Module:Namespace detect/data/sandbox

 --------------------------------------------------------------------------------
 -- Namespace detect data --
 -- This module holds data for [[Module:Namespace detect]] to be loaded per --
 -- page, rather than per #invoke, for performance reasons. --
 --------------------------------------------------------------------------------

 localcfg=require('Module:Namespace detect/config')

 localfunctionaddKey(t,key,defaultKey)
 ifkey~=defaultKeythen
 t[#t+1]=key
 end
 end

 -- Get a table of parameters to query for each default parameter name.
 -- This allows wikis to customise parameter names in the cfg table while
 -- ensuring that default parameter names will always work. The cfg table
 -- values can be added as a string, or as an array of strings.

 localdefaultKeys={
 'main',
 'talk',
 'other',
 'subjectns',
 'demospace',
 'demopage'
 }

 localargKeys={}
 fori,defaultKeyinipairs(defaultKeys)do
 argKeys[defaultKey]={defaultKey}
 end

 fordefaultKey,tinpairs(argKeys)do
 localcfgValue=cfg[defaultKey]
 localcfgValueType=type(cfgValue)
 ifcfgValueType=='string'then
 addKey(t,cfgValue,defaultKey)
 elseifcfgValueType=='table'then
 fori,keyinipairs(cfgValue)do
 addKey(t,key,defaultKey)
 end
 end
 cfg[defaultKey]=nil-- Free the cfg value as we don't need it any more.
 end

 localfunctiongetParamMappings()
 --[[
 	-- Returns a table of how parameter names map to namespace names. The keys
 	-- are the actual namespace names, in lower case, and the values are the
 	-- possible parameter names for that namespace, also in lower case. The
 	-- table entries are structured like this:
 	-- {
 	-- [''] = {'main'},
 	-- ['wikipedia'] = {'wikipedia', 'project', 'wp'},
 	-- ...
 	-- }
 	--]]
 localmappings={}
 localmainNsName=mw.site.subjectNamespaces[0].name
 mainNsName=mw.ustring.lower(mainNsName)
 mappings[mainNsName]=mw.clone(argKeys.main)
 mappings['talk']=mw.clone(argKeys.talk)
 fornsid,nsinpairs(mw.site.subjectNamespaces)do
 ifnsid~=0then-- Exclude main namespace.
 localnsname=mw.ustring.lower(ns.name)
 localcanonicalName=mw.ustring.lower(ns.canonicalName)
 mappings[nsname]={nsname}
 ifcanonicalName~=nsnamethen
 table.insert(mappings[nsname],canonicalName)
 end
 for_,aliasinipairs(ns.aliases)do
 table.insert(mappings[nsname],mw.ustring.lower(alias))
 end
 end
 end
 returnmappings
 end

 return{
 argKeys=argKeys,
 cfg=cfg,
 mappings=getParamMappings()
 }