_lc][2];	-- for this <lang_param_lc>, return a (possibly) new name and appropriate tag end

name = cfg.mw_languages_by_tag_t[lang_param_lc];							-- assume that <lang_param_lc> is a tag; attempt to get its matching language name if name then return name, lang_param_lc;												-- <lang_param_lc> is a tag so return it and end tag = cfg.mw_languages_by_name_t[lang_param_lc];							-- assume that <lang_param_lc> is a language name; attempt to get its matching tag if tag then return cfg.mw_languages_by_tag_t[tag], tag;								-- <lang_param_lc> is a name so return the name from the table and end

tag = lang_param_lc:match ('^(%a%a%a?)%-.*');								-- is <lang_param_lc> an IETF-like tag that MediaWiki doesn't recognize? gets the language subtag; nil else

if tag then name = cfg.mw_languages_by_tag_t[tag];									-- attempt to get a language name using the shortened if name then return name, tag;													-- <lang_param_lc> is an unrecognized IETF-like tag so return and language subtag end end end

--[[---< L A N G U A G E _ P A R A M E T E R >--

Gets language name from a provided two- or three-character ISO 639 code. If a code is recognized by MediaWiki, use the returned name; if not, then use the value that was provided with the language parameter.

When |language= contains a recognized language (either code or name), the page is assigned to the category for that code: Category:Norwegian-language sources (no). For valid three-character code languages, the page is assigned to the single category for '639-2' codes: Category:CS1 ISO 639-2 language sources.

Languages that are the same as the local wiki are not categorized. MediaWiki does not recognize three-character equivalents of two-character codes: code 'ar' is recognized but code 'ara' is not.

This function supports multiple languages in the form |language=nb, French, th where the language names or codes are separated from each other by commas with optional space characters.

]]

local function language_parameter (lang) local tag;																	-- some form of IETF-like language tag; language subtag with optional region, sript, vatiant, etc subtags local lang_subtag;															-- ve populates |language= with mostly unecessary region subtags the MediaWiki does not recognize; this is the base language subtag local name;																	-- the language name local language_list = {};													-- table of language names to be rendered local names_t = {};															-- table made from the value assigned to |language=

local this_wiki_name = mw.language.fetchLanguageName (cfg.this_wiki_code, cfg.this_wiki_code);	-- get this wiki's language name

names_t = mw.text.split (lang, '%s*,%s*');									-- names should be a comma separated list

for _, lang in ipairs (names_t) do											-- reuse lang here because we don't yet know if lang is a language name or a language tag name, tag = name_tag_get (lang);										-- attempt to get name/tag pair for ; has proper capitalization; is lowercase

if utilities.is_set (tag) then lang_subtag = tag:gsub ('^(%a%a%a?)%-.*', '%1');					-- for categorization, strip any IETF-like tags from language tag

if cfg.this_wiki_code ~= lang_subtag then							-- when the language is not the same as this wiki's language if 2 == lang_subtag:len then									-- and is a two-character tag utilities.add_prop_cat ('foreign-lang-source', {name, tag}, lang_subtag);		-- categorize it; tag appended to allow for multiple language categorization else															-- or is a recognized language (but has a three-character tag) utilities.add_prop_cat ('foreign-lang-source-2', {lang_subtag}, lang_subtag);			-- categorize it differently TODO: support multiple three-character tag categories per cs1|2 template? end elseif cfg.local_lang_cat_enable then								-- when the language and this wiki's language are the same and categorization is enabled utilities.add_prop_cat ('local-lang-source', {name, lang_subtag});		-- categorize it			end else name = lang;														-- return whatever has so that we show something utilities.set_message ('maint_unknown_lang');						-- add maint category if not already added end table.insert (language_list, name); name = '';																-- so we can reuse it	end name = utilities.make_sep_list (#language_list, language_list); if (1 == #language_list) and (lang_subtag == cfg.this_wiki_code) then		-- when only one language, find lang name in this wiki lang name; for |language=en-us, 'English' in 'American English' return '';																-- if one language and that language is this wiki's return an empty string (no annotation) end return (" " .. wrap_msg ('language', name));								-- otherwise wrap with '(in ...)' -- TODO: should only return blank or name rather than full list	so we can clean up the bunched parenthetical elements Language, Type, Format end

--[[---< S E T _ C S _ S T Y L E >--

Gets the default CS style configuration for the given mode. Returns default separator and either postscript as passed in or the default. In CS1, the default postscript and separator are '.'. In CS2, the default postscript is the empty string and the default separator is ','.

]]

local function set_cs_style (postscript, mode) if utilities.is_set(postscript) then -- emit a maintenance message if user postscript is the default cs1 postscript -- we catch the opposite case for cs2 in set_style if mode == 'cs1' and postscript == cfg.presentation['ps_' .. mode] then utilities.set_message ('maint_postscript'); end else postscript = cfg.presentation['ps_' .. mode]; end return cfg.presentation['sep_' .. mode], postscript; end

--[[--< S E T _ S T Y L E >-

Sets the separator and postscript styles. Checks the |mode= first and the
 * 1) invoke CitationClass second. Removes the postscript if postscript == none.

]]

local function set_style (mode, postscript, cite_class) local sep; if 'cs2' == mode then sep, postscript = set_cs_style (postscript, 'cs2'); elseif 'cs1' == mode then sep, postscript = set_cs_style (postscript, 'cs1'); elseif 'citation' == cite_class	then sep, postscript = set_cs_style (postscript, 'cs2'); else sep, postscript = set_cs_style (postscript, 'cs1'); end

if cfg.keywords_xlate[postscript:lower] == 'none' then -- emit a maintenance message if user postscript is the default cs2 postscript -- we catch the opposite case for cs1 in set_cs_style if 'cs2' == mode or ('cs1' ~= mode and 'citation' == cite_class) then	-- should not emit maint message utilities.set_message ('maint_postscript'); end postscript = ''; end return sep, postscript end

--[=[-< I S _ P D F >---

Determines if a URL has the file extension that is one of the PDF file extensions used by MediaWiki:Common.css when applying the PDF icon to external links.

returns true if file extension is one of the recognized extensions, else false

]=]

local function is_pdf (url) return url:match ('%.pdf$') or url:match ('%.PDF$') or		url:match ('%.pdf[%?#]') or url:match ('%.PDF[%?#]') or		url:match ('%.PDF&#035') or url:match ('%.pdf&#035'); end

--[[--< S T Y L E _ F O R M A T >---

Applies CSS style to |format=, |chapter-format=, etc. Also emits an error message if the format parameter does not have a matching URL parameter. If the format parameter is not set and the URL contains a file extension that is recognized as a PDF document by MediaWiki's commons.css, this code will set the format parameter to (PDF) with the appropriate styling.

]]

local function style_format (format, url, fmt_param, url_param) if utilities.is_set (format) then format = utilities.wrap_style ('format', format);						-- add leading space, parentheses, resize if not utilities.is_set (url) then utilities.set_message ('err_format_missing_url', {fmt_param, url_param});	-- add an error message end elseif is_pdf (url) then													-- format is not set so if URL is a PDF file then format = utilities.wrap_style ('format', 'PDF');						-- set format to PDF else format = '';															-- empty string for concatenation end return format; end

--[[-< G E T _ D I S P L A Y _ N A M E S >--

Returns a number that defines the number of names displayed for author and editor name lists and a Boolean flag to indicate when et al. should be appended to the name list.

When the value assigned to |display-xxxxors= is a number greater than or equal to zero, return the number and the previous state of the 'etal' flag (false by default but may have been set to true if the name list contains some variant of the text 'et al.').

When the value assigned to |display-xxxxors= is the keyword 'etal', return a number that is one greater than the number of authors in the list and set the 'etal' flag true. This will cause the list_people to display all of the names in the name list followed by 'et al.'

In all other cases, returns nil and the previous state of the 'etal' flag.

inputs: max: A['DisplayAuthors'] or A['DisplayEditors'], etc; a number or some flavor of etal count: #a or #e list_name: 'authors' or 'editors' etal: author_etal or editor_etal

This function sets an error message when |display-xxxxors= value greater than or equal to number of names but not when comes from global settings. When using global settings, is set to the keyword 'cs1 config' which is used to supress the normal error. Error is suppressed because it is to be expected that some citations in an article will have the same or fewer names that the limit specified in.

]]

local function get_display_names (max, count, list_name, etal, param) if utilities.is_set (max) then if 'etal' == max:lower:gsub("[ '%.]", '') then						-- the :gsub portion makes 'etal' from a variety of 'et al.' spellings and stylings max = count + 1;													-- number of authors + 1 so display all author name plus et al.			etal = true;														-- overrides value set by extract_names elseif max:match ('^%d+$') then											-- if is a string of numbers max = tonumber (max);												-- make it a number if (max >= count) and ('cs1 config' ~= param) then					-- error when local |display-xxxxors= value greater than or equal to number of names; not an error when using global setting utilities.set_message ('err_disp_name', {param, max});			-- add error message max = nil; end else																	-- not a valid keyword or number utilities.set_message ('err_disp_name', {param, max});				-- add error message max = nil;															-- unset; as if |display-xxxxors= had not been set end end return max, etal; end

--[[--< E X T R A _ T E X T _ I N _ P A G E _ C H E C K >---

Adds error if |page=, |pages=, |quote-page=, |quote-pages= has what appears to be some form of p. or pp. abbreviation in the first characters of the parameter content.

check page for extraneous p, p., pp, pp., pg, pg. at start of parameter value: good pattern: '^P[^%.P%l]' matches when page begins PX or P# but not Px		     where x and X are letters and # is a digit bad pattern: '^[Pp][PpGg]' matches when page begins pp, pP, Pp, PP, pg, pG, Pg, PG

]]

local function extra_text_in_page_check (val, name) if not val:match (cfg.vol_iss_pg_patterns.good_ppattern) then for _, pattern in ipairs (cfg.vol_iss_pg_patterns.bad_ppatterns) do		-- spin through the selected sequence table of patterns if val:match (pattern) then											-- when a match, error so				utilities.set_message ('err_extra_text_pages', name);	 		-- add error message return;															-- and done end end end end

--[[--< E X T R A _ T E X T _ I N _ V O L _ I S S _ C H E C K >

Adds error if |volume= or |issue= has what appears to be some form of redundant 'type' indicator. Applies to both; this function looks for issue text in both |issue= and |volume= and looks for volume-like text in |voluem= and |issue=.

For |volume=: 'V.', or 'Vol.' (with or without the dot) abbreviations or 'Volume' in the first characters of the parameter content (all case insensitive). 'V' and 'v' (without the dot) are presumed to be roman numerals so are allowed.

For |issue=: 'No.', 'I.', 'Iss.' (with or without the dot) abbreviations, or 'Issue' in the first characters of the parameter content (all case insensitive); numero styling: 'n°' with degree sign U+00B0, and № precomposed numero sign U+2116. Single character values ('v', 'i', 'n') allowed when not followed by separator character ('.', ':', '=', or whitespace character) – param values are trimmed of whitespace by MediaWiki before delivered to the module. is |volume= or |issue= parameter value is |volume= or |issue= parameter name for error message is 'v' for |volume=, 'i' for |issue=

sets error message on failure; returns nothing

]]

local function extra_text_in_vol_iss_check (val, name, selector) if not utilities.is_set (val) then return; end local handler = 'v' == selector and 'err_extra_text_volume' or 'err_extra_text_issue'; val = val:lower;															-- force parameter value to lower case

for _, pattern in ipairs (cfg.vol_iss_pg_patterns.vi_patterns_t) do			-- spin through the sequence table of patterns if val:match (pattern) then												-- when a match, error so			utilities.set_message (handler, name);								-- add error message return;																-- and done end end end

--[=[-< G E T _ V _ N A M E _ T A B L E >--

split apart a |vauthors= or |veditors= parameter. This function allows for corporate names, wrapped in doubled parentheses to also have commas; in the old version of the code, the doubled parentheses were included in the rendered citation and in the metadata. Individual author names may be wikilinked

|vauthors=Jones AB, White EB, ((Black, Brown, and Co.))

]=]

local function get_v_name_table (vparam, output_table, output_link_table) local name_table = mw.text.split(vparam, "%s*,%s*");						-- names are separated by commas local wl_type, label, link;													-- wl_type not used here; just a placeholder local i = 1; while name_table[i] do		if name_table[i]:match ('^%(%(.*[^%)][^%)]$') then						-- first segment of corporate with one or more commas; this segment has the opening doubled parentheses local name = name_table[i]; i = i + 1;															-- bump indexer to next segment while name_table[i] do name = name .. ', ' .. name_table[i];							-- concatenate with previous segments if name_table[i]:match ('^.*%)%)$') then						-- if this table member has the closing doubled parentheses break;														-- and done reassembling so				end i = i + 1;														-- bump indexer end table.insert (output_table, name);									-- and add corporate name to the output table table.insert (output_link_table, '');								-- no wikilink else wl_type, label, link = utilities.is_wikilink (name_table[i]);		-- wl_type is: 0, no wl (text in label variable); 1, D; 2, L|D table.insert (output_table, label);									-- add this name if 1 == wl_type then table.insert (output_link_table, label);						-- simple wikilink D else table.insert (output_link_table, link);							-- no wikilink or L|D; add this link if there is one, else empty string end end i = i + 1; end return output_table; end

--[[--< P A R S E _ V A U T H O R S _ V E D I T O R S >

This function extracts author / editor names from |vauthors= or |veditors= and finds matching |xxxxor-maskn= and
 * xxxxor-linkn= in args. It then returns a table of assembled names just as extract_names does.

Author / editor names in |vauthors= or |veditors= must be in Vancouver system style. Corporate or institutional names may sometimes be required and because such names will often fail the is_good_vanc_name and other format compliance tests, are wrapped in doubled parentheses ((corporate name)) to suppress the format tests.

Supports generational suffixes Jr, 2nd, 3rd, 4th–6th.

This function sets the Vancouver error when a required comma is missing and when there is a space between an author's initials.

]]

local function parse_vauthors_veditors (args, vparam, list_name) local names = {};															-- table of names assembled from |vauthors=, |author-maskn=, |author-linkn= local v_name_table = {}; local v_link_table = {};													-- when name is wikilinked, targets go in this table local etal = false;															-- return value set to true when we find some form of et al. vauthors parameter local last, first, link, mask, suffix; local corporate = false;

vparam, etal = name_has_etal (vparam, etal, true);							-- find and remove variations on et al. do not categorize (do it here because et al. might have a period) v_name_table = get_v_name_table (vparam, v_name_table, v_link_table);		-- names are separated by commas

for i, v_name in ipairs(v_name_table) do		first = '';																-- set to empty string for concatenation and because it may have been set for previous author/editor local accept_name; v_name, accept_name = utilities.has_accept_as_written (v_name);			-- remove accept-this-as-written markup when it wraps all of <v_name>

if accept_name then last = v_name; corporate = true;													-- flag used in list_people elseif string.find(v_name, "%s") then if v_name:find('[;%.]') then										-- look for commonly occurring punctuation characters; add_vanc_error (cfg.err_msg_supl.punctuation, i); end local lastfirstTable = {} lastfirstTable = mw.text.split(v_name, "%s+") first = table.remove(lastfirstTable);								-- removes and returns value of last element in table which should be initials or generational suffix

if not mw.ustring.match (first, '^%u+$') then						-- mw.ustring here so that later we will catch non-Latin characters suffix = first;													-- not initials so assume that whatever we got is a generational suffix first = table.remove(lastfirstTable);							-- get what should be the initials from the table end last = table.concat(lastfirstTable, ' ')							-- returns a string that is the concatenation of all other names that are not initials and generational suffix if not utilities.is_set (last) then first = '';														-- unset last = v_name;													-- last empty because something wrong with first add_vanc_error (cfg.err_msg_supl.name, i); end if mw.ustring.match (last, '%a+%s+%u+%s+%a+') then add_vanc_error (cfg.err_msg_supl['missing comma'], i);			-- matches last II last; the case when a comma is missing end if mw.ustring.match (v_name, ' %u %u$') then						-- this test is in the wrong place TODO: move or replace with a more appropriate test add_vanc_error (cfg.err_msg_supl.initials, i);					-- matches a space between two initials end else last = v_name;														-- last name or single corporate name? Doesn't support multiword corporate names? do we need this? end if utilities.is_set (first) then if not mw.ustring.match (first, "^%u?%u$") then						-- first shall contain one or two upper-case letters, nothing else add_vanc_error (cfg.err_msg_supl.initials, i);					-- too many initials; mixed case initials (which may be ok Romanization); hyphenated initials end is_good_vanc_name (last, first, suffix, i);							-- check first and last before restoring the suffix which may have a non-Latin digit if utilities.is_set (suffix) then first = first .. ' ' .. suffix;									-- if there was a suffix concatenate with the initials suffix = '';													-- unset so we don't add this suffix to all subsequent names end else if not corporate then is_good_vanc_name (last, '', nil, i); end end

link = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i ) or v_link_table[i]; mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i ); names[i] = {last = last, first = first, link = link, mask = mask, corporate = corporate};		-- add this assembled name to our names list end return names, etal;															-- all done, return our list of names end

--[[--< S E L E C T _ A U T H O R _ E D I T O R _ S O U R C E >

Select one of |authors=, |authorn= / |lastn / firstn=, or |vauthors= as the source of the author name list or select one of |editorn= / editor-lastn= / |editor-firstn= or |veditors= as the source of the editor name list.

Only one of these appropriate three will be used. The hierarchy is: |authorn= (and aliases) highest and |authors= lowest;
 * editorn= (and aliases) highest and |veditors= lowest (support for |editors= withdrawn)

When looking for |authorn= / |editorn= parameters, test |xxxxor1= and |xxxxor2= (and all of their aliases); stops after the second test which mimicks the test used in extract_names when looking for a hole in the author name list. There may be a better way to do this, I just haven't discovered what that way is.

Emits an error message when more than one xxxxor name source is provided.

In this function, vxxxxors = vauthors or veditors; xxxxors = authors as appropriate.

]]

local function select_author_editor_source (vxxxxors, xxxxors, args, list_name) local lastfirst = false; if utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 1 ) or		-- do this twice in case we have a |first1= without a |last1=; this ... utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 1 ) or		-- ... also catches the case where |first= is used with |vauthors= utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 2 ) or utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 2 ) then lastfirst = true; end

if (utilities.is_set (vxxxxors) and true == lastfirst) or					-- these are the three error conditions (utilities.is_set (vxxxxors) and utilities.is_set (xxxxors)) or		(true == lastfirst and utilities.is_set (xxxxors)) then local err_name; if 'AuthorList' == list_name then									-- figure out which name should be used in error message err_name = 'author'; else err_name = 'editor'; end utilities.set_message ('err_redundant_parameters', err_name .. '-name-list parameters');	-- add error message end

if true == lastfirst then return 1 end;										-- return a number indicating which author name source to use if utilities.is_set (vxxxxors) then return 2 end; if utilities.is_set (xxxxors) then return 3 end; return 1;																	-- no authors so return 1; this allows missing author name test to run in case there is a first without last end

--[[--< I S _ V A L I D _ P A R A M E T E R _ V A L U E >--

This function is used to validate a parameter's assigned value for those parameters that have only a limited number of allowable values (yes, y, true, live, dead, etc.). When the parameter value has not been assigned a value (missing or empty in the source template) the function returns the value specified by ret_val. If the parameter value is one of the list of allowed values returns the translated value; else, emits an error message and returns the value specified by ret_val.

TODO: explain

]]

local function is_valid_parameter_value (value, name, possible, ret_val, invert) if not utilities.is_set (value) then return ret_val;															-- an empty parameter is ok	end

if (not invert and utilities.in_array (value, possible)) then				-- normal; is in table return cfg.keywords_xlate[value];										-- return translation of parameter keyword elseif invert and not utilities.in_array (value, possible) then				-- invert; is not in table return value;															-- return as it is	else utilities.set_message ('err_invalid_param_val', {name, value});			-- not an allowed value so add error message return ret_val; end end

--[[--< T E R M I N A T E _ N A M E _ L I S T >

This function terminates a name list (author, contributor, editor) with a separator character (sepc) and a space when the last character is not a sepc character or when the last three characters are not sepc followed by two closing square brackets (close of a wikilink). When either of these is true, the name_list is terminated with a single space character.

]]

local function terminate_name_list (name_list, sepc) if (string.sub (name_list, -3, -1) == sepc .. '. ') then					-- if already properly terminated return name_list;														-- just return the name list elseif (string.sub (name_list, -1, -1) == sepc) or (string.sub (name_list, -3, -1) == sepc .. ']]') then	-- if last name in list ends with sepc char return name_list .. " ";												-- don't add another else return name_list .. sepc .. ' ';										-- otherwise terminate the name list end end

--[[-< F O R M A T _ V O L U M E _ I S S U E >-

returns the concatenation of the formatted volume and issue (or journal article number) parameters as a single string; or formatted volume or formatted issue, or an empty string if neither are set.

]] local function format_volume_issue (volume, issue, article, cite_class, origin, sepc, lower) if not utilities.is_set (volume) and not utilities.is_set (issue) and not utilities.is_set (article) then return ''; end

-- same condition as in format_pages_sheets local is_journal = 'journal' == cite_class or (utilities.in_array (cite_class, {'citation', 'map', 'interview'}) and 'journal' == origin);

local is_numeric_vol = volume and (volume:match ('^[MDCLXVI]+$') or volume:match ('^%d+$'));	-- is only uppercase roman numerals or only digits? local is_long_vol = volume and (4 < mw.ustring.len(volume));				-- is |volume= value longer than 4 characters? if volume and (not is_numeric_vol and is_long_vol) then						-- when not all digits or Roman numerals, is |volume= longer than 4 characters? utilities.add_prop_cat ('long-vol');									-- yes, add properties cat end

if is_journal then															-- journal-style formatting local vol = '';

if utilities.is_set (volume) then if is_numeric_vol then												-- |volume= value all digits or all uppercase Roman numerals? vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, volume});	-- render in bold face elseif is_long_vol then												-- not all digits or Roman numerals; longer than 4 characters? vol = utilities.substitute (cfg.messages['j-vol'], {sepc, utilities.hyphen_to_dash (volume)});	-- not bold else																-- four or fewer characters vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, utilities.hyphen_to_dash (volume)});	-- bold end end vol = vol .. (utilities.is_set (issue) and utilities.substitute (cfg.messages['j-issue'], issue) or '') vol = vol .. (utilities.is_set (article) and utilities.substitute (cfg.messages['j-article-num'], article) or '') return vol; end if 'podcast' == cite_class and utilities.is_set (issue) then return wrap_msg ('issue', {sepc, issue}, lower); end if 'conference' == cite_class and utilities.is_set (article) then			-- |article-number= supported only in journal and conference cites if utilities.is_set (volume) and utilities.is_set (article) then		-- both volume and article number return wrap_msg ('vol-art', {sepc, utilities.hyphen_to_dash (volume), article}, lower); elseif utilities.is_set (article) then									-- article number alone; when volume alone, handled below return wrap_msg ('art', {sepc, article}, lower); end end

-- all other types of citation if utilities.is_set (volume) and utilities.is_set (issue) then return wrap_msg ('vol-no', {sepc, utilities.hyphen_to_dash (volume), issue}, lower); elseif utilities.is_set (volume) then return wrap_msg ('vol', {sepc, utilities.hyphen_to_dash (volume)}, lower); else return wrap_msg ('issue', {sepc, issue}, lower); end end

--[[-< F O R M A T _ P A G E S _ S H E E T S >-

adds static text to one of |page(s)= or |sheet(s)= values and returns it with all of the others set to empty strings. The return order is: page, pages, sheet, sheets

Singular has priority over plural when both are provided.

]]

local function format_pages_sheets (page, pages, sheet, sheets, cite_class, origin, sepc, nopp, lower) if 'map' == cite_class then													-- only cite map supports sheet(s) as in-source locators if utilities.is_set (sheet) then if 'journal' == origin then return , , wrap_msg ('j-sheet', sheet, lower), ''; else return , , wrap_msg ('sheet', {sepc, sheet}, lower), ''; end elseif utilities.is_set (sheets) then if 'journal' == origin then return , , '', wrap_msg ('j-sheets', sheets, lower); else return , , '', wrap_msg ('sheets', {sepc, sheets}, lower); end end end

local is_journal = 'journal' == cite_class or (utilities.in_array (cite_class, {'citation', 'map', 'interview'}) and 'journal' == origin); if utilities.is_set (page) then if is_journal then return utilities.substitute (cfg.messages['j-page(s)'], page), , , ''; elseif not nopp then return utilities.substitute (cfg.messages['p-prefix'], {sepc, page}), , , ''; else return utilities.substitute (cfg.messages['nopp'], {sepc, page}), , , ''; end elseif utilities.is_set (pages) then if is_journal then return utilities.substitute (cfg.messages['j-page(s)'], pages), , , ''; elseif tonumber(pages) ~= nil and not nopp then							-- if pages is only digits, assume a single page number return , utilities.substitute (cfg.messages['p-prefix'], {sepc, pages}), , ''; elseif not nopp then return , utilities.substitute (cfg.messages['pp-prefix'], {sepc, pages}), , ''; else return , utilities.substitute (cfg.messages['nopp'], {sepc, pages}), , ''; end end return , , , ;														-- return empty strings end

--[[--< I N S O U R C E _ L O C _ G E T >--

returns one of the in-source locators: page, pages, or at.

If any of these are interwiki links to Wikisource, returns the label portion of the interwiki-link as plain text for use in COinS. This COinS thing is done because here we convert an interwiki-link to an external link and add an icon span around that; get_coins_pages doesn't know about the span. TODO: should it?

TODO: add support for sheet and sheets?; streamline;

TODO: make it so that this function returns only one of the three as the single in-source (the return value assigned to a new name)?

]]

local function insource_loc_get (page, page_orig, pages, pages_orig, at) local ws_url, ws_label, coins_pages, L;										-- for Wikisource interwiki-links; TODO: this corrupts page metadata (span remains in place after cleanup; fix there?)

if utilities.is_set (page) then if utilities.is_set (pages) or utilities.is_set (at) then pages = '';															-- unset the others at = ''; end extra_text_in_page_check (page, page_orig);								-- emit error message when |page= value begins with what looks like p., pp., etc.

ws_url, ws_label, L = wikisource_url_make (page);						-- make ws URL from |page= interwiki link; link portion L becomes tooltip label if ws_url then page = external_link (ws_url, ws_label .. ' ', 'ws link in page');	-- space char after label to move icon away from in-source text; TODO: a better way to do this? page = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, page}); coins_pages = ws_label; end elseif utilities.is_set (pages) then if utilities.is_set (at) then at = '';															-- unset end extra_text_in_page_check (pages, pages_orig);							-- emit error message when |page= value begins with what looks like p., pp., etc.

ws_url, ws_label, L = wikisource_url_make (pages);						-- make ws URL from |pages= interwiki link; link portion L becomes tooltip label if ws_url then pages = external_link (ws_url, ws_label .. ' ', 'ws link in pages');	-- space char after label to move icon away from in-source text; TODO: a better way to do this? pages = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, pages}); coins_pages = ws_label; end elseif utilities.is_set (at) then ws_url, ws_label, L = wikisource_url_make (at);							-- make ws URL from |at= interwiki link; link portion L becomes tooltip label if ws_url then at = external_link (ws_url, ws_label .. ' ', 'ws link in at');	-- space char after label to move icon away from in-source text; TODO: a better way to do this? at = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, at}); coins_pages = ws_label; end end return page, pages, at, coins_pages; end

--[[--< I S _ U N I Q U E _ A R C H I V E _ U R L >

add error message when |archive-url= value is same as |url= or chapter-url= (or alias...) value

]]

local function is_unique_archive_url (archive, url, c_url, source, date) if utilities.is_set (archive) then if archive == url or archive == c_url then utilities.set_message ('err_bad_url', {utilities.wrap_style ('parameter', source)});	-- add error message return , ;														-- unset |archive-url= and |archive-date= because same as |url= or |chapter-url= end end

return archive, date; end

--[=[-< A R C H I V E _ U R L _ C H E C K >

Check archive.org URLs to make sure they at least look like they are pointing at valid archives and not to the save snapshot URL or to calendar pages. When the archive URL is 'https://web.archive.org/save/' (or http://...) archive.org saves a snapshot of the target page in the URL. That is something that Wikipedia should not allow unwitting readers to do.

When the archive.org URL does not have a complete timestamp, archive.org chooses a snapshot according to its own algorithm or provides a calendar 'search' result. WP:ELNO discourages links to search results.

This function looks at the value assigned to |archive-url= and returns empty strings for |archive-url= and |archive-url= holds an archive.org save command URL |archive-url= is an archive.org URL that does not have a complete timestamp (YYYYMMDDhhmmss 14 digits) in the correct place otherwise returns |archive-url= and |archive-date=
 * archive-date= and an error message when:

There are two mostly compatible archive.org URLs: //web.archive.org/ ... -- the old form //web.archive.org/web/ ... -- the new form

The old form does not support or map to the new form when it contains a display flag. There are four identified flags ('id_', 'js_', 'cs_', 'im_') but since archive.org ignores others following the same form (two letters and an underscore) we don't check for these specific flags but we do check the form.

This function supports a preview mode. When the article is rendered in preview mode, this function may return a modified archive URL: for save command errors, return undated wildcard (/*/) for timestamp errors when the timestamp has a wildcard, return the URL unmodified for timestamp errors when the timestamp does not have a wildcard, return with timestamp limited to six digits plus wildcard (/yyyymm*/)

A secondary function is to return an archive-url timestamp from those urls that have them (archive.org and archive.today). The timestamp is used by validation.archive_date_check to see if the value in |archive-date= matches the timestamp in the archive url.

]=]

local function archive_url_check (url, date) local err_msg = '';															-- start with the error message empty local path, timestamp, flag;												-- portions of the archive.org URL timestamp = url:match ('//archive.today/(%d%d%d%d%d%d%d%d%d%d%d%d%d%d)/') or	-- get timestamp from archive.today urls url:match ('//archive.today/(%d%d%d%d%.%d%d%.%d%d%-%d%d%d%d%d%d)/');		-- this timestamp needs cleanup if timestamp then															-- if this was an archive.today url ... return url, date, timestamp:gsub ('[%.%-]', '');						-- return ArchiveURL, ArchiveDate, and timestamp (dots and dashes removed) from |archive-url=, and done end -- here for archive.org urls if (not url:match('//web%.archive%.org/')) and (not url:match('//liveweb%.archive%.org/')) then		-- also deprecated liveweb Wayback machine URL return url, date;														-- not an archive.org archive, return ArchiveURL and ArchiveDate end

if url:match('//web%.archive%.org/save/') then								-- if a save command URL, we don't want to allow saving of the target page err_msg = cfg.err_msg_supl.save; url = url:gsub ('(//web%.archive%.org)/save/', '%1/*/', 1);				-- for preview mode: modify ArchiveURL elseif url:match('//liveweb%.archive%.org/') then err_msg = cfg.err_msg_supl.liveweb; else path, timestamp, flag = url:match('//web%.archive%.org/([^%d]*)(%d+)([^/]*)/');	-- split out some of the URL parts for evaluation if not path then														-- malformed in some way; pattern did not match err_msg = cfg.err_msg_supl.timestamp; elseif 14 ~= timestamp:len then										-- path and flag optional, must have 14-digit timestamp here err_msg = cfg.err_msg_supl.timestamp; if '*' ~= flag then local replacement = timestamp:match ('^%d%d%d%d%d%d') or timestamp:match ('^%d%d%d%d');	-- get the first 6 (YYYYMM) or first 4 digits (YYYY) if replacement then												-- nil if there aren't at least 4 digits (year) replacement = replacement .. string.rep ('0', 14 - replacement:len);	-- year or yearmo (4 or 6 digits) zero-fill to make 14-digit timestamp url=url:gsub ('(//web%.archive%.org/[^%d]*)%d[^/]*', '%1' .. replacement .. '*', 1)	-- for preview, modify ts to 14 digits plus splat for calendar display end end elseif utilities.is_set (path) and 'web/' ~= path then					-- older archive URLs do not have the extra 'web/' path element err_msg = cfg.err_msg_supl.path; elseif utilities.is_set (flag) and not utilities.is_set (path) then		-- flag not allowed with the old form URL (without the 'web/' path element) err_msg = cfg.err_msg_supl.flag; elseif utilities.is_set (flag) and not flag:match ('%a%a_') then		-- flag if present must be two alpha characters and underscore (requires 'web/' path element) err_msg = cfg.err_msg_supl.flag; else return url, date, timestamp;										-- return ArchiveURL, ArchiveDate, and timestamp from |archive-url= end end -- if here, something not right so	utilities.set_message ('err_archive_url', {err_msg});						-- add error message and

if is_preview_mode then return url, date, timestamp;											-- preview mode so return ArchiveURL, ArchiveDate, and timestamp from |archive-url= else return , ;															-- return empty strings for ArchiveURL and ArchiveDate end end

--[[--< P L A C E _ C H E C K >

check |place=, |publication-place=, |location= to see if these params include digits. This function added because many editors misuse location to specify the in-source location (|page(s)= and |at= are supposed to do that)

returns the original parameter value without modification; added maint cat when parameter value contains digits

]]

local function place_check (param_val) if not utilities.is_set (param_val) then									-- parameter empty or omitted return param_val;														-- return that empty state end if mw.ustring.find (param_val, '%d') then									-- not empty, are there digits in the parameter value utilities.set_message ('maint_location');								-- yep, add maint cat end return param_val;															-- and done end

--[[--< I S _ A R C H I V E D _ C O P Y >--

compares |title= to 'Archived copy' (placeholder added by bots that can't find proper title); if matches, return true; nil else

]]

local function is_archived_copy (title) title = mw.ustring.lower(title);											-- switch title to lower case if title:find (cfg.special_case_translation.archived_copy.en) then			-- if title is 'Archived copy' return true; elseif cfg.special_case_translation.archived_copy['local'] then if mw.ustring.find (title, cfg.special_case_translation.archived_copy['local']) then	-- mw.ustring because might not be Latin script return true; end end end

--[[--< D I S P L A Y _ N A M E S _ S E L E C T >--

for any of the |display-authors=, |display-editors=, etc parameters, select either the local or global setting. When both are present, look at <local_display_names> value. When the value is some sort of 'et al.'string, special handling is required.

When has |display- = AND this template has |display- =etal AND: the number of names specified by <number_of_names> is: greater than the number specified in the global |display- = parameter (<global_display_names>) use global |display- = parameter value set overridden maint category less than or equal to the number specified in the global |display- = parameter use local |display- = parameter value

The purpose of this function is to prevent categorizing a template that has fewer names than the global setting to keep the etal annotation specified by <local_display_names>.

]]

local function display_names_select (global_display_names, local_display_names, param_name, number_of_names, test) if global_display_names and utilities.is_set (local_display_names) then		-- when both if 'etal' == local_display_names:lower:gsub("[ '%.]", '') then		-- the :gsub portion makes 'etal' from a variety of 'et al.' spellings and stylings number_of_names = tonumber (number_of_names);						-- convert these to numbers for comparison local global_display_names_num = tonumber (global_display_names);	-- <global_display_names> not set when parameter value is not digits

if number_of_names > global_display_names_num then					-- template has more names than global config allows to be displayed? utilities.set_message ('maint_overridden_setting');				-- set a maint message because global is overriding local |display- =etal return global_display_names, 'cs1 config';						-- return global with spoof parameter name (for get_display_names) else return local_display_names, param_name;							-- return local because fewer names so let <local_display_names> control end end -- here when <global_display_names> and <local_display_names> both numbers; <global_display_names> controls utilities.set_message ('maint_overridden_setting');						-- set a maint message return global_display_names, 'cs1 config';								-- return global with spoof parameter name (for get_display_names) end -- here when only one of <global_display_names> or <local_display_names> set if global_display_names then return global_display_names, 'cs1 config';								-- return global with spoof parameter name (for get_display_names) else return local_display_names, param_name;									-- return local end end

--[[--< C I T A T I O N 0 >

This is the main function doing the majority of the citation formatting.

]]

local function citation0( config, args ) -- 	Load Input Parameters	The argument_wrapper facilitates the mapping of multiple aliases to single internal variable. local A = argument_wrapper ( args ); local i

-- Pick out the relevant fields from the arguments. Different citation templates -- define different field names for the same underlying things.

local author_etal; local a	= {};																-- authors list from |lastn= / |firstn= pairs or |vauthors= local Authors; local NameListStyle; if cfg.global_cs1_config_t['NameListStyle'] then						-- global setting in overrides local |name-list-style= parameter value; nil when empty or assigned value invalid NameListStyle = is_valid_parameter_value (cfg.global_cs1_config_t['NameListStyle'], 'cs1 config: name-list-style', cfg.keywords_lists['name-list-style'], '');	-- error messaging 'param' here is a hoax else NameListStyle = is_valid_parameter_value (A['NameListStyle'], A:ORIGIN('NameListStyle'), cfg.keywords_lists['name-list-style'], ''); end

if cfg.global_cs1_config_t['NameListStyle'] and utilities.is_set (A['NameListStyle']) then	-- when template has |name-list-style= which global setting has overridden utilities.set_message ('maint_overridden_setting');					-- set a maint message end

local Collaboration = A['Collaboration'];

do																			-- to limit scope of selected local selected = select_author_editor_source (A['Vauthors'], A['Authors'], args, 'AuthorList'); if 1 == selected then a, author_etal = extract_names (args, 'AuthorList');				-- fetch author list from |authorn= / |lastn= / |firstn=, |author-linkn=, and |author-maskn= elseif 2 == selected then NameListStyle = 'vanc';												-- override whatever |name-list-style= might be			a, author_etal = parse_vauthors_veditors (args, A['Vauthors'], 'AuthorList');	-- fetch author list from |vauthors=, |author-linkn=, and |author-maskn= elseif 3 == selected then Authors = A['Authors'];												-- use content of |people= or |credits=; |authors= is deprecated; TODO: constrain |people= and |credits= to cite av media, episode, serial? end if utilities.is_set (Collaboration) then author_etal = true;													-- so that |display-authors=etal not required end end

local editor_etal; local e	= {};																-- editors list from |editor-lastn= / |editor-firstn= pairs or |veditors=

do																			-- to limit scope of selected local selected = select_author_editor_source (A['Veditors'], nil, args, 'EditorList');	-- support for |editors= withdrawn if 1 == selected then e, editor_etal = extract_names (args, 'EditorList');				-- fetch editor list from |editorn= / |editor-lastn= / |editor-firstn=, |editor-linkn=, and |editor-maskn= elseif 2 == selected then NameListStyle = 'vanc';												-- override whatever |name-list-style= might be			e, editor_etal = parse_vauthors_veditors (args, args.veditors, 'EditorList');	-- fetch editor list from |veditors=, |editor-linkn=, and |editor-maskn= end end local Chapter = A['Chapter'];												-- done here so that we have access to |contribution= from |chapter= aliases local Chapter_origin = A:ORIGIN ('Chapter'); local Contribution;															-- because contribution is required for contributor(s) if 'contribution' == Chapter_origin then Contribution = Chapter;												-- get the name of the contribution end local c = {};																-- contributors list from |contributor-lastn= / contributor-firstn= pairs if utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (A['Periodical']) then	-- |contributor= and |contribution= only supported in book cites c = extract_names (args, 'ContributorList');							-- fetch contributor list from |contributorn= / |contributor-lastn=, -firstn=, -linkn=, -maskn= if 0 < #c then if not utilities.is_set (Contribution) then							-- |contributor= requires |contribution= utilities.set_message ('err_contributor_missing_required_param', 'contribution');	-- add missing contribution error message c = {};															-- blank the contributors' table; it is used as a flag later end if 0 == #a then														-- |contributor= requires |author= utilities.set_message ('err_contributor_missing_required_param', 'author');	-- add missing author error message c = {};															-- blank the contributors' table; it is used as a flag later end end else																		-- if not a book cite if utilities.select_one (args, cfg.aliases['ContributorList-Last'], 'err_redundant_parameters', 1 ) then	-- are there contributor name list parameters? utilities.set_message ('err_contributor_ignored');					-- add contributor ignored error message end Contribution = nil;														-- unset end

local Title = A['Title']; local TitleLink = A['TitleLink'];

local auto_select = '';														-- default is auto local accept_link; TitleLink, accept_link = utilities.has_accept_as_written (TitleLink, true);	-- test for accept-this-as-written markup if (not accept_link) and utilities.in_array (TitleLink, {'none', 'pmc', 'doi'}) then -- check for special keywords auto_select = TitleLink;												-- remember selection for later TitleLink = '';															-- treat as if |title-link= would have been empty end

TitleLink = link_title_ok (TitleLink, A:ORIGIN ('TitleLink'), Title, 'title');	-- check for wiki-markup in |title-link= or wiki-markup in |title= when |title-link= is set

local Section = '';															-- only; preset to empty string for concatenation if not used if 'map' == config.CitationClass and 'section' == Chapter_origin then Section = A['Chapter'];													-- get |section= from |chapter= alias list; |chapter= and the other aliases not supported in 		Chapter = '';															-- unset for now; will be reset later from |map= if present end

local Periodical = A['Periodical']; local Periodical_origin = A:ORIGIN('Periodical'); local ScriptPeriodical = A['ScriptPeriodical']; local ScriptPeriodical_origin = A:ORIGIN('ScriptPeriodical'); local TransPeriodical = A['TransPeriodical']; local TransPeriodical_origin = A:ORIGIN ('TransPeriodical'); if (utilities.in_array (config.CitationClass, {'book', 'encyclopaedia'}) and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical) or utilities.is_set (TransPeriodical))) then local param; if utilities.is_set (Periodical) then									-- get a parameter name from one of these periodical related meta-parameters Periodical = '';													-- unset because not valid or  parameters param = Periodical_origin											-- get parameter name for error messaging elseif utilities.is_set (TransPeriodical) then TransPeriodical = '';												-- unset because not valid or  parameters param = TransPeriodical_origin;										-- get parameter name for error messaging elseif utilities.is_set (ScriptPeriodical) then ScriptPeriodical = '';												-- unset because not valid or  parameters param = ScriptPeriodical_origin;									-- get parameter name for error messaging end

if utilities.is_set (param) then										-- if we found one utilities.set_message ('err_periodical_ignored', {param});			-- emit an error message end end

if utilities.is_set (Periodical) then local i;		Periodical, i = utilities.strip_apostrophe_markup (Periodical);			-- strip apostrophe markup so that metadata isn't contaminated if i then																-- non-zero when markup was stripped so emit an error message utilities.set_message ('err_apostrophe_markup', {Periodical_origin}); end end

if 'mailinglist' == config.CitationClass then								-- special case for if utilities.is_set (Periodical) and utilities.is_set (A ['MailingList']) then	-- both set emit an error TODO: make a function for this and similar? utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', Periodical_origin) .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'mailinglist')}); end

Periodical = A ['MailingList'];											-- error or no, set Periodical to |mailinglist= value because this template is 		Periodical_origin = A:ORIGIN('MailingList'); end

-- web and news not tested for now because of -- Wikipedia:Administrators%27_noticeboard#Is_there_a_semi-automated_tool_that_could_fix_these_annoying_"Cite_Web"_errors? if not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) then	-- 'periodical' templates require periodical parameter --	local p = {['journal'] = 'journal', ['magazine'] = 'magazine', ['news'] = 'newspaper', ['web'] = 'website'};	-- for error message local p = {['journal'] = 'journal', ['magazine'] = 'magazine'};			-- for error message if p[config.CitationClass] then utilities.set_message ('err_missing_periodical', {config.CitationClass, p[config.CitationClass]}); end end local Volume; if 'citation' == config.CitationClass then if utilities.is_set (Periodical) then if not utilities.in_array (Periodical_origin, cfg.citation_no_volume_t) then	-- does not render |volume= when these parameters are used Volume = A['Volume'];											-- but does for all other 'periodicals' end elseif utilities.is_set (ScriptPeriodical) then if 'script-website' ~= ScriptPeriodical_origin then					-- does not render volume for |script-website= Volume = A['Volume'];											-- but does for all other 'periodicals' end else Volume = A['Volume'];												-- and does for non-'periodical' cites end elseif utilities.in_array (config.CitationClass, cfg.templates_using_volume) then	-- render |volume= for cs1 according to the configuration settings Volume = A['Volume']; end extra_text_in_vol_iss_check (Volume, A:ORIGIN ('Volume'), 'v');

local Issue; if 'citation' == config.CitationClass then if utilities.is_set (Periodical) and utilities.in_array (Periodical_origin, cfg.citation_issue_t) then	-- may render |issue= when these parameters are used Issue = utilities.hyphen_to_dash (A['Issue']); end elseif utilities.in_array (config.CitationClass, cfg.templates_using_issue) then	-- conference & map books do not support issue; listed here because included in settings table if not (utilities.in_array (config.CitationClass, {'conference', 'map', 'citation'}) and not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical))) then Issue = utilities.hyphen_to_dash (A['Issue']); end end local ArticleNumber;

if utilities.in_array (config.CitationClass, {'journal', 'conference'}) or ('citation' == config.CitationClass and utilities.is_set (Periodical) and 'journal' == Periodical_origin) then ArticleNumber = A['ArticleNumber']; end

extra_text_in_vol_iss_check (Issue, A:ORIGIN ('Issue'), 'i');

local Page; local Pages; local At; local QuotePage; local QuotePages; if not utilities.in_array (config.CitationClass, cfg.templates_not_using_page) then		-- TODO: rewrite to emit ignored parameter error message? Page = A['Page']; Pages = utilities.hyphen_to_dash (A['Pages']); At = A['At']; QuotePage = A['QuotePage']; QuotePages = utilities.hyphen_to_dash (A['QuotePages']); end

local Edition = A['Edition']; local PublicationPlace = place_check (A['PublicationPlace'], A:ORIGIN('PublicationPlace')); local Place = place_check (A['Place'], A:ORIGIN('Place')); local PublisherName = A['PublisherName']; local PublisherName_origin = A:ORIGIN('PublisherName'); if utilities.is_set (PublisherName) and (cfg.keywords_xlate['none'] ~= PublisherName) then local i = 0; PublisherName, i = utilities.strip_apostrophe_markup (PublisherName);	-- strip apostrophe markup so that metadata isn't contaminated; publisher is never italicized if i and (0 < i) then													-- non-zero when markup was stripped so emit an error message utilities.set_message ('err_apostrophe_markup', {PublisherName_origin}); end end if ('document' == config.CitationClass) and not utilities.is_set (PublisherName) then utilities.set_message ('err_missing_publisher', {config.CitationClass, 'publisher'}); end

local Newsgroup = A['Newsgroup'];											-- TODO: strip apostrophe markup? local Newsgroup_origin = A:ORIGIN('Newsgroup');

if 'newsgroup' == config.CitationClass then if utilities.is_set (PublisherName) and (cfg.keywords_xlate['none'] ~= PublisherName) then	-- general use parameter |publisher= not allowed in cite newsgroup utilities.set_message ('err_parameter_ignored', {PublisherName_origin}); end

PublisherName = nil;													-- ensure that this parameter is unset for the time being; will be used again after COinS end

local URL = A['URL'];														-- TODO: better way to do this for URL, ChapterURL, and MapURL? local UrlAccess = is_valid_parameter_value (A['UrlAccess'], A:ORIGIN('UrlAccess'), cfg.keywords_lists['url-access'], nil); if not utilities.is_set (URL) and utilities.is_set (UrlAccess) then UrlAccess = nil; utilities.set_message ('err_param_access_requires_param', 'url'); end local ChapterURL = A['ChapterURL']; local ChapterUrlAccess = is_valid_parameter_value (A['ChapterUrlAccess'], A:ORIGIN('ChapterUrlAccess'), cfg.keywords_lists['url-access'], nil); if not utilities.is_set (ChapterURL) and utilities.is_set (ChapterUrlAccess) then ChapterUrlAccess = nil; utilities.set_message ('err_param_access_requires_param', {A:ORIGIN('ChapterUrlAccess'):gsub ('%-access', '')}); end

local MapUrlAccess = is_valid_parameter_value (A['MapUrlAccess'], A:ORIGIN('MapUrlAccess'), cfg.keywords_lists['url-access'], nil); if not utilities.is_set (A['MapURL']) and utilities.is_set (MapUrlAccess) then MapUrlAccess = nil; utilities.set_message ('err_param_access_requires_param', {'map-url'}); end

local this_page = mw.title.getCurrentTitle;								-- also used for COinS and for language local no_tracking_cats = is_valid_parameter_value (A['NoTracking'], A:ORIGIN('NoTracking'), cfg.keywords_lists['yes_true_y'], nil);

-- check this page to see if it is in one of the namespaces that cs1 is not supposed to add to the error categories if not utilities.is_set (no_tracking_cats) then								-- ignore if we are already not going to categorize this page if cfg.uncategorized_namespaces[this_page.namespace] then				-- is this page's namespace id one of the uncategorized namespace ids? no_tracking_cats = "true";											-- set no_tracking_cats end for _, v in ipairs (cfg.uncategorized_subpages) do						-- cycle through page name patterns if this_page.text:match (v) then									-- test page name against each pattern no_tracking_cats = "true";										-- set no_tracking_cats break;															-- bail out if one is found end end end -- check for extra |page=, |pages= or |at= parameters. (also sheet and sheets while we're at it) utilities.select_one (args, {'page', 'p', 'pp', 'pages', 'at', 'sheet', 'sheets'}, 'err_redundant_parameters');	-- this is a dummy call simply to get the error message and category

local coins_pages; Page, Pages, At, coins_pages = insource_loc_get (Page, A:ORIGIN('Page'), Pages, A:ORIGIN('Pages'), At);

local NoPP = is_valid_parameter_value (A['NoPP'], A:ORIGIN('NoPP'), cfg.keywords_lists['yes_true_y'], nil);

if utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- both |publication-place= and |place= (|location=) allowed if different utilities.add_prop_cat ('location-test');								-- add property cat to evaluate how often PublicationPlace and Place are used together if PublicationPlace == Place then Place = '';															-- unset; don't need both if they are the same end elseif not utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- when only |place= (|location=) is set ... PublicationPlace = Place;												-- promote |place= (|location=) to |publication-place end

if PublicationPlace == Place then Place = ''; end							-- don't need both if they are the same

local URL_origin = A:ORIGIN('URL');											-- get name of parameter that holds URL local ChapterURL_origin = A:ORIGIN('ChapterURL');							-- get name of parameter that holds ChapterURL local ScriptChapter = A['ScriptChapter']; local ScriptChapter_origin = A:ORIGIN ('ScriptChapter'); local Format = A['Format']; local ChapterFormat = A['ChapterFormat']; local TransChapter = A['TransChapter']; local TransChapter_origin = A:ORIGIN ('TransChapter'); local TransTitle = A['TransTitle']; local ScriptTitle = A['ScriptTitle']; --[[	Parameter remapping for cite encyclopedia:	When the citation has these parameters:		|encyclopedia= and |title= then map |title= to |article= and |encyclopedia= to |title= for rendering		|encyclopedia= and |article= then map |encyclopedia= to |title= for rendering

|trans-title= maps to |trans-chapter= when |title= is re-mapped |url= maps to |chapter-url= when |title= is remapped All other combinations of |encyclopedia=, |title=, and |article= are not modified ]]

local Encyclopedia = A['Encyclopedia'];										-- used as a flag by this module and by ~/COinS local ScriptEncyclopedia = A['ScriptEncyclopedia']; local TransEncyclopedia = A['TransEncyclopedia'];

if utilities.is_set (Encyclopedia) or utilities.is_set (ScriptEncyclopedia) then	-- emit error message when Encyclopedia set but template is other than or 		if 'encyclopaedia' ~= config.CitationClass and 'citation' ~= config.CitationClass then if utilities.is_set (Encyclopedia) then utilities.set_message ('err_parameter_ignored', {A:ORIGIN ('Encyclopedia')}); else utilities.set_message ('err_parameter_ignored', {A:ORIGIN ('ScriptEncyclopedia')}); end Encyclopedia = nil;													-- unset these because not supported by this template ScriptEncyclopedia = nil; TransEncyclopedia = nil; end elseif utilities.is_set (TransEncyclopedia) then utilities.set_message ('err_trans_missing_title', {'encyclopedia'}); end

if ('encyclopaedia' == config.CitationClass) or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then if utilities.is_set (Periodical) and utilities.is_set (Encyclopedia) then	-- when both parameters set emit an error message; only; Periodical not allowed in 			utilities.set_message ('err_periodical_ignored', {Periodical_origin}); end

if utilities.is_set (Encyclopedia) or utilities.is_set (ScriptEncyclopedia) then Periodical = Encyclopedia;											-- error or no, set Periodical to Encyclopedia for rendering; could (not legitimately) have both; use Encyclopedia Periodical_origin = A:ORIGIN ('Encyclopedia'); ScriptPeriodical = ScriptEncyclopedia; ScriptPeriodical_origin = A:ORIGIN ('ScriptEncyclopedia');

if utilities.is_set (Title) or utilities.is_set (ScriptTitle) then if not utilities.is_set (Chapter) then Chapter = Title;											-- |encyclopedia= and |title= are set so map |title= params to |article= params for rendering ScriptChapter = ScriptTitle; ScriptChapter_origin = A:ORIGIN('ScriptTitle') TransChapter = TransTitle; ChapterURL = URL; ChapterURL_origin = URL_origin; ChapterUrlAccess = UrlAccess; ChapterFormat = Format;

if not utilities.is_set (ChapterURL) and utilities.is_set (TitleLink) then Chapter = utilities.make_wikilink (TitleLink, Chapter); end Title = Periodical;											-- now map |encyclopedia= params to |title= params for rendering ScriptTitle = ScriptPeriodical or ''; TransTitle = TransEncyclopedia or ''; Periodical = '';											-- redundant so unset ScriptPeriodical = ''; URL = ''; Format = ''; TitleLink = ''; end elseif utilities.is_set (Chapter) or utilities.is_set (ScriptChapter) then	-- |title= not set Title = Periodical;												-- |encyclopedia= set and |article= set so map |encyclopedia= to |title= for rendering ScriptTitle = ScriptPeriodical or ''; TransTitle = TransEncyclopedia or ''; Periodical = '';												-- redundant so unset ScriptPeriodical = ''; end end end

-- special case for cite techreport. local ID = A['ID']; if (config.CitationClass == "techreport") then								-- special case for cite techreport if utilities.is_set (A['Number']) then									-- cite techreport uses 'number', which other citations alias to 'issue' if not utilities.is_set (ID) then									-- can we use ID for the "number"? ID = A['Number'];												-- yes, use it			else																-- ID has a value so emit error message utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'id') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'number')}); end end end

-- Account for the oddity that is, before generation of COinS data. local ChapterLink -- = A['ChapterLink'];									-- deprecated as a parameter but still used internally by cite episode local Conference = A['Conference']; local BookTitle = A['BookTitle']; local TransTitle_origin = A:ORIGIN ('TransTitle'); if 'conference' == config.CitationClass then if utilities.is_set (BookTitle) then Chapter = Title; Chapter_origin = 'title'; --		ChapterLink = TitleLink;											-- |chapter-link= is deprecated ChapterURL = URL; ChapterUrlAccess = UrlAccess; ChapterURL_origin = URL_origin; URL_origin = ''; ChapterFormat = Format; TransChapter = TransTitle; TransChapter_origin = TransTitle_origin; Title = BookTitle; Format = ''; --		TitleLink = ''; TransTitle = ''; URL = ''; end elseif 'speech' ~= config.CitationClass then Conference = '';														-- not cite conference or cite speech so make sure this is empty string end -- CS1/2 mode local Mode; if cfg.global_cs1_config_t['Mode'] then									-- global setting in overrides local |mode= parameter value; nil when empty or assigned value invalid Mode = is_valid_parameter_value (cfg.global_cs1_config_t['Mode'], 'cs1 config: mode', cfg.keywords_lists['mode'], '');	-- error messaging 'param' here is a hoax else Mode = is_valid_parameter_value (A['Mode'], A:ORIGIN('Mode'), cfg.keywords_lists['mode'], ''); end

if cfg.global_cs1_config_t['Mode'] and utilities.is_set (A['Mode']) then	-- when template has |mode= which global setting has overridden utilities.set_message ('maint_overridden_setting');					-- set a maint message end

-- separator character and postscript local sepc, PostScript = set_style (Mode:lower, A['PostScript'], config.CitationClass); -- controls capitalization of certain static text local use_lowercase = ( sepc == ',' ); -- cite map oddities local Cartography = ""; local Scale = ""; local Sheet = A['Sheet'] or ''; local Sheets = A['Sheets'] or ''; if config.CitationClass == "map" then if utilities.is_set (Chapter) then										--TODO: make a function for this and similar? utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'map') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', Chapter_origin)});	-- add error message end Chapter = A['Map']; Chapter_origin = A:ORIGIN('Map'); ChapterURL = A['MapURL']; ChapterURL_origin = A:ORIGIN('MapURL'); TransChapter = A['TransMap']; ScriptChapter = A['ScriptMap'] ScriptChapter_origin = A:ORIGIN('ScriptMap')

ChapterUrlAccess = MapUrlAccess; ChapterFormat = A['MapFormat'];

Cartography = A['Cartography']; if utilities.is_set ( Cartography ) then Cartography = sepc .. " " .. wrap_msg ('cartography', Cartography, use_lowercase); end Scale = A['Scale']; if utilities.is_set ( Scale ) then Scale = sepc .. " " .. Scale; end end

-- Account for the oddities that are and, before generation of COinS data. local Series = A['Series']; if 'episode' == config.CitationClass or 'serial' == config.CitationClass then local SeriesLink = A['SeriesLink'];

SeriesLink = link_title_ok (SeriesLink, A:ORIGIN ('SeriesLink'), Series, 'series');	-- check for wiki-markup in |series-link= or wiki-markup in |series= when |series-link= is set

local Network = A['Network']; local Station = A['Station']; local s, n = {}, {}; -- do common parameters first if utilities.is_set (Network) then table.insert(n, Network); end if utilities.is_set (Station) then table.insert(n, Station); end ID = table.concat(n, sepc .. ' '); if 'episode' == config.CitationClass then								-- handle the oddities that are strictly local Season = A['Season']; local SeriesNumber = A['SeriesNumber'];

if utilities.is_set (Season) and utilities.is_set (SeriesNumber) then	-- these are mutually exclusive so if both are set TODO: make a function for this and similar? utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'season') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'seriesno')});		-- add error message SeriesNumber = '';												-- unset; prefer |season= over |seriesno= end -- assemble a table of parts concatenated later into Series if utilities.is_set (Season) then table.insert(s, wrap_msg ('season', Season, use_lowercase)); end if utilities.is_set (SeriesNumber) then table.insert(s, wrap_msg ('seriesnum', SeriesNumber, use_lowercase)); end if utilities.is_set (Issue) then table.insert(s, wrap_msg ('episode', Issue, use_lowercase)); end Issue = '';															-- unset because this is not a unique parameter Chapter = Title;													-- promote title parameters to chapter ScriptChapter = ScriptTitle; ScriptChapter_origin = A:ORIGIN('ScriptTitle'); ChapterLink = TitleLink;											-- alias |episode-link= TransChapter = TransTitle; ChapterURL = URL; ChapterUrlAccess = UrlAccess; ChapterURL_origin = URL_origin; ChapterFormat = Format;

Title = Series;														-- promote series to title TitleLink = SeriesLink; Series = table.concat(s, sepc .. ' ');								-- this is concatenation of season, seriesno, episode number

if utilities.is_set (ChapterLink) and not utilities.is_set (ChapterURL) then	-- link but not URL Chapter = utilities.make_wikilink (ChapterLink, Chapter); elseif utilities.is_set (ChapterLink) and utilities.is_set (ChapterURL) then	-- if both are set, URL links episode; Series = utilities.make_wikilink (ChapterLink, Series); end URL = '';															-- unset TransTitle = ''; ScriptTitle = ''; Format = ''; else																	-- now oddities that are cite serial Issue = '';															-- unset because this parameter no longer supported by the citation/core version of cite serial Chapter = A['Episode'];												-- TODO: make |episode= available to cite episode someday? if utilities.is_set (Series) and utilities.is_set (SeriesLink) then Series = utilities.make_wikilink (SeriesLink, Series); end Series = utilities.wrap_style ('italic-title', Series);				-- series is italicized end end -- end of stuff

-- handle type parameter for those CS1 citations that have default values local TitleType = A['TitleType']; local Degree = A['Degree']; if utilities.in_array (config.CitationClass, {'AV-media-notes', 'document', 'interview', 'mailinglist', 'map', 'podcast', 'pressrelease', 'report', 'speech', 'techreport', 'thesis'}) then TitleType = set_titletype (config.CitationClass, TitleType); if utilities.is_set (Degree) and "Thesis" == TitleType then				-- special case for cite thesis TitleType = Degree .. ' ' .. cfg.title_types ['thesis']:lower; end end

if utilities.is_set (TitleType) then										-- if type parameter is specified TitleType = utilities.substitute ( cfg.messages['type'], TitleType);	-- display it in parentheses -- TODO: Hack on TitleType to fix bunched parentheses problem end

-- legacy: promote PublicationDate to Date if neither Date nor Year are set. local Date = A['Date']; local Date_origin;															-- to hold the name of parameter promoted to Date; required for date error messaging local PublicationDate = A['PublicationDate']; local Year = A['Year'];

if not utilities.is_set (Date) then Date = Year;															-- promote Year to Date Year = nil;																-- make nil so Year as empty string isn't used for CITEREF if not utilities.is_set (Date) and utilities.is_set (PublicationDate) then	-- use PublicationDate when |date= and |year= are not set Date = PublicationDate;												-- promote PublicationDate to Date PublicationDate = '';												-- unset, no longer needed Date_origin = A:ORIGIN('PublicationDate');							-- save the name of the promoted parameter else Date_origin = A:ORIGIN('Year');										-- save the name of the promoted parameter end else Date_origin = A:ORIGIN('Date');											-- not a promotion; name required for error messaging end

if PublicationDate == Date then PublicationDate = ''; end					-- if PublicationDate is same as Date, don't display in rendered citation

--	Go test all of the date-holding parameters for valid MOS:DATE format and make sure that dates are real dates. This must be done before we do COinS because here is where	we get the date used in the metadata.	Date validation supporting code is in Module:Citation/CS1/Date_validation

local DF = is_valid_parameter_value (A['DF'], A:ORIGIN('DF'), cfg.keywords_lists['df'], ''); if not utilities.is_set (DF) then DF = cfg.global_df;														-- local |df= if present overrides global df set by template end

local ArchiveURL; local ArchiveDate; local ArchiveFormat = A['ArchiveFormat']; local archive_url_timestamp;												-- timestamp from wayback machine url ArchiveURL, ArchiveDate, archive_url_timestamp = archive_url_check (A['ArchiveURL'], A['ArchiveDate']) ArchiveFormat = style_format (ArchiveFormat, ArchiveURL, 'archive-format', 'archive-url'); ArchiveURL, ArchiveDate = is_unique_archive_url (ArchiveURL, URL, ChapterURL, A:ORIGIN('ArchiveURL'), ArchiveDate);		-- add error message when URL or ChapterURL == ArchiveURL

local AccessDate = A['AccessDate']; local COinS_date = {};														-- holds date info extracted from |date= for the COinS metadata by Module:Date verification local DoiBroken = A['DoiBroken']; local Embargo = A['Embargo']; local anchor_year;															-- used in the CITEREF identifier do	-- create defined block to contain local variables error_message, date_parameters_list, mismatch local error_message = ''; -- AirDate has been promoted to Date so not necessary to check it		local date_parameters_list = { ['access-date'] = {val = AccessDate, name = A:ORIGIN ('AccessDate')}, ['archive-date'] = {val = ArchiveDate, name = A:ORIGIN ('ArchiveDate')}, ['date'] = {val = Date, name = Date_origin}, ['doi-broken-date'] = {val = DoiBroken, name = A:ORIGIN ('DoiBroken')}, ['pmc-embargo-date'] = {val = Embargo, name = A:ORIGIN ('Embargo')}, ['publication-date'] = {val = PublicationDate, name = A:ORIGIN ('PublicationDate')}, ['year'] = {val = Year, name = A:ORIGIN ('Year')}, };

local error_list = {}; anchor_year, Embargo = validation.dates(date_parameters_list, COinS_date, error_list);

if utilities.is_set (Year) and utilities.is_set (Date) then				-- both |date= and |year= not normally needed; validation.year_date_check (Year, A:ORIGIN ('Year'), Date, A:ORIGIN ('Date'), error_list); end if 0 == #error_list then												-- error free dates only; 0 when error_list is empty local modified = false;												-- flag if utilities.is_set (DF) then										-- if we need to reformat dates modified = validation.reformat_dates (date_parameters_list, DF);	-- reformat to DF format, use long month names if appropriate end

if true == validation.date_hyphen_to_dash (date_parameters_list) then	-- convert hyphens to dashes where appropriate modified = true; utilities.set_message ('maint_date_format');					-- hyphens were converted so add maint category end -- for those wikis that can and want to have English date names translated to the local language; not supported at en.wiki if cfg.date_name_auto_xlate_enable and validation.date_name_xlate (date_parameters_list, cfg.date_digit_auto_xlate_enable ) then utilities.set_message ('maint_date_auto_xlated');				-- add maint cat modified = true; end

if modified then													-- if the date_parameters_list values were modified AccessDate = date_parameters_list['access-date'].val;			-- overwrite date holding parameters with modified values ArchiveDate = date_parameters_list['archive-date'].val; Date = date_parameters_list['date'].val; DoiBroken = date_parameters_list['doi-broken-date'].val; PublicationDate = date_parameters_list['publication-date'].val; end

if archive_url_timestamp and utilities.is_set (ArchiveDate) then validation.archive_date_check (ArchiveDate, archive_url_timestamp, DF);	-- does YYYYMMDD in archive_url_timestamp match date in ArchiveDate end else utilities.set_message ('err_bad_date', {utilities.make_sep_list (#error_list, error_list)});	-- add this error message end end	-- end of do

if utilities.in_array (config.CitationClass, {'book', 'encyclopaedia'}) or	--, ; TODO: and others? ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) or			-- as an encylopedia citation ('citation' == config.CitationClass and not utilities.is_set (Periodical)) then		-- as a book citation if utilities.is_set (PublicationPlace) then if not utilities.is_set (PublisherName) then local date = COinS_date.rftdate and tonumber (COinS_date.rftdate:match ('%d%d%d%d'));	-- get year portion of COinS date (because in Arabic numerals); convert string to number if date and (1850 <= date) then								-- location has no publisher; if date is 1850 or later utilities.set_message ('maint_location_no_publisher');	-- add maint cat end else															-- PublisherName has a value if cfg.keywords_xlate['none'] == PublisherName then			-- if that value is 'none' (only for book and encyclopedia citations) PublisherName = '';										-- unset end end end end

local ID_list = {};															-- sequence table of rendered identifiers local ID_list_coins = {};													-- table of identifiers and their values from args; key is same as cfg.id_handlers's key local Class = A['Class'];													-- arxiv class identifier local ID_support = { {A['ASINTLD'], 'ASIN', 'err_asintld_missing_asin', A:ORIGIN ('ASINTLD')}, {DoiBroken, 'DOI', 'err_doibroken_missing_doi', A:ORIGIN ('DoiBroken')}, {Embargo, 'PMC', 'err_embargo_missing_pmc', A:ORIGIN ('Embargo')}, }

ID_list, ID_list_coins = identifiers.identifier_lists_get (args, {DoiBroken = DoiBroken, ASINTLD = A['ASINTLD'], Embargo = Embargo, Class = Class}, ID_support);

-- Account for the oddities that are, , , , , before generation of COinS data. if utilities.in_array (config.CitationClass, whitelist.preprint_template_list_t) then	-- |arxiv= or |eprint= required for cite arxiv; |biorxiv=, |citeseerx=, |medrxiv=, |ssrn= required for their templates if not (args[cfg.id_handlers[config.CitationClass:upper].parameters[1]] or 		-- can't use ID_list_coins k/v table here because invalid parameters omitted			args[cfg.id_handlers[config.CitationClass:upper].parameters[2]]) then			-- which causes unexpected parameter missing error message utilities.set_message ('err_' .. config.CitationClass .. '_missing');		-- add error message end

Periodical = ({['arxiv'] = 'arXiv', ['biorxiv'] = 'bioRxiv', ['citeseerx'] = 'CiteSeerX', ['medrxiv'] = 'medRxiv', ['ssrn'] = 'Social Science Research Network'})[config.CitationClass]; end

-- Link the title of the work if no |url= was provided, but we have a |pmc= or a |doi= with |doi-access=free

if config.CitationClass == "journal" and not utilities.is_set (URL) and not utilities.is_set (TitleLink) and not utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) then -- TODO: remove 'none' once existing citations have been switched to 'off', so 'none' can be used as token for "no title" instead if 'none' ~= cfg.keywords_xlate[auto_select] then						-- if auto-linking not disabled if identifiers.auto_link_urls[auto_select] then						-- manual selection URL = identifiers.auto_link_urls[auto_select];					-- set URL to be the same as identifier's external link URL_origin = cfg.id_handlers[auto_select:upper].parameters[1];	-- set URL_origin to parameter name for use in error message if citation is missing a |title= elseif identifiers.auto_link_urls['pmc'] then						-- auto-select PMC URL = identifiers.auto_link_urls['pmc'];						-- set URL to be the same as the PMC external link if not embargoed URL_origin = cfg.id_handlers['PMC'].parameters[1];				-- set URL_origin to parameter name for use in error message if citation is missing a |title= elseif identifiers.auto_link_urls['doi'] then						-- auto-select DOI URL = identifiers.auto_link_urls['doi']; URL_origin = cfg.id_handlers['DOI'].parameters[1]; end end

if utilities.is_set (URL) then											-- set when using an identifier-created URL if utilities.is_set (AccessDate) then								-- |access-date= requires |url=; identifier-created URL is not |url= utilities.set_message ('err_accessdate_missing_url');			-- add an error message AccessDate = '';												-- unset end

if utilities.is_set (ArchiveURL) then								-- |archive-url= requires |url=; identifier-created URL is not |url= utilities.set_message ('err_archive_missing_url');				-- add an error message ArchiveURL = '';												-- unset end end end

-- At this point fields may be nil if they weren't specified in the template use. We can use that fact. -- Test if citation has no title if	not utilities.is_set (Title) and not utilities.is_set (TransTitle) and not utilities.is_set (ScriptTitle) then	-- has special case for cite episode utilities.set_message ('err_citation_missing_title', {'episode' == config.CitationClass and 'series' or 'title'}); end

if utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) and utilities.in_array (config.CitationClass, {'journal', 'citation'}) and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and ('journal' == Periodical_origin or 'script-journal' == ScriptPeriodical_origin) then	-- special case for journal cites Title = '';														-- set title to empty string utilities.set_message ('maint_untitled');						-- add maint cat end

-- COinS metadata (see <http://ocoins.info/>) for automated parsing of citation information. -- handle the oddity that is cite encyclopedia and. Here we presume that -- when Periodical, Title, and Chapter are all set, then Periodical is the book (encyclopedia) title, Title -- is the article title, and Chapter is a section within the article. So, we remap local coins_chapter = Chapter;												-- default assuming that remapping not required local coins_title = Title;													-- et tu	if 'encyclopaedia' == config.CitationClass or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then if utilities.is_set (Chapter) and utilities.is_set (Title) and utilities.is_set (Periodical) then		-- if all are used then coins_chapter = Title;												-- remap coins_title = Periodical; end end local coins_author = a;														-- default for coins rft.au 	if 0 < #c then																-- but if contributor list coins_author = c;														-- use that instead end -- this is the function call to COinS local OCinSoutput = metadata.COinS({		['Periodical'] = utilities.strip_apostrophe_markup (Periodical),		-- no markup in the metadata		['Encyclopedia'] = Encyclopedia,										-- just a flag; content ignored by ~/COinS		['Chapter'] = metadata.make_coins_title (coins_chapter, ScriptChapter),	-- Chapter and ScriptChapter stripped of bold / italic / accept-as-written markup		['Degree'] = Degree;													-- cite thesis only		['Title'] = metadata.make_coins_title (coins_title, ScriptTitle),		-- Title and ScriptTitle stripped of bold / italic / accept-as-written markup		['PublicationPlace'] = PublicationPlace,		['Date'] = COinS_date.rftdate,											-- COinS_date.* has correctly formatted date values if Date is valid;		['Season'] = COinS_date.rftssn,		['Quarter'] = COinS_date.rftquarter,		['Chron'] = COinS_date.rftchron,		['Series'] = Series,		['Volume'] = Volume,		['Issue'] = Issue,		['ArticleNumber'] = ArticleNumber, ['Pages'] = coins_pages or metadata.get_coins_pages (first_set ({Sheet, Sheets, Page, Pages, At, QuotePage, QuotePages}, 7)),	-- pages stripped of external links ['Edition'] = Edition, ['PublisherName'] = PublisherName or Newsgroup,							-- any apostrophe markup already removed from PublisherName ['URL'] = first_set ({ChapterURL, URL}, 2), ['Authors'] = coins_author, ['ID_list'] = ID_list_coins, ['RawPage'] = this_page.prefixedText, }, config.CitationClass);

-- Account for the oddities that are, , , , and AFTER generation of COinS data. if utilities.in_array (config.CitationClass, whitelist.preprint_template_list_t) then	-- we have set rft.jtitle in COinS to arXiv, bioRxiv, CiteSeerX, medRxiv, or ssrn now unset so it isn't displayed Periodical = '';														-- periodical not allowed in these templates; if article has been published, use cite journal end

-- special case for cite newsgroup. Do this after COinS because we are modifying Publishername to include some static text if 'newsgroup' == config.CitationClass and utilities.is_set (Newsgroup) then PublisherName = utilities.substitute (cfg.messages['newsgroup'], external_link( 'news:' .. Newsgroup, Newsgroup, Newsgroup_origin, nil )); end

local Editors; local EditorCount;															-- used only for choosing {ed.) or (eds.) annotation at end of editor name-list	local Contributors;															-- assembled contributors name list	local contributor_etal;	local Translators;															-- assembled translators name list	local translator_etal;	local t = {};																-- translators list from |translator-lastn= / translator-firstn= pairs	t = extract_names (args, 'TranslatorList');									-- fetch translator list from |translatorn= / |translator-lastn=, -firstn=, -linkn=, -maskn=	local Interviewers;																local interviewers_list = {};						interviewers_list = extract_names (args, 'InterviewerList');				-- process preferred interviewers parameters	local interviewer_etal;	-- Now perform various field substitutions.	-- We also add leading spaces and surrounding markup and punctuation to the	-- various parts of the citation, but only when they are non-nil. do local last_first_list; local control = { format = NameListStyle,												-- empty string, '&', 'amp', 'and', or 'vanc' maximum = nil,														-- as if display-authors or display-editors not set mode = Mode };

do																		-- do editor name list first because the now unsupported coauthors used to modify control table local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayEditors'], A['DisplayEditors'], A:ORIGIN ('DisplayEditors'), #e); control.maximum, editor_etal = get_display_names (display_names, #e, 'editors', editor_etal, param);

Editors, EditorCount = list_people (control, e, editor_etal);

if 1 == EditorCount and (true == editor_etal or 1 < #e) then		-- only one editor displayed but includes etal then EditorCount = 2;												-- spoof to display (eds.) annotation end end do																		-- now do interviewers local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayInterviewers'], A['DisplayInterviewers'], A:ORIGIN ('DisplayInterviewers'), #interviewers_list); control.maximum, interviewer_etal = get_display_names (display_names, #interviewers_list, 'interviewers', interviewer_etal, param);

Interviewers = list_people (control, interviewers_list, interviewer_etal); end do																		-- now do translators local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayTranslators'], A['DisplayTranslators'], A:ORIGIN ('DisplayTranslators'), #t); control.maximum, translator_etal = get_display_names (display_names, #t, 'translators', translator_etal, param);

Translators = list_people (control, t, translator_etal); end do																		-- now do contributors local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayContributors'], A['DisplayContributors'], A:ORIGIN ('DisplayContributors'), #c); control.maximum, contributor_etal = get_display_names (display_names, #c, 'contributors', contributor_etal, param);

Contributors = list_people (control, c, contributor_etal); end do																		-- now do authors local display_names, param = display_names_select (cfg.global_cs1_config_t['DisplayAuthors'], A['DisplayAuthors'], A:ORIGIN ('DisplayAuthors'), #a, author_etal); control.maximum, author_etal = get_display_names (display_names, #a, 'authors', author_etal, param);

last_first_list = list_people (control, a, author_etal);

if utilities.is_set (Authors) then Authors, author_etal = name_has_etal (Authors, author_etal, false, 'authors');	-- find and remove variations on et al.				if author_etal then Authors = Authors .. ' ' .. cfg.messages['et al'];			-- add et al. to authors parameter end else Authors = last_first_list;										-- either an author name list or an empty string end end																		-- end of do		if utilities.is_set (Authors) and utilities.is_set (Collaboration) then Authors = Authors .. ' (' .. Collaboration .. ')';					-- add collaboration after et al.		end

end

local ConferenceFormat = A['ConferenceFormat']; local ConferenceURL = A['ConferenceURL']; ConferenceFormat = style_format (ConferenceFormat, ConferenceURL, 'conference-format', 'conference-url'); Format = style_format (Format, URL, 'format', 'url');

-- special case for chapter format so no error message or cat when chapter not supported if not (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or		('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia))) then ChapterFormat = style_format (ChapterFormat, ChapterURL, 'chapter-format', 'chapter-url'); end

if not utilities.is_set (URL) then if utilities.in_array (config.CitationClass, {"web", "podcast", "mailinglist"}) or		-- |url= required for cite web, cite podcast, and cite mailinglist ('citation' == config.CitationClass and ('website' == Periodical_origin or 'script-website' == ScriptPeriodical_origin)) then	-- and required for with |website= or |script-website= utilities.set_message ('err_cite_web_url'); end -- do we have |accessdate= without either |url= or |chapter-url=? if utilities.is_set (AccessDate) and not utilities.is_set (ChapterURL) then		-- ChapterURL may be set when URL is not set; utilities.set_message ('err_accessdate_missing_url'); AccessDate = ''; end end

local UrlStatus = is_valid_parameter_value (A['UrlStatus'], A:ORIGIN('UrlStatus'), cfg.keywords_lists['url-status'], ''); local OriginalURL local OriginalURL_origin local OriginalFormat local OriginalAccess; UrlStatus = UrlStatus:lower;												-- used later when assembling archived text if utilities.is_set ( ArchiveURL ) then if utilities.is_set (ChapterURL) then 									-- if chapter-url= is set apply archive url to it			OriginalURL = ChapterURL;											-- save copy of source chapter's url for archive text OriginalURL_origin = ChapterURL_origin;								-- name of |chapter-url= parameter for error messages OriginalFormat = ChapterFormat;										-- and original |chapter-format=

if 'live' ~= UrlStatus then ChapterURL = ArchiveURL											-- swap-in the archive's URL ChapterURL_origin = A:ORIGIN('ArchiveURL')						-- name of |archive-url= parameter for error messages ChapterFormat = ArchiveFormat or '';							-- swap in archive's format ChapterUrlAccess = nil;											-- restricted access levels do not make sense for archived URLs end elseif utilities.is_set (URL) then OriginalURL = URL;													-- save copy of original source URL OriginalURL_origin = URL_origin;									-- name of URL parameter for error messages OriginalFormat = Format; 											-- and original |format= OriginalAccess = UrlAccess;

if 'live' ~= UrlStatus then											-- if URL set then |archive-url= applies to it				URL = ArchiveURL												-- swap-in the archive's URL URL_origin = A:ORIGIN('ArchiveURL')								-- name of archive URL parameter for error messages Format = ArchiveFormat or '';									-- swap in archive's format UrlAccess = nil;												-- restricted access levels do not make sense for archived URLs end end elseif utilities.is_set (UrlStatus) then									-- if |url-status= is set when |archive-url= is not set utilities.set_message ('maint_url_status');								-- add maint cat end

if utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or	-- if any of the 'periodical' cites except encyclopedia ('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) then local chap_param; if utilities.is_set (Chapter) then									-- get a parameter name from one of these chapter related meta-parameters chap_param = A:ORIGIN ('Chapter') elseif utilities.is_set (TransChapter) then chap_param = A:ORIGIN ('TransChapter') elseif utilities.is_set (ChapterURL) then chap_param = A:ORIGIN ('ChapterURL') elseif utilities.is_set (ScriptChapter) then chap_param = ScriptChapter_origin; else utilities.is_set (ChapterFormat) chap_param = A:ORIGIN ('ChapterFormat') end

if utilities.is_set (chap_param) then								-- if we found one utilities.set_message ('err_chapter_ignored', {chap_param});	-- add error message Chapter = '';													-- and set them to empty string to be safe with concatenation TransChapter = ''; ChapterURL = ''; ScriptChapter = ''; ChapterFormat = ''; end else																		-- otherwise, format chapter / article title local no_quotes = false;												-- default assume that we will be quoting the chapter parameter value if utilities.is_set (Contribution) and 0 < #c then						-- if this is a contribution with contributor(s) if utilities.in_array (Contribution:lower, cfg.keywords_lists.contribution) then	-- and a generic contribution title no_quotes = true;												-- then render it unquoted end end

Chapter = format_chapter_title (ScriptChapter, ScriptChapter_origin, Chapter, Chapter_origin, TransChapter, TransChapter_origin, ChapterURL, ChapterURL_origin, no_quotes, ChapterUrlAccess);		-- Contribution is also in Chapter if utilities.is_set (Chapter) then Chapter = Chapter .. ChapterFormat ; if 'map' == config.CitationClass and utilities.is_set (TitleType) then Chapter = Chapter .. ' ' .. TitleType;							-- map annotation here; not after title end Chapter = Chapter .. sepc .. ' ';		elseif utilities.is_set (ChapterFormat) then							-- |chapter= not set but |chapter-format= is so ... Chapter = ChapterFormat .. sepc .. ' ';								-- ... ChapterFormat has error message, we want to see it		end end

-- Format main title local plain_title = false; local accept_title; Title, accept_title = utilities.has_accept_as_written (Title, true);		-- remove accept-this-as-written markup when it wraps all of <Title> if accept_title and ('' == Title) then										-- only support forced empty for now "()" Title = cfg.messages['notitle'];										-- replace by predefined "No title" message -- TODO: utilities.set_message ( 'err_redundant_parameters', ...);	-- issue proper error message instead of muting ScriptTitle = '';													-- just mute for now TransTitle = '';													-- just mute for now plain_title = true;														-- suppress text decoration for descriptive title utilities.set_message ('maint_untitled');								-- add maint cat end

if not accept_title then													-- <Title> not wrapped in accept-as-written markup if '...' == Title:sub (-3) then											-- if ellipsis is the last three characters of |title= Title = Title:gsub ('(%.%.%.)%.+$', '%1');							-- limit the number of dots to three elseif not mw.ustring.find (Title, '%.%s*%a%.$') and					-- end of title is not a 'dot-(optional space-)letter-dot' initialism ... not mw.ustring.find (Title, '%s+%a%.$') then						-- ...and not a 'space-letter-dot' initial (Allium canadense L.) Title = mw.ustring.gsub(Title, '%' .. sepc .. '$', '');			-- remove any trailing separator character; sepc and ms.ustring here for languages that use multibyte separator characters end

if utilities.is_set (ArchiveURL) and is_archived_copy (Title) then utilities.set_message ('maint_archived_copy');						-- add maintenance category before we modify the content of Title end

if is_generic ('generic_titles', Title) then utilities.set_message ('err_generic_title');						-- set an error message end end

if (not plain_title) and (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'document', 'pressrelease', 'podcast', 'newsgroup', 'mailinglist', 'interview', 'arxiv', 'biorxiv', 'citeseerx', 'medrxiv', 'ssrn'}) or		('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) or		('map' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)))) then		-- special case for cite map when the map is in a periodical treat as an article Title = kern_quotes (Title);										-- if necessary, separate title's leading and trailing quote marks from module provided quote marks Title = utilities.wrap_style ('quoted-title', Title); Title = script_concatenate (Title, ScriptTitle, 'script-title');	-- tags, lang attribute, categorization, etc.; must be done after title is wrapped TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle ); elseif plain_title or ('report' == config.CitationClass) then				-- no styling for cite report and descriptive titles (otherwise same as above) Title = script_concatenate (Title, ScriptTitle, 'script-title');		-- tags, lang attribute, categorization, etc.; must be done after title is wrapped TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle );	-- for cite report, use this form for trans-title else Title = utilities.wrap_style ('italic-title', Title); Title = script_concatenate (Title, ScriptTitle, 'script-title');		-- tags, lang attribute, categorization, etc.; must be done after title is wrapped TransTitle = utilities.wrap_style ('trans-italic-title', TransTitle); end

if utilities.is_set (TransTitle) then if utilities.is_set (Title) then TransTitle = " " .. TransTitle; else utilities.set_message ('err_trans_missing_title', {'title'}); end end

if utilities.is_set (Title) then											-- TODO: is this the right place to be making Wikisource URLs? if utilities.is_set (TitleLink) and utilities.is_set (URL) then utilities.set_message ('err_wikilink_in_url');						-- set an error message because we can't have both TitleLink = '';														-- unset end if not utilities.is_set (TitleLink) and utilities.is_set (URL) then Title = external_link (URL, Title, URL_origin, UrlAccess) .. TransTitle .. Format; URL = '';															-- unset these because no longer needed Format = ""; elseif utilities.is_set (TitleLink) and not utilities.is_set (URL) then local ws_url; ws_url = wikisource_url_make (TitleLink);							-- ignore ws_label return; not used here if ws_url then Title = external_link (ws_url, Title .. ' ', 'ws link in title-link');	-- space char after Title to move icon away from italic text; TODO: a better way to do this? Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], TitleLink, Title}); Title = Title .. TransTitle; else Title = utilities.make_wikilink (TitleLink, Title) .. TransTitle; end else local ws_url, ws_label, L;											-- Title has italic or quote markup by the time we get here which causes is_wikilink to return 0 (not a wikilink) ws_url, ws_label, L = wikisource_url_make (Title:gsub('^[\'"]*(.-)[\'"]*$', '%1'));	-- make ws URL from |title= interwiki link (strip italic or quote markup); link portion L becomes tooltip label if ws_url then Title = Title:gsub ('%b[]', ws_label);							-- replace interwiki link with ws_label to retain markup Title = external_link (ws_url, Title .. ' ', 'ws link in title');	-- space char after Title to move icon away from italic text; TODO: a better way to do this? Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, Title}); Title = Title .. TransTitle; else Title = Title .. TransTitle; end end else Title = TransTitle; end

if utilities.is_set (Place) then Place = " " .. wrap_msg ('written', Place, use_lowercase) .. sepc .. " ";	end

local ConferenceURL_origin = A:ORIGIN('ConferenceURL');						-- get name of parameter that holds ConferenceURL if utilities.is_set (Conference) then if utilities.is_set (ConferenceURL) then Conference = external_link( ConferenceURL, Conference, ConferenceURL_origin, nil ); end Conference = sepc .. " " .. Conference .. ConferenceFormat; elseif utilities.is_set (ConferenceURL) then Conference = sepc .. " " .. external_link( ConferenceURL, nil, ConferenceURL_origin, nil ); end

local Position = ''; if not utilities.is_set (Position) then local Minutes = A['Minutes']; local Time = A['Time'];

if utilities.is_set (Minutes) then if utilities.is_set (Time) then		--TODO: make a function for this and similar? utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'minutes') .. cfg.presentation['sep_list_pair'] .. utilities.wrap_style ('parameter', 'time')}); end Position = " " .. Minutes .. " " .. cfg.messages['minutes']; else if utilities.is_set (Time) then local TimeCaption = A['TimeCaption'] if not utilities.is_set (TimeCaption) then TimeCaption = cfg.messages['event']; if sepc ~= '.' then TimeCaption = TimeCaption:lower; end end Position = " " .. TimeCaption .. " " .. Time; end end else Position = " " .. Position; At = ''; end

Page, Pages, Sheet, Sheets = format_pages_sheets (Page, Pages, Sheet, Sheets, config.CitationClass, Periodical_origin, sepc, NoPP, use_lowercase);

At = utilities.is_set (At) and (sepc .. " " .. At) or ""; Position = utilities.is_set (Position) and (sepc .. " " .. Position) or ""; if config.CitationClass == 'map' then local Sections = A['Sections'];											-- Section (singular) is an alias of Chapter so set earlier local Inset = A['Inset']; if utilities.is_set ( Inset ) then Inset = sepc .. " " .. wrap_msg ('inset', Inset, use_lowercase); end

if utilities.is_set ( Sections ) then Section = sepc .. " " .. wrap_msg ('sections', Sections, use_lowercase); elseif utilities.is_set ( Section ) then Section = sepc .. " " .. wrap_msg ('section', Section, use_lowercase); end At = At .. Inset .. Section; end

local Others = A['Others']; if utilities.is_set (Others) and 0 == #a and 0 == #e then					-- add maint cat when |others= has value and used without |author=, |editor= if config.CitationClass == "AV-media-notes" or config.CitationClass == "audio-visual" then							-- special maint for AV/M which has a lot of 'false' positives right now utilities.set_message ('maint_others_avm') else utilities.set_message ('maint_others'); end end Others = utilities.is_set (Others) and (sepc .. " " .. Others) or ""; if utilities.is_set (Translators) then Others = safe_join ({sepc .. ' ', wrap_msg ('translated', Translators, use_lowercase), Others}, sepc); end if utilities.is_set (Interviewers) then Others = safe_join ({sepc .. ' ', wrap_msg ('interview', Interviewers, use_lowercase), Others}, sepc); end local TitleNote = A['TitleNote']; TitleNote = utilities.is_set (TitleNote) and (sepc .. " " .. TitleNote) or ""; if utilities.is_set (Edition) then if Edition:match ('%f[%a][Ee]d%n?%.?$') or Edition:match ('%f[%a][Ee]dition$') then -- Ed, ed, Ed., ed., Edn, edn, Edn., edn. utilities.set_message ('err_extra_text_edition');					 -- add error message end Edition = " " .. wrap_msg ('edition', Edition); else Edition = ''; end

Series = utilities.is_set (Series) and wrap_msg ('series', {sepc, Series}) or "";	-- not the same as SeriesNum local Agency = A['Agency'] or '';											-- |agency= only supported in, , and certain  templates if utilities.is_set (Agency) then											-- this testing done here because supports 'news' citations if utilities.in_array (config.CitationClass, {'news', 'pressrelease', 'web'}) or ('citation' == config.CitationClass and utilities.in_array (Periodical_origin, {"newspaper", "work"})) then Agency = wrap_msg ('agency', {sepc, Agency});						-- format for rendering else Agency = '';														-- unset; not supported utilities.set_message ('err_parameter_ignored', {'agency'});		-- add error message end end Volume = format_volume_issue (Volume, Issue, ArticleNumber, config.CitationClass, Periodical_origin, sepc, use_lowercase);

if utilities.is_set (AccessDate) then local retrv_text = " " .. cfg.messages['retrieved']

AccessDate = nowrap_date (AccessDate);									-- wrap in nowrap span if date in appropriate format if (sepc ~= ".") then retrv_text = retrv_text:lower end				-- if mode is cs2, lower case AccessDate = utilities.substitute (retrv_text, AccessDate);				-- add retrieved text

AccessDate = utilities.substitute (cfg.presentation['accessdate'], {sepc, AccessDate});	-- allow editors to hide accessdates end if utilities.is_set (ID) then ID = sepc .. " " .. ID; end local Docket = A['Docket']; if "thesis" == config.CitationClass and utilities.is_set (Docket) then ID = sepc .. " Docket " .. Docket .. ID; end if "report" == config.CitationClass and utilities.is_set (Docket) then		-- for cite report when |docket= is set ID = sepc .. ' ' .. Docket;												-- overwrite ID even if |id= is set end

if utilities.is_set (URL) then URL = " " .. external_link( URL, nil, URL_origin, UrlAccess ); end

local Quote = A['Quote']; local TransQuote = A['TransQuote']; local ScriptQuote = A['ScriptQuote']; if utilities.is_set (Quote) or utilities.is_set (TransQuote) or utilities.is_set (ScriptQuote) then

if utilities.is_set (Quote) then if Quote:sub(1, 1) == '"' and Quote:sub(-1, -1) == '"' then			-- if first and last characters of quote are quote marks Quote = Quote:sub(2, -2);										-- strip them off end end Quote = kern_quotes (Quote);											-- kern if needed Quote = utilities.wrap_style ('quoted-text', Quote );					-- wrap in ... tags if utilities.is_set (ScriptQuote) then Quote = script_concatenate (Quote, ScriptQuote, 'script-quote');	-- tags, lang attribute, categorization, etc.; must be done after quote is wrapped end

if utilities.is_set (TransQuote) then if TransQuote:sub(1, 1) == '"' and TransQuote:sub(-1, -1) == '"' then -- if first and last characters of |trans-quote are quote marks TransQuote = TransQuote:sub(2, -2); -- strip them off end Quote = Quote .. " " .. utilities.wrap_style ('trans-quoted-title', TransQuote ); end

if utilities.is_set (QuotePage) or utilities.is_set (QuotePages) then	-- add page prefix local quote_prefix = ''; if utilities.is_set (QuotePage) then extra_text_in_page_check (QuotePage, 'quote-page');				-- add to maint cat if |quote-page= value begins with what looks like p., pp., etc.				if not NoPP then quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, QuotePage}), , , ''; else quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, QuotePage}), , , ''; end elseif utilities.is_set (QuotePages) then extra_text_in_page_check (QuotePages, 'quote-pages');			-- add to maint cat if |quote-pages= value begins with what looks like p., pp., etc.				if tonumber(QuotePages) ~= nil and not NoPP then				-- if only digits, assume single page quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, QuotePages}), , ; elseif not NoPP then quote_prefix = utilities.substitute (cfg.messages['pp-prefix'], {sepc, QuotePages}), , ; else quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, QuotePages}), , ; end end Quote = quote_prefix .. ": " .. Quote; else Quote = sepc .. " " .. Quote; end

PostScript = "";														-- cs1|2 does not supply terminal punctuation when |quote= is set end -- We check length of PostScript here because it will have been nuked by -- the quote parameters. We'd otherwise emit a message even if there wasn't	-- a displayed postscript. -- TODO: Should the max size (1) be configurable? -- TODO: Should we check a specific pattern? if utilities.is_set(PostScript) and mw.ustring.len(PostScript) > 1 then utilities.set_message ('maint_postscript') end local Archived; if utilities.is_set (ArchiveURL) then if not utilities.is_set (ArchiveDate) then								-- ArchiveURL set but ArchiveDate not set utilities.set_message ('err_archive_missing_date');					-- emit an error message ArchiveURL = '';													-- empty string for concatenation ArchiveDate = '';													-- empty string for concatenation end else if utilities.is_set (ArchiveDate) then									-- ArchiveURL not set but ArchiveDate is set utilities.set_message ('err_archive_date_missing_url');				-- emit an error message ArchiveURL = '';													-- empty string for concatenation ArchiveDate = '';													-- empty string for concatenation end end

if utilities.is_set (ArchiveURL) then local arch_text; if "live" == UrlStatus then arch_text = cfg.messages['archived']; if sepc ~= "." then arch_text = arch_text:lower end if utilities.is_set (ArchiveDate) then Archived = sepc .. ' ' .. utilities.substitute ( cfg.messages['archived-live'],					{external_link( ArchiveURL, arch_text, A:ORIGIN('ArchiveURL'), nil) .. ArchiveFormat, ArchiveDate } ); else Archived = ''; end if not utilities.is_set (OriginalURL) then utilities.set_message ('err_archive_missing_url'); Archived = '';													-- empty string for concatenation end elseif utilities.is_set (OriginalURL) then								-- UrlStatus is empty, 'dead', 'unfit', 'usurped', 'bot: unknown' if utilities.in_array (UrlStatus, {'unfit', 'usurped', 'bot: unknown'}) then arch_text = cfg.messages['archived-unfit']; if sepc ~= "." then arch_text = arch_text:lower end Archived = sepc .. ' ' .. arch_text .. ArchiveDate;				-- format already styled if 'bot: unknown' == UrlStatus then utilities.set_message ('maint_bot_unknown');				-- and add a category if not already added else utilities.set_message ('maint_unfit');						-- and add a category if not already added end else																-- UrlStatus is empty, 'dead' arch_text = cfg.messages['archived-dead']; if sepc ~= "." then arch_text = arch_text:lower end if utilities.is_set (ArchiveDate) then Archived = sepc .. " " .. utilities.substitute ( arch_text,						{ external_link( OriginalURL, cfg.messages['original'], OriginalURL_origin, OriginalAccess ) .. OriginalFormat, ArchiveDate } );	-- format already styled else Archived = '';												-- unset for concatenation end end else																	-- OriginalUrl not set utilities.set_message ('err_archive_missing_url'); Archived = '';														-- empty string for concatenation end elseif utilities.is_set (ArchiveFormat) then Archived = ArchiveFormat;												-- if set and ArchiveURL not set ArchiveFormat has error message else Archived = ''; end local TranscriptURL = A['TranscriptURL'] local TranscriptFormat = A['TranscriptFormat']; TranscriptFormat = style_format (TranscriptFormat, TranscriptURL, 'transcript-format', 'transcripturl'); local Transcript = A['Transcript']; local TranscriptURL_origin = A:ORIGIN('TranscriptURL');						-- get name of parameter that holds TranscriptURL if utilities.is_set (Transcript) then if utilities.is_set (TranscriptURL) then Transcript = external_link( TranscriptURL, Transcript, TranscriptURL_origin, nil ); end Transcript = sepc .. ' ' .. Transcript .. TranscriptFormat; elseif utilities.is_set (TranscriptURL) then Transcript = external_link( TranscriptURL, nil, TranscriptURL_origin, nil ); end

local Publisher; if utilities.is_set (PublicationDate) then PublicationDate = wrap_msg ('published', PublicationDate); end if utilities.is_set (PublisherName) then if utilities.is_set (PublicationPlace) then Publisher = sepc .. " " .. PublicationPlace .. ": " .. PublisherName .. PublicationDate; else Publisher = sepc .. " " .. PublisherName .. PublicationDate; end elseif utilities.is_set (PublicationPlace) then Publisher= sepc .. " " .. PublicationPlace .. PublicationDate; else Publisher = PublicationDate; end -- Several of the above rely upon detecting this as nil, so do it last. if (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical) or utilities.is_set (TransPeriodical)) then if utilities.is_set (Title) or utilities.is_set (TitleNote) then Periodical = sepc .. " " .. format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin); else Periodical = format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin); end end local Language = A['Language']; if utilities.is_set (Language) then Language = language_parameter (Language);								-- format, categories, name from ISO639-1, etc.	else Language='';															-- language not specified so make sure this is an empty string; -- TODO: need to extract the wrap_msg from language_parameter	so that we can solve parentheses bunching problem with Format/Language/TitleType end

--department=) and forces it to be " (Speech)" so that	the annotation directly follows the |title= parameter value in the citation rather than the |event= parameter value (if provided). if "speech" == config.CitationClass then									-- cite speech only TitleNote = TitleType;													-- move TitleType to TitleNote so that it renders ahead of |event= TitleType = '';															-- and unset

if utilities.is_set (Periodical) then									-- if Periodical, perhaps because of an included |website= or |journal= parameter if utilities.is_set (Conference) then								-- and if |event= is set Conference = Conference .. sepc .. " ";							-- then add appropriate punctuation to the end of the Conference variable before rendering end end end

-- Piece all bits together at last. Here, all should be non-nil. -- We build things this way because it is more efficient in LUA -- not to keep reassigning to the same string variable over and over.

local tcommon; local tcommon2;																-- used for book cite when |contributor= is set if utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (Periodical) then		-- special cases for book cites if utilities.is_set (Contributors) then									-- when we are citing foreword, preface, introduction, etc.			tcommon = safe_join ({Title, TitleNote}, sepc);						-- author and other stuff will come after this and before tcommon2 tcommon2 = safe_join ({TitleType, Series, Language, Volume, Others, Edition, Publisher}, sepc); else tcommon = safe_join ({Title, TitleNote, TitleType, Series, Language, Volume, Others, Edition, Publisher}, sepc); end

elseif 'map' == config.CitationClass then									-- special cases for cite map if utilities.is_set (Chapter) then										-- map in a book; TitleType is part of Chapter tcommon = safe_join ({Title, Edition, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc); elseif utilities.is_set (Periodical) then								-- map in a periodical tcommon = safe_join ({Title, TitleType, Periodical, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc); else																	-- a sheet or stand-alone map tcommon = safe_join ({Title, TitleType, Edition, Scale, Series, Language, Cartography, Others, Publisher}, sepc); end elseif 'episode' == config.CitationClass then								-- special case for cite episode tcommon = safe_join ({Title, TitleNote, TitleType, Series, Language, Edition, Publisher}, sepc);

else																		-- all other CS1 templates tcommon = safe_join ({Title, TitleNote, Conference, Periodical, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc); end if #ID_list > 0 then ID_list = safe_join( { sepc .. " ", table.concat( ID_list, sepc .. " " ), ID }, sepc ); else ID_list = ID; end local Via = A['Via']; Via = utilities.is_set (Via) and wrap_msg ('via', Via) or ''; local idcommon; if 'audio-visual' == config.CitationClass or 'episode' == config.CitationClass then	-- special case for cite AV media & cite episode position transcript idcommon = safe_join( { ID_list, URL, Archived, Transcript, AccessDate, Via, Quote }, sepc ); else idcommon = safe_join( { ID_list, URL, Archived, AccessDate, Via, Quote }, sepc ); end local text; local pgtext = Position .. Sheet .. Sheets .. Page .. Pages .. At;

local OrigDate = A['OrigDate']; OrigDate = utilities.is_set (OrigDate) and wrap_msg ('origdate', OrigDate) or ''; if utilities.is_set (Date) then if utilities.is_set (Authors) or utilities.is_set (Editors) then		-- date follows authors or editors when authors not set Date = " (" .. Date .. ")" .. OrigDate .. sepc .. " ";				-- in parentheses else																	-- neither of authors and editors set if (string.sub(tcommon, -1, -1) == sepc) then						-- if the last character of tcommon is sepc Date = " " .. Date .. OrigDate;									-- Date does not begin with sepc else Date = sepc .. " " .. Date .. OrigDate;							-- Date begins with sepc end end end if utilities.is_set (Authors) then if (not utilities.is_set (Date)) then									-- when date is set it's in parentheses; no Authors termination Authors = terminate_name_list (Authors, sepc);						-- when no date, terminate with 0 or 1 sepc and a space end if utilities.is_set (Editors) then local in_text = ''; local post_text = ''; if utilities.is_set (Chapter) and 0 == #c then in_text = cfg.messages['in'] .. ' ';				if (sepc ~= '.') then in_text = in_text:lower;									-- lowercase for cs2 end end if EditorCount <= 1 then post_text = ' (' .. cfg.messages['editor'] .. ')';				-- be consistent with no-author, no-date case else post_text = ' (' .. cfg.messages['editors'] .. ')'; end Editors = terminate_name_list (in_text .. Editors .. post_text, sepc);	-- terminate with 0 or 1 sepc and a space end if utilities.is_set (Contributors) then									-- book cite and we're citing the intro, preface, etc. local by_text = sepc .. ' ' .. cfg.messages['by'] .. ' ';			if (sepc ~= '.') then by_text = by_text:lower end					-- lowercase for cs2 Authors = by_text .. Authors;										-- author follows title so tweak it here if utilities.is_set (Editors) and utilities.is_set (Date) then		-- when Editors make sure that Authors gets terminated Authors = terminate_name_list (Authors, sepc);					-- terminate with 0 or 1 sepc and a space end if (not utilities.is_set (Date)) then								-- when date is set it's in parentheses; no Contributors termination Contributors = terminate_name_list (Contributors, sepc);		-- terminate with 0 or 1 sepc and a space end text = safe_join( {Contributors, Date, Chapter, tcommon, Authors, Place, Editors, tcommon2, pgtext, idcommon }, sepc ); else text = safe_join( {Authors, Date, Chapter, Place, Editors, tcommon, pgtext, idcommon }, sepc ); end elseif utilities.is_set (Editors) then if utilities.is_set (Date) then if EditorCount <= 1 then Editors = Editors .. cfg.presentation['sep_name'] .. cfg.messages['editor']; else Editors = Editors .. cfg.presentation['sep_name'] .. cfg.messages['editors']; end else if EditorCount <= 1 then Editors = Editors .. " (" .. cfg.messages['editor'] .. ")" .. sepc .. " "			else Editors = Editors .. " (" .. cfg.messages['editors'] .. ")" .. sepc .. " "			end end text = safe_join( {Editors, Date, Chapter, Place, tcommon, pgtext, idcommon}, sepc ); else if utilities.in_array (config.CitationClass, {"journal", "citation"}) and utilities.is_set (Periodical) then text = safe_join( {Chapter, Place, tcommon, pgtext, Date, idcommon}, sepc ); else text = safe_join( {Chapter, Place, tcommon, Date, pgtext, idcommon}, sepc ); end end

if utilities.is_set (PostScript) and PostScript ~= sepc then text = safe_join( {text, sepc}, sepc ); 								-- Deals with italics, spaces, etc.		if '.' == sepc then														-- remove final seperator if present text = text:gsub ('%' .. sepc .. '$', '');							-- dot must be escaped here else text = mw.ustring.gsub (text, sepc .. '$', '');						-- using ustring for non-dot sepc (likely a non-Latin character) end end text = safe_join( {text, PostScript}, sepc );

-- Now enclose the whole thing in a element local options_t = {}; options_t.class = cite_class_attribute_make (config.CitationClass, Mode);

local Ref = is_valid_parameter_value (A['Ref'], A:ORIGIN('Ref'), cfg.keywords_lists['ref'], nil, true);	-- nil when |ref=harv; A['Ref'] else

if 'none' ~= cfg.keywords_xlate[(Ref and Ref:lower) or ''] then local namelist_t = {};													-- holds selected contributor, author, editor name list local year = first_set ({Year, anchor_year}, 2);						-- Year first for legacy citations and for YMD dates that require disambiguation

if #c > 0 then															-- if there is a contributor list namelist_t = c;														-- select it		elseif #a > 0 then														-- or an author list namelist_t = a;		elseif #e > 0 then														-- or an editor list namelist_t = e;		end local citeref_id; if #namelist_t > 0 then													-- if there are names in namelist_t citeref_id = make_citeref_id (namelist_t, year);					-- go make the CITEREF anchor if mw.uri.anchorEncode (citeref_id) == ((Ref and mw.uri.anchorEncode (Ref)) or '') then	-- Ref may already be encoded (by ) so citeref_id must be encoded before comparison utilities.set_message ('maint_ref_duplicates_default'); end else citeref_id = '';													-- unset end options_t.id = Ref or citeref_id; end

if string.len (text:gsub('%b<>', '')) <= 2 then								-- remove html and html-like tags; then get length of what remains; z.error_cats_t = {};													-- blank the categories list z.error_msgs_t = {};													-- blank the error messages list OCinSoutput = nil;														-- blank the metadata string text = '';																-- blank the the citation utilities.set_message ('err_empty_citation');							-- set empty citation message and category end local render_t = {};														-- here we collect the final bits for concatenation into the rendered citation

if utilities.is_set (options_t.id) then										-- here we wrap the rendered citation in <cite ...>... tags table.insert (render_t, utilities.substitute (cfg.presentation['cite-id'], {mw.uri.anchorEncode(options_t.id), mw.text.nowiki(options_t.class), text}));	-- when |ref= is set or when there is a namelist else table.insert (render_t, utilities.substitute (cfg.presentation['cite'], {mw.text.nowiki(options_t.class), text}));	-- when |ref=none or when namelist_t empty and |ref= is missing or is empty end

if OCinSoutput then															-- blanked when citation is 'empty' so don't bother to add boilerplate metadata span table.insert (render_t, utilities.substitute (cfg.presentation['ocins'], OCinSoutput));	-- format and append metadata to the citation end

local template_name = ('citation' == config.CitationClass) and 'citation' or 'cite ' .. (cfg.citation_class_map_t[config.CitationClass] or config.CitationClass); local template_link =  .. template_name .. ; local msg_prefix = ' : ';

if 0 ~= #z.error_msgs_t then mw.addWarning (utilities.substitute (cfg.messages.warning_msg_e, template_link));

table.insert (render_t, ' ');											-- insert a space between citation and its error messages table.sort (z.error_msgs_t);											-- sort the error messages list; sorting includes wrapping and tags; hidden-error sorts ahead of visible-error

local hidden = true;													-- presume that the only error messages emited by this template are hidden for _, v in ipairs (z.error_msgs_t) do									-- spin through the list of error messages if v:find ('cs1-visible-error', 1, true) then						-- look for the visible error class name hidden = false;													-- found one; so don't hide the error message prefix break;															-- and done because no need to look further end end

z.error_msgs_t[1] = table.concat ({utilities.error_comment (msg_prefix, hidden), z.error_msgs_t[1]});	-- add error message prefix to first error message to prevent extraneous punctuation table.insert (render_t, table.concat (z.error_msgs_t, '; '));			-- make a big string of error messages and add it to the rendering end

if 0 ~= #z.maint_cats_t then mw.addWarning (utilities.substitute (cfg.messages.warning_msg_m, template_link));

table.sort (z.maint_cats_t);											-- sort the maintenance messages list

local maint_msgs_t = {};												-- here we collect all of the maint messages

if 0 == #z.error_msgs_t then											-- if no error messages table.insert (maint_msgs_t, msg_prefix);							-- insert message prefix in maint message livery end for _, v in ipairs( z.maint_cats_t ) do									-- append maintenance categories table.insert (maint_msgs_t, 										-- assemble new maint message and add it to the maint_msgs_t table				table.concat ({v, ' (', utilities.substitute (cfg.messages[':cat wikilink'], v), ')'})				); end table.insert (render_t, utilities.substitute (cfg.presentation['hidden-maint'], table.concat (maint_msgs_t, ' ')));	-- wrap the group of maint messages with proper presentation and save end

if not no_tracking_cats then local sort_key; local cat_wikilink = 'cat wikilink'; if cfg.enable_sort_keys then											-- when namespace sort keys enabled local namespace_number = mw.title.getCurrentTitle.namespace;		-- get namespace number for this wikitext sort_key = (0 ~= namespace_number and (cfg.name_space_sort_keys[namespace_number] or cfg.name_space_sort_keys.other)) or nil;	-- get sort key character; nil for mainspace cat_wikilink = (not sort_key and 'cat wikilink') or 'cat wikilink sk';	-- make <cfg.messages> key end

for _, v in ipairs (z.error_cats_t) do									-- append error categories table.insert (render_t, utilities.substitute (cfg.messages[cat_wikilink], {v, sort_key})); end for _, v in ipairs (z.maint_cats_t) do									-- append maintenance categories table.insert (render_t, utilities.substitute (cfg.messages[cat_wikilink], {v, sort_key})); end

for _, v in ipairs (z.prop_cats_t) do									-- append properties categories table.insert (render_t, utilities.substitute (cfg.messages['cat wikilink'], v));	-- no sort keys end end

return table.concat (render_t);												-- make a big string and done end

--[[--< V A L I D A T E >--

Looks for a parameter's name in one of several whitelists.

Parameters in the whitelist can have three values: true - active, supported parameters false - deprecated, supported parameters nil - unsupported parameters ]]

local function validate (name, cite_class, empty) local name = tostring (name); local enum_name;															-- parameter name with enumerator (if any) replaced with '#' local state; local function state_test (state, name)										-- local function to do testing of state values if true == state then return true; end									-- valid actively supported parameter if false == state then if empty then return nil; end										-- empty deprecated parameters are treated as unknowns deprecated_parameter (name);										-- parameter is deprecated but still supported return true; end if 'tracked' == state then local base_name = name:gsub ('%d', '');								-- strip enumerators from parameter names that have them to get the base name utilities.add_prop_cat ('tracked-param', {base_name}, base_name);	-- add a properties category; <base_name> modifies return true; end return nil; end

if name:find ('#') then														-- # is a cs1|2 reserved character so parameters with # not permitted return nil; end -- replace enumerator digit(s) with # (|last25= becomes |last#=) (mw.ustring because non-Western 'local' digits) enum_name = mw.ustring.gsub (name, '%d+$', '#');							-- where enumerator is last charaters in parameter name (these to protect |s2cid=) enum_name = mw.ustring.gsub (enum_name, '%d+([%-l])', '#%1');				-- where enumerator is in the middle of the parameter name; |author#link= is the oddity

if 'document' == cite_class then											-- special case for state = whitelist.document_parameters_t[enum_name];						-- this list holds enumerated and nonenumerated parameters if true == state_test (state, name) then return true; end return false; end

if utilities.in_array (cite_class, whitelist.preprint_template_list_t) then	-- limited parameter sets allowed for these templates state = whitelist.limited_parameters_t[enum_name];						-- this list holds enumerated and nonenumerated parameters if true == state_test (state, name) then return true; end

state = whitelist.preprint_arguments_t[cite_class][name];				-- look in the parameter-list for the template identified by cite_class if true == state_test (state, name) then return true; end

return false;															-- not supported because not found or name is set to nil end																			-- end limited parameter-set templates

if utilities.in_array (cite_class, whitelist.unique_param_template_list_t) then 	-- template-specific parameters for templates that accept parameters from the basic argument list state = whitelist.unique_arguments_t[cite_class][name];					-- look in the template-specific parameter-lists for the template identified by cite_class if true == state_test (state, name) then return true; end end																			-- if here, fall into general validation

state = whitelist.common_parameters_t[enum_name];							-- all other templates; all normal parameters allowed; this list holds enumerated and nonenumerated parameters if true == state_test (state, name) then return true; end

return false;																-- not supported because not found or name is set to nil end

--[=[-< I N T E R _ W I K I _ C H E C K >--

check for inter-language interwiki-link markup. must be a MediaWiki-recognized language code. when these values have the form (without leading colon): label return label as plain-text :link return :link as plain-text

return value as is else

]=]

local function inter_wiki_check (parameter, value) local prefix = value:match ('%[%[(%a+):');									-- get an interwiki prefix if one exists local _; if prefix and cfg.inter_wiki_map[prefix:lower] then						-- if prefix is in the map, needs preceding colon so		utilities.set_message ('err_bad_paramlink', parameter);					-- emit an error message _, value, _ = utilities.is_wikilink (value);							-- extract label portion from wikilink end return value; end

--[[--< M I S S I N G _ P I P E _ C H E C K >--

Look at the contents of a parameter. If the content has a string of characters and digits followed by an equal sign, compare the alphanumeric string to the list of cs1|2 parameters. If found, then the string is possibly a parameter that is missing its pipe. There are two tests made: -- the first parameter has a value and whitespace separates that value from the missing pipe parameter name -- the first parameter has no value (whitespace after the first = is trimmed by MediaWiki) cs1|2 shares some parameter names with XML/HTML attributes: class=, title=, etc. To prevent false positives XML/HTML tags are removed before the search.

If a missing pipe is detected, this function adds the missing pipe maintenance category.

]]

local function missing_pipe_check (parameter, value) local capture; value = value:gsub ('%b<>', '');											-- remove XML/HTML tags because attributes: class=, title=, etc.

capture = value:match ('%s+(%a[%w%-]+)%s*=') or value:match ('^(%a[%w%-]+)%s*=');	-- find and categorize parameters with possible missing pipes if capture and validate (capture) then										-- if the capture is a valid parameter name utilities.set_message ('err_missing_pipe', parameter); end end

--[[--< H A S _ E X T R A N E O U S _ P U N C T >--

look for extraneous terminal punctuation in most parameter values; parameters listed in skip table are not checked

]]

local function has_extraneous_punc (param, value) if 'number' == type (param) then return; end param = param:gsub ('%d+', '#');											-- enumerated name-list mask params allow terminal punct; normalize if cfg.punct_skip[param] then return;																	-- parameter name found in the skip table so done end if value:match ('[,;:]$') then utilities.set_message ('maint_extra_punct');							-- has extraneous punctuation; add maint cat end if value:match ('^=') then													-- sometimes an extraneous '=' character appears ... utilities.set_message ('maint_extra_punct');							-- has extraneous punctuation; add maint cat end end

--[[--< H A S _ E X T R A N E O U S _ U R L >--

look for extraneous url parameter values; parameters listed in skip table are not checked

]]

local function has_extraneous_url (url_param_t) local url_error_t = {}; check_for_url (url_param_t, url_error_t);									-- extraneous url check if 0 ~= #url_error_t then													-- non-zero when there are errors table.sort (url_error_t); utilities.set_message ('err_param_has_ext_link', {utilities.make_sep_list (#url_error_t, url_error_t)});	-- add this error message end end

--[[--< C I T A T I O N >--

This is used by templates such as to create the actual citation text.

]]

local function citation(frame) Frame = frame;																-- save a copy in case we need to display an error message in preview mode

local config = {};															-- table to store parameters from the module for k, v in pairs( frame.args ) do											-- get parameters from the frame config[k] = v; --	args[k] = v;															-- crude debug support that allows us to render a citation from module ; skips parameter validation; TODO: keep? end -- i18n: set the name that your wiki uses to identify sandbox subpages from sandbox template invoke (or can be set here) local sandbox = ((config.SandboxPath and '' ~= config.SandboxPath) and config.SandboxPath) or '/sandbox';	-- sandbox path from is_sandbox = nil ~= string.find (frame:getTitle, sandbox, 1, true);		-- is this invoke the sandbox module? sandbox = is_sandbox and sandbox or '';										-- use i18n sandbox to load sandbox modules when this module is the sandox; live modules else

local pframe = frame:getParent local styles; cfg = mw.loadData ('Module:Citation/CS1/Configuration' .. sandbox);			-- load sandbox versions of support modules when ; live modules else whitelist = mw.loadData ('Module:Citation/CS1/Whitelist' .. sandbox); utilities = require ('Module:Citation/CS1/Utilities' .. sandbox); validation = require ('Module:Citation/CS1/Date_validation' .. sandbox); identifiers = require ('Module:Citation/CS1/Identifiers' .. sandbox); metadata = require ('Module:Citation/CS1/COinS' .. sandbox); styles = 'Module:Citation/CS1' .. sandbox .. '/styles.css';

utilities.set_selected_modules (cfg);										-- so that functions in Utilities can see the selected cfg tables identifiers.set_selected_modules (cfg, utilities);							-- so that functions in Identifiers can see the selected cfg tables and selected Utilities module validation.set_selected_modules (cfg, utilities);							-- so that functions in Date validataion can see selected cfg tables and the selected Utilities module metadata.set_selected_modules (cfg, utilities);								-- so that functions in COinS can see the selected cfg tables and selected Utilities module

z = utilities.z;															-- table of error and category tables in Module:Citation/CS1/Utilities

is_preview_mode = not utilities.is_set (frame:preprocess (''));

local args = {};															-- table where we store all of the template's arguments local suggestions = {};														-- table where we store suggestions if we need to loadData them local error_text;															-- used as a flag

local capture;																-- the single supported capture when matching unknown parameters using patterns local empty_unknowns = {};													-- sequence table to hold empty unknown params for error message listing for k, v in pairs( pframe.args ) do											-- get parameters from the parent (template) frame v = mw.ustring.gsub (v, '^%s*(.-)%s*$', '%1');							-- trim leading/trailing whitespace; when v is only whitespace, becomes empty string if v ~= '' then if ('string' == type (k)) then k = mw.ustring.gsub (k, '%d', cfg.date_names.local_digits);		-- for enumerated parameters, translate 'local' digits to Western 0-9 end if not validate( k, config.CitationClass ) then if type (k) ~= 'string' then									-- exclude empty numbered parameters if v:match("%S+") ~= nil then error_text = utilities.set_message ('err_text_ignored', {v}); end elseif validate (k:lower, config.CitationClass) then error_text = utilities.set_message ('err_parameter_ignored_suggest', {k, k:lower});	-- suggest the lowercase version of the parameter else if nil == suggestions.suggestions then						-- if this table is nil then we need to load it suggestions = mw.loadData ('Module:Citation/CS1/Suggestions' .. sandbox);	--load sandbox version of suggestion module when ; live module else end for pattern, param in pairs (suggestions.patterns) do		-- loop through the patterns to see if we can suggest a proper parameter capture = k:match (pattern);							-- the whole match if no capture in pattern else the capture if a match if capture then											-- if the pattern matches param = utilities.substitute (param, capture);		-- add the capture to the suggested parameter (typically the enumerator) if validate (param, config.CitationClass) then		-- validate the suggestion to make sure that the suggestion is supported by this template (necessary for limited parameter lists) error_text = utilities.set_message ('err_parameter_ignored_suggest', {k, param});	-- set the suggestion error message else error_text = utilities.set_message ('err_parameter_ignored', {k});	-- suggested param not supported by this template v = '';											-- unset end end end if not utilities.is_set (error_text) then					-- couldn't match with a pattern, is there an explicit suggestion? if (suggestions.suggestions[ k:lower ] ~= nil) and validate (suggestions.suggestions[ k:lower ], config.CitationClass) then utilities.set_message ('err_parameter_ignored_suggest', {k, suggestions.suggestions[ k:lower ]}); else utilities.set_message ('err_parameter_ignored', {k}); v = '';												-- unset value assigned to unrecognized parameters (this for the limited parameter lists) end end end end

args[k] = v;														-- save this parameter and its value

elseif not utilities.is_set (v) then									-- for empty parameters if not validate (k, config.CitationClass, true) then				-- is this empty parameter a valid parameter k = ('' == k) and '(empty string)' or k;						-- when k is empty string (or was space(s) trimmed to empty string), replace with descriptive text table.insert (empty_unknowns, utilities.wrap_style ('parameter', k));	-- format for error message and add to the list end -- crude debug support that allows us to render a citation from module TODO: keep? --	elseif args[k] ~= nil or (k == 'postscript') then						-- when args[k] has a value from frame (we don't normally do that) --		args[k] = v;														-- overwrite args[k] with empty string from pframe.args[k] (template frame); v is empty string here end																		-- not sure about the postscript bit; that gets handled in parameter validation; historical artifact? end

if 0 ~= #empty_unknowns then												-- create empty unknown error message utilities.set_message ('err_param_unknown_empty', {			1 == #empty_unknowns and '' or 's',			utilities.make_sep_list (#empty_unknowns, empty_unknowns)			}); end

local url_param_t = {};

for k, v in pairs( args ) do		if 'string' == type (k) then											-- don't evaluate positional parameters has_invisible_chars (k, v);											-- look for invisible characters end has_extraneous_punc (k, v);												-- look for extraneous terminal punctuation in parameter values missing_pipe_check (k, v);												-- do we think that there is a parameter that is missing a pipe? args[k] = inter_wiki_check (k, v);										-- when language interwiki-linked parameter missing leading colon replace with wiki-link label

if 'string' == type (k) and not cfg.url_skip[k] then					-- when parameter k is not positional and not in url skip table url_param_t[k] = v;													-- make a parameter/value list for extraneous url check end end

has_extraneous_url (url_param_t);											-- look for url in parameter values where a url does not belong

return table.concat ({		frame:extensionTag ('templatestyles', '', {src=styles}),		citation0( config, args)	}); end

----< E X P O R T E D  F U N C T I O N S >--

return {citation = citation};