Difference between revisions of "Module:Protection banner"

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(allow specifying a data table to config objects for testing purposes)
(Add render methods to the Padlock and Banner classes, and call them from the exportToLua function. Now we have something to look at, yay!)
Line 141: Line 141:
 
end
 
end
  
-- Set other params
+
-- Set reason
self._reason = args.reason
+
if args.reason then
 +
self._reason = args.reason:lower()
 +
end
 +
 
 +
-- Set protection date
 
self._protectionDate = validateDate(args.date, 'protection date')
 
self._protectionDate = validateDate(args.date, 'protection date')
 
end
 
end
Line 393: Line 397:
 
-- parameter $10
 
-- parameter $10
 
local action = self._protectionStatusObj:getAction()
 
local action = self._protectionStatusObj:getAction()
 +
local pagename = self._titleObj.prefixedText
 
if action == 'autoreview' then
 
if action == 'autoreview' then
 
-- We need the pending changes log.
 
-- We need the pending changes log.
Line 464: Line 469:
 
-- Don't display these links if we are on a talk page.
 
-- Don't display these links if we are on a talk page.
 
if not self._titleObj.isTalkPage then
 
if not self._titleObj.isTalkPage then
local msg = self._config:getMessage('semi-subject-page-links')
+
local msg = self._configObj:getMessage('semi-subject-page-links')
return self._substituteParameters(msg)
+
return self:_substituteParameters(msg)
 
end
 
end
 
end
 
end
Line 535: Line 540:
 
function Blurb:makeAltText()
 
function Blurb:makeAltText()
 
local msg = self._bannerConfig.alt
 
local msg = self._bannerConfig.alt
 +
return self:_substituteParameters(msg)
 +
end
 +
 +
function Blurb:makeLinkText()
 +
local msg = self._bannerConfig.link
 
return self:_substituteParameters(msg)
 
return self:_substituteParameters(msg)
 
end
 
end
Line 560: Line 570:
 
return nil
 
return nil
 
end
 
end
+
 
 
-- Deal with special cases first.
 
-- Deal with special cases first.
 
if (namespace == 10 or namespace == 828) -- Maybe we don't need the namespace check?
 
if (namespace == 10 or namespace == 828) -- Maybe we don't need the namespace check?
Line 592: Line 602:
 
end
 
end
  
function BannerTemplate:setImageAlt(alt)
+
function BannerTemplate:setImageTooltip(tooltip)
self._imageAlt = alt
+
self._imageCaption = tooltip
end
 
 
 
function BannerTemplate:setImageLink(link)
 
self._imageLink = link
 
end
 
 
 
function BannerTemplate:setImageCaption(caption)
 
self._imageCaption = caption
 
 
end
 
end
  
 
function BannerTemplate:renderImage()
 
function BannerTemplate:renderImage()
local filename = self._filename
+
local filename = self._imageFilename
 
or self._configObj:getMessage('image-filename-default')
 
or self._configObj:getMessage('image-filename-default')
 
or 'Transparent.gif'
 
or 'Transparent.gif'
Line 627: Line 629:
 
local Banner = BannerTemplate:subclass('Banner')
 
local Banner = BannerTemplate:subclass('Banner')
  
function Banner:initialize()
+
function Banner:initialize(configObj)
 +
BannerTemplate.initialize(self, configObj)
 
self:setImageWidth(40)
 
self:setImageWidth(40)
 +
end
 +
 +
function Banner:setReasonText(s)
 +
self._reasonText = s
 +
end
 +
 +
function Banner:setExplanationText(s)
 +
self._explanationText = s
 +
end
 +
 +
function Banner:render(page)
 +
-- Renders the banner.
 +
-- The page parameter specifies the page to generate the banner for, for
 +
-- testing purposes.
 +
mMessageBox = mMessageBox or require('Module:Message box')
 +
local reasonText = self._reasonText or error('no reason text set')
 +
local explanationText = self._explanationText
 +
local mbargs = {
 +
page = page,
 +
type = 'protection',
 +
image = self:renderImage(),
 +
text = string.format(
 +
"'''%s'''%s",
 +
reasonText,
 +
explanationText and '<br />' .. explanationText or ''
 +
)
 +
}
 +
return mMessageBox.main('mbox', mbargs)
 
end
 
end
  
Line 637: Line 668:
 
local Padlock = BannerTemplate:subclass('Padlock')
 
local Padlock = BannerTemplate:subclass('Padlock')
  
function Padlock:initialize()
+
function Padlock:initialize(configObj)
 +
BannerTemplate.initialize(self, configObj)
 
self:setImageWidth(20)
 
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:render()
 +
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
 
end
  
Line 855: Line 909:
 
local ProtectionBanner = {}
 
local ProtectionBanner = {}
  
function ProtectionBanner.exportToWiki(frame, title)
+
function ProtectionBanner.exportToWiki(frame, titleObj)
 
mArguments = mArguments or require('Module:Arguments')
 
mArguments = mArguments or require('Module:Arguments')
 
local args = mArguments.getArgs(frame)
 
local args = mArguments.getArgs(frame)
return ProtectionBanner.exportToLua(args, title)
+
return ProtectionBanner.exportToLua(args, titleObj)
 
end
 
end
  
function ProtectionBanner.exportToLua(args, title)
+
function ProtectionBanner.exportToLua(args, titleObj)
title = title or mw.title.getCurrentTitle()
+
titleObj = titleObj or mw.title.getCurrentTitle()
  
 
-- Get data objects
 
-- Get data objects
local theConfig = Config:new()
+
local configObj = Config:new()
local theProtectionStatus = ProtectionStatus:new(args, theConfig, title)
+
local protectionObj = ProtectionStatus:new(args, configObj, titleObj)
 +
 
 +
-- Initialise the blurb object
 +
local blurbObj = Blurb:new(configObj, protectionObj, titleObj)
 +
blurbObj:setDeletionDiscussionPage(args.xfd)
 +
blurbObj:setUsername(args.user)
 +
blurbObj:setSection(args.section)
  
 
local ret = {}
 
local ret = {}
  
 
-- Render the banner
 
-- Render the banner
local theBanner
+
do
if yesno(args.small) then
+
-- Get the banner object
theBanner = Padlock.new(theConfig, theProtectionStatus, title)
+
local isPadlock = yesno(args.small)
else
+
local bannerObj
theBanner = Banner.new(theConfig, theProtectionStatus, title)
+
if isPadlock then
 +
bannerObj = Padlock:new(configObj)
 +
else
 +
bannerObj = Banner:new(configObj)
 +
end
 +
 
 +
-- Set the image fields
 +
local bannerConfig = configObj:getBannerConfig(protectionObj)
 +
local imageFilename = bannerConfig.image
 +
bannerObj:setImageFilename(
 +
imageFilename,
 +
protectionObj:getAction(),
 +
protectionObj:getLevel(),
 +
titleObj.namespace,
 +
protectionObj:getExpiry()
 +
)
 +
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
 +
if not isPadlock then
 +
bannerObj:setReasonText(blurbObj:makeReasonText())
 +
bannerObj:setExplanationText(blurbObj:makeExplanationText())
 +
end
 +
 
 +
ret[#ret + 1] = bannerObj:render()
 
end
 
end
theBanner = Padlock.new(theConfig, theProtectionStatus, title)
 
theBanner:setDeletionDiscussionPage(args.xfd)
 
theBanner:setUsername(args.user)
 
theBanner:setSection(args.section)
 
ret[#ret + 1] = theBanner:render()
 
 
 
 
-- Render the categories
 
-- Render the categories
 
+
 
return table.concat(ret)
 
return table.concat(ret)
 
end
 
end

Revision as of 06:06, 23 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 mFileLink = require('Module:File link')
local mProtectionLevel = require('Module:Effective protection level')
local yesno = require('Module:Yesno')

-- Lazily initialise modules and objects we don't always need.
local mArguments, mMessageBox, lang

--------------------------------------------------------------------------------
-- Config class
--------------------------------------------------------------------------------

local Config = class('Config')

function Config:initialize(data)
	data = data or mw.loadData('Module:Protection banner/config')
	self._cfg = data.cfg
	self._msg = data.msg
	self._bannerConfigTables = {}
end

function Config:getBannerConfig(protectionStatusObj)
	if self._bannerConfigTables[protectionStatusObj] then
		return self._bannerConfigTables[protectionStatusObj]
	else
		local ret = {}
		local cfg = self._cfg
		local action = protectionStatusObj:getAction()
		local level = protectionStatusObj:getLevel()
		local reason = protectionStatusObj:getReason()
		local fields = {
			'text',
			'explanation',
			'tooltip',
			'alt',
			'image',
			'categoryOrder',
			'categoryReason'
		}
		local configTables = {}
		if cfg.banners[action] then
			configTables[#configTables + 1] = cfg.banners[action][reason]
		end
		if cfg.defaultBanners[action] then
			configTables[#configTables + 1] = cfg.defaultBanners[action][level]
			configTables[#configTables + 1] = cfg.defaultBanners[action].default
		end
		for i, field in ipairs(fields) do
			for j, t in ipairs(configTables) do
				if t[field] then
					ret[field] = t[field]
					break
				end
			end
		end
		self._bannerConfigTables[protectionStatusObj] = ret
		return ret
	end
end

function Config:getConfigTable(key)
	local blacklist = {
		banners = true,
		defaultBanners = true
	}
	if not blacklist[key] then
		return self._cfg[key]
	else
		return nil
	end
end

function Config:getMessage(key)
	return self._msg[key]
end

--------------------------------------------------------------------------------
-- ProtectionStatus class
--------------------------------------------------------------------------------

local ProtectionStatus = class('ProtectionStatus')

function ProtectionStatus:initialize(args, configObj, titleObj)
	-- Set action
	do
		local actions = {
			create = true,
			edit = true,
			move = true,
			autoreview = true
		}
		if args.action and actions[args.action] then
			self._action = args.action
		else
			self._action = 'edit'
		end
	end

	-- Set level
	do
		local level = mProtectionLevel._main(self._action, titleObj)
		if level == 'accountcreator' then
			-- Lump titleblacklisted pages in with template-protected pages,
			-- since templateeditors can do both.
			level = 'templateeditor'
		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

	-- Set expiry
	if args.expiry then
		local indefStrings = configObj:getConfigTable('indefStrings')
		if 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
	if args.reason then
		self._reason = args.reason:lower()
	end

	-- Set protection date
	self._protectionDate = validateDate(args.date, 'protection date')
end

function ProtectionStatus:getAction()
	return self._action
end

function ProtectionStatus:getLevel()
	return self._level
end

function ProtectionStatus:getReason()
	return self._reason
end

function ProtectionStatus:getExpiry()
	return self._expiry
end

function ProtectionStatus:getProtectionDate()
	return self._protectionDate
end

--------------------------------------------------------------------------------
-- Blurb class
--------------------------------------------------------------------------------

local Blurb = class('Blurb')

function Blurb:initialize(configObj, protectionStatusObj, titleObj)
	self._configObj = configObj
	self._protectionStatusObj = protectionStatusObj
	self._bannerConfig = configObj:getBannerConfig(protectionStatusObj)
	self._titleObj = titleObj
end

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 M, 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

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:_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[1] = self._makeIntroParameter
		parameterFuncs[2] = self._makeUntilParameter
		parameterFuncs[3] = self._makeDisputesParameter
		parameterFuncs[4] = self._makePagetypeParameter
		parameterFuncs[5] = self._makeProtectionDateParameter
		parameterFuncs[6] = self._makeVandalTemplateParameter
		parameterFuncs[7] = self._makeProtectionLevelParameter
		parameterFuncs[8] = self._makeExpiryParameter
		parameterFuncs[9] = self._makeDisputeLinkParameter -- A link to the page history or the move log
		parameterFuncs[10] = self._makeProtectionLogParameter
		parameterFuncs[11] = self._makeTalkLinkParameter
		parameterFuncs[12] = self._makeEditRequestParameter
		parameterFuncs[13] = self._makeRequestUnprotectionParameter
		parameterFuncs[14] = self._makeSubjectPageLinksParameter -- Adds links to edit requests and the talk page if we are on a subject page
		parameterFuncs[15] = self._makeDeletionBlurbParameter
		parameterFuncs[16] = self._makeDeletionDiscussionLinkParameter
		parameterFuncs[17] = self._makeDeletionLogParameter
		parameterFuncs[18] = self._makeExplanationTextParameter
		
		self._params = params
	end

	local function getParameter(match)
		match = tonumber(match)
		return self._params[match]
	end

	msg = msg:gsub('$([1-9][0-9]*)', getParameter)
	return msg
end

function Blurb:_makeIntroParameter()
	-- parameter $1
	local key
	local action = self._protectionStatusObj:getAction()
	local level = self._protectionStatusObj:getLevel()
	if action == 'edit' and level == 'autoconfirmed' then
		key = 'reason-text-semi'
	elseif action == 'move' then
		key = 'reason-text-move'
	elseif action == 'create' then
		key = 'reason-text-create'
	else
		key = 'reason-text-default'
	end
	local msg = self._configObj:getMessage(key)
	return self:_substituteParameters(msg)
end

function Blurb:_makeUntilParameter()
	-- parameter $2
	-- "until" or "or until" depending on the expiry
	local expiry = self._protectionStatusObj:getExpiry()
	if expiry then
		return 'or until'
	else
		return 'until'
	end
end

function Blurb:_makeDisputesParameter()
	-- parameter $3
	-- "disputes", with or without a section link
	local section = self._section
	local disputes = self.configObj:getMessage('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:_makePagetypeParameter()
	-- parameter $4
	local pagetypes = self._configObj:getConfigTable('bannerPagetypes')
	local namespace = self._titleObj.namespace
	return pagetypes[namespace] or pagetypes.default or 'page'
end

function Blurb:_makeProtectionDateParameter()
	-- parameter $5
	local protectionDate = self._protectionStatusObj:getProtectionDate()
	if type(protectionDate) == 'number' then
		return Blurb.formatDate(protectionDate)
	else
		return protectionDate
	end
end

function Blurb:_makeVandalTemplateParameter()
	-- parameter $6
	local mVandalM = require('Module:Vandal-m')
	local username = self._username
	username = username or self._titleObj.baseText
	return mVandalM.luaMain{username}
end

function Blurb:_makeProtectionLevelParameter()
	-- parameter $7
	local action = self._protectionStatusObj:getAction()
	local level = self._protectionStatusObj:getLevel()
	local key
	if action == 'edit' then
		if level == 'sysop' then
			key = 'protection-level-full'
		elseif level == 'templateeditor' then
			key = 'protection-level-template'
		elseif level == 'autoconfirmed' then
			key = 'protection-level-semi'
		end
	elseif action == 'move' then
		key = 'protection-level-move'
	elseif action == 'create' then
		key = 'protection-level-create'
	else
		key = 'protection-level-default'
	end
	return self._configObj:getMessage(key)
end

function Blurb:_makeExpiryParameter()
	-- parameter $8
	-- @TODO: Check to see if the expiry is valid.
	local expiry = self._protectionStatusObj:getExpiry()
	if expiry == 'indef' then
		return nil
	elseif type(expiry) == 'number' then
		local formatted = Blurb.formatDate(expiry)
		return ' until ' .. formatted
	elseif expiry then
		-- Expiry is an error string.
		return expiry
	end
end

function Blurb:_makeDisputeLinkParameter()
	-- parameter $9
	-- A link to the page history or the move log, depending on the kind of
	-- protection.
	local action = self._protectionStatusObj:getAction()
	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._configObj:getMessage('dispute-move-link-display')
		)
	else
		-- We need the history link.
		return self.makeFullUrl(
			pagename,
			{action = 'history'},
			self._configObj:getMessage('dispute-edit-link-display')
		)
	end
end

function Blurb:_makeProtectionLogParameter()
	-- parameter $10
	local action = self._protectionStatusObj:getAction()
	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._configObj:getMessage('more-details-pc-log-display')
		)
	else
		-- We need the protection log.
		return self.makeFullUrl(
			'Special:Log',
			{type = 'protect', page = pagename},
			self._configObj:getMessage('more-details-protection-log-display')
		)
	end
end

function Blurb:_makeTalkLinkParameter()
	-- parameter $11
	local section = self._section
	local display = self._configObj:getMessage('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:_makeEditRequestParameter()
	-- parameter $12
	local mEditRequest = require('Module:Submit an edit request')
	local action = self._protectionStatusObj:getAction()
	local level = self._protectionStatusObj:getLevel()
	
	-- 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._configObj:getMessage(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:_makeRequestUnprotectionParameter()
	-- parameter $13
	if self._titleObj.namespace ~= 8 then
		-- MediaWiki pages can't be unprotected.
		return self._configObj:getMessage('request-unprotection-blurb')
	end
end

function Blurb:_makeSubjectPageLinksParameter()
	-- parameter $14
	-- Don't display these links if we are on a talk page.
	if not self._titleObj.isTalkPage then
		local msg = self._configObj:getMessage('semi-subject-page-links')
		return self:_substituteParameters(msg)
	end
end

function Blurb:_makeDeletionBlurbParameter()
	-- parameter $15
	local deletionDiscussionPage = self._deletionDiscussionPage
	local key
	if deletionDiscussionPage then
		key = 'deletion-discussion-blurb-xfd'
	else
		key = 'deletion-discussion-blurb-noxfd'
	end
	local msg = self._configObj:getMessage(msg)
	return self._substituteParameters(msg)
end

function Blurb:_makeDeletionDiscussionLinkParameter()
	-- parameter $16
	local deletionDiscussionPage = self._deletionDiscussionPage
	if deletionDiscussionPage then
		local display = self._configObj:getMessage('deletion-discussion-link-display')
		return string.format('[[%s|%s]]', deletionDiscussionPage, display)
	end
end

function Blurb:_makeDeletionLogParameter()
	-- parameter $17
	return Blurb.makeFullUrl(
		'Special:Log',
		{type = 'delete', page = self._titleObj.prefixedText},
		self._configObj:getMessage('deletion-log-link-display')
	)
end

function Blurb:_makeExplanationTextParameter()
	-- parameter $18
	local action = self._protectionStatusObj:getAction()
	local level = self._protectionStatusObj:getLevel()
	local key
	if action == 'edit' and level == 'autoconfirmed' then
		key = 'explanation-text-semi'
	elseif action == 'move' then
		key = 'explanation-text-move'
	elseif action == 'create' then
		key = 'explanation-text-create'
	else
		key = 'explanation-text-default'
	end
	local msg = self._configObj:getMessage(key)
	return self:_substituteParameters(msg)
end

function Blurb:makeReasonText()
	local msg = self._bannerConfig.text
	return self:_substituteParameters(msg)
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, action, level, namespace, expiry)
	if filename then
		self._imageFilename = filename
		return nil
	end
	
	if not action or not level then
		-- If the filename is not specified, we need the action and the level
		-- to find the image name. The namespace and the expiry are optional,
		-- however.
		return nil
	end

	-- 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:getMessage('image-filename-indef')
		return nil
	end
	
	-- Deal with regular protection types.
	local images = self._configObj:getConfigTable('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:getMessage('image-filename-default')
		or 'Transparent.gif'
	return mFileLink.new(filename)
		:width(self._imageWidth or 20)
		:alt(self._imageAlt)
		:link(self._imageLink)
		:caption(self._imageCaption)
		:render()
end

function BannerTemplate:render()
	-- Dummy method, to be implemented by the subclasses.
	return ''
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:render(page)
	-- Renders the banner.
	-- The page parameter specifies the page to generate the banner for, for
	-- testing purposes.
	mMessageBox = mMessageBox or require('Module:Message box')
	local reasonText = self._reasonText or error('no reason text set')
	local explanationText = self._explanationText
	local mbargs = {
		page = 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:render()
	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

--------------------------------------------------------------------------------
-- Category class
--------------------------------------------------------------------------------

local Category = class('Category')

function Category:initialize()
end

function Category:setName(name)
	self._name = name
end

function Category:export()
	if self._categoryName then
		return string.format(
			'[[%s:%s]]',
			mw.site.namespaces[14].name,
			self._categoryName
		)
	else
		return ''
	end
end

--------------------------------------------------------------------------------
-- ProtectionCategory class
--------------------------------------------------------------------------------

local ProtectionCategory = Category:subclass('ProtectionCategory')

function ProtectionCategory:setName(
		name,
		configObj,
		protectionStatusObj,
		namespace
	)
	--[[
	-- Sets the protection category. If a category name is not provided, this
	-- method gets a category name from the module config, given a combination
	-- of the protection type, the protection level, the namespace number, the
	-- reason for protection, and the expiry date.
	--]]
	
	-- If a name was provided, use that.
	if name then
		Category.setName(self, name)
	end
	
	-- Get the namespace category key from the namespace number.
	local nskey
	do
		local categoryNamespaces = configObj:getConfigTable('categoryNamespaces')
		if not namespace or type(namespace) ~= 'number' then
			nskey = nil
		else
			nskey = categoryNamespaces[ns]
			if not nskey and ns % 2 == 1 then
					nskey = 'talk'
			end
		end
	end
 
	--[[
	-- 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, keypos = 5, val = protectionStatusObj:getExpiry()},
		namespace = {order = 2, keypos = 3, val = nskey},
		reason = {order = 3, keypos = 4, val = protectionStatusObj:getReason()},
		level = {order = 4, keypos = 2, val = protectionStatusObj:getLevel()},
		action = {order = 5, keypos = 1, val = protectionStatusObj:getAction()}
	}
 
	--[[
	-- 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 bannerConfig = configObj:getBannerConfig(protectionStatusObj)
		local categoryOrder = bannerConfig.categoryOrder
		for propertiesKey, t in pairs(properties) do
			configOrder[t.order] = t
		end
		if categoryOrder then
			local property = properties[categoryOrder]
			if not property then
				local msg = '"'
					.. categoryOrder
					.. '" is not a valid value of cfg.reasons.'
					.. reason
					.. '.categoryOrder'
				error(msg)
			end
			table.insert(configOrder, table.remove(configOrder, property.order))
		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:getConfigTable('categories')
	local cat
	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
			cat = attempt
			break
		end
	end
	if cat then
		Category.setName(self, cat)
	else
		error(
			'No category match found;'
			.. ' please define the category for key "all-all-all-all-all"'
		)
	end
end

--------------------------------------------------------------------------------
-- ExpiryCategory class
--------------------------------------------------------------------------------

local ExpiryCategory = Category:subclass('ExpiryCategory')

--------------------------------------------------------------------------------
-- ErrorCategory class
--------------------------------------------------------------------------------

local ErrorCategory = Category:subclass('ErrorCategory')

--------------------------------------------------------------------------------
-- ProtectionBanner class
--------------------------------------------------------------------------------

local ProtectionBanner = {}

function ProtectionBanner.exportToWiki(frame, titleObj)
	mArguments = mArguments or require('Module:Arguments')
	local args = mArguments.getArgs(frame)
	return ProtectionBanner.exportToLua(args, titleObj)
end

function ProtectionBanner.exportToLua(args, titleObj)
	titleObj = titleObj or mw.title.getCurrentTitle()

	-- Get data objects
	local configObj = Config:new()
	local protectionObj = ProtectionStatus:new(args, configObj, titleObj)

	-- Initialise the blurb object
	local blurbObj = Blurb:new(configObj, protectionObj, titleObj)
	blurbObj:setDeletionDiscussionPage(args.xfd)
	blurbObj:setUsername(args.user)
	blurbObj:setSection(args.section)

	local ret = {}

	-- Render the banner
	do
		-- 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 = configObj:getBannerConfig(protectionObj)
		local imageFilename = bannerConfig.image
		bannerObj:setImageFilename(
			imageFilename,
			protectionObj:getAction(),
			protectionObj:getLevel(),
			titleObj.namespace,
			protectionObj:getExpiry()
		)
		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
		if not isPadlock then
			bannerObj:setReasonText(blurbObj:makeReasonText())
			bannerObj:setExplanationText(blurbObj:makeExplanationText())
		end

		ret[#ret + 1] = bannerObj:render()
	end
	
	-- Render the categories
	
	return table.concat(ret)	
end

function ProtectionBanner._exportClasses()
	-- This is used to export the classes for testing purposes.
	return {
		ProtectionStatus = ProtectionStatus,
		Config = Config,
		Blurb = Blurb,
		BannerTemplate = BannerTemplate,
		Banner = Banner,
		Padlock = Padlock,
		Category = Category,
		ProtectionCategory = ProtectionCategory,
		ErrorCategory = ErrorCategory,
		ExpiryCategory = ExpiryCategory,
	}
end

return ProtectionBanner