Module:Resolve category redirect

local p = {}

--Returns the target of, if it exists, else returns the original cat. --Used by catlinkfollowr, and so indirectly by all nav_*. function rtarget( cat ) local catcontent = mw.title.new( cat or '', 'Category' ):getContent if string.match( catcontent or '', '{{ *[Cc]at' ) then local regex = { --the following 11 pages (7 condensed) redirect to Template:Category redirect (as of 6/2019): { '1', '{{ *[Cc]ategory *[Rr]edirect' }, --most likely match 1st { '2', '{{ *[Cc]at *redirect' },        --444+240 transclusions { '3', '{{ *[Cc]at *redir' },           --8+3 { '4', '{{ *[Cc]ategory *move' },       --6 { '5', '{{ *[Cc]at *red' },             --6 { '6', '{{ *[Cc]atr' },                 --4 { '7', '{{ *[Cc]at *move' },            --0 }		for k, v in pairs (regex) do			local rtarget = mw.ustring.match( catcontent, v[2]..'%s*|%s*([^|}]+)' ) if rtarget then rtarget = mw.ustring.gsub(rtarget, '^1%s*=%s*', '') rtarget = string.gsub(rtarget, '^[Cc]ategory:', '') return rtarget end end end return cat end

function p.main( frame ) local args = frame:getParent.args local cat = args[1] if (cat == "") or (cat == nil) then return "" end return rtarget( cat ) end

return p