Module:Languages

--[=[ Not globally exposed. Internal function only.

language_subpages( frame, transform, options ) Parameters frame:    The frame that was passed to the method invoked. The first argument or the page argument will be respected. transform: A transform function. Example: function( basepagename, subpagename, code, langname ) end options:  An object with options. Example: { abort= { on=function end, time=0.8 } } Following options are available: abort: Aborts iterating over the subpages if one of the conditions is met. If the process is aborted, nil is returned! on: Function to be called if an abort-condition was met. cycles: The maximum number of subpages to run over. time: Maximum time to spend running over the subpages. ]=] function language_subpages( frame, transform, options ) local args, pargs, options = frame.args, ( frame:getParent or {} ).args or {}, options or {}; local title = args.page or args[1] or pargs.page or pargs[1] or ""; local abort = options.abort or {}; local at, clock = type( abort.on ), os.clock; local ac = function if at == 'function' or ( at == 'table' and getmetatable(abort.on).__call ) then abort.on; end end local tt = type( transform ); local page = require( 'Module:Page' ); title = page.clean(title); if tt == 'function' or ( tt == 'table' and getmetatable(transform).__call ) then local fetch, pages, langcode, langname = mw.language.fetchLanguageName, {}; for pg in page.subpages( title, { ignoreNS=true } ) do           if abort.cycles then abort.cycles = abort.cycles - 1 if 0 == abort.cycles then return ac end end if abort.time then if (os.clock - clock) > abort.time then return ac end end if mw.ustring.len( pg ) <= 12 then langcode = string.lower( pg ); langname = fetch( langcode ); if langname ~= '' then table.insert( pages, transform( title, pg, langcode, langname ) ); end end end return pages; end return {}; end

function cloneArgs(frame) local args, pargs = {}, {} for k,v in pairs( frame.args ) do args[k] = v end if frame:getParent then for k,v in pairs( frame:getParent.args ) do pargs[k] = v end end return args, pargs; end

local p = {};

--[=[ Usage:

]=] function p.internal(frame) pages = language_subpages( frame, function( title, page, code, name )       return mw.ustring.format( ' %s ', code, code, code, title, page, name );   end); return table.concat( pages, ' · ' ); end

--[=[ Usage:

]=] function p.external(frame) pages = language_subpages( frame, function( title, page, code, name )       return mw.ustring.format( ' [%s/%s %s] ', code, code, code, tostring( mw.uri.fullUrl( title ) ), page:gsub( ' ', '_' ), name );   end); return table.concat( pages, ' | ' ); end

--[=[ forEachLanguage This function iterates over all language codes known to MediaWiki based on a maintained list replacing patterns in a pattern-string for each language Usage:

Parameters pattern: A pattern string which is processed for each language and which is concatenated at the end and returned as one string before: A string that is inserted before the concatenated result after: A string that is inserted after the concatenated result sep: A string that is inserted between each line created from the pattern while iterating (like ProcessedPattern_sep_ProcessedPattern_sep_ProcessedPattern) inLang: Langcode to use for $lnTrP and $lnTrUC1 Patterns: $lc - language code such as en or de   $lnP - language name in own language $lnUC1 - language name in own language, first letter upper case $lnTrP - language name translated to the language requested by language code passed to inLang $lnTrUC1 - language name translated to the language requested by language code passed to inLang, first letter upper case Example ]=]

-- =p.forEachLanguage({ args= { pattern = "$lc - $lnTrP\n", inLang = "en" } }) function p.forEachLanguage(frame) local l = require( "Module:Languages/List" ) local ret = {} local lang   = mw.language local contentLangInstance = mw.language.getContentLanguage local langInstance = contentLangInstance --Quota hit here otherwise local fetch  = lang.fetchLanguageName local line local pattern = frame.args.pattern  or frame.args[1] or "" local before = frame.args.before    or frame.args[2] or "" local after  = frame.args.after     or frame.args[3] or "" local sep    = frame.args.sep       or frame.args.separator or frame.args[4] or "" local inLang = frame.args.inLang    or frame.args[5] or nil local langName local langNameUCFirst local langNameTranslated local langNameTranslatedUCFirst local langNameUCFirstReq = not not pattern:find( "$lnUC1", 1, true ) local langNameReq = not not pattern:find( "$lnP", 1, true ) or langNameUCFirstReq local langNameTranslatedUCFirstReq = not not pattern:find( "$lnTrUC1", 1, true ) local langNameTranslatedReq = not not pattern:find( "$lnTrP", 1, true ) or langNameTranslatedUCFirstReq for k, v in pairs( l.list ) do        line = pattern:gsub( "$lc", v ) if langNameReq then langName = fetch( v ) line = line:gsub( "$lnP", langName ) end if langNameUCFirstReq then --langInstance = mw.getLanguage( v ) --Quota hit here langNameUCFirst = langInstance:ucfirst( langName ) line = line:gsub( "$lnUC1", langNameUCFirst ) end if langNameTranslatedReq and inLang then langNameTranslated = fetch( v, inLang ) line = line:gsub( "$lnTrP", langNameTranslated ) end if langNameTranslatedUCFirstReq and inLang then --if not langInstance then langInstance = mw.getLanguage( v ) end --Quota hit here langNameTranslatedUCFirst = langInstance:ucfirst( langNameTranslated ) line = line:gsub( "$lnTrUC1", langNameTranslatedUCFirst ) --langInstance = nil end -- Don't know why ret:insert( line ) throws >>attempt to call method 'insert' (a nil value)<< table.insert(ret, line) end return before .. table.concat( ret, sep ) .. after end

--[=[ Provide logic for Template:Lle (Language Links external, to be substituted) ]=] function p.lle(frame) local ret local pattern = "[ $lnUC1]" ret = p.forEachLanguage({ args= { pattern = pattern } }) ret = frame:preprocess(ret) return ret end

--[=[ Provide logic for Template:Ll (Language Links, to be substituted) ]=] function p.ll(frame) local ret local pattern = "/$lc$lnUC1" ret = p.forEachLanguage({ args= { pattern = pattern } }) ret = frame:preprocess(ret) return ret end

--- Different approaches for Template:Lang links ---

--[=[ Provide logic for Template:Lang links Using a cute Hybrid-Method: First check the subpages which is quite fast; if there are too many fall back to checking for each language page individually ]=]

-- =p.langLinksNonExpensive({ args= { page='Commons:Picture of the Year/2010' }, getParent=function end }) -- =p.langLinksNonExpensive({ args= { page='Main Page' }, getParent=function end }) -- =p.langLinksNonExpensive({ args= { page='Template:No_source_since' }, getParent=function end }) -- =p.langLinksNonExpensive({ args= { page='MediaWiki:Gadget-HotCat' }, getParent=function end }) function p.langLinksNonExpensive(frame) local contentLangInstance = mw.language.getContentLanguage; local pages2 local options = { abort= { time=1, on=function pages2 = p.langLinksUsingLinks( frame ) end } } local pages = language_subpages( frame, function( basepagename, subpagename, code, langname )       return mw.ustring.format( ' %s | ', code, code, code, basepagename, subpagename, contentLangInstance:ucfirst( langname ) )   end, options ); return table.concat( pages2 or pages, '' ); end

--[=[ Provide logic for Template:Lang links (Language Links,    creating wikilinks and parsing them to find out whether pages exist for Expensive-Parser-Function-Quota reasons      is not used and LUA page objects are not created) ]=] -- =p.langLinksUsingLinks({ args= { page='Template:No_source_since' }, getParent=function end }) function p.langLinksUsingLinks(frame) local contentLangInstance = mw.language.getContentLanguage -- Get the current page or the supplied one local args, pargs = frame.args, ( frame:getParent or {} ).args or {} local title = args.page or args[1] or pargs.page or pargs[1] or "" -- Load required modules local M_page = require( 'Module:Page' ); local M_link = require( 'Module:Link' ); title = M_page.clean(title); if not title then return "" end -- Generate the Wikitext we will parse as links (to bypass the expensive parser function limit) local pattern = '$lc' local wikitext = p.forEachLanguage( { args= { pattern = pattern } } ) local fetch   = mw.language.fetchLanguageName -- Iterate over all links we created and return the concatenated result local ret = M_link.forEachLink( wikitext,        function(linkInfo)            if linkInfo.red then return '' end            return mw.ustring.format( ' %s | ', linkInfo.text, linkInfo.text, linkInfo.text, title, linkInfo.text, contentLangInstance:ucfirst( fetch( linkInfo.text ) ))       end     ); return ret end

- - Template:Autolang - - -- Works like  just allowing an unlimited number of arguments, even named arguments.  It's doing Magic! No arguments should be passed to

function p.autolang(frame) local args, pargs = cloneArgs( frame ) if nil == args.useargs then if not args.base then args = pargs end elseif 'both' == args.useargs then for k,v in pairs(args) do pargs[k] = v end args = pargs elseif 'parent' == args.useargs then args = pargs if pargs.base and not args.base then args.base = pargs.base end end local base = args.base local userlang = mw.message.newRawMessage( '' ):parse local tl, tlns = 'Template:', 10 local tlb, fallback1, currenttemplate local fallback, contentlang = mw.text.split( userlang, '-', true )[1], mw.language.getContentLanguage:getCode local createReturn = function(title) local ret local tlargs = {} -- When LUA is invoked, templates are already expanded. This must be respected. return frame:expandTemplate{ title = title, args = args } end if not base then return ("'autolang' in Module:Languages was called but the 'base' parameter could not be found." ..            "The base parameter specifies the template that's subpages will be sought for a suitable translation.") end tlb = tl .. base .. '/'   currenttemplate = tlb .. userlang if mw.title.new( currenttemplate, tlns ).exists then return createReturn(currenttemplate) end fallback1 = frame:preprocess( '' ) if fallback1 ~= contentlang then return createReturn(tlb .. fallback1) end currenttemplate = tlb .. fallback if mw.title.new( currenttemplate, tlns ).exists then return createReturn(currenttemplate) end currenttemplate = tlb .. contentlang if mw.title.new( currenttemplate, tlns ).exists then return createReturn(currenttemplate) end return createReturn(tl .. base) end

function p.file_languages(frame) local M_link = require( 'Module:Link' ) local contentLangInstance = mw.language.getContentLanguage local pattern = frame.args.pattern or '%s (%s)' local original = frame.args.original or mw.title.getCurrentTitle.text local ext_start, _ = string.find( original, '\.%w+$' ) local file_ext = string.sub( original, ext_start ) original = string.sub( original, 0, ext_start-1 ) return frame:preprocess('') end

return p;