Module:Transclude random subpage

-- This module implements Template:Transclude random subpage. It is alpha software.

local p = {}

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

-- tracking function added by BHG 29/04/2019 -- called as subPageTrackingCategories(pages, args.max) local function subPageTrackingCategories(pages, max) local retval = ""; local availableSubPageCount = 0; local i;	local thispagetitle = mw.title.getCurrentTitle.text

-- don't track DYK etc, only selected/featured articles, biogs etc if ((string.find(pages.subpage, "/[sS]elected") == -1) and (string.find(pages.subpage, "/[fF]eatured") == -1)) then return retval end -- no tracking unless we are in Portal namespace if (mw.title.getCurrentTitle.nsText ~= "Portal") then return "" end -- no tracking if this is a subpage if ((mw.ustring.match(thispagetitle, "/") ~= nil) and (thispagetitle ~= "AC/DC")) then return retval end if (max == nil) then return "" end

-- limit checking to prevent Lua overload local myMaxCheck = 60 if tonumber(max) < myMaxCheck then myMaxCheck = tonumber(max) end for i=1,myMaxCheck do local aSubPage = mw.title.new(pages.subpage .. '/' .. i)		if (aSubPage.exists) then availableSubPageCount = availableSubPageCount + 1; end end if myMaxCheck >= tonumber(max) then if (availableSubPageCount < tonumber(max)) then retval = retval .. ""		elseif (availableSubPageCount > tonumber(max)) then retval = retval .. ""		end end -- before categorising, check what type of subpage we are categorising, and if detected, categorise images separately local subpageType = "subpages" -- generic type local subpageName = pages.subpage subpageName = mw.ustring.gsub(subpageName, "^[^/]*/", "") subpageName = mw.ustring.lower(subpageName) if ((mw.ustring.find(subpageName, "picture", 1, true) ~= nil) or		(mw.ustring.find(subpageName, "image", 1, true) ~= nil) or		(mw.ustring.find(subpageName, "panorama", 1, true) ~= nil)) then subpageType = "image subpages" end if (availableSubPageCount < 2) then retval = retval .. ""	elseif (availableSubPageCount <= 5) then retval = retval .. ""	elseif (availableSubPageCount <= 10) then retval = retval .. ""	elseif (availableSubPageCount <= 15) then retval = retval .. ""	elseif (availableSubPageCount <= 20) then retval = retval .. ""	elseif (availableSubPageCount <= 25) then retval = retval .. ""	elseif (availableSubPageCount <= 30) then retval = retval .. ""	elseif (availableSubPageCount <= 40) then retval = retval .. ""	elseif (availableSubPageCount <= 50) then retval = retval .. ""	else retval = retval .. ""	end return retval; end

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') 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 getNumberedSubpageContent(frame, pages, num) return tryExpandTemplate(		frame,		pages.subpage .. '/' .. num	) end

function p._main(args, frame) frame = frame or mw.getCurrentFrame local pages = getPages(args) local prefix = args.prefix or '' local max = args.max or 1

local ret = {} local r = getRandomNumber(max) for i = 1, (args.several or 1) do		local num = ((r + i - 1) % max) + 1 ret[#ret + 1] = prefix .. getNumberedSubpageContent(frame, pages, num) end

if args.more then ret[#ret + 1] = string.format(' %s ', pages.subpage, args.more) end if args.leftfooter then ret[#ret + 1] = string.format(' %s ', args.leftfooter) end if args.rightfooter then ret[#ret + 1] = string.format(' %s ', args.rightfooter) end

return table.concat(ret, '\n') .. subPageTrackingCategories(pages, max, args.header) end

local function makeInvokeFunction(func) return function (frame) local args = require('Module:Arguments').getArgs(frame, {			trim = false,			removeBlanks = false,			wrappers = {				'Template:Transclude random subpage',				'Template:Transclude random subpage/BHG-test',			}		}) return func(args, frame) end end

p.main = makeInvokeFunction(p._main)

return p