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Denne modulen implementerer {{Portal3}}. Se malens side for bruk.

-- Denne modulen implementerer {{Portal3}}
local p = {}
local function matchImagePage(s)
	-- Finds the appropriate image subpage given a lower-case
	-- portal name plus the first letter of that portal name.
	if type(s) ~= 'string' or #s < 1 then return end
	local imagePage = 'Modul:Portal3/bilder'
	return mw.loadData(imagePage)[s]

local function getImageName(s)
	-- Gets the image name for a given string.
	if type(s) ~= 'string' or #s < 1 then
		return 'Portal-puzzle.svg'
	s = mw.ustring.lower(s)
	return matchImagePage(s) or 'Portal-puzzle.svg'
function p._portal(portals, args)
	-- This function builds the portal box used by the {{portal}} template.
	local root = mw.html.create('div')
		:addClass('noprint portal')
		:addClass(args.left and 'tleft' or 'tright')
		:css('border', 'solid #aaa 1px')
		:css('margin', args.margin or (args.left == 'yes' and '0.5em 1em 0.5em 0') or '0.5em 0 0.5em 1em')
	-- Start the table. This corresponds to the start of the wikitext table in the old [[Template:Portal]].
	local tableroot = root:tag('table')
		:css('background', '#f9f9f9')
		:css('font-size', '85%')
		:css('line-height', '110%')
		:css('max-width', '175px')
		:css('width', type(args.boxsize) == 'string' and (args.boxsize .. 'px') or nil)
	-- If no portals have been specified, display an error and add the page to a tracking category.
	if not portals[1] then
		tableroot:wikitext('<strong class="error">Ingen portaler er spesifisert: vennligst angi minst én portal</strong>[[Kategori:Portalmaler uten parameter]]')
	-- Display the portals specified in the positional arguments.
	for _, portal in ipairs(portals) do
		local image = getImageName(portal)
		-- Generate the html for the image and the portal name.
				:css('vertical-align', 'middle')
					:css('text-align', 'center')
					:wikitext(string.format('[[Fil:%s|32x28px|alt=Portalikon|class=noviewer]]', image))
					:css('padding', '0 0.2em')
					:css('vertical-align', 'middle')
					:css('font-style', 'italic')
					:css('font-weight', 'bold')
					:wikitext(string.format('[[Portal:%s|Portal:%s%s]]', portal, portal, args['break'] and '<br />' or ' '))
	return tostring(root)
function p._image(portals)
	-- Wrapper function to allow getImageName() to be accessed through #invoke.
	return getImageName(portals[1])
local function getAllImageTables()
	-- Returns an array containing all image subpages (minus aliases) as loaded by mw.loadData.
	local images = {}
	return images
function p._displayAll(portals, args)
	-- This function displays all portals that have portal images. This function is for maintenance purposes and should not be used in
	-- articles, for two reasons: 1) there are over 1500 portals with portal images, and 2) the module doesn't record how the portal
	-- names are capitalized, so the portal links may be broken.
	local lang = mw.language.getContentLanguage()
	local count = 1
	for _, imageTable in ipairs(getAllImageTables()) do
		for portal in pairs(imageTable) do
			portals[count] = lang:ucfirst(portal)
			count = count + 1
	return p._portal(portals, args)
function p._imageDupes()
	-- This function searches the image subpages to find duplicate images. If duplicate images exist, it is not necessarily a bad thing,
	-- as different portals might just happen to choose the same image. However, this function is helpful in identifying images that
	-- should be moved to a portal alias for ease of maintenance.
	local exists, dupes = {}, {}
	for _, imageTable in ipairs(getAllImageTables()) do
		for portal, image in pairs(imageTable) do
			if not exists[image] then
				exists[image] = portal
				table.insert(dupes, string.format('Bildet "[[:Fil:%s|%s]]" brukes både for portal "%s" og "%s".', image, image, exists[image], portal))
	if #dupes < 1 then
		return 'Ingen duplikatbilder funnet.'
		return 'Følgende duplikatbilder funnet:\n* ' .. table.concat(dupes, '\n* ')
local function processPortalArgs(args)
	-- This function processes a table of arguments and returns two tables: an array of portal names for processing by ipairs, and a table of
	-- the named arguments that specify style options, etc. We need to use ipairs because we want to list all the portals in the order
	-- they were passed to the template, but we also want to be able to deal with positional arguments passed explicitly, for example
	-- {{portal|2=Politics}}. The behaviour of ipairs is undefined if nil values are present, so we need to make sure they are all removed.
	args = type(args) == 'table' and args or {}
	local portals = {}
	local namedArgs = {}
	for k, v in pairs(args) do
		if type(k) == 'number' and type(v) == 'string' then -- Make sure we have no non-string portal names.
			table.insert(portals, k)
		elseif type(k) ~= 'number' then
			namedArgs[k] = v
	for i, v in ipairs(portals) do
		portals[i] = args[v]
	return portals, namedArgs
local function makeWrapper(funcName)
	-- Processes external arguments and sends them to the other functions.
	return function (frame)
		-- If called via #invoke, use the args passed into the invoking
		-- template, or the args passed to #invoke if any exist. Otherwise
		-- assume args are being passed directly in from the debug console
		-- or from another Lua module.
		local origArgs
		if type(frame.getParent) == 'function' then
			origArgs = frame:getParent().args
			for k, v in pairs(frame.args) do
				origArgs = frame.args
			origArgs = frame
		-- Trim whitespace and remove blank arguments.
		local args = {}
		for k, v in pairs(origArgs) do
			if type(v) == 'string' then
				v = mw.text.trim(v)
			if v ~= '' then
				args[k] = v
		return p[funcName](processPortalArgs(args)) -- passes two tables to func: an array of portal names, and a table of named arguments.
for _, funcName in ipairs{'portal', 'image', 'imageDupes', 'displayAll'} do
	p[funcName] = makeWrapper('_' .. funcName)
return p