Module:Cat year

local p = {}

function p.parse( frame ) local date_str = frame.args[1] if date_str == '' then return date_str end

local cat_type = frame.args[2] local matches = string.gmatch( date_str, "%d%d%d%d" )

-- Categorize each release if cat_type == '' then cat_type = 'song' end for year in matches do date_str = date_str .. ''	end

-- Categorize the first release as just 'song' or 'album', etc.	local first_year = string.match( date_str, "%d%d%d%d" ) if first_year and cat_type ~= 'song' then date_str = date_str .. ''	end

return date_str end

return p