Module:Get short description/sandbox

Implements {{get short description}}.
require ('strict')

--[[--------------------------< P A T T E R N S _ T >----------------------------------------------------------

a sequence of patterns to match canonical template name and its redirects by transclusion counts as of 2024-08-15:
	'Short description',														-- 6,090,442 (canonical form)
	'Short Description',														-- 124
	'Des',																		-- 20
	'Shortdesc',																-- 10
	'Short desc',																-- 8
	'Shortdescription',															-- 6

]]

local patterns_t = {
	'[Ss]hort [Dd]escription',
	'[Dd]es',
	'[Ss]hort *desc',
	'[Ss]hortdescription',
	}


--[[-----------------------------< G E T C O N T E N T >-------------------------------------------------------

fetch the article's raw wikitext
]]

local function getContent(title)
	local success, titleObj = pcall(mw.title.new, title)						-- get a title object for title
	if not success then return nil end											-- return nil if sommat went wron
	return titleObj:getContent()												-- return wikitext else
end


--[[-----------------------------< M A I N >-------------------------------------------------------------------
]]

local function main(frame, title)												-- do we really need <title> here?
	local title = frame.args[1]
    local wikitext = getContent(title)
	if wikitext == nil then return "" end										-- sommat went wrong, abandon

	for _, pattern in ipairs (patterns_t) do									-- for each pattern in the sequence of redirect patterns
		local description = wikitext:match ('{{%s*' .. pattern .. '%s*|%s*([^|}]+)%s*');	-- try to find a match
		if description then
			return description;													-- found one, stop looking and done
		end
	end	
end


--[[-----------------------------< E X P O R T S >-------------------------------------------------------------
]]

return {
	main = main,
	}