Module:Random portal component

-- This module implements Template:Random portal component

local p = {}

local mRandom = require('Module:Random') local currentTitle = mw.title.getCurrentTitle

local function getRandomNumber(max) -- gets a random integer between 1 and max; max defaults to 1 return mRandom.number{max or 1} end

local function expandArg(args, key) -- Emulate how unspecified template parameters appear in wikitext. If the -- specified argument exists, its value is returned, and if not the argument -- name is returned inside triple curly braces. local val = args[key] if val then return val else return string.format('', key) end end

local function getPages(args) local pages = {} pages.root = args.rootpage or currentTitle.prefixedText pages.subpage = pages.root .. '/' .. expandArg(args, 'subpage') pages.random = pages.subpage .. '/' .. getRandomNumber(args.max) return pages end

local function tryExpandTemplate(frame, title, args) local success, result = pcall(frame.expandTemplate, frame, {title = title, args = args}) if success then return result else local msg = string.format(			' The page "%s" does not exist. ',			title		) if mw.title.getCurrentTitle.namespace == 100 then -- is in the portal namespace msg = msg .. ''		end return msg end end

local function getHeader(frame, pages, header) return tryExpandTemplate(		frame,		pages.root .. '/box-header',		{header, pages.random}	) end

local function getRandomSubpageContent(frame, pages) return tryExpandTemplate(		frame,		pages.random	) end

local function getFooter(frame, pages, link) return tryExpandTemplate(		frame,		pages.root .. '/box-footer',		{link}	) end

function p._main(args, frame) frame = frame or mw.getCurrentFrame local pages = getPages(args)

local ret = {} ret[#ret + 1] = getHeader(frame, pages, args.header or 'subpage') ret[#ret + 1] = getRandomSubpageContent(frame, pages) if not args.footer or not args.footer:find('%S') then ret[#ret + 1] = ' ' else ret[#ret + 1] = getFooter(frame, pages, string.format( '%s', pages.subpage, expandArg(args, 'footer') ))	end

return table.concat(ret, '\n') end

function p._nominate(args, frame) frame = frame or mw.getCurrentFrame local pages = getPages(args) local ret = {} ret[#ret + 1] = getHeader(frame, pages, expandArg(args, 'header')) ret[#ret + 1] = getRandomSubpageContent(frame, pages) ret[#ret + 1] = getFooter(frame, pages, string.format( 'Suggest • %s ', expandArg(args, 'subpage'), pages.subpage, args.footer or 'Archive' ))

return table.concat(ret, '\n') end

local function makeInvokeFunction(func) return function (frame) local args = require('Module:Arguments').getArgs(frame, {			trim = false,			removeBlanks = false,			wrappers = {				'Template:Random portal component',				'Template:Random portal component with nominate'			}		}) return func(args, frame) end end

p.main = makeInvokeFunction(p._main) p.nominate = makeInvokeFunction(p._nominate)

return p