Module:Protection banner: Difference between revisions

    From Nonbinary Wiki
    (make makeFullUrl a local helper function)
    (simplify _substituteParameters)
    Line 350: Line 350:
    function Blurb:_substituteParameters(msg)
    function Blurb:_substituteParameters(msg)
    if not self._params then
    if not self._params then
    local params, parameterFuncs = {}, {}
    local parameterFuncs = {}
    setmetatable(params, {
    __index = function (t, k)
    local param
    if parameterFuncs[k] then
    param = parameterFuncs[k](self)
    end
    param = param or ''
    params[k] = param
    return param
    end
    })


    parameterFuncs.CURRENTVERSION    = self._makeCurrentVersionParameter
    parameterFuncs.CURRENTVERSION    = self._makeCurrentVersionParameter
    Line 383: Line 372:
    parameterFuncs.VANDAL            = self._makeVandalTemplateParameter
    parameterFuncs.VANDAL            = self._makeVandalTemplateParameter
    self._params = params
    self._params = setmetatable({}, {
    __index = function (t, k)
    local param
    if parameterFuncs[k] then
    param = parameterFuncs[k](self)
    end
    param = param or ''
    t[k] = param
    return param
    end
    })
    end
    end

    Revision as of 18:21, 29 June 2014

    Documentation for this module may be created at Module:Protection banner/doc

    -- This module implements {{pp-meta}} and its daughter templates such as
    -- {{pp-dispute}}, {{pp-vandalism}} and {{pp-sock}}.
    
    -- Initialise necessary modules.
    require('Module:No globals')
    local class = require('Module:Middleclass').class
    local newFileLink = require('Module:File link').new
    local effectiveProtectionLevel = require('Module:Effective protection level')._main
    local yesno = require('Module:Yesno')
    
    -- Lazily initialise modules and objects we don't always need.
    local getArgs, makeMessageBox, lang
    
    --------------------------------------------------------------------------------
    -- Helper functions
    --------------------------------------------------------------------------------
    
    local function makeCategoryLink(cat)
    	if cat then
    		return string.format(
    			'[[%s:%s]]',
    			mw.site.namespaces[14].name,
    			cat
    		)
    	else
    		return ''
    	end
    end
    
    -- Validation function for the expiry and the protection date
    local function validateDate(dateString, dateType)
    	lang = lang or mw.language.getContentLanguage()
    	local success, result = pcall(lang.formatDate, lang, 'U', dateString)
    	if success then
    		result = tonumber(result)
    		if result then
    			return result
    		end
    	end
    	error(string.format(
    		'invalid %s ("%s")',
    		dateType,
    		tostring(dateString)
    	))
    end
    
    local function makeFullUrl(page, query, display)
    	return string.format(
    		'[%s %s]',
    		tostring(mw.uri.fullUrl(page, query)),
    		display
    	)
    end
    
    --------------------------------------------------------------------------------
    -- Protection class
    --------------------------------------------------------------------------------
    
    local Protection = class('Protection')
    
    Protection.supportedActions = {
    	create = true,
    	edit = true,
    	move = true,
    	autoreview = true
    }
    
    Protection.bannerConfigFields = {
    	'text',
    	'explanation',
    	'tooltip',
    	'alt',
    	'link',
    	'image'
    }
    
    function Protection:initialize(args, cfg, title)
    	self._cfg = cfg
    	self.title = title or mw.title.getCurrentTitle()
    
    	-- Set action
    	if not args.action then
    		self.action = 'edit'
    	elseif self.supportedActions[args.action] then
    		self.action = args.action
    	else
    		error('Unsupported action ' .. args.action, 2)
    	end
    
    	-- Set level
    	self.level = effectiveProtectionLevel(self.action, self.title)
    	if self.level == 'accountcreator' then
    		-- Lump titleblacklisted pages in with template-protected pages,
    		-- since templateeditors can do both.
    		self.level = 'templateeditor'
    	elseif not self.level or (self.action == 'move' and self.level == 'autoconfirmed') then
    		-- Users need to be autoconfirmed to move pages anyway, so treat
    		-- semi-move-protected pages as unprotected.
    		self.level = '*'
    	end
    
    	-- Set expiry
    	if args.expiry then
    		if cfg.indefStrings[args.expiry] then
    			self.expiry = 'indef'
    		elseif type(args.expiry) == 'number' then
    			self.expiry = args.expiry
    		else
    			self.expiry = validateDate(args.expiry, 'expiry date')
    		end
    	end
    
    	-- Set reason
    	do
    		local reason = args.reason or args[1]
    		if reason then
    			self.reason = reason:lower()
    		end
    	end
    
    	-- Set protection date
    	self.protectionDate = validateDate(args.date, 'protection date')
    	
    	-- Set banner config
    	do
    		self.bannerConfig = {}
    		local configTables = {}
    		if cfg.banners[self.action] then
    			configTables[#configTables + 1] = cfg.banners[self.action][self.reason]
    		end
    		if cfg.defaultBanners[self.action] then
    			configTables[#configTables + 1] = cfg.defaultBanners[self.action][self.level]
    			configTables[#configTables + 1] = cfg.defaultBanners[self.action].default
    		end
    		configTables[#configTables + 1] = cfg.masterBanner
    		for i, field in ipairs(self.bannerConfigFields) do
    			for j, t in ipairs(configTables) do
    				if t[field] then
    					self.bannerConfig[field] = t[field]
    					break
    				end
    			end
    		end
    	end
    end
    
    function Protection:isProtected()
    	return self.level ~= '*'
    end
    
    function Protection:makeProtectionCategory()
    	local cfg = self._cfg
    	local title = self.title
    	
    	-- Exit if the page is not protected.
    	if not self:isProtected() then
    		return ''
    	end
    	
    	-- Get the expiry key fragment.
    	local expiryFragment
    	if self.expiry == 'indef' then
    		expiryFragment = self.expiry
    	elseif type(self.expiry) == 'number' then
    		expiryFragment = 'temp'
    	end
    
    	-- Get the namespace key fragment.
    	local namespaceFragment
    	do
    		namespaceFragment = cfg.categoryNamespaceKeys[title.namespace]
    		if not namespaceFragment and title.namespace % 2 == 1 then
    				namespaceFragment = 'talk'
    		end
    	end
     
    	-- Define the order that key fragments are tested in. This is done with an
    	-- array of tables containing the value to be tested, along with its
    	-- position in the cfg.protectionCategories table.
    	local order = {
    		{val = expiryFragment,    keypos = 1},
    		{val = namespaceFragment, keypos = 2},
    		{val = self.reason,       keypos = 3},
    		{val = self.level,        keypos = 4},
    		{val = self.action,       keypos = 5}
    	}
    
    	-- To generate the correct category for some reason values, we need to
    	-- prioritise the position of the namespace key fragment over that of the
    	-- reason key fragment. For these reasn values, swap the namespace subtable
    	-- and the reason subtable around.
    	if self.reason and cfg.reasonsWithNamespacePriority[self.reason] then
    		table.insert(order, 3, table.remove(order, 2))
    	end
     
    	--[[
    	-- Define the attempt order. Inactive subtables (subtables with nil "value"
    	-- fields) are moved to the end, where they will later be given the key
    	-- "all". This is to cut down on the number of table lookups in
    	-- cfg.protectionCategories, which grows exponentially with the number of
    	-- non-nil keys. We keep track of the number of active subtables with the
    	-- noActive parameter.
    	--]]
    	local noActive, attemptOrder
    	do
    		local active, inactive = {}, {}
    		for i, t in ipairs(order) do
    			if t.val then
    				active[#active + 1] = t
    			else
    				inactive[#inactive + 1] = t
    			end
    		end
    		noActive = #active
    		attemptOrder = active
    		for i, t in ipairs(inactive) do
    			attemptOrder[#attemptOrder + 1] = t
    		end
    	end
     
    	--[[
    	-- Check increasingly generic key combinations until we find a match. If a
    	-- specific category exists for the combination of key fragments we are
    	-- given, that match will be found first. If not, we keep trying different
    	-- key fragment combinations until we match using the key
    	-- "all-all-all-all-all".
    	--
    	-- To generate the keys, we index the key subtables using a binary matrix
    	-- with indexes i and j. j is only calculated up to the number of active
    	-- subtables. For example, if there were three active subtables, the matrix
    	-- would look like this, with 0 corresponding to the key fragment "all", and
    	-- 1 corresponding to other key fragments.
    	-- 
    	--   j 1  2  3
    	-- i  
    	-- 1   1  1  1
    	-- 2   0  1  1
    	-- 3   1  0  1
    	-- 4   0  0  1
    	-- 5   1  1  0
    	-- 6   0  1  0
    	-- 7   1  0  0
    	-- 8   0  0  0
    	-- 
    	-- Values of j higher than the number of active subtables are set
    	-- to the string "all".
    	--
    	-- A key for cfg.protectionCategories is constructed for each value of i.
    	-- The position of the value in the key is determined by the keypos field in
    	-- each subtable.
    	--]]
    	local cats = cfg.protectionCategories
    	for i = 1, 2^noActive do
    		local key = {}
    		for j, t in ipairs(attemptOrder) do
    			if j > noActive then
    				key[t.keypos] = 'all'
    			else
    				local quotient = i / 2 ^ (j - 1)
    				quotient = math.ceil(quotient)
    				if quotient % 2 == 1 then
    					key[t.keypos] = t.val
    				else
    					key[t.keypos] = 'all'
    				end
    			end
    		end
    		key = table.concat(key, '-')
    		local attempt = cats[key]
    		if attempt then
    			return makeCategoryLink(attempt)
    		end
    	end
    end
    
    function Protection:needsExpiry()
    	local cfg = self._cfg
    	return not self.expiry
    		and cfg.expiryCheckActions[self.action]
    		and self.reason -- the old {{pp-protected}} didn't check for expiry
    		and not cfg.reasonsWithoutExpiryCheck[self.reason]
    end
    
    function Protection:isIncorrect()
    	local expiry = self.expiry
    	return not self:isProtected()
    		or type(expiry) == 'number' and expiry < os.time()
    end
    
    function Protection:isTemplateProtectedNonTemplate()
    	local action, namespace = self.action, self.title.namespace
    	return self.level == 'templateeditor'
    		and (
    			(action ~= 'edit' and action ~= 'move')
    			or (namespace ~= 10 and namespace ~= 828)
    		)
    end
    
    function Protection:makeCategoryLinks()
    	local msg = self._cfg.msg
    	local ret = { self:makeProtectionCategory() }
    	if self:needsExpiry() then
    		ret[#ret + 1] = makeCategoryLink(msg['tracking-category-expiry'])
    	end
    	if self:isIncorrect() then
    		ret[#ret + 1] = makeCategoryLink(msg['tracking-category-incorrect'])
    	end
    	if self:isTemplateProtectedNonTemplate() then
    		ret[#ret + 1] = makeCategoryLink(msg['tracking-category-template'])
    	end
    	return table.concat(ret)
    end
    
    --------------------------------------------------------------------------------
    -- Blurb class
    --------------------------------------------------------------------------------
    
    local Blurb = class('Blurb')
    
    function Blurb:initialize(protectionObj, args, cfg)
    	self._cfg = cfg
    	self._protectionObj = protectionObj
    	self._deletionDiscussionPage = args.xfd
    	self._username = args.user
    	self._section = args.section
    end
    
    -- Static methods --
    
    function Blurb.formatDate(num)
    	-- Formats a Unix timestamp into dd Month, YYYY format.
    	lang = lang or mw.language.getContentLanguage()
    	local success, date = pcall(
    		lang.formatDate,
    		lang,
    		'j F Y',
    		'@' .. tostring(num)
    	)
    	if success then
    		return date
    	end
    end
    
    -- Private methods --
    
    function Blurb:_getExpandedMessage(msgKey)
    	return self:_substituteParameters(self._cfg.msg[msgKey])
    end
    
    function Blurb:_substituteParameters(msg)
    	if not self._params then
    		local parameterFuncs = {}
    
    		parameterFuncs.CURRENTVERSION     = self._makeCurrentVersionParameter
    		parameterFuncs.DELETIONDISCUSSION = self._makeDeletionDiscussionParameter
    		parameterFuncs.DISPUTEBLURB       = self._makeDisputeBlurbParameter
    		parameterFuncs.DISPUTESECTION     = self._makeDisputeSectionParameter
    		parameterFuncs.EDITREQUEST        = self._makeEditRequestParameter
    		parameterFuncs.EXPIRY             = self._makeExpiryParameter
    		parameterFuncs.EXPLANATIONBLURB   = self._makeExplanationBlurbParameter
    		parameterFuncs.IMAGELINK          = self._makeImageLinkParameter
    		parameterFuncs.INTROBLURB         = self._makeIntroBlurbParameter
    		parameterFuncs.OFFICEBLURB        = self._makeOfficeBlurbParameter
    		parameterFuncs.PAGETYPE           = self._makePagetypeParameter
    		parameterFuncs.PROTECTIONBLURB    = self._makeProtectionBlurbParameter
    		parameterFuncs.PROTECTIONDATE     = self._makeProtectionDateParameter
    		parameterFuncs.PROTECTIONLEVEL    = self._makeProtectionLevelParameter
    		parameterFuncs.PROTECTIONLOG      = self._makeProtectionLogParameter
    		parameterFuncs.RESETBLURB         = self._makeResetBlurbParameter
    		parameterFuncs.TALKPAGE           = self._makeTalkPageParameter
    		parameterFuncs.TOOLTIPBLURB       = self._makeTooltipBlurbParameter
    		parameterFuncs.VANDAL             = self._makeVandalTemplateParameter
    		
    		self._params = setmetatable({}, {
    			__index = function (t, k)
    				local param
    				if parameterFuncs[k] then
    					param = parameterFuncs[k](self)
    				end
    				param = param or ''
    				t[k] = param
    				return param
    			end
    		})
    	end
    	
    	msg = msg:gsub('${(%u+)}', self._params)
    	return msg
    end
    
    function Blurb:_makeCurrentVersionParameter()
    	-- A link to the page history or the move log, depending on the kind of
    	-- protection.
    	local pagename = self._protectionObj.title.prefixedText
    	if self._protectionObj.action == 'move' then
    		-- We need the move log link.
    		return makeFullUrl(
    			'Special:Log',
    			{type = 'move', page = pagename},
    			self:_getExpandedMessage('current-version-move-display')
    		)
    	else
    		-- We need the history link.
    		return makeFullUrl(
    			pagename,
    			{action = 'history'},
    			self:_getExpandedMessage('current-version-edit-display')
    		)
    	end
    end
    
    function Blurb:_makeDeletionDiscussionLinkParameter()
    	if self._deletionDiscussionPage then
    		local display = self:_getExpandedMessage('deletion-discussion-link-display')
    		return string.format('[[%s|%s]]', self._deletionDiscussionPage, display)
    	end
    end
    
    function Blurb:_makeDisputeBlurbParameter()
    	if type(self._protectionObj.expiry) == 'number' then
    		return self:_getExpandedMessage('dispute-blurb-expiry')
    	else
    		return self:_getExpandedMessage('dispute-blurb-noexpiry')
    	end
    end
    
    function Blurb:_makeDisputeSectionParameter()
    	-- "disputes", with or without a section link
    	local disputes = self:_getExpandedMessage('dispute-section-link-display')
    	if self._section then
    		return string.format(
    			'[[%s:%s#%s|%s]]',
    			mw.site.namespaces[self._protectionObj.title.namespace].talk.name,
    			self._protectionObj.title.text,
    			self._section,
    			disputes
    		)
    	else
    		return disputes
    	end
    end
    
    function Blurb:_makeEditRequestParameter()
    	local mEditRequest = require('Module:Submit an edit request')
    	local action = self._protectionObj.action
    	local level = self._protectionObj.level
    	
    	-- Get the display message key.
    	local key
    	if action == 'edit' and level == 'autoconfirmed' then
    		key = 'edit-request-semi-display'
    	else
    		key = 'edit-request-full-display'
    	end
    	local display = self:_getExpandedMessage(key)
    	
    	-- Get the edit request type.
    	local requestType
    	if action == 'edit' then
    		if level == 'autoconfirmed' then
    			requestType = 'semi'
    		elseif level == 'templateeditor' then
    			requestType = 'template'
    		end
    	end
    	requestType = requestType or 'full'
    	
    	return mEditRequest.exportLinkToLua{type = requestType, display = display}
    end
    
    function Blurb:_makeExpiryParameter()
    	local expiry = self._protectionObj.expiry
    	if expiry == 'indef' then
    		return nil
    	elseif type(expiry) == 'number' then
    		return Blurb.formatDate(expiry)
    	elseif expiry then
    		-- Expiry is an error string.
    		return expiry
    	end
    end
    
    function Blurb:_makeExplanationBlurbParameter()
    	local action = self._protectionObj.action
    	local level = self._protectionObj.level
    	local namespace = self._protectionObj.title.namespace
    	local isTalk = self._protectionObj.title.isTalkPage
    
    	-- @TODO: add semi-protection and pending changes blurbs
    	local key
    	if namespace == 8 then
    		-- MediaWiki namespace
    		key = 'explanation-blurb-full-nounprotect'
    	elseif action == 'edit' and level == 'sysop' and not isTalk then
    		key = 'explanation-blurb-full-subject'
    	elseif action == 'move' then
    		if isTalk then
    			key = 'explanation-blurb-move-talk'
    		else
    			key = 'explanation-blurb-move-subject'
    		end
    	elseif action == 'create' then
    		if self._deletionDiscussion then
    			key = 'explanation-blurb-create-xfd'
    		else
    			key = 'explanation-blurb-create-noxfd'
    		end
    	else
    		key = 'explanation-blurb-default'
    	end
    	return self:_getExpandedMessage(key)
    end
    
    function Blurb:_makeImageLinkParameter()
    	local imageLinks = self._cfg.imageLinks
    	local action = self._protectionObj.action
    	local level = self._protectionObj.level
    	local msg
    	if imageLinks[action][level] then
    		msg = imageLinks[action][level]
    	elseif imageLinks[action].default then
    		msg = imageLinks[action].default
    	else
    		msg = imageLinks.edit.default
    	end
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:_makeIntroBlurbParameter()
    	if type(self._protectionObj.expiry) == 'number' then
    		return self:_getExpandedMessage('intro-blurb-expiry')
    	else
    		return self:_getExpandedMessage('intro-blurb-noexpiry')
    	end
    end
    
    function Blurb:_makeOfficeBlurbParameter()
    	if self._protectionObj.protectionDate then
    		return self:_getExpandedMessage('office-blurb-protectiondate')
    	else
    		return self:_getExpandedMessage('office-blurb-noprotectiondate')
    	end
    end
    
    function Blurb:_makePagetypeParameter()
    	local pagetypes = self._cfg.pagetypes
    	return pagetypes[self._protectionObj.title.namespace]
    		or pagetypes.default
    		or error('no default pagetype defined')
    end
    
    function Blurb:_makeProtectionBlurbParameter()
    	local protectionBlurbs = self._cfg.protectionBlurbs
    	local action = self._protectionObj.action
    	local level = self._protectionObj.level
    	local msg
    	if protectionBlurbs[action][level] then
    		msg = protectionBlurbs[action][level]
    	elseif protectionBlurbs[action].default then
    		msg = protectionBlurbs[action].default
    	elseif protectionBlurbs.edit.default then
    		msg = protectionBlurbs.edit.default
    	else
    		error('no protection blurb defined for protectionBlurbs.edit.default')
    	end
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:_makeProtectionDateParameter()
    	local protectionDate = self._protectionObj.protectionDate
    	if type(protectionDate) == 'number' then
    		return Blurb.formatDate(protectionDate)
    	else
    		return protectionDate
    	end
    end
    
    function Blurb:_makeProtectionLevelParameter()
    	local protectionLevels = self._cfg.protectionLevels
    	local action = self._protectionObj.action
    	local level = self._protectionObj.level
    	local msg
    	if protectionLevels[action][level] then
    		msg = protectionLevels[action][level]
    	elseif protectionLevels[action].default then
    		msg = protectionLevels[action].default
    	elseif protectionLevels.edit.default then
    		msg = protectionLevels.edit.default
    	else
    		error('no protection level defined for protectionLevels.edit.default')
    	end
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:_makeProtectionLogParameter()
    	local pagename = self._protectionObj.title.prefixedText
    	if self._protectionObj.action == 'autoreview' then
    		-- We need the pending changes log.
    		return makeFullUrl(
    			'Special:Log',
    			{type = 'stable', page = pagename},
    			self:_getExpandedMessage('pc-log-display')
    		)
    	else
    		-- We need the protection log.
    		return makeFullUrl(
    			'Special:Log',
    			{type = 'protect', page = pagename},
    			self:_getExpandedMessage('protection-log-display')
    		)
    	end
    end
    
    function Blurb:_makeResetBlurbParameter()
    	if self._protectionObj.protectionDate then
    		return self:_getExpandedMessage('reset-blurb-protectiondate')
    	else
    		return self:_getExpandedMessage('reset-blurb-noprotectiondate')
    	end
    end
    
    function Blurb:_makeTalkPageParameter()
    	return string.format(
    		'[[%s:%s#%s|%s]]',
    		mw.site.namespaces[self._protectionObj.title.namespace].talk.name,
    		self._protectionObj.title.text,
    		self._section or 'top',
    		self:_getExpandedMessage('talk-page-link-display')
    	)
    end
    
    function Blurb:_makeTooltipBlurbParameter()
    	if type(self._protectionObj.expiry) == 'number' then
    		return self:_getExpandedMessage('tooltip-blurb-expiry')
    	else
    		return self:_getExpandedMessage('tooltip-blurb-noexpiry')
    	end
    end
    
    function Blurb:_makeVandalTemplateParameter()
    	return require('Module:Vandal-m')._main{
    		self._username or self._protectionObj.title.baseText
    	}
    end
    
    -- Public methods --
    
    function Blurb:makeReasonText()
    	local msg = self._protectionObj.bannerConfig.text
    	if msg then
    		return self:_substituteParameters(msg)
    	end
    end
    
    function Blurb:makeExplanationText()
    	local msg = self._protectionObj.bannerConfig.explanation
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeTooltipText()
    	local msg = self._protectionObj.bannerConfig.tooltip
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeAltText()
    	local msg = self._protectionObj.bannerConfig.alt
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeLinkText()
    	local msg = self._protectionObj.bannerConfig.link
    	return self:_substituteParameters(msg)
    end
    
    --------------------------------------------------------------------------------
    -- BannerTemplate class
    --------------------------------------------------------------------------------
    
    local BannerTemplate = class('BannerTemplate')
    
    function BannerTemplate:initialize(protectionObj, cfg)
    	self._cfg = cfg
    
    	-- Set the image filename.
    	local imageFilename = protectionObj.bannerConfig.image
    	if imageFilename then
    		self._imageFilename = imageFilename
    	else
    		-- If an image filename isn't specified explicitly in the banner config,
    		-- generate it from the protection status and the namespace.
    		local action = protectionObj.action
    		local level = protectionObj.level
    		local expiry = protectionObj.expiry
    		local namespace = protectionObj.title.namespace
    		
    		-- Deal with special cases first.
    		if (namespace == 10 or namespace == 828)
    			and action == 'edit'
    			and level == 'sysop'
    			and not expiry
    		then
    			-- Fully protected modules and templates get the special red "indef"
    			-- padlock.
    			self._imageFilename = self._cfg.msg['image-filename-indef']
    		else
    			-- Deal with regular protection types.
    			local images = self._cfg.images
    			if images[action] then
    				if images[action][level] then
    					self._imageFilename = images[action][level]
    				elseif images[action].default then
    					self._imageFilename = images[action].default
    				end
    			end
    		end
    	end
    end
    
    function BannerTemplate:setImageWidth(width)
    	self._imageWidth = width
    end
    
    function BannerTemplate:setImageTooltip(tooltip)
    	self._imageCaption = tooltip
    end
    
    function BannerTemplate:renderImage()
    	local filename = self._imageFilename
    		or self._cfg.msg['image-filename-default']
    		or 'Transparent.gif'
    	return newFileLink(filename)
    		:width(self._imageWidth or 20)
    		:alt(self._imageAlt)
    		:link(self._imageLink)
    		:caption(self._imageCaption)
    		:render()
    end
    
    --------------------------------------------------------------------------------
    -- Banner class
    --------------------------------------------------------------------------------
    
    local Banner = BannerTemplate:subclass('Banner')
    
    function Banner:initialize(protectionObj, blurbObj, cfg)
    	BannerTemplate.initialize(self, protectionObj, cfg) -- This doesn't need the blurb.
    	self:setImageWidth(40)
    	self:setImageTooltip(blurbObj:makeAltText()) -- Large banners use the alt text for the tooltip.
    	self._reasonText = blurbObj:makeReasonText()
    	self._explanationText = blurbObj:makeExplanationText()
    	self._page = protectionObj.title.prefixedText -- Only makes a difference in testing.
    end
    
    function Banner:__tostring()
    	-- Renders the banner.
    	makeMessageBox = makeMessageBox or require('Module:Message box').main
    	local reasonText = self._reasonText or error('no reason text set')
    	local explanationText = self._explanationText
    	local mbargs = {
    		page = self._page,
    		type = 'protection',
    		image = self:renderImage(),
    		text = string.format(
    			"'''%s'''%s",
    			reasonText,
    			explanationText and '<br />' .. explanationText or ''
    		)
    	}
    	return makeMessageBox('mbox', mbargs)
    end
    
    --------------------------------------------------------------------------------
    -- Padlock class
    --------------------------------------------------------------------------------
    
    local Padlock = BannerTemplate:subclass('Padlock')
    
    function Padlock:initialize(protectionObj, blurbObj, cfg)
    	BannerTemplate.initialize(self, protectionObj, cfg) -- This doesn't need the blurb.
    	self:setImageWidth(20)
    	self:setImageTooltip(blurbObj:makeTooltipText())
    	self._imageAlt = blurbObj:makeAltText()
    	self._imageLink = blurbObj:makeLinkText()
    	self._right = cfg.padlockPositions[protectionObj.action]
    		or cfg.padlockPositions.default
    		or '55px'
    end
    
    function Padlock:__tostring()
    	local root = mw.html.create('div')
    	root
    		:addClass('metadata topicon nopopups')
    		:attr('id', 'protected-icon')
    		:css{display = 'none', right = self._right}
    		:wikitext(self:renderImage())
    	return tostring(root)
    end
    
    --------------------------------------------------------------------------------
    -- Exports
    --------------------------------------------------------------------------------
    
    local p = {}
    
    function p._exportClasses()
    	-- This is used for testing purposes.
    	return {
    		Protection = Protection,
    		Blurb = Blurb,
    		BannerTemplate = BannerTemplate,
    		Banner = Banner,
    		Padlock = Padlock,
    	}
    end
    
    function p._main(args, cfg, title)
    	if not cfg then
    		cfg = mw.loadData('Module:Protection banner/config')
    	end
    
    	-- Initialise protection and blurb objects
    	local protectionObj = Protection:new(args, cfg, title)
    	local blurbObj = Blurb:new(protectionObj, args, cfg)
    
    	local ret = {}
    
    	-- Render the banner
    	if protectionObj:isProtected() then
    		ret[#ret + 1] = tostring(
    			(yesno(args.small) and Padlock or Banner)
    			:new(protectionObj, blurbObj, cfg)
    		)
    	end
    	
    	-- Render the categories
    	if yesno(args.category) ~= false then
    		ret[#ret + 1] = protectionObj:makeCategoryLinks()
    	end
    	
    	return table.concat(ret)	
    end
    
    function p.main(frame)
    	if not getArgs then
    		getArgs = require('Module:Arguments').getArgs
    	end
    	local args = getArgs(frame, {wrappers = 'Template:Pp'})
    	return p._main(args)
    end
    
    return p