require('strict') local getArgs local yesno = require('Module:Yesno') local lang = mw.language.getContentLanguage()  local CONFIG_MODULE = 'মডিউল:বার্তার বাক্স/রূপরেখা' local DEMOSPACES = {talk = 'tmbox', image = 'imbox', file = 'imbox', category = 'cmbox', article = 'ambox', main = 'ambox'}  -- Helper functions  local function getTitleObject(...) 	-- Get the title object, passing the function through pcall 	-- in case we are over the expensive function count limit. 	local success, title = pcall(mw.title.new, ...) 	if success then 		return title 	end end  local function union(t1, t2) 	-- Returns the union of two arrays. 	local vals = {} 	for i, v in ipairs(t1) do 		vals[v] = true 	end 	for i, v in ipairs(t2) do 		vals[v] = true 	end 	local ret = {} 	for k in pairs(vals) do 		table.insert(ret, k) 	end 	table.sort(ret) 	return ret end  local function getArgNums(args, prefix) 	local nums = {} 	for k, v in pairs(args) do 		local num = mw.ustring.match(tostring(k), '^' .. prefix .. '([1-9]%d*)$') 		if num then 			table.insert(nums, tonumber(num)) 		end 	end 	table.sort(nums) 	return nums end  -- Box class definition  local MessageBox = {} MessageBox.__index = MessageBox  function MessageBox.new(boxType, args, cfg) 	args = args or {} 	local obj = {}  	-- Set the title object and the namespace. 	obj.title = getTitleObject(args.page) or mw.title.getCurrentTitle()  	-- Set the config for our box type. 	obj.cfg = cfg[boxType] 	if not obj.cfg then 		local ns = obj.title.namespace 		-- boxType is "mbox" or invalid input 		if args.demospace and args.demospace ~=  then 			-- implement demospace parameter of mbox 			local demospace = string.lower(args.demospace) 			if DEMOSPACES[demospace] then 				-- use template from DEMOSPACES 				obj.cfg = cfg[DEMOSPACES[demospace]] 			elseif string.find( demospace, 'talk' ) then 				-- demo as a talk page 				obj.cfg = cfg.tmbox 			else 				-- default to ombox 				obj.cfg = cfg.ombox 			end 		elseif ns == 0 then 			obj.cfg = cfg.ambox -- main namespace 		elseif ns == 6 then 			obj.cfg = cfg.imbox -- file namespace 		elseif ns == 14 then 			obj.cfg = cfg.cmbox -- category namespace 		else 			local nsTable = mw.site.namespaces[ns] 			if nsTable and nsTable.isTalk then 				obj.cfg = cfg.tmbox -- any talk namespace 			else 				obj.cfg = cfg.ombox -- other namespaces or invalid input 			end 		end 	end  	-- Set the arguments, and remove all blank arguments except for the ones 	-- listed in cfg.allowBlankParams. 	do 		local newArgs = {} 		for k, v in pairs(args) do 			if v ~=  then 				newArgs[k] = v 			end 		end 		for i, param in ipairs(obj.cfg.allowBlankParams or {}) do 			newArgs[param] = args[param] 		end 		obj.args = newArgs 	end  	-- Define internal data structure. 	obj.categories = {} 	obj.classes = {} 	-- For lazy loading of Module:Category handler. 	obj.hasCategories = false  	return setmetatable(obj, MessageBox) end  function MessageBox:addCat(ns, cat, sort) 	if not cat then 		return nil 	end 	if sort then 		cat = string.format('%s', cat, sort) 	else 		cat = string.format('বিষয়শ্রেণী:%s', cat) 	end 	self.hasCategories = true 	self.categories[ns] = self.categories[ns] or {} 	table.insert(self.categories[ns], cat) end  function MessageBox:addClass(class) 	if not class then 		return nil 	end 	table.insert(self.classes, class) end  function MessageBox:setParameters() 	local args = self.args 	local cfg = self.cfg  	-- Get type data. 	self.type = args.type 	local typeData = cfg.types[self.type] 	self.invalidTypeError = cfg.showInvalidTypeError 		and self.type 		and not typeData 	typeData = typeData or cfg.types[cfg.default] 	self.typeClass = typeData.class 	self.typeImage = typeData.image 	self.typeImageNeedsLink = typeData.imageNeedsLink  	-- Find if the box has been wrongly substituted. 	self.isSubstituted = cfg.substCheck and args.subst == 'SUBST'  	-- Find whether we are using a small message box. 	self.isSmall = cfg.allowSmall and ( 		cfg.smallParam and args.small == cfg.smallParam 		or not cfg.smallParam and yesno(args.small) 	)  	-- Add attributes, classes and styles. 	self.id = args.id 	self.name = args.name 	if self.name then 		self:addClass('box-' .. string.gsub(self.name,' ','_')) 	end 	if yesno(args.plainlinks) ~= false then 		self:addClass('plainlinks') 	end 	for _, class in ipairs(cfg.classes or {}) do 		self:addClass(class) 	end 	if self.isSmall then 		self:addClass(cfg.smallClass or 'mbox-small') 	end 	self:addClass(self.typeClass) 	self:addClass(args.class) 	self.style = args.style 	self.attrs = args.attrs  	-- Set text style. 	self.textstyle = args.textstyle  	-- Find if we are on the template page or not. This functionality is only 	-- used if useCollapsibleTextFields is set, or if both cfg.templateCategory 	-- and cfg.templateCategoryRequireName are set. 	self.useCollapsibleTextFields = cfg.useCollapsibleTextFields 	if self.useCollapsibleTextFields 		or cfg.templateCategory 		and cfg.templateCategoryRequireName 	then 		if self.name then 			local templateName = mw.ustring.match( 				self.name, 				'^[tT][eE][mM][pP][lL][aA][tT][eE][%s_]*:[%s_]*(.*)$' 			) or self.name 			templateName = 'টেমপ্লেট:' .. templateName 			self.templateTitle = getTitleObject(templateName) 		end 		self.isTemplatePage = self.templateTitle 			and mw.title.equals(self.title, self.templateTitle) 	end 	 	-- Process data for collapsible text fields. At the moment these are only 	-- used in . 	if self.useCollapsibleTextFields then 		-- Get the self.issue value. 		if self.isSmall and args.smalltext then 			self.issue = args.smalltext 		else 			local sect 			if args.sect ==  then 				sect = 'এই ' .. (cfg.sectionDefault or 'পাতাটি') 			elseif type(args.sect) == 'string' then 				sect = 'এই ' .. args.sect 			end 			local issue = args.issue 			issue = type(issue) == 'string' and issue ~=  and issue or nil 			local text = args.text 			text = type(text) == 'string' and text or nil 			local issues = {} 			table.insert(issues, sect) 			table.insert(issues, issue) 			table.insert(issues, text) 			self.issue = table.concat(issues, ' ') 		end  		-- Get the self.talk value. 		local talk = args.talk 		-- Show talk links on the template page or template subpages if the talk 		-- parameter is blank. 		if talk == 			and self.templateTitle 			and ( 				mw.title.equals(self.templateTitle, self.title) 				or self.title:isSubpageOf(self.templateTitle) 			) 		then 			talk = '#' 		elseif talk ==  then 			talk = nil 		end 		if talk then 			-- If the talk value is a talk page, make a link to that page. Else 			-- assume that it's a section heading, and make a link to the talk 			-- page of the current page with that section heading. 			local talkTitle = getTitleObject(talk) 			local talkArgIsTalkPage = true 			if not talkTitle or not talkTitle.isTalkPage then 				talkArgIsTalkPage = false 				talkTitle = getTitleObject( 					self.title.text, 					mw.site.namespaces[self.title.namespace].talk.id 				) 			end 			if talkTitle and talkTitle.exists then                 local talkText                 if self.isSmall then                     local talkLink = talkArgIsTalkPage and talk or (talkTitle.prefixedText .. '#' .. talk)                     talkText = string.format('(আলোচনা)', talkLink)                 else                     talkText = 'প্রাসঙ্গিক আলোচনা'                     if talkArgIsTalkPage then                         talkText = string.format(                             '%s %s পাতায় পাওয়া যেতে পারে।',                             talkText,                             talk,                             talkTitle.prefixedText                         )                     else                         talkText = string.format(                             '%s আলাপ পাতায় পাওয়া যেতে পারে।',                             talkText,                             talkTitle.prefixedText,                             talk                         )                     end                 end 				self.talk = talkText 			end 		end  		-- Get other values. 		self.fix = args.fix ~=  and args.fix or nil 		local date 		if args.date and args.date ~=  then 			date = args.date 		elseif args.date ==  and self.isTemplatePage then 			date = lang:formatDate('F Y') 		end 		if date then 			self.date = string.format(" (%s)", date) 		end 		self.info = args.info 		if yesno(args.removalnotice) then 			self.removalNotice = cfg.removalNotice 		end 	end  	-- Set the non-collapsible text field. At the moment this is used by all box 	-- types other than ambox, and also by ambox when small=yes. 	if self.isSmall then 		self.text = args.smalltext or args.text 	else 		self.text = args.text 	end  	-- Set the below row. 	self.below = cfg.below and args.below  	-- General image settings. 	self.imageCellDiv = not self.isSmall and cfg.imageCellDiv 	self.imageEmptyCell = cfg.imageEmptyCell  	-- Left image settings. 	local imageLeft = self.isSmall and args.smallimage or args.image 	if cfg.imageCheckBlank and imageLeft ~= 'blank' and imageLeft ~= 'none' 		or not cfg.imageCheckBlank and imageLeft ~= 'none' 	then 		self.imageLeft = imageLeft 		if not imageLeft then 			local imageSize = self.isSmall 				and (cfg.imageSmallSize or '30x30px') 				or '40x40px' 			self.imageLeft = string.format('%s%s|alt=', self.typeImage 				or 'Information icon4.svg', imageSize, self.typeImageNeedsLink and "" or "|link=" ) 		end 	end  	-- Right image settings. 	local imageRight = self.isSmall and args.smallimageright or args.imageright 	if not (cfg.imageRightNone and imageRight == 'none') then 		self.imageRight = imageRight 	end 	 	-- set templatestyles 	self.base_templatestyles = cfg.templatestyles 	self.templatestyles = args.templatestyles end  function MessageBox:setMainspaceCategories() 	local args = self.args 	local cfg = self.cfg  	if not cfg.allowMainspaceCategories then 		return nil 	end  	local nums = {} 	for _, prefix in ipairs{'cat', 'category', 'all'} do 		args[prefix .. '1'] = args[prefix] 		nums = union(nums, getArgNums(args, prefix)) 	end  	-- The following is roughly equivalent to the old . 	local date = args.date 	date = type(date) == 'string' and date 	local preposition = 'from' 	for _, num in ipairs(nums) do 		local mainCat = args['cat' .. tostring(num)] 			or args['category' .. tostring(num)] 		local allCat = args['all' .. tostring(num)] 		mainCat = type(mainCat) == 'string' and mainCat 		allCat = type(allCat) == 'string' and allCat 		if mainCat and date and date ~=  then 			local catTitle = string.format('%s', mainCat) -- preposition, date যোগ করবেন না। মাস অনুসারে বাংলা উইকিতে রক্ষণাবেক্ষণ করা কষ্টকর। 			self:addCat(0, catTitle) 			catTitle = getTitleObject('বিষয়শ্রেণী:' .. catTitle) 			if not catTitle or not catTitle.exists then 				self:addCat(0, 'টেমপ্লেটে অবৈধ তারিখ প্যারামিটারসহ নিবন্ধসমূহ') 			end 		elseif mainCat and (not date or date == ) then 			self:addCat(0, mainCat) 		end 		if allCat then 			self:addCat(0, allCat) 		end 	end end  function MessageBox:setTemplateCategories() 	local args = self.args 	local cfg = self.cfg  	-- Add template categories. 	if cfg.templateCategory then 		if cfg.templateCategoryRequireName then 			if self.isTemplatePage then 				self:addCat(10, cfg.templateCategory) 			end 		elseif not self.title.isSubpage then 			self:addCat(10, cfg.templateCategory) 		end 	end  	-- Add template error categories. 	if cfg.templateErrorCategory then 		local templateErrorCategory = cfg.templateErrorCategory 		local templateCat, templateSort 		if not self.name and not self.title.isSubpage then 			templateCat = templateErrorCategory 		elseif self.isTemplatePage then 			local paramsToCheck = cfg.templateErrorParamsToCheck or {} 			local count = 0 			for i, param in ipairs(paramsToCheck) do 				if not args[param] then 					count = count + 1 				end 			end 			if count > 0 then 				templateCat = templateErrorCategory 				templateSort = tostring(count) 			end 			if self.categoryNums and #self.categoryNums > 0 then 				templateCat = templateErrorCategory 				templateSort = 'C' 			end 		end 		self:addCat(10, templateCat, templateSort) 	end end  function MessageBox:setAllNamespaceCategories() 	-- Set categories for all namespaces. 	if self.invalidTypeError then 		local allSort = (self.title.namespace == 0 and 'Main:' or ) .. self.title.prefixedText 		self:addCat('all', 'উইকিপিডিয়া বার্তা বাক্স প্যারামিটার ঠিক করা প্রয়োজন', allSort) 	end 	if self.isSubstituted then 		self:addCat('all', 'ভুলভাবে উপকল্পিত টেমপ্লেটসহ পাতা') 	end end  function MessageBox:setCategories() 	if self.title.namespace == 0 then 		self:setMainspaceCategories() 	elseif self.title.namespace == 10 then 		self:setTemplateCategories() 	end 	self:setAllNamespaceCategories() end  function MessageBox:renderCategories() 	if not self.hasCategories then 		-- No categories added, no need to pass them to Category handler so, 		-- if it was invoked, it would return the empty string. 		-- So we shortcut and return the empty string. 		return "" 	end 	-- Convert category tables to strings and pass them through 	-- মডিউল:বিষয়শ্রেণী পরিচালনাকারী. 	return require('মডিউল:বিষয়শ্রেণী পরিচালনাকারী')._main{ 		main = table.concat(self.categories[0] or {}), 		template = table.concat(self.categories[10] or {}), 		all = table.concat(self.categories.all or {}), 		nocat = self.args.nocat, 		page = self.args.page 	} end  function MessageBox:export() 	local root = mw.html.create()  	-- Add the subst check error. 	if self.isSubstituted and self.name then 		root:tag('b') 			:addClass('error') 			:wikitext(string.format( 				'%s%s%s টেমপ্লেটটি ভুলভাবে উপকল্পন করা হয়েছে।', 				mw.text.nowiki('') 			)) 	end  	local frame = mw.getCurrentFrame() 	root:wikitext(frame:extensionTag{ 		name = 'templatestyles', 		args = { src = self.base_templatestyles }, 	}) 	-- Add support for a single custom templatestyles sheet. Undocumented as 	-- need should be limited and many templates using mbox are substed; we 	-- don't want to spread templatestyles sheets around to arbitrary places 	if self.templatestyles then 		root:wikitext(frame:extensionTag{ 			name = 'templatestyles', 			args = { src = self.templatestyles }, 		}) 	end  	-- Create the box table. 	local boxTable = root:tag('table') 	boxTable:attr('id', self.id or nil) 	for i, class in ipairs(self.classes or {}) do 		boxTable:addClass(class or nil) 	end 	boxTable 		:cssText(self.style or nil) 		:attr('role', 'presentation')  	if self.attrs then 		boxTable:attr(self.attrs) 	end  	-- Add the left-hand image. 	local row = boxTable:tag('tr') 	if self.imageLeft then 		local imageLeftCell = row:tag('td'):addClass('mbox-image') 		if self.imageCellDiv then 			-- If we are using a div, redefine imageLeftCell so that the image 			-- is inside it. Divs use style="width: 52px;", which limits the 			-- image width to 52px. If any images in a div are wider than that, 			-- they may overlap with the text or cause other display problems. 			imageLeftCell = imageLeftCell:tag('div'):addClass('mbox-image-div') 		end 		imageLeftCell:wikitext(self.imageLeft or nil) 	elseif self.imageEmptyCell then 		-- Some message boxes define an empty cell if no image is specified, and 		-- some don't. The old template code in templates where empty cells are 		-- specified gives the following hint: "No image. Cell with some width 		-- or padding necessary for text cell to have 100% width." 		row:tag('td') 			:addClass('mbox-empty-cell') 	end  	-- Add the text. 	local textCell = row:tag('td'):addClass('mbox-text') 	if self.useCollapsibleTextFields then 		-- The message box uses advanced text parameters that allow things to be 		-- collapsible. At the moment, only ambox uses this. 		textCell:cssText(self.textstyle or nil) 		local textCellDiv = textCell:tag('div') 		textCellDiv 			:addClass('mbox-text-span') 			:wikitext(self.issue or nil) 		if (self.talk or self.fix) then 			textCellDiv:tag('span') 				:addClass('hide-when-compact') 				:wikitext(self.talk and (' ' .. self.talk) or nil) 				:wikitext(self.fix and (' ' .. self.fix) or nil) 		end 		textCellDiv:wikitext(self.date and (' ' .. self.date) or nil) 		if self.info and not self.isSmall then 			textCellDiv 				:tag('span') 				:addClass('hide-when-compact') 				:wikitext(self.info and (' ' .. self.info) or nil) 		end 		if self.removalNotice then 			textCellDiv:tag('span') 				:addClass('hide-when-compact') 				:tag('i') 					:wikitext(string.format(" (%s)", self.removalNotice)) 		end 	else 		-- Default text formatting - anything goes. 		textCell 			:cssText(self.textstyle or nil) 			:wikitext(self.text or nil) 	end  	-- Add the right-hand image. 	if self.imageRight then 		local imageRightCell = row:tag('td'):addClass('mbox-imageright') 		if self.imageCellDiv then 			-- If we are using a div, redefine imageRightCell so that the image 			-- is inside it. 			imageRightCell = imageRightCell:tag('div'):addClass('mbox-image-div') 		end 		imageRightCell 			:wikitext(self.imageRight or nil) 	end  	-- Add the below row. 	if self.below then 		boxTable:tag('tr') 			:tag('td') 				:attr('colspan', self.imageRight and '3' or '2') 				:addClass('mbox-text') 				:cssText(self.textstyle or nil) 				:wikitext(self.below or nil) 	end  	-- Add error message for invalid type parameters. 	if self.invalidTypeError then 		root:tag('div') 			:addClass('mbox-invalid-type') 			:wikitext(string.format( 				'এই বার্তা বাক্স একটি অবৈধ "type=%s" প্যারামিটার ব্যবহার করছে এবং তা ঠিক করা প্রয়োজন।', 				self.type or '' 			)) 	end  	-- Add categories. 	root:wikitext(self:renderCategories() or nil)  	return tostring(root) end  -- Exports  local p, mt = {}, {}  function p._exportClasses() 	-- For testing. 	return { 		MessageBox = MessageBox 	} end  function p.main(boxType, args, cfgTables) 	local box = MessageBox.new(boxType, args, cfgTables or mw.loadData(CONFIG_MODULE)) 	box:setParameters() 	box:setCategories() 	return box:export() end  function mt.__index(t, k) 	return function (frame) 		if not getArgs then 			getArgs = require('Module:Arguments').getArgs 		end 		return t.main(k, getArgs(frame, {trim = false, removeBlanks = false})) 	end end  return setmetatable(p, mt)