Module:Wikidata

Documentation for this module may be created at Module:Wikidata/doc

local p = {}

-- This is used to get a normal wiki-linked value, or a comma separated list of them if multiple values exist
p.getValue = function(frame)
	local propertyID = mw.text.trim(frame.args[1] or "")
	local input_parm = mw.text.trim(frame.args[2] or "")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntity()
		if entity.claims[propertyID] ~= nil then
			local out = {}
			for k, v in pairs(entity.claims[propertyID]) do
				if v.mainsnak.snaktype == 'value' then
					if (mw.wikibase.sitelink("Q" .. v.mainsnak.datavalue.value["numeric-id"])) then
						out[#out + 1] = "[[" .. mw.wikibase.sitelink("Q" .. v.mainsnak.datavalue.value["numeric-id"]) .. "]]"
					else
						out[#out + 1] = "[[:d:" .. "Q" .. v.mainsnak.datavalue.value["numeric-id"] .. "|Q" .. v.mainsnak.datavalue.value["numeric-id"] .. "]]<small><abbr title='Article is not yet available in this wiki'>[?]</abbr></small>"
					end
				end
			end
			return table.concat(out, ", ")
		else
			return ""
		end
	else
		return input_parm
	end
end

-- This is used to get a value like 'male' (for property p21) which won't be linked
p.getRawValue = function(frame)
	local propertyID = mw.text.trim(frame.args[1] or "")
	local input_parm = mw.text.trim(frame.args[2] or "")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntity()
		if entity.claims[propertyID] ~= nil then
			local out = {}
			for k, v in pairs(entity.claims[propertyID]) do
				if v.mainsnak.snaktype == 'value' then
					out[#out + 1] = mw.wikibase.label("Q" .. v.mainsnak.datavalue.value["numeric-id"])
				end
			end
			return table.concat(out, ", ")
		else
			return ""
		end
	else
		return input_parm
	end
end

-- This is used to get a date value for date_of_birth (p569), etc. which won't be linked -- consolidate by testing if entity.claims[propertyID].mainsnak.datavalue.type is "time"
-- Dates are stored as 28 characters if the year  >99 -- e.g. +00000002014-01-01T00:00:00Z for 2014
-- Dates are stored as 26 characters if the year =<99 -- e.g. +000000050-01-01T00:00:00Z   for 50 CE
p.getDateValue = function(frame)
	local propertyID = mw.text.trim(frame.args[1] or "")
	local input_parm = mw.text.trim(frame.args[2] or "")
	local date_format = mw.text.trim(frame.args[3] or "dmy")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntity()
		if entity.claims[propertyID] ~= nil then
			local out = {}
			local dt = {}
			for k, v in pairs(entity.claims[propertyID]) do
				if v.mainsnak.snaktype == 'value' then
					local d = v.mainsnak.datavalue.value.time
					if #d > 26 then
						dt.year = string.sub(d, 9, 12)
						dt.month = string.sub(d, 14, 15)
						dt.day = string.sub(d, 17, 18)
					else
						dt.year = string.sub(d, 9, 10)
						dt.month = string.sub(d, 12, 13)
						dt.day = string.sub(d, 15, 16)						
					end
					if date_format == "dmy" then
						out[#out + 1] = os.date("%e %B %Y", os.time(dt))
					else
						out[#out + 1] = os.date("%B %e, %Y", os.time(dt))
					end
				end
			end
			return table.concat(out, ", ")
		else
			return ""
		end
	else
		return input_parm
	end
end

return p