Modul:Excerpt

-- Module:Excerpt implements the Excerpt template
-- Documentation and master version: https://en.wikipedia.org/wiki/Module:Excerpt
-- Authors: User:Sophivorus, User:Certes, User:Aidan9382 & others
-- License: CC-BY-SA-3.0
localparser=require('Module:WikitextParser')
localyesno=require('Module:Yesno')
localok,config=pcall(require,'Module:Excerpt/config')
ifnotokthenconfig={}end
localExcerpt={}
-- Main entry point for templates
functionExcerpt.main(frame)
-- Make sure the requested page exists and get the wikitext
localpage=Excerpt.getArg(1)
ifnotpageorpage=='{{{1}}}'thenreturnExcerpt.getError('no-page')end
localtitle=mw.title.new(page)
ifnottitlethenreturnExcerpt.getError('invalid-title',page)end
localfragment=title.fragment-- save for later
iftitle.isRedirectthen
title=title.redirectTarget
iffragment==""then
fragment=title.fragment-- page merge potential	
end
end
ifnottitle.existsthenreturnExcerpt.getError('page-not-found',page)end
page=title.prefixedText
localwikitext=title:getContent()
-- Get the template params and process them
localparams={
hat=yesno(Excerpt.getArg('hat',true)),
this=Excerpt.getArg('this'),
only=Excerpt.getArg('only'),
files=Excerpt.getArg('files',Excerpt.getArg('file')),
lists=Excerpt.getArg('lists',Excerpt.getArg('list')),
tables=Excerpt.getArg('tables',Excerpt.getArg('table')),
templates=Excerpt.getArg('templates',Excerpt.getArg('template')),
paragraphs=Excerpt.getArg('paragraphs',Excerpt.getArg('paragraph')),
references=yesno(Excerpt.getArg('references',true)),
subsections=yesno(Excerpt.getArg('subsections',false)),
links=yesno(Excerpt.getArg('links',true)),
bold=yesno(Excerpt.getArg('bold',false)),
briefDates=yesno(Excerpt.getArg('briefdates',false)),
inline=yesno(Excerpt.getArg('inline')),
quote=yesno(Excerpt.getArg('quote')),
more=yesno(Excerpt.getArg('more')),
class=Excerpt.getArg('class'),
track=yesno(Excerpt.getArg('track',true)),
displayTitle=Excerpt.getArg('displaytitle',page),
}
-- Make sure the requested section exists and get the excerpt
localexcerpt
localsection=Excerpt.getArg(2,fragment)
section=mw.text.trim(section)
ifsection==''thensection=nilend
ifsectionthen
excerpt=parser.getSectionTag(wikitext,section)
ifnotexcerptthen
ifparams.subsectionsthen
excerpt=parser.getSection(wikitext,section)
else
localsections=parser.getSections(wikitext)
excerpt=sections[section]
end
end
ifnotexcerptthenreturnExcerpt.getError('section-not-found',section)end
ifexcerpt==''thenreturnExcerpt.getError('section-empty',section)end
else
excerpt=parser.getLead(wikitext)
ifexcerpt==''thenreturnExcerpt.getError('lead-empty')end
end
-- Remove noinclude bits
excerpt=excerpt:gsub('<[Nn][Oo][Ii][Nn][Cc][Ll][Uu][Dd][Ee]>.-</[Nn][Oo][Ii][Nn][Cc][Ll][Uu][Dd][Ee]>','')
-- Filter various elements from the excerpt
excerpt=Excerpt.filterFiles(excerpt,params.files)
excerpt=Excerpt.filterLists(excerpt,params.lists)
excerpt=Excerpt.filterTables(excerpt,params.tables)
excerpt=Excerpt.filterParagraphs(excerpt,params.paragraphs)
-- If no file is found, try to get one from the infobox
if(params.only=='file'orparams.only=='files'orparams.only=='filename'ornotparams.onlyand(notparams.filesorparams.files~='0'))-- caller asked for files
andnotsection-- and we're in the lead section
andconfig.captions-- and we have the config option required to try finding files in infoboxes
and#parser.getFiles(excerpt)==0-- and there're no files in the excerpt
then
excerpt=Excerpt.addInfoboxFile(excerpt)
end
-- Filter the templates by appending the templates blacklist to the templates filter
ifconfig.blacklistthen
localblacklist=table.concat(config.blacklist,',')
ifparams.templatesthen
ifstring.sub(params.templates,1,1)=='-'then
params.templates=params.templates..','..blacklist
end
else
params.templates='-'..blacklist
end
end
excerpt=Excerpt.filterTemplates(excerpt,params.templates)
-- Leave only the requested elements
ifparams.only=='file'orparams.only=='files'then
localfiles=parser.getFiles(excerpt)
excerpt=params.only=='file'andfiles[1]ortable.concat(files,'\n\n')
end
ifparams.only=='list'orparams.only=='lists'then
locallists=parser.getLists(excerpt)
excerpt=params.only=='list'andlists[1]ortable.concat(lists,'\n\n')
end
ifparams.only=='table'orparams.only=='tables'then
localtables=parser.getTables(excerpt)
excerpt=params.only=='table'andtables[1]ortable.concat(tables,'\n\n')
end
ifparams.only=='paragraph'orparams.only=='paragraphs'then
localparagraphs=parser.getParagraphs(excerpt)
excerpt=params.only=='paragraph'andparagraphs[1]ortable.concat(paragraphs,'\n\n')
end
ifparams.only=='template'orparams.only=='templates'then
localtemplates=parser.getTemplates(excerpt)
excerpt=params.only=='template'andtemplates[1]ortable.concat(templates,'\n\n')
end
ifparams.only=='filename'then
localfiles=parser.getFiles(excerpt)
localfile=files[1]
excerpt=fileandparser.getFileName(file)or'Noimage.png'
params.inline=true
end
-- @todo Make more robust and move downwards
ifparams.briefDatesthen
excerpt=Excerpt.fixDates(excerpt)
end
-- Remove unwanted elements
excerpt=Excerpt.removeComments(excerpt)
excerpt=Excerpt.removeSelfLinks(excerpt)
excerpt=Excerpt.removeNonFreeFiles(excerpt)
excerpt=Excerpt.removeBehaviorSwitches(excerpt)
-- Fix or remove the references
ifparams.referencesthen
excerpt=Excerpt.fixReferences(excerpt,page,wikitext)
else
excerpt=Excerpt.removeReferences(excerpt)
end
-- Remove wikilinks
ifnotparams.linksthen
excerpt=Excerpt.removeLinks(excerpt)
end
-- Link the bold text near the start of most leads and then remove it
ifnotsectionthen
excerpt=Excerpt.linkBold(excerpt,page)
end
ifnotparams.boldthen
excerpt=Excerpt.removeBold(excerpt)
end
-- Remove extra line breaks but leave one before and after so the parser interprets lists, tables, etc. correctly
excerpt=excerpt:gsub('\n\n\n+','\n\n')
excerpt=mw.text.trim(excerpt)
excerpt='\n'..excerpt..'\n'
-- Remove nested categories
excerpt=frame:preprocess(excerpt)
excerpt=Excerpt.removeCategories(excerpt)
-- Add tracking categories
ifparams.trackandconfig.categoriesthen
excerpt=Excerpt.addTrackingCategories(excerpt)
end
-- Build the final output
ifparams.inlinethen
returnmw.text.trim(excerpt)
end
localtag=params.quoteand'blockquote'or'div'
localblock=mw.html.create(tag):addClass('excerpt-block'):addClass(params.class)
ifconfig.stylesthen
localstyles=frame:extensionTag('templatestyles','',{src=config.styles})
block:node(styles)
end
ifparams.hatthen
localhat=Excerpt.getHat(page,section,params)
block:node(hat)
end
excerpt=mw.html.create('div'):addClass('excerpt'):wikitext(excerpt)
block:node(excerpt)
ifparams.morethen
localmore=Excerpt.getReadMore(page,section)
block:node(more)
end
returnblock
end
-- Filter the files in the given wikitext against the given filter
functionExcerpt.filterFiles(wikitext,filter)
ifnotfilterthenreturnwikitextend
localfilters,isBlacklist=Excerpt.parseFilter(filter)
localfiles=parser.getFiles(wikitext)
forindex,fileinpairs(files)do
localname=parser.getFileName(file)
ifisBlacklistand(Excerpt.matchFilter(index,filters)orExcerpt.matchFilter(name,filters))
ornotisBlacklistand(notExcerpt.matchFilter(index,filters)andnotExcerpt.matchFilter(name,filters))then
wikitext=Excerpt.removeString(wikitext,file)
end
end
returnwikitext
end
-- Filter the lists in the given wikitext against the given filter
functionExcerpt.filterLists(wikitext,filter)
ifnotfilterthenreturnwikitextend
localfilters,isBlacklist=Excerpt.parseFilter(filter)
locallists=parser.getLists(wikitext)
forindex,listinpairs(lists)do
ifisBlacklistandExcerpt.matchFilter(index,filters)
ornotisBlacklistandnotExcerpt.matchFilter(index,filters)then
wikitext=Excerpt.removeString(wikitext,list)
end
end
returnwikitext
end
-- Filter the tables in the given wikitext against the given filter
functionExcerpt.filterTables(wikitext,filter)
ifnotfilterthenreturnwikitextend
localfilters,isBlacklist=Excerpt.parseFilter(filter)
localtables=parser.getTables(wikitext)
forindex,tableWikitextinpairs(tables)do
localid=parser.getTableAttribute(tableWikitext,'id')
ifisBlacklistand(Excerpt.matchFilter(index,filters)orExcerpt.matchFilter(id,filters))
ornotisBlacklistand(notExcerpt.matchFilter(index,filters)andnotExcerpt.matchFilter(id,filters))then
wikitext=Excerpt.removeString(wikitext,tableWikitext)
end
end
returnwikitext
end
-- Filter the paragraphs in the given wikitext against the given filter
functionExcerpt.filterParagraphs(wikitext,filter)
ifnotfilterthenreturnwikitextend
localfilters,isBlacklist=Excerpt.parseFilter(filter)
localparagraphs=parser.getParagraphs(wikitext)
forindex,paragraphinpairs(paragraphs)do
ifisBlacklistandExcerpt.matchFilter(index,filters)
ornotisBlacklistandnotExcerpt.matchFilter(index,filters)then
wikitext=Excerpt.removeString(wikitext,paragraph)
end
end
returnwikitext
end
-- Filter the templates in the given wikitext against the given filter
functionExcerpt.filterTemplates(wikitext,filter)
ifnotfilterthenreturnwikitextend
localfilters,isBlacklist=Excerpt.parseFilter(filter)
localtemplates=parser.getTemplates(wikitext)
forindex,templateinpairs(templates)do
localname=parser.getTemplateName(template)
ifisBlacklistand(Excerpt.matchFilter(index,filters)orExcerpt.matchFilter(name,filters))
ornotisBlacklistand(notExcerpt.matchFilter(index,filters)andnotExcerpt.matchFilter(name,filters))then
wikitext=Excerpt.removeString(wikitext,template)
end
end
returnwikitext
end
functionExcerpt.addInfoboxFile(excerpt)
-- We cannot distinguish the infobox from the other templates, so we search them all
localtemplates=parser.getTemplates(excerpt)
for_,templateinpairs(templates)do
localparameters=parser.getTemplateParameters(template)
localfile,captions,caption,cssClasses,cssClass
for_,pairinpairs(config.captions)do
file=pair[1]
file=parameters[file]
iffileandExcerpt.matchAny(file,'^.*%.',{'[Jj][Pp][Ee]?[Gg]','[Pp][Nn][Gg]','[Gg][Ii][Ff]','[Ss][Vv][Gg]'},'.*')then
file=string.match(file,'%[?%[?.-:([^{|]+)%]?%]?')orfile-- [[File:Example.jpg{{!}}upright=1.5]] to Example.jpg
captions=pair[2]
for_,pinpairs(captions)do
ifparameters[p]thencaption=parameters[p]breakend
end
-- Check for CSS classes
-- We opt to use skin-invert-image instead of skin-invert
-- in all other cases, the CSS provided in the infobox is used
ifpair[3]then
cssClasses=pair[3]
for_,pinpairs(cssClasses)do
ifparameters[p]then
cssClass=(parameters[p]=='skin-invert')and'skin-invert-image'orparameters[p]
break
end
end
end
localclass=cssClassand('|class='..cssClass)or''
return'[[File:'..file..class..'|thumb|'..(captionor'')..']]\n'..excerpt
end
end
end
returnexcerpt
end
functionExcerpt.removeNonFreeFiles(wikitext)
localfiles=parser.getFiles(wikitext)
for_,fileinpairs(files)do
localfileName='File:'..parser.getFileName(file)
localfileTitle=mw.title.new(fileName)
iffileTitlethen
localfileDescription=fileTitle:getContent()
ifnotfileDescriptionorfileDescription==''then
localframe=mw.getCurrentFrame()
fileDescription=frame:preprocess('{{'..fileName..'}}')-- try Commons
end
iffileDescriptionandstring.match(fileDescription,'[Nn]on%-free')then
wikitext=Excerpt.removeString(wikitext,file)
end
end
end
returnwikitext
end
functionExcerpt.getHat(page,section,params)
localhat
-- Build the text
ifparams.thisthen
hat=params.this
elseifparams.quotethen
hat=Excerpt.getMessage('this')
elseifparams.onlythen
hat=Excerpt.getMessage(params.only)
else
hat=Excerpt.getMessage('section')
end
hat=hat..' '..Excerpt.getMessage('excerpt')
-- Build the link
ifsectionthen
hat=hat..' [[:'..page..'#'..mw.uri.anchorEncode(section)..'|'..params.displayTitle
..' § '..section:gsub('%[%[([^]|]+)|?[^]]*%]%]','%1')..']].'-- remove nested links
else
hat=hat..' [[:'..page..'|'..params.displayTitle..']].'
end
-- Build the edit link
localtitle=mw.title.new(page)
localeditUrl=title:fullUrl('action=edit')
hat=hat..'<span class="mw-editsection-like plainlinks"><span class="mw-editsection-bracket">[</span>['
hat=hat..editUrl..' '..mw.message.new('editsection'):plain()
hat=hat..']<span class="mw-editsection-bracket">]</span></span>'
ifconfig.hatthen
localframe=mw.getCurrentFrame()
hat=config.hat..hat..'}}'
hat=frame:preprocess(hat)
else
hat=mw.html.create('div'):addClass('dablink excerpt-hat'):wikitext(hat)
end
returnhat
end
functionExcerpt.getReadMore(page,section)
locallink="'''[["..page
ifsectionthen
link=link..'#'..section
end
localtext=Excerpt.getMessage('more')
link=link..'|'..text.."]]'''"
link=mw.html.create('div'):addClass('noprint excerpt-more'):wikitext(link)
returnlink
end
-- Fix birth and death dates, but only in the first paragraph
-- @todo Use parser.getParagraphs() to get the first paragraph
functionExcerpt.fixDates(excerpt)
localstart
locals
locale=0
repeat
start=e+1
s,e=mw.ustring.find(excerpt,'%s*%b{}%s*',start)
untilnotsors>start
s,e=mw.ustring.find(excerpt,'%b()',start)-- get (...), which may be (year–year)
ifsands<start+100then-- look only near the start
localexcerptStart=mw.ustring.sub(excerpt,s,e)
localyear1,conjunction,year2=string.match(excerptStart,'(%d%d%d+)(.-)(%d%d%d+)')
ifyear1andyear2and(string.match(conjunction,'[%-–—]')orstring.match(conjunction,'{{%s*[sS]nd%s*}}'))then
localy1=tonumber(year1)
localy2=tonumber(year2)
ify2>y1andy2<y1+125andy1<=tonumber(os.date('%Y'))then
excerpt=mw.ustring.sub(excerpt,1,s)..year1..'–'..year2..mw.ustring.sub(excerpt,e)
end
end
end
returnexcerpt
end
-- Replace the first call to each reference defined outside of the excerpt for the full reference, to prevent undefined references
-- Then prefix the page title to the reference names to prevent conflicts
-- that is, replace <ref name="Foo"> for <ref name="Title of the article Foo">
-- and also <ref name="Foo" /> for <ref name="Title of the article Foo" />
-- also remove reference groups: <ref name="Foo" group="Bar"> for <ref name="Title of the article Foo">
-- and <ref group="Bar"> for <ref>
-- @todo The current regex may fail in cases with both kinds of quotes, like <ref name="Darwin's book">
functionExcerpt.fixReferences(excerpt,page,wikitext)
localreferences=parser.getReferences(excerpt)
localfixed={}
for_,referenceinpairs(references)do
localname=parser.getTagAttribute(reference,'name')
ifnotfixed[name]then-- fix each reference only once
localcontent=parser.getTagContent(reference)
ifnotcontentthen-- reference is self-closing
localfull=parser.getReference(excerpt,name)
ifnotfullthen-- the reference is not defined in the excerpt
full=parser.getReference(wikitext,name)
iffullthen
excerpt=excerpt:gsub(Excerpt.escapeString(reference),Excerpt.escapeString(full),1)
end
table.insert(fixed,name)
end
end
end
end
-- Prepend the page title to the reference names to prevent conflicts with other references in the transcluding page
excerpt=excerpt:gsub('< *[Rr][Ee][Ff][^>]*name *= *["\']?([^"\'>/]+)["\']?[^>/]*(/?) *>','<ref name="'..page:gsub('"','')..' %1"%2>')
-- Remove reference groups because they don't apply to the transcluding page
excerpt=excerpt:gsub('< *[Rr][Ee][Ff] *group *= *["\']?[^"\'>/]+["\'] *>','<ref>')
returnexcerpt
end
functionExcerpt.removeReferences(excerpt)
localreferences=parser.getReferences(excerpt)
for_,referenceinpairs(references)do
excerpt=Excerpt.removeString(excerpt,reference)
end
returnexcerpt
end
functionExcerpt.removeCategories(excerpt)
localcategories=parser.getCategories(excerpt)
for_,categoryinpairs(categories)do
excerpt=Excerpt.removeString(excerpt,category)
end
returnexcerpt
end
functionExcerpt.removeBehaviorSwitches(excerpt)
returnexcerpt:gsub('__[A-Z]+__','')
end
functionExcerpt.removeComments(excerpt)
returnexcerpt:gsub('<!%-%-.-%-%->','')
end
functionExcerpt.removeBold(excerpt)
returnexcerpt:gsub("'''",'')
end
functionExcerpt.removeLinks(excerpt)
locallinks=parser.getLinks(excerpt)
for_,linkinpairs(links)do
excerpt=Excerpt.removeString(excerpt,link)
end
returnexcerpt
end
-- @todo Use parser.getLinks
functionExcerpt.removeSelfLinks(excerpt)
locallang=mw.language.getContentLanguage()
localpage=Excerpt.escapeString(mw.title.getCurrentTitle().prefixedText)
localucpage=lang:ucfirst(page)
locallcpage=lang:lcfirst(page)
excerpt=excerpt
:gsub('%[%[('..ucpage..')%]%]','%1')
:gsub('%[%[('..lcpage..')%]%]','%1')
:gsub('%[%['..ucpage..'|([^]]+)%]%]','%1')
:gsub('%[%['..lcpage..'|([^]]+)%]%]','%1')
returnexcerpt
end
-- Replace the bold title or synonym near the start of the page by a link to the page
functionExcerpt.linkBold(excerpt,page)
locallang=mw.language.getContentLanguage()
localposition=mw.ustring.find(excerpt,"'''"..lang:ucfirst(page).."'''",1,true)-- look for "'''Foo''' is..." (uc) or "A '''foo''' is..." (lc)
ormw.ustring.find(excerpt,"'''"..lang:lcfirst(page).."'''",1,true)-- plain search: special characters in page represent themselves
ifpositionthen
locallength=mw.ustring.len(page)
excerpt=mw.ustring.sub(excerpt,1,position+2)..'[['..mw.ustring.sub(excerpt,position+3,position+length+2)..']]'..mw.ustring.sub(excerpt,position+length+3,-1)-- link it
else-- look for anything unlinked in bold, assumed to be a synonym of the title (e.g. a person's birth name)
excerpt=mw.ustring.gsub(excerpt,"'''(.-'*)'''",function(text)
ifnotstring.find(text,'%[')andnotstring.find(text,'%{')then-- if not wikilinked or some weird template
return"'''[["..page..'|'..text.."]]'''"-- replace '''Foo''' by '''[[page|Foo]]'''
else
returnnil-- instruct gsub to make no change
end
end,1)-- terminates the anonymous replacement function passed to gsub
end
returnexcerpt
end
functionExcerpt.addTrackingCategories(excerpt)
localcurrentTitle=mw.title.getCurrentTitle()
localaddedCategories=false
localcontentCategory=config.categories.content
ifcontentCategoryandcurrentTitle.isContentPagethen
addedCategories=true
excerpt=excerpt..'[[Category:'..contentCategory..']]'
end
localnamespaceCategory=config.categories[currentTitle.namespace]
ifnamespaceCategorythen
addedCategories=true
excerpt=excerpt..'[[Category:'..namespaceCategory..']]'
end
ifaddedCategoriesthen
excerpt=excerpt..'\n'
end
returnexcerpt
end
-- Helper method to match from a list of regular expressions
-- Like so: match pre..list[1]..post or pre..list[2]..post or ...
functionExcerpt.matchAny(text,pre,list,post,init)
fori=1,#listdo
localmatch={mw.ustring.match(text,pre..list[i]..post,init)}
ifmatch[1]thenreturnunpack(match)end
end
returnnil
end
-- Helper function to get arguments
-- args from Lua calls have priority over parent args from template
functionExcerpt.getArg(key,default)
localframe=mw.getCurrentFrame()
fork,valueinpairs(frame:getParent().args)do
ifk==keyandmw.text.trim(value)~=''then
returnvalue
end
end
fork,valueinpairs(frame.args)do
ifk==keyandmw.text.trim(value)~=''then
returnvalue
end
end
returndefault
end
-- Helper method to get an error message
-- This method also categorizes the current page in one of the configured error categories
functionExcerpt.getError(key,value)
localmessage=Excerpt.getMessage('error-'..key,value)
localmarkup=mw.html.create('div'):addClass('error'):wikitext(message)
ifconfig.categoriesandconfig.categories.errorsandmw.title.getCurrentTitle().isContentPagethen
markup:node('[[Category:'..config.categories.errors..']]')
end
returnmarkup
end
-- Helper method to get a localized message
-- This method uses Module:TNT to get localized messages from https://commons.wikimedia.org/wiki/Data:I18n/Module:Excerpt.tab
-- If Module:TNT is not available or the localized message does not exist, the key is returned instead
functionExcerpt.getMessage(key,value)
localok2,TNT=pcall(require,'Module:TNT')
ifnotok2thenreturnkeyend
localok3,message=pcall(TNT.format,'I18n/Module:Excerpt.tab',key,value)
ifnotok3thenreturnkeyend
returnmessage
end
-- Helper method to escape a string for use in regexes
functionExcerpt.escapeString(str)
returnstr:gsub('[%^%$%(%)%.%[%]%*%+%-%?%%]','%%%0')
end
-- Helper method to remove a string from a text
-- @param text Text from where to remove the string
-- @param str String to remove
-- @return The given text with the string removed
functionExcerpt.removeString(text,str)
localpattern=Excerpt.escapeString(str)
if#pattern>9999then-- strings longer than 10000 bytes can't be put into regexes
pattern=Excerpt.escapeString(mw.ustring.sub(str,1,999))..'.-'..Excerpt.escapeString(mw.ustring.sub(str,-999))
end
returntext:gsub(pattern,'')
end
-- Helper method to convert a comma-separated list of numbers or min-max ranges into a list of booleans
-- @param filter Required. Comma-separated list of numbers or min-max ranges, for example '1,3-5'
-- @return Map from integers to booleans, for example {1=true,2=false,3=true,4=true,5=true}
-- @return Boolean indicating whether the filters should be treated as a blacklist or not
-- @note Merging this into matchFilter is possible, but way too inefficient
functionExcerpt.parseFilter(filter)
localfilters={}
localisBlacklist=false
ifstring.sub(filter,1,1)=='-'then
isBlacklist=true
filter=string.sub(filter,2)
end
localvalues=mw.text.split(filter,',')-- split values: '1,3-5' to {'1','3-5'}
for_,valueinpairs(values)do
value=mw.text.trim(value)
localmin,max=mw.ustring.match(value,'^(%d+)%s*[-–—]%s*(%d+)$')-- '3-5' to min=3 max=5
ifnotmaxthenmin,max=string.match(value,'^((%d+))$')end-- '1' to min=1 max=1
ifmaxthen
fori=min,maxdofilters[i]=trueend
else
filters[value]=true-- if we reach this point, the string had the form 'a,b,c' rather than '1,2,3'
end
end
filter={cache={},terms=filters}
returnfilter,isBlacklist
end
-- Helper function to see if a value matches any of the given filters
functionExcerpt.matchFilter(value,filter)
ifvalue==nilthen
returnfalse
elseiftype(value)=="number"then
returnfilter.terms[value]
else
localcached=filter.cache[value]
ifcached~=nilthen
returncached
end
locallang=mw.language.getContentLanguage()
locallcvalue=lang:lcfirst(value)
localucvalue=lang:ucfirst(value)
forterminpairs(filter.terms)do
ifvalue==tostring(term)
ortype(term)=="string"and(
lcvalue==term
orucvalue==term
ormw.ustring.match(value,term)
)then
filter.cache[value]=true
returntrue
end
end
filter.cache[value]=false
end
end
returnExcerpt