Module:Wd

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

local p = {}

local function unknownDatatypeError(type)
	return "<strong class=\"error\">Unknown or unsupported datatype '" .. type .. "'</strong>"
end

local function getValue(snak)
	if snak.snaktype ~= 'value' then return nil end
	
	if snak.datavalue.type == 'string' then
		return snak.datavalue.value
	elseif snak.datavalue.type == 'monolingualtext' then
		if snak.datavalue.value['language'] == "en" then
			return snak.datavalue.value['text']
		else
			return nil
		end
	elseif snak.datavalue.type == 'quantity' then
		-- strip + signs from front
		return mw.ustring.gsub(snak.datavalue.value['amount'], "\+(.+)", "%1")
	elseif snak.datavalue.type == 'wikibase-entityid' then
		return mw.wikibase.label("Q" .. snak.datavalue.value['numeric-id'])
	else
		return unknownDatatypeError(snak.datavalue.type)
	end
end

local function getRawValue(snak)
	if snak.snaktype ~= 'value' then return nil end
	
	if snak.datavalue.type == 'wikibase-entityid' then
		return "Q" .. snak.datavalue.value['numeric-id']
	else
		return getValue(snak)
	end
end

local function snakEqualsValue(snak, value)
	local snakValue = getRawValue(snak)
	
	if snakValue and snak.datavalue.type == 'wikibase-entityid' then value = value:upper() end
	
	return snakValue == value
end

p.property = function(frame)
	local entity, propertyID, claims
	local linked = false
	local nextArg = mw.text.trim(frame.args[1] or "")
	local nextIndex = 2
	
	if nextArg == "linked" then
		linked = true
		nextArg = mw.text.trim(frame.args[nextIndex] or "")
		nextIndex = nextIndex + 1
	end
	
	if nextArg:sub(1,1):upper() == "Q" then
		entity = mw.wikibase.getEntity(nextArg)
		propertyID = mw.text.trim(frame.args[nextIndex] or "")
	else
		entity = mw.wikibase.getEntity()
		propertyID = nextArg
	end
	
	if entity and entity.claims then claims = entity.claims[propertyID] end
	if claims then
		local out = {}
		for k, v in pairs(claims) do
			if v.mainsnak.snaktype == 'value' then
				if linked and v.mainsnak.datavalue.type == 'wikibase-entityid' then
					local itemID = "Q" .. v.mainsnak.datavalue.value['numeric-id']
					local linkTarget = mw.wikibase.sitelink(itemID)
					local linkName = mw.wikibase.label(itemID)  -- == getValue(v.mainsnak)
					
					if linkTarget then
						out[#out + 1] = "[[" .. linkTarget .. "|" .. (linkName or linkTarget) .. "]]"
					elseif linkName then
						out[#out + 1] = linkName
					end
				else
					local value = getValue(v.mainsnak)
					if value then out[#out + 1] = value end
				end
			end
		end
		return table.concat(out, ", ")
	else
		return ""
	end
end

p.qualifier = function(frame)
	local entity, propertyID, propertyValue, qualifierID, claims
	local linked = false
	local nextArg = mw.text.trim(frame.args[1] or "")
	local nextIndex = 2
	
	if nextArg == "linked" then
		linked = true
		nextArg = mw.text.trim(frame.args[nextIndex] or "")
		nextIndex = nextIndex + 1
	end
	
	if nextArg:sub(1,1):upper() == "Q" then
		entity = mw.wikibase.getEntity(nextArg)
		propertyID = mw.text.trim(frame.args[nextIndex] or "")
		nextIndex = nextIndex + 1
	else
		entity = mw.wikibase.getEntity()
		propertyID = nextArg
	end
	
	nextArg = mw.text.trim(frame.args[nextIndex] or "")
	nextIndex = nextIndex + 1
	
	if nextArg:sub(1,1):upper() == "P" then
		propertyValue = nil
		qualifierID = nextArg
	else
		-- Escaping: if the first character is '\' followed by 'P' or '\' (i.e. "\P" or "\\") then remove the '\'
		if nextArg:sub(1,2):upper() == "\\P" or nextArg:sub(1,2) == "\\\\" then nextArg = nextArg:sub(2) end
		propertyValue = nextArg
		qualifierID = mw.text.trim(frame.args[nextIndex] or "")
		nextIndex = nextIndex + 1
	end
	
	if entity and entity.claims then claims = entity.claims[propertyID] end
	if claims then
		local out = {}
		for k, v in pairs(claims) do
			if (not propertyValue or (v.mainsnak.snaktype == 'value' and snakEqualsValue(v.mainsnak, propertyValue))) and v.qualifiers[qualifierID] then
				for k2, v2 in pairs(v.qualifiers[qualifierID]) do
					if v2.snaktype == 'value' then
						if linked and v2.datavalue.type == 'wikibase-entityid' then
							local itemID = "Q" .. v2.datavalue.value['numeric-id']
							local linkTarget = mw.wikibase.sitelink(itemID)
							local linkName = mw.wikibase.label(itemID)  -- == getValue(v2)
							
							if linkTarget then
								out[#out + 1] = "[[" .. linkTarget .. "|" .. (linkName or linkTarget) .. "]]"
							elseif linkName then
								out[#out + 1] = linkName
							end
						else
							local value = getValue(v2)
							if value then out[#out + 1] = value end
						end
					end
				end
			end
		end
		return table.concat(out, ", ")
	else
		return ""
	end
end

p.label = function(frame)
	local linked = false
	local nextArg = mw.text.trim(frame.args[1] or "")
	local nextIndex = 2
	
	if nextArg == "linked" then
		linked = true
		nextArg = mw.text.trim(frame.args[nextIndex] or "")
		nextIndex = nextIndex + 1
	end
	
	if nextArg then
		if linked and nextArg:sub(1,1):upper() == "Q" then
			local linkTarget = mw.wikibase.sitelink(nextArg)
			local linkName = mw.wikibase.label(nextArg)
			
			if linkTarget then
				return "[[" .. linkTarget .. "|" .. (linkName or linkTarget) .. "]]"
			else
				return linkName
			end
		else
			return mw.wikibase.label(nextArg)
		end
	else
		return mw.wikibase.label()
	end
end

return p