Editing Module:Sandbox/RexxS/GetImages

-- Draft version of a call to return images from Commons in a simple format
-- parameters are | propertyID | value / FETCH_WIKIDATA / nil | separator (default=space) | size (default=220px)
-- the caller assumes responsibility for ensuring the property is of type 'Commons media file'

local p = {}

p.getImages = function(frame)
	local propertyID = mw.text.trim(frame.args[1] or "")
	local input_parm = mw.text.trim(frame.args[2] or "")
	local sep = mw.text.trim(frame.args[3] or " ")
	local imgsize = mw.text.trim(frame.args[4] or "220px")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntityObject()
		local claims
		if entity and entity.claims then
			claims = entity.claims[propertyID]
		end
		if claims then
			if (claims[1] and claims[1].mainsnak.datatype == "commonsMedia") then
				local out = {}
				for k, v in pairs(claims) do
					local filename = v.mainsnak.datavalue.value
					out[#out + 1] = "[[File:" .. filename .. "|" .. imgsize .. "]]"
				end
				return table.concat(out, sep)
			else
				return ""
			end
		else
			return ""
		end
	else
		return input_parm
	end
end

return p