Module:Message box

    From the Wikimedia Foundation Governance Wiki

    This is a meta-module that implements the message box templates {{mbox}}, {{ambox}}, {{cmbox}}, {{fmbox}}, {{imbox}}, {{ombox}}, and {{tmbox}}. It is intended to be used from Lua modules, and should not be used directly from wiki pages. If you want to use this module's functionality from a wiki page, please use the individual message box templates instead.

    Usage

    To use this module from another Lua module, first you need to load it.

    local messageBox = require('Module:Message box')
    

    To create a message box, use the main function. It takes two parameters: the first is the box type (as a string), and the second is a table containing the message box parameters.

    local box = messageBox.main( boxType, {
        param1 = param1,
        param2 = param2,
        -- More parameters...
    })
    

    There are seven available box types:

    Box type Template Purpose
    mbox {{mbox}} For message boxes to be used in multiple namespaces
    ambox {{ambox}} For article message boxes
    cmbox {{cmbox}} For category message boxes
    fmbox {{fmbox}} For interface message boxes
    imbox {{imbox}} For file namespace message boxes
    tmbox {{tmbox}} For talk page message boxes
    ombox {{ombox}} For message boxes in other namespaces

    See the template page of each box type for the available parameters.

    Usage from #invoke

    As well as the main function, this module has separate functions for each box type. They are accessed using the code {{#invoke:Message box|mbox|...}}, {{#invoke:Message box|ambox|...}}, etc. These will work when called from other modules, but they access code used to process arguments passed from #invoke, and so calling them will be less efficient than calling main.

    Technical details

    The module uses the same basic code for each of the templates listed above; the differences between each of them are configured using the data at Module:Message box/configuration. Here are the various configuration options and what they mean:

    • types - a table containing data used by the type parameter of the message box. The table keys are the values that can be passed to the type parameter, and the table values are tables containing the class and the image used by that type.
    • default - the type to use if no value was passed to the type parameter, or if an invalid value was specified.
    • showInvalidTypeError - whether to show an error if the value passed to the type parameter was invalid.
    • allowBlankParams - usually blank values are stripped from parameters passed to the module. However, whitespace is preserved for the parameters included in the allowBlankParams table.
    • allowSmall - whether a small version of the message box can be produced with "small=yes".
    • smallParam - a custom name for the small parameter. For example, if set to "left" you can produce a small message box using "small=left".
    • smallClass - the class to use for small message boxes.
    • substCheck - whether to perform a subst check or not.
    • classes - an array of classes to use with the message box.
    • imageEmptyCell - whether to use an empty td cell if there is no image set. This is used to preserve spacing for message boxes with a width of less than 100% of the screen.
    • imageEmptyCellStyle - whether empty image cells should be styled.
    • imageCheckBlank - whether "image=blank" results in no image being displayed.
    • imageSmallSize - usually, images used in small message boxes are set to 30x30px. This sets a custom size.
    • imageCellDiv - whether to enclose the image in a div enforcing a maximum image size.
    • useCollapsibleTextFields - whether to use text fields that can be collapsed, i.e. "issue", "fix", "talk", etc. Currently only used in ambox.
    • imageRightNone - whether imageright=none results in no image being displayed on the right-hand side of the message box.
    • sectionDefault - the default name for the "section" parameter. Depends on useCollapsibleTextFields.
    • allowMainspaceCategories - allow categorisation in the main namespace.
    • templateCategory - the name of a category to be placed on the template page.
    • templateCategoryRequireName - whether the name parameter is required to display the template category.
    • templateErrorCategory - the name of the error category to be used on the template page.
    • templateErrorParamsToCheck - an array of parameter names to check. If any are absent, the templateErrorCategory is applied to the template page.

    -- This is a meta-module for producing message box templates, including
    -- {{mbox}}, {{ambox}}, {{imbox}}, {{tmbox}}, {{ombox}}, {{cmbox}} and {{fmbox}}.
    
    -- Load necessary modules.
    require('Module:No globals')
    local getArgs
    local yesno = require('Module:Yesno')
    
    -- Get a language object for formatDate and ucfirst.
    local lang = mw.language.getContentLanguage()
    
    -- Define constants
    local CONFIG_MODULE = 'Module:Message box/configuration'
    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('[[Category:%s|%s]]', cat, sort)
    	else
    		cat = string.format('[[Category:%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
    
    	-- 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 = 'Template:' .. 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 {{ambox}}.
    	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 = 'This ' .. (cfg.sectionDefault or 'page')
    			elseif type(args.sect) == 'string' then
    				sect = 'This ' .. 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 = 'Relevant discussion may be found on'
    				if talkArgIsTalkPage then
    					talkText = string.format(
    						'%s [[%s|%s]].',
    						talkText,
    						talk,
    						talkTitle.prefixedText
    					)
    				else
    					talkText = string.format(
    						'%s the [[%s#%s|talk page]].',
    						talkText,
    						talkTitle.prefixedText,
    						talk
    					)
    				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(" <small class='date-container'>''(<span class='date'>%s</span>)''</small>", 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
    	if cfg.imageEmptyCellStyle then
    		self.imageEmptyCellStyle = 'border:none;padding:0px;width:1px'
    	end
    
    	-- 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('[[File:%s|%s|link=|alt=]]', self.typeImage
    				or 'Imbox notice.png', imageSize)
    		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
    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 {{Ambox/category}}.
    	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 %s %s', mainCat, preposition, date)
    			self:addCat(0, catTitle)
    			catTitle = getTitleObject('Category:' .. catTitle)
    			if not catTitle or not catTitle.exists then
    				self:addCat(0, 'Articles with invalid date parameter in template')
    			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', 'Wikipedia message box parameter needs fixing', allSort)
    	end
    	if self.isSubstituted then
    		self:addCat('all', 'Pages with incorrectly substituted templates')
    	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
    	-- [[Module:Category handler]].
    	return require('Module:Category handler')._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(
    				'Template <code>%s[[Template:%s|%s]]%s</code> has been incorrectly substituted.',
    				mw.text.nowiki('{{'), self.name, self.name, mw.text.nowiki('}}')
    			))
    	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'):css('width', '52px')
    		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')
    			:cssText(self.imageEmptyCellStyle or nil)
    	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) and not self.isSmall 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('small')
    				: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'):css('width', '52px')
    		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')
    			:css('text-align', 'center')
    			:wikitext(string.format(
    				'This message box is using an invalid "type=%s" parameter and needs fixing.',
    				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)