Module:Protection banner: Difference between revisions

    From Nonbinary Wiki
    (use a __tostring metamethod to render the banner objects)
    (some cleanup)
    Line 11: Line 11:
    -- Lazily initialise modules and objects we don't always need.
    -- Lazily initialise modules and objects we don't always need.
    local mArguments, mMessageBox, lang
    local mArguments, mMessageBox, 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


    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    Line 17: Line 50:


    local Protection = class('Protection')
    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, configObj, titleObj)
    function Protection:initialize(args, configObj, titleObj)
    Line 24: Line 73:
    -- Set action
    -- Set action
    do
    do
    local actions = {
    if not args.action then
    create = true,
    self.action = 'edit'
    edit = true,
    elseif self.supportedActions[args.action] then
    move = true,
    autoreview = true
    }
    if args.action and actions[args.action] then
    self.action = args.action
    self.action = args.action
    else
    else
    self.action = 'edit'
    error('Unsupported action ' .. args.action, 2)
    end
    end
    end
    end
    Line 39: Line 84:
    -- Set level
    -- Set level
    do
    do
    local level = effectiveProtectionLevel(self.action, titleObj)
    self.level = effectiveProtectionLevel(self.action, titleObj)
    if level == 'accountcreator' then
    if self.level == 'accountcreator' then
    -- Lump titleblacklisted pages in with template-protected pages,
    -- Lump titleblacklisted pages in with template-protected pages,
    -- since templateeditors can do both.
    -- since templateeditors can do both.
    level = 'templateeditor'
    self.level = 'templateeditor'
    end
    elseif not self.level or (self.action == 'move' and self.level == 'autoconfirmed') then
    if self.action == 'move' and level == 'autoconfirmed' then
    -- Users need to be autoconfirmed to move pages anyway, so treat
    -- Users need to be autoconfirmed to move pages anyway, so treat
    -- semi-move-protected pages as unprotected.
    -- semi-move-protected pages as unprotected.
    level = '*'
    self.level = '*'
    end
    self.level = level or '*'
    end
     
    -- Validation function for the expiry and the protection date
    local function validateDate(date, dateType)
    lang = lang or mw.language.getContentLanguage()
    local success, expiry = pcall(lang.formatDate, lang, 'U', args.expiry)
    expiry = tonumber(expiry)
    if success and expiry then
    return expiry
    else
    return string.format(
    '<strong class="error">Error: invalid %s ("%s")</strong>',
    dateType,
    tostring(args.expiry)
    )
    end
    end
    end
    end
    Line 71: Line 98:
    -- Set expiry
    -- Set expiry
    if args.expiry then
    if args.expiry then
    local indefStrings = configObj.cfg.indefStrings
    if configObj.cfg.indefStrings[args.expiry] then
    if indefStrings[args.expiry] then
    self.expiry = 'indef'
    self.expiry = 'indef'
    elseif type(args.expiry) == 'number' then
    elseif type(args.expiry) == 'number' then
    Line 96: Line 122:
    self.bannerConfig = {}
    self.bannerConfig = {}
    local cfg = configObj.cfg
    local cfg = configObj.cfg
    local fields = {
    'text',
    'explanation',
    'tooltip',
    'alt',
    'link',
    'image'
    }
    local configTables = {}
    local configTables = {}
    if cfg.banners[self.action] then
    if cfg.banners[self.action] then
    Line 113: Line 131:
    end
    end
    configTables[#configTables + 1] = cfg.masterBanner
    configTables[#configTables + 1] = cfg.masterBanner
    for i, field in ipairs(fields) do
    for i, field in ipairs(self.bannerConfigFields) do
    for j, t in ipairs(configTables) do
    for j, t in ipairs(configTables) do
    if t[field] then
    if t[field] then
    Line 126: Line 144:
    function Protection:isProtected()
    function Protection:isProtected()
    return self.level ~= '*'
    return self.level ~= '*'
    end
    function Protection._makeCategoryLink(cat)
    -- Static method for rendering category wikitext.
    if cat then
    return string.format(
    '[[%s:%s]]',
    mw.site.namespaces[14].name,
    cat
    )
    else
    return ''
    end
    end
    end


    Line 291: Line 296:
    end
    end


    return self._makeCategoryLink(cat)
    return makeCategoryLink(cat)
    end
    end


    Line 306: Line 311:
    cat = self._configObj.msg['tracking-category-expiry']
    cat = self._configObj.msg['tracking-category-expiry']
    end
    end
    return self._makeCategoryLink(cat)
    return makeCategoryLink(cat)
    end
    end


    Line 317: Line 322:
    cat = configObj.msg['tracking-category-incorrect']
    cat = configObj.msg['tracking-category-incorrect']
    end
    end
    return self._makeCategoryLink(cat)
    return makeCategoryLink(cat)
    end
    end


    Line 333: Line 338:
    cat = configObj.msg['tracking-category-template']
    cat = configObj.msg['tracking-category-template']
    end
    end
    return self._makeCategoryLink(cat)
    return makeCategoryLink(cat)
    end
    end



    Revision as of 17:18, 28 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 mArguments, mMessageBox, 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
    
    --------------------------------------------------------------------------------
    -- 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, configObj, titleObj)
    	self._configObj = configObj
    	self._titleObj = titleObj
    
    	-- Set action
    	do
    		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
    	end
    
    	-- Set level
    	do
    		self.level = effectiveProtectionLevel(self.action, titleObj)
    		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
    	end
    
    	-- Set expiry
    	if args.expiry then
    		if configObj.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 cfg = configObj.cfg
    		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 configObj = self._configObj
    	local titleObj = self._titleObj
    	
    	-- Exit if the page is not protected.
    	if not self:isProtected() then
    		return ''
    	end
    	
    	-- Get the expiry.
    	local expiry = self.expiry
    	if type(expiry) == 'number' then
    		expiry = 'temp'
    	elseif expiry ~= 'indef' then
    		expiry = nil
    	end
    
    	-- Get the namespace category key.
    	local nskey
    	do
    		local namespace = titleObj.namespace
    		local categoryNamespaces = configObj.cfg.categoryNamespaceKeys
    		nskey = categoryNamespaces[namespace]
    		if not nskey and namespace % 2 == 1 then
    				nskey = 'talk'
    		end
    	end
    
    	-- Get the other inputs.
    	local reason = self.reason
    	local action = self.action
    	local level = self.level
     
    	--[[
    	-- Define the properties table. Each property is a table containing the
    	-- canonical order that the property is tested in, the position the
    	-- property has in the category key strings, and the property value itself.
    	--]]
    	local properties = {
    		expiry    = {order = 1, val = expiry},
    		namespace = {order = 2, val = nskey},
    		reason    = {order = 3, val = reason},
    		level     = {order = 4, val = level},
    		action    = {order = 5, val = action}
    	}
     
    	--[[
    	-- Apply the category order configuration, if any. The configuration value
    	-- will be a property string, e.g. 'reason', 'namespace', etc. The property
    	-- corresponding to that string is tested last (i.e. it is the most
    	-- important, because it keeps its specified value the longest) and the
    	-- other properties are tested in the canonical order. If no configuration
    	-- value is specified then the canonical order is used.
    	--]]
    	local configOrder = {}
    	do
    		local reasonsWithNamespacePriority = configObj.cfg.reasonsWithNamespacePriority
    		local namespaceFirst = reason and reasonsWithNamespacePriority[reason] or false
    		for propertiesKey, t in pairs(properties) do
    			configOrder[t.order] = t
    		end
    		if namespaceFirst then
    			-- Swap namespace and reason around.
    			local namespaceTable = table.remove(configOrder, 2)
    			table.insert(configOrder, 3, namespaceTable)
    		end
    	end
     
    	--[[
    	-- Define the attempt order. Properties with no value defined are moved
    	-- to the end, where they will later be given the value "all". This is
    	-- to cut down on the number of table lookups in the cats table, which
    	-- grows exponentially with the number of properties with valid values.
    	-- We keep track of the number of active properties with the noActive
    	-- parameter.
    	--]]
    	local noActive, attemptOrder
    	do
    		local active, inactive = {}, {}
    		for i, t in ipairs(configOrder) 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 properties
    	-- we are given, that match will be found first. If not, we keep
    	-- trying different key combinations until we match using the key
    	-- "all-all-all-all-all".
    	--
    	-- To generate the keys, we index the property subtables using a
    	-- binary matrix with indexes i and j. j is only calculated up to
    	-- the number of active properties. For example, if there were three
    	-- active properties, the matrix would look like this, with 0
    	-- corresponding to the string "all", and 1 corresponding to the
    	-- val field in the property table:
    	-- 
    	--   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 properties are set
    	-- to the string "all".
    	--
    	-- A key for the category table is constructed for each value of i.
    	-- The correct position of the value in the key is determined by the
    	-- pos field in the property table.
    	--]]
    	local cats = configObj.cfg.protectionCategories
    	local cat
    	for i = 1, 2^noActive do
    		local key = {}
    		for j, t in ipairs(attemptOrder) do
    			if j > noActive then
    				key[t.order] = 'all'
    			else
    				local quotient = i / 2 ^ (j - 1)
    				quotient = math.ceil(quotient)
    				if quotient % 2 == 1 then
    					key[t.order] = t.val
    				else
    					key[t.order] = 'all'
    				end
    			end
    		end
    		key = table.concat(key, '-')
    		local attempt = cats[key]
    		if attempt then
    			cat = attempt
    			break
    		end
    	end
    
    	return makeCategoryLink(cat)
    end
    
    function Protection:makeExpiryCategory()
    	local reasonsWithoutExpiryCheck = self._configObj.cfg.reasonsWithoutExpiryCheck
    	local expiryCheckActions = self._configObj.cfg.expiryCheckActions
    	
    	local cat
    	if not self.expiry
    		and expiryCheckActions[self.action]
    		and self.reason -- the old {{pp-protected}} didn't check for expiry
    		and not reasonsWithoutExpiryCheck[self.reason]
    	then
    		cat = self._configObj.msg['tracking-category-expiry']
    	end
    	return makeCategoryLink(cat)
    end
    
    function Protection:makeErrorCategory()
    	local configObj = self._configObj
    	local cat
    	if not self:isProtected()
    		or type(self.expiry) == 'number' and self.expiry < os.time()
    	then
    		cat = configObj.msg['tracking-category-incorrect']
    	end
    	return makeCategoryLink(cat)
    end
    
    function Protection:makeTemplateCategory()
    	local configObj = self._configObj
    	local titleObj = self._titleObj
    	
    	local cat
    	if self.level == 'templateeditor'
    		and (
    			(self.action ~= 'edit' and self.action ~= 'move')
    			or (titleObj.namespace ~= 10 and titleObj.namespace ~= 828)
    		)
    	then
    		cat = configObj.msg['tracking-category-template']
    	end
    	return makeCategoryLink(cat)
    end
    
    --------------------------------------------------------------------------------
    -- Blurb class
    --------------------------------------------------------------------------------
    
    local Blurb = class('Blurb')
    
    function Blurb:initialize(configObj, protectionObj, titleObj)
    	self._configObj = configObj
    	self._protectionObj = protectionObj
    	self._bannerConfig = protectionObj.bannerConfig
    	self._titleObj = titleObj
    end
    
    -- Static methods --
    
    function Blurb.makeFullUrl(page, query, display)
    	local url = mw.uri.fullUrl(page, query)
    	url = tostring(url)
    	return string.format('[%s %s]', url, display)
    end
    
    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(msg)
    	local msg = self._configObj.msg[msg]
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:_substituteParameters(msg)
    	if not self._params then
    		local params, 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.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 = params
    	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 action = self._protectionObj.action
    	local pagename = self._titleObj.prefixedText
    	if action == 'move' then
    		-- We need the move log link.
    		return self.makeFullUrl(
    			'Special:Log',
    			{type = 'move', page = pagename},
    			self:_getExpandedMessage('current-version-move-display')
    		)
    	else
    		-- We need the history link.
    		return self.makeFullUrl(
    			pagename,
    			{action = 'history'},
    			self:_getExpandedMessage('current-version-edit-display')
    		)
    	end
    end
    
    function Blurb:_makeDeletionDiscussionLinkParameter()
    	local deletionDiscussionPage = self._deletionDiscussionPage
    	if deletionDiscussionPage then
    		local display = self:_getExpandedMessage('deletion-discussion-link-display')
    		return string.format('[[%s|%s]]', deletionDiscussionPage, display)
    	end
    end
    
    function Blurb:_makeDisputeBlurbParameter()
    	local expiry = self._protectionObj.expiry
    	if type(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 section = self._section
    	local disputes = self:_getExpandedMessage('dispute-section-link-display')
    	if section then
    		return string.format(
    			'[[%s:%s#%s|%s]]',
    			mw.site.namespaces[self._titleObj.namespace].talk.name,
    			self._titleObj.text,
    			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._titleObj.namespace
    	local isTalk = self._titleObj.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
    		local xfd = self._deletionDiscussion
    		if xfd 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._configObj.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()
    	local expiry = self._protectionObj.expiry
    	if type(expiry) == 'number' then
    		return self:_getExpandedMessage('intro-blurb-expiry')
    	else
    		return self:_getExpandedMessage('intro-blurb-noexpiry')
    	end
    end
    
    function Blurb:_makeOfficeBlurbParameter()
    	local protectionDate = self._protectionObj.protectionDate
    	if protectionDate then
    		return self:_getExpandedMessage('office-blurb-protectiondate')
    	else
    		return self:_getExpandedMessage('office-blurb-noprotectiondate')
    	end
    end
    
    function Blurb:_makePagetypeParameter()
    	local pagetypes = self._configObj.cfg.pagetypes
    	local namespace = self._titleObj.namespace
    	return pagetypes[namespace] or pagetypes.default or error('no default pagetype defined')
    end
    
    function Blurb:_makeProtectionBlurbParameter()
    	local protectionBlurbs = self._configObj.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 cfg.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._configObj.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 cfg.protectionLevels.edit.default')
    	end
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:_makeProtectionLogParameter()
    	local action = self._protectionObj.action
    	local pagename = self._titleObj.prefixedText
    	if action == 'autoreview' then
    		-- We need the pending changes log.
    		return self.makeFullUrl(
    			'Special:Log',
    			{type = 'stable', page = pagename},
    			self:_getExpandedMessage('pc-log-display')
    		)
    	else
    		-- We need the protection log.
    		return self.makeFullUrl(
    			'Special:Log',
    			{type = 'protect', page = pagename},
    			self:_getExpandedMessage('protection-log-display')
    		)
    	end
    end
    
    function Blurb:_makeResetBlurbParameter()
    	local protectionDate = self._protectionObj.protectionDate
    	if protectionDate then
    		return self:_getExpandedMessage('reset-blurb-protectiondate')
    	else
    		return self:_getExpandedMessage('reset-blurb-noprotectiondate')
    	end
    end
    
    function Blurb:_makeTalkPageParameter()
    	local section = self._section
    	local display = self:_getExpandedMessage('talk-page-link-display')
    	return string.format(
    		'[[%s:%s#%s|%s]]',
    		mw.site.namespaces[self._titleObj.namespace].talk.name,
    		self._titleObj.text,
    		section or 'top',
    		display
    	)
    end
    
    function Blurb:_makeTooltipBlurbParameter()
    	local expiry = self._protectionObj.expiry
    	if type(expiry) == 'number' then
    		return self:_getExpandedMessage('tooltip-blurb-expiry')
    	else
    		return self:_getExpandedMessage('tooltip-blurb-noexpiry')
    	end
    end
    
    function Blurb:_makeVandalTemplateParameter()
    	local mVandalM = require('Module:Vandal-m')
    	local username = self._username
    	username = username or self._titleObj.baseText
    	return mVandalM._main{username}
    end
    
    -- Public methods --
    
    function Blurb:setDeletionDiscussionPage(page)
    	self._deletionDiscussionPage = page
    end
    
    function Blurb:setUsername(username)
    	self._username = username
    end
    
    function Blurb:setSection(section)
    	self._section = section
    end
    
    function Blurb:makeReasonText()
    	local msg = self._bannerConfig.text
    	if msg then
    		return self:_substituteParameters(msg)
    	end
    end
    
    function Blurb:makeExplanationText()
    	local msg = self._bannerConfig.explanation
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeTooltipText()
    	local msg = self._bannerConfig.tooltip
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeAltText()
    	local msg = self._bannerConfig.alt
    	return self:_substituteParameters(msg)
    end
    
    function Blurb:makeLinkText()
    	local msg = self._bannerConfig.link
    	return self:_substituteParameters(msg)
    end
    
    --------------------------------------------------------------------------------
    -- BannerTemplate class
    --------------------------------------------------------------------------------
    
    local BannerTemplate = class('BannerTemplate')
    
    function BannerTemplate:initialize(configObj)
    	self._configObj = configObj
    end
    
    function BannerTemplate:setImageFilename(filename, protectionObj, titleObj)
    	if filename then
    		self._imageFilename = filename
    		return nil
    	end
    
    	local action = protectionObj.action
    	local level = protectionObj.level
    	local expiry = protectionObj.expiry
    	local namespace = titleObj.namespace
    	
    	-- Deal with special cases first.
    	if (namespace == 10 or namespace == 828) -- Maybe we don't need the namespace check?
    		and action == 'edit'
    		and level == 'sysop'
    		and not expiry
    	then
    		-- Fully protected modules and templates get the special red "indef"
    		-- padlock.
    		self._imageFilename = self._configObj.msg['image-filename-indef']
    		return nil
    	end
    
    	-- Deal with regular protection types.
    	local images = self._configObj.cfg.images
    	if images[action] then
    		if images[action][level] then
    			self._imageFilename = images[action][level]
    			return nil
    		elseif images[action].default then
    			self._imageFilename = images[action].default
    			return nil
    		end
    	end
    
    	return nil
    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._configObj.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(configObj)
    	BannerTemplate.initialize(self, configObj)
    	self:setImageWidth(40)
    end
    
    function Banner:setReasonText(s)
    	self._reasonText = s
    end
    
    function Banner:setExplanationText(s)
    	self._explanationText = s
    end
    
    function Banner:setPage(s)
    	-- This specifies the page to generate the banner for. This only affects
    	-- Module:Message box if the page specified is not the current page.
    	self._page = s
    end
    
    function Banner:__tostring()
    	-- Renders the banner.
    	mMessageBox = mMessageBox or require('Module:Message box')
    	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 mMessageBox.main('mbox', mbargs)
    end
    
    --------------------------------------------------------------------------------
    -- Padlock class
    --------------------------------------------------------------------------------
    
    local Padlock = BannerTemplate:subclass('Padlock')
    
    function Padlock:initialize(configObj)
    	BannerTemplate.initialize(self, configObj)
    	self:setImageWidth(20)
    end
    
    function Padlock:setImageAlt(alt)
    	self._imageAlt = alt
    end
    
    function Padlock:setImageLink(link)
    	self._imageLink = link
    end
    
    function Padlock:setRight(px)
    	self._right = px
    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 or '55px'}
    		:wikitext(self:renderImage())
    	return tostring(root)
    end
    
    --------------------------------------------------------------------------------
    -- ProtectionBanner class
    --------------------------------------------------------------------------------
    
    local ProtectionBanner = {}
    
    function ProtectionBanner.exportToWiki(frame, configObj, titleObj)
    	mArguments = mArguments or require('Module:Arguments')
    	local args = mArguments.getArgs(frame)
    	return ProtectionBanner.exportToLua(args, configObj, titleObj)
    end
    
    function ProtectionBanner.exportToLua(args, configObj, titleObj)
    	configObj = configObj or mw.loadData('Module:Protection banner/config')
    	titleObj = titleObj or mw.title.getCurrentTitle()
    
    	-- Initialise protection and blurb objects
    	local protectionObj = Protection:new(args, configObj, titleObj)
    	local blurbObj = Blurb:new(configObj, protectionObj, titleObj)
    	blurbObj:setDeletionDiscussionPage(args.xfd)
    	blurbObj:setUsername(args.user)
    	blurbObj:setSection(args.section)
    
    	local ret = {}
    
    	-- Render the banner
    	if protectionObj:isProtected() then
    		-- Get the banner object
    		local isPadlock = yesno(args.small)
    		local bannerObj
    		if isPadlock then
    			bannerObj = Padlock:new(configObj)
    		else
    			bannerObj = Banner:new(configObj)
    		end
    
    		-- Set the image fields
    		local bannerConfig = protectionObj.bannerConfig
    		bannerObj:setImageFilename(bannerConfig.image, protectionObj, titleObj)
    		if isPadlock then
    			bannerObj:setImageTooltip(blurbObj:makeTooltipText())
    			bannerObj:setImageAlt(blurbObj:makeAltText())
    			bannerObj:setImageLink(blurbObj:makeLinkText())
    		else
    			-- Large banners use the alt text for the tooltip.
    			bannerObj:setImageTooltip(blurbObj:makeAltText())
    		end
    
    		-- Set the text fields and the page name.
    		if not isPadlock then
    			bannerObj:setReasonText(blurbObj:makeReasonText())
    			bannerObj:setExplanationText(blurbObj:makeExplanationText())
    			bannerObj:setPage(titleObj.prefixedText)
    		end
    
    		ret[#ret + 1] = tostring(bannerObj)
    	end
    	
    	-- Render the categories
    	if yesno(args.category) ~= false then
    		ret[#ret + 1] = protectionObj:makeProtectionCategory()
    		ret[#ret + 1] = protectionObj:makeExpiryCategory()
    		ret[#ret + 1] = protectionObj:makeErrorCategory()
    		ret[#ret + 1] = protectionObj:makeTemplateCategory()
    	end
    	
    	return table.concat(ret)	
    end
    
    function ProtectionBanner._exportClasses()
    	-- This is used to export the classes for testing purposes.
    	return {
    		Protection = Protection,
    		Blurb = Blurb,
    		BannerTemplate = BannerTemplate,
    		Banner = Banner,
    		Padlock = Padlock,
    	}
    end
    
    return ProtectionBanner