Module:London Gazette util

-- this module is created to support

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

local span_open = ' '; local code_open = ' %s ', span_open, code_open, help_link); local duplicate_page_error = mw.ustring.format (' %smore than one of %s&#124;page= and %s&#124;pages= %s ', span_open, code_open, code_open, help_link);

local p = {}

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

Whether variable is set or not. A variable is set when it is not nil and not empty.

]]

local function is_set( var ) return not (var == nil or var == ''); end

--[[--< O R D I N A L _ S U F F I X >--

render a numerical text string in ordinal form suitable for English language use. In this module, num_str is limited by calling functions to the integer values 1-99. The argument num_str must be known to be set before this function is called.

]]

local function ordinal_suffix (num_str) local lsd;																	-- least significant digit local suffixes = {['1'] = 'st', ['2'] = 'nd', ['3'] = 'rd'};				-- table of suffixes except 'th'

if num_str:match ('^1[1-3]$') then											-- check the 11-13 odd balls first to get them out of the way return num_str .. 'th';													-- 11th, 12th, 13th end lsd = num_str:match ('^%d?(%d)$');											-- all other numbers: get the least significant digit return num_str .. (suffixes[lsd] or 'th');									-- append the suffix from the suffixes table or default to 'th' end

--[[--< M A K E _ P A G E _ P A R A M >

Determine the value to be assigned to the specified cs1|2 |page= or |pages= parameter in. The arguments |param=page and |param=pages specify which of the cs1|2 parameters |page= or |pages= for which this function is to create a value.

This function inspects the content of the |page= and |pages= parameters, along with the |param= specifier. From this information it creates a value appropriate for the specified |page= or |pages= parameter. Only one will have a value, the other will get an empty string.

This function is called twice from ; once for each of cs1 |page= and |pages= parameters: |page= |pages=

except for the lvalue and the rvalue assigned to |param=, the two calls must be identical else odd results.


 * page= or |pages= without a comma, hyphen, or en dash separator → cs1 |page=
 * page= or |pages= with a separator → cs1 |pages=

Hyphen separator characters are converted to en dash characters. Any white space around hyphen and en dash separators is removed.

If both |page= and |pages= are set, this function mimics cs1|2 and chooses |page=.

Another function, page_error is required for error messaging because we don't want to dump css markup into a parameter value that will be included in the cs1|2 metadata.

]]

function p.make_page_param (frame) local args = getArgs(frame); local page_or_pages;

page_or_pages = args.page or args.unnamed or args.pages;					-- only one; prefer |page= if is_set (page_or_pages) then if 'pages' == args.param then if page_or_pages:match ('[,%-–]') then								-- only for |pages= parameter page_or_pages = mw.ustring.gsub (page_or_pages, '%s*[%-–]%s*', '–');	-- hyphen to en dash; remove spaces return page_or_pages;											-- has separator character so make the parameter |pages= else return '';														-- no separator so value will be assigned to |page= end elseif 'page' == args.param then if page_or_pages:match ('[,%-–]') then								-- only for |pages= parameter return '';														-- has separator so value will be assigned to |pages= else return page_or_pages;											-- no separator character so make the parameter |page= end else return '';															-- |param= something else end end

return '';																	-- if here no pagination or not correct |page= or |pages= parameter end

--[[--< P A G E _ E R R O R >--

Inspect page number parameters and return an error message that will be appended to the end of the template rendering. Error messages are handled this way so that the error message is not made part of the cs1|2 citation's metadata.

]]

function p.page_error (frame) local args = getArgs(frame);

if is_set (args.page) and is_set (args.pages) then return duplicate_page_error;											-- both of |page= and |pages= are set else return ''; end end

--[[--< T Y P E _ P A R A M >--

set the value that is assigned to the cite magazine |type= parameter using the values of the London Gazette
 * supp= and |display-supp= parameters

Only limited |supp= values will set the type value. These are: 'y' or a number 1-99.

row numbers in comments apply to the table in Template_talk:London_Gazette#Rewrite_as_wrapper_around_template:cite_news

]]

function p.type_param (frame) local args = getArgs(frame); if not is_set (args['display-supp']) and not is_set (args.supp) then		-- when both |display-supp= and |supp= are not set return '';																-- [row 1] not a supplement so no display end args.supp = args.supp and args.supp:lower;								-- make text values lower case

if not is_set (args['display-supp']) and is_set (args.supp) then			-- when only |supp= is set if 'y' == args.supp then return 'Supplement';												-- [row 2] the first or only supplement elseif args.supp:match ('^%d%d?$') then									-- one or two digits return ordinal_suffix (args.supp) .. ' supplement';				-- [row 3] for the 1st-99th supplement else return supp_error;													-- [row 4] any other text not supported show an error message end end

if is_set (args['display-supp']) and not is_set (args.supp) then			-- when only |display-supp= is set if args['display-supp']:match ('^%d%d?$') then							-- one or two digits return ordinal_suffix (args['display-supp']) .. ' supplement';		-- [row 7] for the 1st-99th supplement elseif 'y' == args['display-supp'] then return 'Supplement';												-- [row 6] unnumbered supplement in /page/ space else return args['display-supp'];										-- [row 11] user specified text; supplement is not in supplement space (a Gazette website error) end end -- here when both |display-supp= and |supp= are set if args['display-supp']:match ('^%d%d?$') then								-- supplement number if 'y' == args.supp or (args['display-supp'] == args.supp) then return ordinal_suffix (args['display-supp']) .. ' supplement';		-- [rows 8, 9] else																	-- |supp= is not a number or number isn't same as number in |display-supp= return supp_error;													-- [row 10] different values are ambiguous end else																		-- not a supplement number if ('y' == args.supp) and ('none' == args['display-supp']) then return '';															-- [row 5] for the case when a /page/ is in /supplement/ space elseif ('y' == args.supp) or args.supp:match ('^%d%d?$') or not is_set (args.supp) then return args['display-supp'];										-- [rows 12, 13] user specified text else return supp_error;													-- [row 14] any other |supp= value not supported show an error message end end end

--[[--< U R L _ C I T Y >--

sets the city element of the url path according to |city= value; defaults to London

]]

local function url_city (city_param) local city_names = {['b'] = 'Belfast', ['belfast'] = 'Belfast', ['e'] = 'Edinburgh', ['edinburgh'] = 'Edinburgh'}; city_param = city_param and city_param:lower;								-- lower to index into the city_names table

return city_names[city_param] or 'London';									-- the city, or default to London end

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

sets the page number element of the url path according to |page= or |pages=, and the value assigned to |supp= parameter. This function assumes that supplements may have page numbering that are digits prefixed with one or two letters: B1, B41, RH2, etc; also assumes that regular issues have digit-only page numbers.

Only limited |supp= values will set the page number path element. These are: 'y' or a number 1-99.

From issue 1610–1619 the gazette has both digit page numbers and digit + alpha page numbers. It appears that the issue numbers did not advance properly in this period so the website has page numbers like '1.a' and '3.a.a' plus the usual digit page number '1', '3', etc for all of issues 1610–1619. There were no supplements during this period so this function handles the 1610–1619 issues separately. The alpha character is always 'a' and is always separated from the digits and other alpha by a dot.

]]

local function url_page (page, supp, issue) issue = tonumber (issue);													-- for issues 1610–1619 comparison if issue and (6610 <= issue and 6619 >= issue) then							-- if one of these oddball issues with numeric + alpha page numbers (~ Sep–Oct 1727) return page:match ('^%d+%.?[a%.]+');									-- there are no supplements in this range so we're done end if is_set (supp) then														-- all other issues if ('y' == supp) or supp:match ('^%d%d?$') then page = page:match ('^%a?%a?%d+');									-- one or two letters followed by digits or just digits (supplement to issue 61608) else page = page:match ('^%d+');											-- |supp= set to an unexpected value, so one or more digits only end else page = page:match ('^%d+');												-- |supp= not set, so one or more digits only end return page or '';															-- at minimum return empty string for concatenation end

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

sets the page/supplement element of the url path according to |supp= value; defaults to page

Only limited |supp= values will set the page/supplement path element to /supplement/. These are: 'y' or a number 1-99

]]

local function url_page_or_supplement (supp_param) supp_param = (supp_param and supp_param:lower) or '';						--make sure lower case for comparisons if ('y' == supp_param) or supp_param:match ('^%d%d?$') then return 'supplement'; else return 'page';															-- anything else end end

--[[--< U R L _ P A R A M >

Build a url given |city=, |issue=, |supp=, and one of |page= or |pages=; result is assigned to |url=


 * url=

]]

function p.url_param (frame) local args = getArgs(frame); local pg = args.page or args.pages or '';									-- first set parameter or empty string

local url_table = {															-- a table of the various url parts 'https://www.thegazette.co.uk',											-- static domain name url_city (args.city),													-- default to London 'issue',																-- static path text args.issue,																-- issue number url_page_or_supplement (args.supp),										-- either of /page/ or /supplement/ according to the state of |supp= url_page (pg, args.supp, args.issue)									-- pages: digits only; supplements: optional letter followed by 1 or more digits };	return table.concat (url_table, '/');										-- concatenate all of the parts together and done end

return p;