Module:Wikipedia ads

--- --                        Module:Wikipedia ads -- -- This module displays a random banner-style advert for a Wikipedia project, -- page or process. It implements Template:Wikipedia ads. ---

-- Set constants local LIST_MODULE = 'Module:Wikipedia ads/list' local DATA_MODULE = 'Module:Wikipedia ads/data'

local p = {} local warnings = {}

local function addWarning(msg) table.insert(warnings, msg) end

local function makeWikilink(page, display) return string.format('%s', page, display) end

local function makeUrlLink(url, display) url = tostring(url) return string.format('[%s %s]', url, display) end

local function colorText(s, color) return string.format(' %s ', color, s) end

local function getImageData(args) -- This function gets an image data from the data module. It also tracks -- whether the image data choice was random. local data = mw.loadData(DATA_MODULE)

local function getSomeImageData(id, param) id = tonumber(id) or id		local someImageData = data.ids[id] if someImageData then return someImageData else addWarning(string.format("ID '%s' does not exist", tostring(id))) return nil end end

-- Get the image data of the ad to display. local imageData, isRandom if args.ad then imageData = getSomeImageData(args.ad, 'ad') if not imageData then return nil end isRandom = false else local imageDataArray, length if args[1] then imageDataArray = {} for i, id in ipairs(args) do				imageDataArray[#imageDataArray + 1] = getSomeImageData(id, i)			end length = #imageDataArray if length < 1 then return nil end else imageDataArray = data.list length = data.noAds end assert(length >= 1, string.format( 'no ads were found in %s', DATA_MODULE ))		isRandom = length > 1 if isRandom then math.randomseed(os.clock * 1000000000) imageData = imageDataArray[math.random(length)] else imageData = imageDataArray[1] end end

-- Check that the image data has the required fields. We have already -- checked the ID in the data module. for i, field in ipairs{'image', 'link'} do		assert(imageData[field], string.format( "Invalid image data in %s; table with ID '%s' has no '%s' field", LIST_MODULE, tostring(imageData.id), field ))	end

return imageData, isRandom end

local function renderAd(imageData, args, title, isRandom) local width = tonumber(args.width) or 468 local maxWidth = width + 9 local linkColor = args.linkcolor or '#002bb8'

-- Table root local root = mw.html.create('table') root :addClass('plainlinks qxz-ads') :css('color', args.color or '#555555') :css('border', 'none') :css('background', args.background) :css('line-height', '1em') :css('font-size', '90%') :css('display', 'block') :css('overflow', 'auto') :css('max-width', maxWidth .. 'px') if args.float then root:css('float', args.float) root:css('margin', args.margin) else root:css('margin', args.margin or '0 auto') end -- Image row root :tag('tr') :tag('td') :attr('colspan', 2) :css('border', 'none') :wikitext(string.format( '',					imageData.image, width, imageData.link, imageData.link ))	-- Links row if not args.nolinks then local linksRow = root:tag('tr')

-- Wikipedia ads link linksRow :tag('td') :css('border', 'none') :wikitext(makeWikilink( 'Template:Wikipedia ads', colorText('Wikipedia ads', linkColor) ))

-- File info, purge and ID		local links = {} links[#links + 1] = makeWikilink(			':File:' .. imageData.image,			colorText('file info', linkColor)		) if args.showpurge or isRandom then links[#links + 1] = makeUrlLink(				title:fullUrl{action = 'purge'},				colorText('show another', linkColor)			) end links[#links + 1] = '#' .. tostring(imageData.id) linksRow :tag('td') :css('text-align', 'right') :css('border', 'none') :wikitext(table.concat(links, ' – ')) end

return tostring(root) end

local function renderWarnings(args, title) if #warnings < 1 then return nil end

-- Error list local root = mw.html.create('div') :css('width', '468px') if args.float then root :css('float', args.float) :css('clear', 'both') else root:css('margin', '0 auto') end local list = root:tag('ul') :addClass('error') :css('font-size', '90%') for _, msg in ipairs(warnings) do		list :tag('li') :wikitext(string.format( 'Wikipedia ads error: %s (help).', msg ))	end

-- Category. We use Module:Category handler for its blacklist. local mCatHandler = require('Module:Category handler') local category = mCatHandler._main{ all = '', nocat = args.nocat, page = title and title.prefixedText }

local ret = tostring(root) if category then ret = ret .. category end return ret end

function p._main(args, title) title = title or mw.title.getCurrentTitle local ret = {} local imageData, isRandom = getImageData(args) if imageData then ret[#ret + 1] = renderAd(imageData, args, title, isRandom) end ret[#ret + 1] = renderWarnings(args, title) if #ret > 0 then return table.concat(ret) else return nil end end

function p.main(frame) local args = require('Module:Arguments').getArgs(frame, {		wrappers = 'Template:Wikipedia ads'	}) return p._main(args) end

return p