Module:Subject bar

local getPortalImage = require('Module:Portal').image

local p = {}

local function getArgNums(prefix, args) -- Returns a table containing the numbers of the arguments that exist for the specified prefix. For example, if the -- prefix was 'data', and 'data1', 'data2', and 'data5' exist, it would return {1, 2, 5}. local nums = {} for k, v in pairs(args) do       local num = tostring(k):match('^' .. prefix .. '([1-9]%d*)$') if num then table.insert(nums, tonumber(num)) end end table.sort(nums) return nums end

local function makeHorizontalRule local row = mw.html.create('tr') row :tag('td') :attr('colspan', '2') :tag('hr', {selfClosing = true}) return tostring(row) end

local function makeItem(image, text) local root = mw.html.create('table') root :css('float', 'left') :css('padding', '0px 5px') :tag('tr') :tag('td') :wikitext(image) :done :tag('td') :css('width', '125px') :css('text-align', 'left') :wikitext(text) return tostring(root) end

local function makeRow(items, heading, subheading, options) if #items < 1 then return end local swapHeadingSize = type(options) == 'table' and options.swapHeadingSize or false local row = mw.html.create('tr') row :tag('td') :css('width', '175px') :tag('span') :css('font-size', swapHeadingSize and '85%' or '125%') :wikitext(heading) :done :tag('br', {selfClosing = true}) :done :tag('span') :css('font-size', swapHeadingSize and '125%' or '85%') :wikitext(subheading) local cell = row:tag('td') for i, item in ipairs(items) do       local image = item[1] local text = item[2] cell :wikitext(makeItem(image, text)) end return tostring(row) end

local function makeNumberedRow(prefix, args, heading, subheading, getItemValsFunc, options) if args[prefix] then args[prefix .. '1'] = args[prefix] end local argNums = getArgNums(prefix, args) local items = {} for i, argNum in ipairs(argNums) do       local image, text = getItemValsFunc(args[prefix .. tostring(argNum)]) table.insert(items, {image, text}) end return makeRow(items, heading, subheading, options) end

function p._main(args) local rows = {}

-- Get the book row text. local bookHeading = "Books" local bookSubheading = 'View or order collections of articles' local function getBookItemVals(book) local image = '' local text = mw.ustring.format("%s", book, book) return image, text end local bookRow = makeNumberedRow('book', args, bookHeading, bookSubheading, getBookItemVals) table.insert(rows, bookRow)

-- Get the portal row text local portalHeading = "Portals" local portalSubheading = 'Access related topics' local function getPortalItemVals(portal) local image = mw.ustring.format('', getPortalImage{portal}) local text = mw.ustring.format("%s portal", portal, portal) return image, text end local portalRow = makeNumberedRow('portal', args, portalHeading, portalSubheading, getPortalItemVals) table.insert(rows, portalRow)

-- Get the sister projects row text. local sisters = { {arg = 'commons', image = 'Commons-logo.svg', prefix = 'commons', display = 'Media', from = 'Commons'}, {arg = 'species', image = 'Wikispecies-logo.svg', prefix = 'wikispecies', display = 'Species directories', from = 'Wikispecies'}, {arg = 'voy', image = 'Wikivoyage-Logo-v3-icon.svg', prefix = 'voy', display = 'Travel guides', from = 'Wikivoyage'}, {arg = 'n', image = 'Wikinews-logo.svg', prefix = 'wikinews', display = 'News stories', from = 'Wikinews'}, {arg = 'wikt', image = 'Wiktionary-logo-en.svg', prefix = 'wiktionary', postfix = 'English', display = 'Definitions', from = 'Wiktionary'}, {arg = 'b', image = 'Wikibooks-logo.svg', prefix = 'wikibooks', display = 'Textbooks', from = 'Wikibooks'}, {arg = 'q', image = 'Wikiquote-logo.svg', prefix = 'wikiquote', display = 'Quotations', from = 'Wikiquote'}, {arg = 's', image = 'Wikisource-logo.svg', prefix = 'wikisource', display = 'Source texts', from = 'Wikisource'}, {arg = 'v', image = 'Wikiversity-logo.svg', prefix = 'wikiversity', display = 'Learning resources', from = 'Wikiversity'}, {arg = 'spoken', image = 'Sound-icon.svg', prefix = 'spoken wikipedia', display = 'Listen to this page', from = 'Spoken Wikipedia'}, }   local sisterItems = {} for i, t in ipairs(sisters) do       if args[t.arg] then -- Get the image value. local image = mw.ustring.format('', t.image) -- Get the text value. local prefix = t.prefix local search = args[t.arg .. '-search'] or mw.title.getCurrentTitle.text local postfix = t.postfix postfix = postfix and ('#' .. postfix) or '' local display = t.display local from = t.from local text = mw.ustring.format(               '%s from %s',                prefix,    search,    postfix, display, from            ) if t.arg == 'spoken' then text = mw.ustring.format('%s on %s ',               				display, from, args[t.arg]                 ) end -- Add the values to the items table. table.insert(sisterItems, {image, text}) end end local sisterHeading = "Find out more on Wikipedia's"   local sisterSubheading = "Sister projects" local sisterRow = makeRow(sisterItems, sisterHeading, sisterSubheading, {swapHeadingSize = true}) table.insert(rows, sisterRow)

-- Make the table. local root = mw.html.create('table') root :addClass('noprint') :addClass('navbox') :css('background-color', '#f9f9f9') :css('border', '1px solid #aaa') :css('clear', 'both') :css('margin-bottom', '0.5em') :css('margin-top', '0.5em') :wikitext(table.concat(rows, makeHorizontalRule))

return tostring(root) end

function p.main(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 frame == mw.getCurrentFrame then origArgs = frame:getParent.args for k, v in pairs(frame.args) do           origArgs = frame.args break end else origArgs = frame end -- Remove blank arguments. local args = {} for k, v in pairs(origArgs) do       if v ~= '' then args[k] = v       end end return p._main(args) end

return p