وحدة:Engvar

This module is allows an article to show a national variant of English (WP:ENGVAR) in templates, depending on the individual article preference. Basically, the article page infobox can have |engvar=en-GB set to show en-GB spellng.

For example, a single template can show "football" text in en-UK articles, and "soccer" in en-US articles.

Usage

See {{Engvar}}. 

{{#invoke:Engvar|variants
| defaultWord =
| engvar = {{{engvar|}}}<!-- Pass through article setting -->
| defaultLang =
| en-XX = <!-- Add country code for XX, and its word  -->
| en-YY = <!-- Add more variants as might be needed -->
| engvarCat = {{{engvarCat|}}}
| engvarCatSort =
}}
|engvar=

This input (user input) is checked against a list of possible words ("en-US, American English, United States"). Internal identifier is the code like "en-US".

|engvarCatSort=

Sort text for maintenance category. Advise to set to project name like "rainbow" not "infobox rainbow" (all templates will fill this category!). Default is pagename.

Maintenance category

Parameter list

In the 

| defaultWord =
| defaultLang =
| engvar = {{{engvar|}}}<!-- Pass through the editor's choice -->
| en-XX = <!-- add country code for XX, and the nation language word -->
| en-YY = <!-- add more variants as might be needed -->
| engvarCat = {{{engvarCat|}}} <!-- yes/no; '=no' will suppress message category in article page) -->

In the parameter list, for the editor to see & use: 

| engvar =
| engvarCat =

List of variant languages

In the template code only use the listed ISO-code as parameter name: |en-UK=vapour. The article editor has freedom to use the other options: |engvar=British.

Language ISO-code
American English en-US
Australian English en-AU
British English en-GB
Canadian English en-CA
Hiberno-English (Irish-English) en-EI
Hong Kong English en-HK
Indian English en-IN
Jamaican English en-JM
Malawian English en-MW
New Zealand English en-NZ
Nigerian English en-NG
Pakistani English en-PK
Philippine English en-PH
Scottish English en-SCO
Singapore English en-SG
South African English en-ZA
Trinidadian English en-TT
British English Oxford spelling
British (Oxford) English
Oxford English Dictionary (OED) 		en-OED
IUPAC spelling en-IUPAC 
-- This module implements Template:Engvar.
-- Template:Engvar is to be build into the template (like an infobox), with default & variant spellings defined.
-- That template should also allow parameter '|engvar=' for the editor (article page).
-- The module/template Engvar then returns the spelling variant as is set in that article (for example '|engvar=en-GB').
-- The defaultWord is returned, unless the engvar input hits on a defined (en-XX) variant word.
local p = {}
local getArgs = require('Module:Arguments').getArgs
local gsub = string.gsub
local lower = string.lower
local upper = string.upper

function p.variants(frame)
local args = getArgs(frame)
	return p._variants(args)
end

function p._variants(args)
local returnWord = nil

	local defaultWord = args.defaultWord or ''
	if args.engvar == nil then
		-- Nothing to look for; use defaultWord right away
		returnWord = defaultWord
	elseif args.defaultLang == gsub(lower(args.engvar), '^en%-(%w%w)$', formatISO) then
		-- By the defaultLang, the defaultWord is asked
		returnWord = defaultWord
	else
		returnWord = args[gsub(lower(args.engvar), '^en%-(%w%w)$', formatISO)]
	end

	if returnWord == nil then
		-- No hit so far. Search by words in the engvar entered, checking the list
		local useLang = engvarLang(args.engvar)
		if useLang == nil then
			returnWord = defaultWord .. addMaintCat(args)
		else
			returnWord = args[useLang] or defaultWord
		end
	end

	return returnWord
end

-- Returns arguments and intermediate result. Plus the template result, in front.
function p.explain(frame)
local args = getArgs(frame)
local ret = {}
	table.insert(ret, '\n\n: Settings:')
	table.insert(ret, 'defaultWord=' .. (args.defaultWord or '') .. '; ')
	table.insert(ret, 'defaultLang=' .. (args.defaultLang or '') .. '; ')
	table.insert(ret, 'engvarCat=' .. (args.engvarCat or '[default:yes]') .. '; ')
	table.insert(ret, 'engvarCatSort=' .. (args.engvarCatSort or ''))
	table.insert(ret, '\n\n: engvar=' .. (args.engvar or '') .. ' [input] ')
	local useLang = engvarLang(args.engvar or '')
	table.insert(ret, ' => Engvar code [used]: >' .. (useLang or '') .. '<.')
	
	for k, v in pairs(args) do
		if k == 'en-UK' then
			table.insert(ret, k .. ' ? better: use "en-GB"; ')
		elseif k == 'en-SA' then
			table.insert(ret, k .. ' ? misleading; use "en-ZA"; ')
		end
		
		if k == 'defaultWord' then
		elseif k == 'defaultLang' then
		elseif k == 'engvar' then
		elseif k == 'engvarcat' then
		elseif k == gsub(lower(k), '^en%-(%w%w)$', formatISO) then
			table.insert(ret, k .. '=' .. v .. '; ')
		else
			table.insert(ret, k .. ' [not standard:]=' .. v .. '; ')
		end

	end
	return (args.engvar or '') .. ' => ' .. p._variants(args) .. table.concat(ret, ' ')
end

-- Turn a match into pattern 'en-XX'
function formatISO(country)
	return ('en-' .. upper(country) or '')
end

function engvarLang(searchEngvar)
-- Search verbose language identifiers to ISO-format 'en-XX'
-- Assumed: not a blank string '' to seacrch
local match = string.match

	searchEngvar = gsub(searchEngvar, '^%s*en%-(.*)', '%1') -- rm any opening 'en-'.
	searchEngvar = gsub(lower(searchEngvar), '[%s%(%)%-]', '') -- To lc, remove all: (, ) , ws, hyphen.
	local useLang
	--Special codes
	if match(searchEngvar, 'oxford')
		or searchEngvar == 'oed' then
			useLang = 'en-OED' -- 'oxford' to catch before anyting 'british'
	elseif match(searchEngvar, 'iupac') then
			useLang = 'en-IUPAC' -- chemistry
	-- Very often used
	elseif match(searchEngvar, 'british')
		or searchEngvar == 'uk'
		or searchEngvar == 'gbr' then
			useLang = 'en-GB'
	elseif searchEngvar == 'us'
		or match(searchEngvar, 'unitedstates')
		or searchEngvar == 'american'
		or searchEngvar == 'usa' then
			useLang = 'en-US'
	elseif match(searchEngvar, 'australia')
		or searchEngvar == 'aus' then
			useLang = 'en-AU'
	-- Often used
	elseif match(searchEngvar, 'india')
		or searchEngvar == 'ind' then
			useLang = 'en-IN'
	elseif searchEngvar == 'newzealand'
		or searchEngvar == 'nzl' then
			useLang = 'en-NZ'
	elseif match(searchEngvar, 'southafrica') -- not: en-SA
		or searchEngvar == 'zaf' then
			useLang = 'en-ZA'
	elseif searchEngvar == 'canada'
		or searchEngvar == 'can' then
			useLang = 'en-CA'
	elseif match(searchEngvar, 'hiberno')
		or match(searchEngvar, 'ireland')
		or match(searchEngvar, 'irish')
		or searchEngvar == 'irl' then
			useLang = 'en-EI'
	elseif match(searchEngvar, 'hongkong')
		or searchEngvar == 'hkg' then
			useLang = 'en-HK'
	-- Less often used
	elseif match(searchEngvar, 'jamaica')
		or searchEngvar == 'jam' then
			useLang = 'en-JM'
	elseif match(searchEngvar, 'malawi')
		or searchEngvar == 'mwi' then
			useLang = 'en-MW'
	elseif match(searchEngvar, 'nigeria')
		or searchEngvar == 'nga' then
			useLang = 'en-NG'
	elseif match(searchEngvar, 'pakistan')
		or searchEngvar == 'pak' then
			useLang = 'en-PK'
	elseif match(searchEngvar, 'philippine')
		or searchEngvar == 'phl' then
			useLang = 'en-PH'
	elseif match(searchEngvar, 'scotland')
		or match(searchEngvar, 'scottish')
		or searchEngvar == 'sco' then
			useLang = 'en-SCO' -- Has no alpha-2 code; not 'scotch'
	elseif match(searchEngvar, 'singapore')
		or searchEngvar == 'sgp' then
			useLang = 'en-SG'
	elseif match(searchEngvar, 'trinidad')
		or match(searchEngvar, 'tobago')
		or searchEngvar == 'tto' then
			useLang = 'en-TT'
	else
		useLang = nil
	end
	
	return useLang
end

function addMaintCat(args)
local catMaintenance
	if args.engvarCat == 'no' then
	else
		local title = mw.title.getCurrentTitle()
		if title:inNamespaces(0) then  -- 0=main, 10=templ, 828=module
			if args.engvarCatSort then
				catMaintenance = '|' .. args.engvarCatSort .. ', ' .. title.text
			end
			catMaintenance = '[[Category:Articles using an unknown Template:Engvar option' .. (catMaintenance or '') .. ']]'
		end
	end
	return catMaintenance or ''
end

return p
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