Module:Footnotes

require('strict'); local getArgs = require ('Module:Arguments').getArgs;

--[[--< A R G S _ D E F A U L T >--

a table to specify initial values.

]]

local args_default = { bracket_left = '', bracket_right = '', bracket_year_left = '', bracket_year_right = '', postscript = '', page = '', pages = '', location = '', page_sep = ", p. ", pages_sep = ", pp. ", ref = '', template = 'harv',															-- if template name not provided in use this };

--[[--< T A R G E T _ C H E C K >--

look for anchor_id (CITEREF name-list and year or text from |ref=) in anchor_id_list

the 'no target' error may be suppressed with |ignore-err=yes when target cannot be found because target is inside a template that wraps another template; 'multiple targets' error may not be suppressed

]]

local function target_check (anchor_id, args) local namespace = mw.title.getCurrentTitle.namespace; local anchor_id_list_module = mw.loadData ('Module:Footnotes/anchor_id_list'); local anchor_id_list = anchor_id_list_module.anchor_id_list; local article_whitelist = anchor_id_list_module.article_whitelist; local template_list = anchor_id_list_module.template_list; local whitelist_module = mw.loadData ('Module:Footnotes/whitelist'); local whitelist = whitelist_module.whitelist; local special_patterns = whitelist_module.special_patterns; local DNB_special_patterns = whitelist_module.DNB_special_patterns; local DNB_template_names = whitelist_module.DNB_template_names;

if 10 == namespace then return '';																-- automatic form of |no-tracking=yes; TODO: is this too broad? end

local tally = anchor_id_list[anchor_id];									-- nil when anchor_id not in list; else a tally local msg; local category;

if not tally then if args.ignore then return '';															-- if ignore is true then no message, no category end if article_whitelist and article_whitelist[anchor_id] then				-- if an article-local whitelist and anchor ID is in it			return '';															-- done end local wl_anchor_id = anchor_id;											-- copy to be modified to index into the whitelist if args.year then														-- for anchor IDs created by this template (not in |ref=) that have a date if args.year:match ('%d%l$') or										-- use the date value to determine if we should remove the disambiguator args.year:match ('n%.d%.%l$') or				args.year:match ('nd%l$') then wl_anchor_id = wl_anchor_id:gsub ('%l$', '');				-- remove the disambiguator end end

local t_tbl = whitelist[wl_anchor_id];									-- get list of templates associated with this anchor ID

if t_tbl then															-- when anchor ID not whitelisted t_tbl is nil for _, t in ipairs (t_tbl) do										-- spin through the list of templates associated with this anchor ID				if template_list[t] then										-- if associated template is found in the list of templates in the article return '';													-- anchor ID is whitlisted and article has matching template so no error end end end

for _, pattern in ipairs (special_patterns) do							-- spin through the spcial patterns and try to match if anchor_id:match (pattern) then return ''; end end

for _, dnb_t in ipairs (DNB_template_names or {}) do					-- getting desparate now, are there any DNB templates? DNB_template_names may be nil; empty table prevents script error if template_list[dnb_t] then										-- if the article has this DNB template for _, pattern in ipairs (DNB_special_patterns) do				-- spin through the DNB-specifiec wildcard patterns if anchor_id:match (pattern) then							-- and attempt a match return '';												-- found a match end end end end

msg = 'no target: ' .. anchor_id;										-- anchor_id not found category = '';

elseif 1 < tally then msg = 'multiple targets (' .. tally .. '×): ' .. anchor_id;				-- more than one anchor_id in this article category = 0 == namespace and  or ;								-- only categorize in article space return ' ' .. args.template .. ' error: ' .. msg .. ' (help) ' .. category; end

--	category = 0 == namespace and  or ;	-- only categorize in article space category = 0 == namespace and category or '';								-- only categorize in article space

--use this version to show error messages --	return msg and ' ' .. args.template .. ' error: ' .. msg .. ' (help) ' .. category or ''; --use this version to hide error messages return msg and ' ' .. args.template .. ' error: ' .. msg .. ' (help) ' .. category or '';

end

--[[--< I S _ Y E A R >

evaluates param to see if it is one of these forms with or without lowercase letter disambiguator: YYYY n.d.	nd c. YYYY YYYY–YYYY	(separator is endash) YYYY–YY		(separator is endash)

return true when param has a recognized form; false else

]]

local patterns_date= { '^%d%d%d%d?%l?$', '^n%.d%.%l?$', '^nd%l?$', '^c%. %d%d%d%d?%l?$', '^%d%d%d%d–%d%d%d%d%l?$', '^%d%d%d%d–%d%d%l?$', }

local function is_year (param, args) args.year = '';																-- used for harv error; for _, pattern in ipairs (patterns_date) do		if mw.ustring.match (param, pattern) then args.year = param;													-- used for harv error; return true; end end end

--[[--< C O R E >--

returns an anchor link (CITEREF) formed from one to four author names, year, and insource location (|p=, |pp=, loc=)

]]

local function core( args ) local result; local err_msg = ''

if args.P5 ~= '' then if is_year (args.P5, args) then result = table.concat ({args.P1, ' et al. ', args.bracket_year_left, args.P5, args.bracket_year_right}); else args.P5 = '';														-- when P5 not a year don't include in anchor result = table.concat ({args.P1, ' et al.'});						-- and don't render it		end

elseif args.P4 ~= '' then if is_year (args.P4, args) then result = table.concat ({args.P1, ', ', args.P2, ' &amp; ', args.P3, ' ', args.bracket_year_left, args.P4, args.bracket_year_right});	-- three names and a year else result = table.concat ({args.P1, ' et al.'});						-- four names end

elseif args.P3 ~= '' then if is_year (args.P3, args) then result = table.concat ({args.P1, ' &amp; ', args.P2, ' ', args.bracket_year_left, args.P3, args.bracket_year_right});	-- two names and a year else result = table.concat ({args.P1, ', ', args.P2, ' ', ' &amp; ', args.P3});	-- three names end elseif args.P2 ~= '' then if is_year (args.P2, args) then result = table.concat ({args.P1, ' ', args.bracket_year_left, args.P2, args.bracket_year_right});	-- one name and year else result = table.concat ({args.P1, ' &amp; ', args.P2});				-- two names end else result = args.P1;														-- one name end -- when author-date result ends with a dot (typically when the last positional parameter holds 'n.d.') -- and when no in-source location (no |p=, |pp=, or |loc=) -- and when the first or only character in args.postscript is a dot -- remove the author-date result trailing dot -- the author-date result trailing dot will be replaced later with the content of args.postscript (usually a dot) if ('.' == result:sub(-1)) and ('.' == args.postscript:sub(1)) and ( == args.page) and ( == args.pages) and ('' == args.location) then result = result:gsub ('%.$', ''); end if args.ref ~= 'none' then local anchor_id; if args.ref ~= '' then anchor_id = mw.uri.anchorEncode (args.ref); err_msg = target_check (anchor_id, args); result = table.concat ({, result, }); else anchor_id = mw.uri.anchorEncode (table.concat ({'CITEREF', args.P1, args.P2, args.P3, args.P4, args.P5})); err_msg = target_check (anchor_id, args); result = table.concat ({, result, }); end end

if args.page ~= '' then result = table.concat ({result, args.page_sep, args.page}); elseif args.pages ~= ''then result = table.concat ({result, args.pages_sep, args.pages}); end

if args.location ~= '' then result = table.concat ({result, ', ', args.location}); end

result = table.concat ({args.bracket_left, result, args.bracket_right, args.postscript}):gsub ('%s+', ' ');		-- strip redundant spaces return result .. err_msg; end

--[[--< H Y P H E N _ T O _ D A S H >--

Converts a hyphen to a dash under certain conditions. The hyphen must separate like items; unlike items are returned unmodified. These forms are modified: letter - letter (A - B)	digit - digit (4-5) digit separator digit - digit separator digit (4.1-4.5 or 4-1-4-5) letterdigit - letterdigit (A1-A5) (an optional separator between letter and		digit is supported – a.1-a.5 or a-1-a-5) digitletter - digitletter (5a - 5d) (an optional separator between letter and		digit is supported – 5.a-5.d or 5-a-5-d)

any other forms are returned unmodified.

str may be a comma- or semicolon-separated list

This code copied from Module:Citation/CS1. The only modification is to require Module:Citation/CS1/Utilities so that it has access to the functions is_set and has_accept_as_written

]]

local function hyphen_to_dash( str ) local utilities = require ('Module:Citation/CS1/Utilities');				-- only modification so that this function has access to is_set and has_accept_as_written

if not utilities.is_set (str) then return str; end

local accept; -- Boolean

str = str:gsub ('&[nm]dash;', {['–'] = '–', ['&mdash;'] = '—'});		-- replace &mdash; and – entities with their characters; semicolon mucks up the text.split str = str:gsub ('&#45;', '-'); -- replace HTML numeric entity with hyphen character

str = str:gsub (' ', ' '); -- replace  entity with generic keyboard space character local out = {}; local list = mw.text.split (str, '%s*[,;]%s*');								-- split str at comma or semicolon separators if there are any

for _, item in ipairs (list) do												-- for each item in the list item, accept = utilities.has_accept_as_written (item);					-- remove accept-this-as-written markup when it wraps all of item if not accept and mw.ustring.match (item, '^%w*[%.%-]?%w+%s*[%-–—]%s*%w*[%.%-]?%w+$') then	-- if a hyphenated range or has endash or emdash separators if item:match ('^%a+[%.%-]?%d+%s*%-%s*%a+[%.%-]?%d+$') or			-- letterdigit hyphen letterdigit (optional separator between letter and digit) item:match ('^%d+[%.%-]?%a+%s*%-%s*%d+[%.%-]?%a+$') or			-- digitletter hyphen digitletter (optional separator between digit and letter) item:match ('^%d+[%.%-]%d+%s*%-%s*%d+[%.%-]%d+$') or			-- digit separator digit hyphen digit separator digit item:match ('^%d+%s*%-%s*%d+$') or								-- digit hyphen digit item:match ('^%a+%s*%-%s*%a+$') then							-- letter hyphen letter item = item:gsub ('(%w*[%.%-]?%w+)%s*%-%s*(%w*[%.%-]?%w+)', '%1–%2');	-- replace hyphen, remove extraneous space characters else item = mw.ustring.gsub (item, '%s*[–—]%s*', '–');				-- for endash or emdash separated ranges, replace em with en, remove extraneous whitespace end end table.insert (out, item);												-- add the (possibly modified) item to the output table end

local temp_str = '';														-- concatenate the output table into a comma separated string temp_str, accept = utilities.has_accept_as_written (table.concat (out, ', ')); -- remove accept-this-as-written markup when it wraps all of concatenated out if accept then temp_str = utilities.has_accept_as_written (str);						-- when global markup removed, return original str; do it this way to suppress boolean second return value return temp_str; else return temp_str;														-- else, return assembled temp_str end end

--[[--< A R G S _ F E T C H >-

Because all of the templates share a common set of parameters, a single common function to fetch those parameters from frame and parent frame.

]]

local function args_fetch (frame, ps) local args = args_default;													-- create a copy of the default table local pframe = frame:getParent;											-- point to the template's parameter table

for k, v in pairs (frame.args) do											-- override defaults with values provided in the #invoke: if any args[k] = v; end args.postscript = pframe.args.postscript or pframe.args.ps or ps; if 'none' == args.postscript then args.postscript = ''; end args.page = pframe.args.p or pframe.args.page or ''; args.pages = pframe.args.pp or pframe.args.pages or ''; args.pages = ( ~= args.pages) and hyphen_to_dash (args.pages) or ; args.location = pframe.args.at or pframe.args.loc or ''; args.ref = pframe.args.ref or pframe.args.Ref or ''; args.ignore = ('yes' == pframe.args['ignore-false-positive']) or ('yes' == pframe.args['ignore-err']);

for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do						-- loop through the five positional parameters and trim if set else empty string args[v] = (pframe.args[i] and mw.text.trim (pframe.args[i])) or ''; end

if args.P5 and not is_year (args.P5, args) then local i = 6;															-- initialize the indexer to the sixth positional parameter while pframe.args[i] do													-- in case there are too many authors loop through the authors looking for a year local v = mw.text.trim (pframe.args[i]);							-- trim if is_year (v, args) then											-- if a year args.P5 = v;													-- overwrite whatever was in args.P5 with year break;															-- and abandon the search end i = i + 1;															-- bump the indexer end end return args; end

--[[--< H A R V A R D _ C I T A T I O N >--

common entry point for: aka aka aka

Distinguishing features (brackets and page separators) are specified in this module's in the respective templates.

]]

local function harvard_citation (frame) local args = args_fetch (frame, '');										-- get the template and invoke parameters; default postscript is empty string

return core (args); end

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

used by sfn and sfnm. This function fixes an issue with reference tooltip gadget where the tooltip is not displayed when an insource locator (|p=, |pp=, |loc=) has an external wikilink that contains a # character

strip uri-reserved characters from urls in |p=, |pp-, and |loc= parameters The researved characters are: !#$&'*+,/:;=?@[] ]]

local function strip_url (pages) local escaped_uri; if not pages or ('' == pages) then return pages; end for uri in pages:gmatch ('%[(%a[%w%+%.%-]*://%S+)') do						-- for each external link get the uri escaped_uri = uri:gsub ("([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" );		-- save a copy with lua pattern characters escaped uri = uri:gsub ("[!#%$&'%(%)%*%+,/:;=%?@%[%]%.%%]", '');				-- remove reserved characters and '%' because '%20' (space character) is a lua 'invalid capture index' pages = pages:gsub (escaped_uri, uri, 1);								-- replace original uri with the stripped version end return pages; end

--[[--< S F N >

entry point for and

]]

local function sfn (frame) local args = args_fetch (frame, '.');										-- get the template and invoke parameters; default postscript is a dot

local result = core (args);													-- go make a CITEREF anchor -- put it all together and then strip redundant spaces local name = table.concat ({'FOOTNOTE', args.P1, args.P2, args.P3, args.P4, args.P5, strip_url (args.page), strip_url (args.pages), strip_url (args.location)}):gsub ('%s+', ' ');

return frame:extensionTag ({name='ref', args={name=name}, content=result});

end

--[[--< S F N M >--

common entry point for and

Distinguishing features (brackets) are specified in this module's in the respective templates.

]]

local function sfnm (frame) local args = args_default;													-- create a copy of the default table local pframe = frame:getParent;											-- point to the template's parameter table local n = 1;																-- index of source; this is the 'n' in na1, ny, etc local first_pnum = 1;														-- first of a pair of positional parameters local second_pnum = 2;														-- second of a pair of positional parameters

local last_ps = 0;															-- index of the last source with |nps= set local last_index = 0;														-- index of the last source; these used to determine which of |ps= or |nps= will terminate the whole rendering

local out = {};																-- table to hold rendered sources local footnote = {'FOOTNOTE'};												-- all author, date, insource location stuff becomes part of the reference's footnote id; added as we go

for k, v in pairs (frame.args) do											-- override defaults with values provided in the #invoke: if any args[k] = v; end while true do		if not pframe.args[table.concat ({n, 'a1'})] and not pframe.args[first_pnum] then break;																-- no na1 or matching positional parameter so done end if pframe.args[table.concat ({n, 'a1'})] then							-- does this source use named parameters? for _, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do				-- initialize for this source args[v] = ''; end

for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do				-- extract author and year parameters for this source args[v] = pframe.args[table.concat ({n, 'a', i})] or '';		-- attempt to assign author name if '' == args[v] then											-- when there wasn't an author name args[v] = pframe.args[table.concat ({n, 'y'})] or '';		-- attempt to assign year break;														-- done with author/date for this source end end

else																	-- this source uses positional parameters args.P1 = mw.text.trim (pframe.args[first_pnum]);					-- yes, only one author supported args.P2 = (pframe.args[second_pnum] and mw.text.trim (pframe.args[second_pnum])) or '';	-- when positional author, year must also be positional

for _, v in ipairs ({'P3', 'P4', 'P5'}) do							-- blank the rest of these for this source args[v] = ''; end

first_pnum = first_pnum + 2;										-- source must use positional author and positional year second_pnum = first_pnum + 1;										-- bump these for possible next positional source end args.postscript = pframe.args[table.concat ({n, 'ps'})] or ''; if 'none' == args.postscript then										-- this for compatibility with other footnote templates; does nothing args.postscript = ''; end

args.ref = pframe.args[table.concat ({n, 'ref'})] or '';				-- alternate reference for this source

args.page = pframe.args[table.concat ({n, 'p'})] or '';					-- insource locations for this source args.pages = pframe.args[table.concat ({n, 'pp'})] or ''; args.pages = ( ~= args.pages) and hyphen_to_dash (args.pages) or ; args.location = pframe.args[table.concat ({n, 'loc'})] or pframe.args[table.concat ({n, 'at'})] or ''; args.ignore = ('yes' == pframe.args[table.concat ({n, 'ignore-false-positive'})]) or ('yes' == pframe.args[table.concat ({n, 'ignore-err'})]);

table.insert (out, core (args));										-- save the rendering of this source for k, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do					-- create the FOOTNOTE id			if '' ~= args[v] then table.insert (footnote, args[v]); end end for k, v in ipairs ({'page', 'pages', 'location'}) do					-- these done separately so that we can strip uri-reserved characters from extlinked page numbers if '' ~= args[v] then table.insert (footnote, strip_url (args[v])) end end last_index = n;															-- flags used to select terminal postscript from nps or from end_ps if '' ~= args.postscript then last_ps = n;		end n = n+1;																-- bump for the next one end local name = table.concat (footnote):gsub ('%s+', ' ');						-- put the footnote together and strip redundant space args.end_ps = pframe.args.postscript or pframe.args.ps or '.';				-- this is the postscript for the whole not for the individual sources if 'none' == args.end_ps then												-- not an original sfnm parameter value; added for compatibility with other footnote templates args.end_ps = ''; end

local result = table.concat ({table.concat (out, '; '), (last_index == last_ps) and '' or args.end_ps}); return frame:extensionTag ({name='ref', args={name=name}, content=result}); end

--[[--< S F N R E F >--

implements

]]

local function sfnref (frame) local args = getArgs (frame); local out = {}; for i=1, 5 do																-- get the first five args if there are five args if args[i] then out[i] = args[i]; else break;																-- less than 5 args break out end end if 5 == #out then															-- when we have seen five args there may bemore local i = 6;															-- initialize the indexer to the sixth positional parameter while args[i] do														-- in case there are too many authors loop through the authors looking for a year if is_year (args[i], args) then										-- if a year out[5] = args[i];												-- overwrite whatever was in args[5] with year break;															-- and abandon the search end i = i + 1;															-- bump the indexer end end return mw.uri.anchorEncode ('CITEREF' .. table.concat (out)); end

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

return { harvard_citation = harvard_citation, sfn = sfn, sfnm = sfnm, sfnref = sfnref, };