Module:Message box: Difference between revisions

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imported>Mr. Stradivarius
(more abstraction for box structure and better small=yes support)
m (Protected "Module:Message box": Important page ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite)))
 
(69 intermediate revisions by 12 users not shown)
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-- This is a meta-module for producing message box templates, including {{mbox}}, {{ambox}}, {{imbox}}, {{tmbox}}, {{ombox}}, {{cmbox}} and {{fmbox}}.
require('strict')
local getArgs
local yesno = require('Module:Yesno')
local lang = mw.language.getContentLanguage()


local htmlBuilder = require('Module:HtmlBuilder')
local CONFIG_MODULE = 'Module:Message box/configuration'
local DEMOSPACES = {talk = 'tmbox', image = 'imbox', file = 'imbox', category = 'cmbox', article = 'ambox', main = 'ambox'}


local p = {}
--------------------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------------------


local function generateBoxStructure()
local function getTitleObject(...)
    local root = htmlBuilder.create() -- Includes error messages and categories added after the box.
-- Get the title object, passing the function through pcall
    local box = root.tag('table')
-- in case we are over the expensive function count limit.
    local row = box.tag('tr')
local success, title = pcall(mw.title.new, ...)
    return root, box, row
if success then
return title
end
end
end


function p.build(data, args)
local function union(t1, t2)
    -- Process config data.
-- Returns the union of two arrays.
    local isSmall = args.small == 'yes' or args.small == true
local vals = {}
    local typeData = data.types[args.type]
for i, v in ipairs(t1) do
    local invalidType = args.type and not typeData and true or false
vals[v] = true
    typeData = typeData or data.types[data.default]
end
for i, v in ipairs(t2) do
vals[v] = true
end
local ret = {}
for k in pairs(vals) do
table.insert(ret, k)
end
table.sort(ret)
return ret
end
 
local function getArgNums(args, prefix)
local nums = {}
for k, v in pairs(args) do
local num = mw.ustring.match(tostring(k), '^' .. prefix .. '([1-9]%d*)$')
if num then
table.insert(nums, tonumber(num))
end
end
table.sort(nums)
return nums
end
 
--------------------------------------------------------------------------------
-- Box class definition
--------------------------------------------------------------------------------
 
local MessageBox = {}
MessageBox.__index = MessageBox
 
function MessageBox.new(boxType, args, cfg)
args = args or {}
local obj = {}
 
-- Set the title object and the namespace.
obj.title = getTitleObject(args.page) or mw.title.getCurrentTitle()
 
-- Set the config for our box type.
obj.cfg = cfg[boxType]
if not obj.cfg then
local ns = obj.title.namespace
-- boxType is "mbox" or invalid input
if args.demospace and args.demospace ~= '' then
-- implement demospace parameter of mbox
local demospace = string.lower(args.demospace)
if DEMOSPACES[demospace] then
-- use template from DEMOSPACES
obj.cfg = cfg[DEMOSPACES[demospace]]
elseif string.find( demospace, 'talk' ) then
-- demo as a talk page
obj.cfg = cfg.tmbox
else
-- default to ombox
obj.cfg = cfg.ombox
end
elseif ns == 0 then
obj.cfg = cfg.ambox -- main namespace
elseif ns == 6 then
obj.cfg = cfg.imbox -- file namespace
elseif ns == 14 then
obj.cfg = cfg.cmbox -- category namespace
else
local nsTable = mw.site.namespaces[ns]
if nsTable and nsTable.isTalk then
obj.cfg = cfg.tmbox -- any talk namespace
else
obj.cfg = cfg.ombox -- other namespaces or invalid input
end
end
end
 
-- Set the arguments, and remove all blank arguments except for the ones
-- listed in cfg.allowBlankParams.
do
local newArgs = {}
for k, v in pairs(args) do
if v ~= '' then
newArgs[k] = v
end
end
for i, param in ipairs(obj.cfg.allowBlankParams or {}) do
newArgs[param] = args[param]
end
obj.args = newArgs
end
 
-- Define internal data structure.
obj.categories = {}
obj.classes = {}
-- For lazy loading of [[Module:Category handler]].
obj.hasCategories = false
 
return setmetatable(obj, MessageBox)
end
 
function MessageBox:addCat(ns, cat, sort)
if not cat then
return nil
end
if sort then
cat = string.format('[[Category:%s|%s]]', cat, sort)
else
cat = string.format('[[Category:%s]]', cat)
end
self.hasCategories = true
self.categories[ns] = self.categories[ns] or {}
table.insert(self.categories[ns], cat)
end
 
function MessageBox:addClass(class)
if not class then
return nil
end
table.insert(self.classes, class)
end
 
function MessageBox:setParameters()
local args = self.args
local cfg = self.cfg
 
-- Get type data.
self.type = args.type
local typeData = cfg.types[self.type]
self.invalidTypeError = cfg.showInvalidTypeError
and self.type
and not typeData
typeData = typeData or cfg.types[cfg.default]
self.typeClass = typeData.class
self.typeImage = typeData.image
 
-- Find if the box has been wrongly substituted.
self.isSubstituted = cfg.substCheck and args.subst == 'SUBST'
 
-- Find whether we are using a small message box.
self.isSmall = cfg.allowSmall and (
cfg.smallParam and args.small == cfg.smallParam
or not cfg.smallParam and yesno(args.small)
)
 
-- Add attributes, classes and styles.
self.id = args.id
self.name = args.name
if self.name then
self:addClass('box-' .. string.gsub(self.name,' ','_'))
end
if yesno(args.plainlinks) ~= false then
self:addClass('plainlinks')
end
for _, class in ipairs(cfg.classes or {}) do
self:addClass(class)
end
if self.isSmall then
self:addClass(cfg.smallClass or 'mbox-small')
end
self:addClass(self.typeClass)
self:addClass(args.class)
self.style = args.style
self.attrs = args.attrs
 
-- Set text style.
self.textstyle = args.textstyle
 
-- Find if we are on the template page or not. This functionality is only
-- used if useCollapsibleTextFields is set, or if both cfg.templateCategory
-- and cfg.templateCategoryRequireName are set.
self.useCollapsibleTextFields = cfg.useCollapsibleTextFields
if self.useCollapsibleTextFields
or cfg.templateCategory
and cfg.templateCategoryRequireName
then
if self.name then
local templateName = mw.ustring.match(
self.name,
'^[tT][eE][mM][pP][lL][aA][tT][eE][%s_]*:[%s_]*(.*)$'
) or self.name
templateName = 'Template:' .. templateName
self.templateTitle = getTitleObject(templateName)
end
self.isTemplatePage = self.templateTitle
and mw.title.equals(self.title, self.templateTitle)
end
-- Process data for collapsible text fields. At the moment these are only
-- used in {{ambox}}.
if self.useCollapsibleTextFields then
-- Get the self.issue value.
if self.isSmall and args.smalltext then
self.issue = args.smalltext
else
local sect
if args.sect == '' then
sect = 'This ' .. (cfg.sectionDefault or 'page')
elseif type(args.sect) == 'string' then
sect = 'This ' .. args.sect
end
local issue = args.issue
issue = type(issue) == 'string' and issue ~= '' and issue or nil
local text = args.text
text = type(text) == 'string' and text or nil
local issues = {}
table.insert(issues, sect)
table.insert(issues, issue)
table.insert(issues, text)
self.issue = table.concat(issues, ' ')
end
 
-- Get the self.talk value.
local talk = args.talk
-- Show talk links on the template page or template subpages if the talk
-- parameter is blank.
if talk == ''
and self.templateTitle
and (
mw.title.equals(self.templateTitle, self.title)
or self.title:isSubpageOf(self.templateTitle)
)
then
talk = '#'
elseif talk == '' then
talk = nil
end
if talk then
-- If the talk value is a talk page, make a link to that page. Else
-- assume that it's a section heading, and make a link to the talk
-- page of the current page with that section heading.
local talkTitle = getTitleObject(talk)
local talkArgIsTalkPage = true
if not talkTitle or not talkTitle.isTalkPage then
talkArgIsTalkPage = false
talkTitle = getTitleObject(
self.title.text,
mw.site.namespaces[self.title.namespace].talk.id
)
end
if talkTitle and talkTitle.exists then
                local talkText
                if self.isSmall then
                    local talkLink = talkArgIsTalkPage and talk or (talkTitle.prefixedText .. '#' .. talk)
                    talkText = string.format('([[%s|talk]])', talkLink)
                else
                    talkText = 'Relevant discussion may be found on'
                    if talkArgIsTalkPage then
                        talkText = string.format(
                            '%s [[%s|%s]].',
                            talkText,
                            talk,
                            talkTitle.prefixedText
                        )
                    else
                        talkText = string.format(
                            '%s the [[%s#%s|talk page]].',
                            talkText,
                            talkTitle.prefixedText,
                            talk
                        )
                    end
                end
self.talk = talkText
end
end
 
-- Get other values.
self.fix = args.fix ~= '' and args.fix or nil
local date
if args.date and args.date ~= '' then
date = args.date
elseif args.date == '' and self.isTemplatePage then
date = lang:formatDate('F Y')
end
if date then
self.date = string.format(" <span class='date-container'><i>(<span class='date'>%s</span>)</i></span>", date)
end
self.info = args.info
if yesno(args.removalnotice) then
self.removalNotice = cfg.removalNotice
end
end
 
-- Set the non-collapsible text field. At the moment this is used by all box
-- types other than ambox, and also by ambox when small=yes.
if self.isSmall then
self.text = args.smalltext or args.text
else
self.text = args.text
end
 
-- Set the below row.
self.below = cfg.below and args.below


    local image, imageRight, text, imageSize
-- General image settings.
    if isSmall then
self.imageCellDiv = not self.isSmall and cfg.imageCellDiv
        image = args.smallimage or args.image
self.imageEmptyCell = cfg.imageEmptyCell
        imageRight = args.smallimageright or args.imageright
        text = args.smalltext or args.text
        imageSize = data.imageSizeSmall or data.imageSize
    else
        image = args.image
        imageRight = args.imageright
        text = args.text
        imageSize = data.imageSizeLarge or data.imageSize
    end


    -- Get the box structure.
-- Left image settings.
    local root, box, row = generateBoxStructure()
local imageLeft = self.isSmall and args.smallimage or args.image
if cfg.imageCheckBlank and imageLeft ~= 'blank' and imageLeft ~= 'none'
or not cfg.imageCheckBlank and imageLeft ~= 'none'
then
self.imageLeft = imageLeft
if not imageLeft then
local imageSize = self.isSmall
and (cfg.imageSmallSize or '30x30px')
or '40x40px'
self.imageLeft = string.format('[[File:%s|%s|link=|alt=]]', self.typeImage
or 'Imbox notice.png', imageSize)
end
end


    -- Build the box.
-- Right image settings.
    box
local imageRight = self.isSmall and args.smallimageright or args.imageright
        .attr('id', args.id)
if not (cfg.imageRightNone and imageRight == 'none') then
    for i, class in ipairs(data.classes) do
self.imageRight = imageRight
        box
end
            .addClass(class)
    end
-- set templatestyles
    box
self.base_templatestyles = cfg.templatestyles
        .addClass(typeData.class)
self.templatestyles = args.templatestyles
        .addClass(args.class)
end
        .cssText(args.style)
        .attr('role', 'presentation')


    -- Add the left-hand image.
function MessageBox:setMainspaceCategories()
    if image ~= 'none' then
local args = self.args
        row.tag('td')
local cfg = self.cfg
            .addClass('mbox-image')
            .wikitext(image or mw.ustring.format('[[File:%s|%s|link=|alt=]]', typeData.image, imageSize))
    elseif data.imageEmptyCell then
        row.tag('td')
            .addClass('mbox-empty-cell')
    end


    -- Add the text.
if not cfg.allowMainspaceCategories then
    row.tag('td')
return nil
        .addClass('mbox-text')
end
        .cssText(args.textstyle)
        .wikitext(text)


    -- Add the right-hand image.
local nums = {}
    if imageRight then
for _, prefix in ipairs{'cat', 'category', 'all'} do
        row.tag('td')
args[prefix .. '1'] = args[prefix]
            .addClass('mbox-imageright')
nums = union(nums, getArgNums(args, prefix))
            .wikitext(imageRight)
end
    end


    -- Add error messages and categories.
-- The following is roughly equivalent to the old {{Ambox/category}}.
    if invalidType then
local date = args.date
        local title = mw.title.getCurrentTitle()
date = type(date) == 'string' and date
        local catsort = (title.namespace == 0 and 'Main:' or '') .. title.prefixedText
local preposition = 'from'
        root.tag('div')
for _, num in ipairs(nums) do
            .css('text-align', 'center')
local mainCat = args['cat' .. tostring(num)]
            .wikitext(mw.ustring.format('This message box is using an invalid "type=%s" parameter and needs fixing.', args.type or ''))
or args['category' .. tostring(num)]
            .done()
local allCat = args['all' .. tostring(num)]
        .wikitext(mw.ustring.format('[[Category:Wikipedia message box parameter needs fixing|%s]]', catsort))
mainCat = type(mainCat) == 'string' and mainCat
    end
allCat = type(allCat) == 'string' and allCat
    return tostring(root)
if mainCat and date and date ~= '' then
local catTitle = string.format('%s %s %s', mainCat, preposition, date)
self:addCat(0, catTitle)
catTitle = getTitleObject('Category:' .. catTitle)
if not catTitle or not catTitle.exists then
self:addCat(0, 'Articles with invalid date parameter in template')
end
elseif mainCat and (not date or date == '') then
self:addCat(0, mainCat)
end
if allCat then
self:addCat(0, allCat)
end
end
end
end


function p._fmbox(args)
function MessageBox:setTemplateCategories()
    local data = {}
local args = self.args
    data.types = {
local cfg = self.cfg
        warning = {
 
            class = 'fmbox-warning',
-- Add template categories.
            image = 'Cmbox deletion.png'
if cfg.templateCategory then
        },
if cfg.templateCategoryRequireName then
        editnotice = {
if self.isTemplatePage then
            class = 'fmbox-editnotice',
self:addCat(10, cfg.templateCategory)
            image = 'Imbox notice.png'
end
        },
elseif not self.title.isSubpage then
        system = {
self:addCat(10, cfg.templateCategory)
            class = 'fmbox-system',
end
            image = 'Imbox notice.png'
end
        }
 
    }
-- Add template error categories.
    data.default = 'system'
if cfg.templateErrorCategory then
    data.classes = { 'plainlinks', 'fmbox' }
local templateErrorCategory = cfg.templateErrorCategory
    data.imageSize = '40x40px'
local templateCat, templateSort
    data.imageEmptyCell = false
if not self.name and not self.title.isSubpage then
    return p.build(data, args)
templateCat = templateErrorCategory
elseif self.isTemplatePage then
local paramsToCheck = cfg.templateErrorParamsToCheck or {}
local count = 0
for i, param in ipairs(paramsToCheck) do
if not args[param] then
count = count + 1
end
end
if count > 0 then
templateCat = templateErrorCategory
templateSort = tostring(count)
end
if self.categoryNums and #self.categoryNums > 0 then
templateCat = templateErrorCategory
templateSort = 'C'
end
end
self:addCat(10, templateCat, templateSort)
end
end
 
function MessageBox:setAllNamespaceCategories()
-- Set categories for all namespaces.
if self.invalidTypeError then
local allSort = (self.title.namespace == 0 and 'Main:' or '') .. self.title.prefixedText
self:addCat('all', 'Wikipedia message box parameter needs fixing', allSort)
end
if self.isSubstituted then
self:addCat('all', 'Pages with incorrectly substituted templates')
end
end
 
function MessageBox:setCategories()
if self.title.namespace == 0 then
self:setMainspaceCategories()
elseif self.title.namespace == 10 then
self:setTemplateCategories()
end
self:setAllNamespaceCategories()
end
 
function MessageBox:renderCategories()
if not self.hasCategories then
-- No categories added, no need to pass them to Category handler so,
-- if it was invoked, it would return the empty string.
-- So we shortcut and return the empty string.
return ""
end
-- Convert category tables to strings and pass them through
-- [[Module:Category handler]].
return require('Module:Category handler')._main{
main = table.concat(self.categories[0] or {}),
template = table.concat(self.categories[10] or {}),
all = table.concat(self.categories.all or {}),
nocat = self.args.nocat,
page = self.args.page
}
end
 
function MessageBox:export()
local root = mw.html.create()
 
-- Add the subst check error.
if self.isSubstituted and self.name then
root:tag('b')
:addClass('error')
:wikitext(string.format(
'Template <code>%s[[Template:%s|%s]]%s</code> has been incorrectly substituted.',
mw.text.nowiki('{{'), self.name, self.name, mw.text.nowiki('}}')
))
end
 
local frame = mw.getCurrentFrame()
root:wikitext(frame:extensionTag{
name = 'templatestyles',
args = { src = self.base_templatestyles },
})
-- Add support for a single custom templatestyles sheet. Undocumented as
-- need should be limited and many templates using mbox are substed; we
-- don't want to spread templatestyles sheets around to arbitrary places
if self.templatestyles then
root:wikitext(frame:extensionTag{
name = 'templatestyles',
args = { src = self.templatestyles },
})
end
 
-- Create the box table.
local boxTable = root:tag('table')
boxTable:attr('id', self.id or nil)
for i, class in ipairs(self.classes or {}) do
boxTable:addClass(class or nil)
end
boxTable
:cssText(self.style or nil)
:attr('role', 'presentation')
 
if self.attrs then
boxTable:attr(self.attrs)
end
 
-- Add the left-hand image.
local row = boxTable:tag('tr')
if self.imageLeft then
local imageLeftCell = row:tag('td'):addClass('mbox-image')
if self.imageCellDiv then
-- If we are using a div, redefine imageLeftCell so that the image
-- is inside it. Divs use style="width: 52px;", which limits the
-- image width to 52px. If any images in a div are wider than that,
-- they may overlap with the text or cause other display problems.
imageLeftCell = imageLeftCell:tag('div'):addClass('mbox-image-div')
end
imageLeftCell:wikitext(self.imageLeft or nil)
elseif self.imageEmptyCell then
-- Some message boxes define an empty cell if no image is specified, and
-- some don't. The old template code in templates where empty cells are
-- specified gives the following hint: "No image. Cell with some width
-- or padding necessary for text cell to have 100% width."
row:tag('td')
:addClass('mbox-empty-cell')
end
 
-- Add the text.
local textCell = row:tag('td'):addClass('mbox-text')
if self.useCollapsibleTextFields then
-- The message box uses advanced text parameters that allow things to be
-- collapsible. At the moment, only ambox uses this.
textCell:cssText(self.textstyle or nil)
local textCellDiv = textCell:tag('div')
textCellDiv
:addClass('mbox-text-span')
:wikitext(self.issue or nil)
if (self.talk or self.fix) then
textCellDiv:tag('span')
:addClass('hide-when-compact')
:wikitext(self.talk and (' ' .. self.talk) or nil)
:wikitext(self.fix and (' ' .. self.fix) or nil)
end
textCellDiv:wikitext(self.date and (' ' .. self.date) or nil)
if self.info and not self.isSmall then
textCellDiv
:tag('span')
:addClass('hide-when-compact')
:wikitext(self.info and (' ' .. self.info) or nil)
end
if self.removalNotice then
textCellDiv:tag('span')
:addClass('hide-when-compact')
:tag('i')
:wikitext(string.format(" (%s)", self.removalNotice))
end
else
-- Default text formatting - anything goes.
textCell
:cssText(self.textstyle or nil)
:wikitext(self.text or nil)
end
 
-- Add the right-hand image.
if self.imageRight then
local imageRightCell = row:tag('td'):addClass('mbox-imageright')
if self.imageCellDiv then
-- If we are using a div, redefine imageRightCell so that the image
-- is inside it.
imageRightCell = imageRightCell:tag('div'):addClass('mbox-image-div')
end
imageRightCell
:wikitext(self.imageRight or nil)
end
 
-- Add the below row.
if self.below then
boxTable:tag('tr')
:tag('td')
:attr('colspan', self.imageRight and '3' or '2')
:addClass('mbox-text')
:cssText(self.textstyle or nil)
:wikitext(self.below or nil)
end
 
-- Add error message for invalid type parameters.
if self.invalidTypeError then
root:tag('div')
:addClass('mbox-invalid-type')
:wikitext(string.format(
'This message box is using an invalid "type=%s" parameter and needs fixing.',
self.type or ''
))
end
 
-- Add categories.
root:wikitext(self:renderCategories() or nil)
 
return tostring(root)
end
end


function p._ombox(args)
--------------------------------------------------------------------------------
    local data = {}
-- Exports
    data.types = {
--------------------------------------------------------------------------------
        speedy = {
 
            class = 'ombox-speedy',
local p, mt = {}, {}
            image = 'Imbox speedy deletion.png'
 
        },
function p._exportClasses()
        delete = {
-- For testing.
            class = 'ombox-delete',
return {
            image = 'Imbox deletion.png'
MessageBox = MessageBox
        },
}
        content = {
            class = 'ombox-content',
            image = 'Imbox content.png'
        },
        style = {
            class = 'ombox-style',
            image = 'Edit-clear.svg'
        },
        move = {
            class = 'ombox-move',
            image = 'Imbox move.png'
        },
        protection = {
            class = 'ombox-protection',
            image = 'Imbox protection.png'
        },
        notice = {
            class = 'ombox-notice',
            image = 'Imbox notice.png'
        }
    }
    data.default = 'notice'
    data.classes = {'plainlinks', 'ombox'}
    data.imageSizeLarge = '40x40px'
    data.imageSizeSmall = '30x30px'
    data.imageEmptyCell = true
    return p.build(data, args)
end
end


local function makeWrapper(func)
function p.main(boxType, args, cfgTables)
    return function (frame)
local box = MessageBox.new(boxType, args, cfgTables or mw.loadData(CONFIG_MODULE))
        -- If called via #invoke, use the args passed into the invoking
box:setParameters()
        -- template, or the args passed to #invoke if any exist. Otherwise
box:setCategories()
        -- assume args are being passed directly in from the debug console
return box:export()
        -- or from another Lua module.
        local origArgs
        if frame == mw.getCurrentFrame() then
            origArgs = frame:getParent().args
            for k, v in pairs(frame.args) do
                origArgs = frame.args
                break
            end
        else
            origArgs = frame
        end
        -- Trim whitespace and remove blank arguments.
        local args = {}
        for k, v in pairs(origArgs) do
            if type(v) == 'string' then
                v = mw.text.trim(v)
            end
            if v ~= '' then
                args[k] = v
            end
        end
        return func(args)
    end
end
end


p.fmbox = makeWrapper(p._fmbox)
function mt.__index(t, k)
p.ombox = makeWrapper(p._ombox)
return function (frame)
if not getArgs then
getArgs = require('Module:Arguments').getArgs
end
return t.main(k, getArgs(frame, {trim = false, removeBlanks = false}))
end
end


return p
return setmetatable(p, mt)

Latest revision as of 03:34, 15 September 2023

Documentation for this module may be created at Module:Message box/doc

require('strict')
local getArgs
local yesno = require('Module:Yesno')
local lang = mw.language.getContentLanguage()

local CONFIG_MODULE = 'Module:Message box/configuration'
local DEMOSPACES = {talk = 'tmbox', image = 'imbox', file = 'imbox', category = 'cmbox', article = 'ambox', main = 'ambox'}

--------------------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------------------

local function getTitleObject(...)
	-- Get the title object, passing the function through pcall
	-- in case we are over the expensive function count limit.
	local success, title = pcall(mw.title.new, ...)
	if success then
		return title
	end
end

local function union(t1, t2)
	-- Returns the union of two arrays.
	local vals = {}
	for i, v in ipairs(t1) do
		vals[v] = true
	end
	for i, v in ipairs(t2) do
		vals[v] = true
	end
	local ret = {}
	for k in pairs(vals) do
		table.insert(ret, k)
	end
	table.sort(ret)
	return ret
end

local function getArgNums(args, prefix)
	local nums = {}
	for k, v in pairs(args) do
		local num = mw.ustring.match(tostring(k), '^' .. prefix .. '([1-9]%d*)$')
		if num then
			table.insert(nums, tonumber(num))
		end
	end
	table.sort(nums)
	return nums
end

--------------------------------------------------------------------------------
-- Box class definition
--------------------------------------------------------------------------------

local MessageBox = {}
MessageBox.__index = MessageBox

function MessageBox.new(boxType, args, cfg)
	args = args or {}
	local obj = {}

	-- Set the title object and the namespace.
	obj.title = getTitleObject(args.page) or mw.title.getCurrentTitle()

	-- Set the config for our box type.
	obj.cfg = cfg[boxType]
	if not obj.cfg then
		local ns = obj.title.namespace
		-- boxType is "mbox" or invalid input
		if args.demospace and args.demospace ~= '' then
			-- implement demospace parameter of mbox
			local demospace = string.lower(args.demospace)
			if DEMOSPACES[demospace] then
				-- use template from DEMOSPACES
				obj.cfg = cfg[DEMOSPACES[demospace]]
			elseif string.find( demospace, 'talk' ) then
				-- demo as a talk page
				obj.cfg = cfg.tmbox
			else
				-- default to ombox
				obj.cfg = cfg.ombox
			end
		elseif ns == 0 then
			obj.cfg = cfg.ambox -- main namespace
		elseif ns == 6 then
			obj.cfg = cfg.imbox -- file namespace
		elseif ns == 14 then
			obj.cfg = cfg.cmbox -- category namespace
		else
			local nsTable = mw.site.namespaces[ns]
			if nsTable and nsTable.isTalk then
				obj.cfg = cfg.tmbox -- any talk namespace
			else
				obj.cfg = cfg.ombox -- other namespaces or invalid input
			end
		end
	end

	-- Set the arguments, and remove all blank arguments except for the ones
	-- listed in cfg.allowBlankParams.
	do
		local newArgs = {}
		for k, v in pairs(args) do
			if v ~= '' then
				newArgs[k] = v
			end
		end
		for i, param in ipairs(obj.cfg.allowBlankParams or {}) do
			newArgs[param] = args[param]
		end
		obj.args = newArgs
	end

	-- Define internal data structure.
	obj.categories = {}
	obj.classes = {}
	-- For lazy loading of [[Module:Category handler]].
	obj.hasCategories = false

	return setmetatable(obj, MessageBox)
end

function MessageBox:addCat(ns, cat, sort)
	if not cat then
		return nil
	end
	if sort then
		cat = string.format('[[Category:%s|%s]]', cat, sort)
	else
		cat = string.format('[[Category:%s]]', cat)
	end
	self.hasCategories = true
	self.categories[ns] = self.categories[ns] or {}
	table.insert(self.categories[ns], cat)
end

function MessageBox:addClass(class)
	if not class then
		return nil
	end
	table.insert(self.classes, class)
end

function MessageBox:setParameters()
	local args = self.args
	local cfg = self.cfg

	-- Get type data.
	self.type = args.type
	local typeData = cfg.types[self.type]
	self.invalidTypeError = cfg.showInvalidTypeError
		and self.type
		and not typeData
	typeData = typeData or cfg.types[cfg.default]
	self.typeClass = typeData.class
	self.typeImage = typeData.image

	-- Find if the box has been wrongly substituted.
	self.isSubstituted = cfg.substCheck and args.subst == 'SUBST'

	-- Find whether we are using a small message box.
	self.isSmall = cfg.allowSmall and (
		cfg.smallParam and args.small == cfg.smallParam
		or not cfg.smallParam and yesno(args.small)
	)

	-- Add attributes, classes and styles.
	self.id = args.id
	self.name = args.name
	if self.name then
		self:addClass('box-' .. string.gsub(self.name,' ','_'))
	end
	if yesno(args.plainlinks) ~= false then
		self:addClass('plainlinks')
	end
	for _, class in ipairs(cfg.classes or {}) do
		self:addClass(class)
	end
	if self.isSmall then
		self:addClass(cfg.smallClass or 'mbox-small')
	end
	self:addClass(self.typeClass)
	self:addClass(args.class)
	self.style = args.style
	self.attrs = args.attrs

	-- Set text style.
	self.textstyle = args.textstyle

	-- Find if we are on the template page or not. This functionality is only
	-- used if useCollapsibleTextFields is set, or if both cfg.templateCategory
	-- and cfg.templateCategoryRequireName are set.
	self.useCollapsibleTextFields = cfg.useCollapsibleTextFields
	if self.useCollapsibleTextFields
		or cfg.templateCategory
		and cfg.templateCategoryRequireName
	then
		if self.name then
			local templateName = mw.ustring.match(
				self.name,
				'^[tT][eE][mM][pP][lL][aA][tT][eE][%s_]*:[%s_]*(.*)$'
			) or self.name
			templateName = 'Template:' .. templateName
			self.templateTitle = getTitleObject(templateName)
		end
		self.isTemplatePage = self.templateTitle
			and mw.title.equals(self.title, self.templateTitle)
	end
	
	-- Process data for collapsible text fields. At the moment these are only
	-- used in {{ambox}}.
	if self.useCollapsibleTextFields then
		-- Get the self.issue value.
		if self.isSmall and args.smalltext then
			self.issue = args.smalltext
		else
			local sect
			if args.sect == '' then
				sect = 'This ' .. (cfg.sectionDefault or 'page')
			elseif type(args.sect) == 'string' then
				sect = 'This ' .. args.sect
			end
			local issue = args.issue
			issue = type(issue) == 'string' and issue ~= '' and issue or nil
			local text = args.text
			text = type(text) == 'string' and text or nil
			local issues = {}
			table.insert(issues, sect)
			table.insert(issues, issue)
			table.insert(issues, text)
			self.issue = table.concat(issues, ' ')
		end

		-- Get the self.talk value.
		local talk = args.talk
		-- Show talk links on the template page or template subpages if the talk
		-- parameter is blank.
		if talk == ''
			and self.templateTitle
			and (
				mw.title.equals(self.templateTitle, self.title)
				or self.title:isSubpageOf(self.templateTitle)
			)
		then
			talk = '#'
		elseif talk == '' then
			talk = nil
		end
		if talk then
			-- If the talk value is a talk page, make a link to that page. Else
			-- assume that it's a section heading, and make a link to the talk
			-- page of the current page with that section heading.
			local talkTitle = getTitleObject(talk)
			local talkArgIsTalkPage = true
			if not talkTitle or not talkTitle.isTalkPage then
				talkArgIsTalkPage = false
				talkTitle = getTitleObject(
					self.title.text,
					mw.site.namespaces[self.title.namespace].talk.id
				)
			end
			if talkTitle and talkTitle.exists then
                local talkText
                if self.isSmall then
                    local talkLink = talkArgIsTalkPage and talk or (talkTitle.prefixedText .. '#' .. talk)
                    talkText = string.format('([[%s|talk]])', talkLink)
                else
                    talkText = 'Relevant discussion may be found on'
                    if talkArgIsTalkPage then
                        talkText = string.format(
                            '%s [[%s|%s]].',
                            talkText,
                            talk,
                            talkTitle.prefixedText
                        )
                    else
                        talkText = string.format(
                            '%s the [[%s#%s|talk page]].',
                            talkText,
                            talkTitle.prefixedText,
                            talk
                        )
                    end
                end
				self.talk = talkText
			end
		end

		-- Get other values.
		self.fix = args.fix ~= '' and args.fix or nil
		local date
		if args.date and args.date ~= '' then
			date = args.date
		elseif args.date == '' and self.isTemplatePage then
			date = lang:formatDate('F Y')
		end
		if date then
			self.date = string.format(" <span class='date-container'><i>(<span class='date'>%s</span>)</i></span>", date)
		end
		self.info = args.info
		if yesno(args.removalnotice) then
			self.removalNotice = cfg.removalNotice
		end
	end

	-- Set the non-collapsible text field. At the moment this is used by all box
	-- types other than ambox, and also by ambox when small=yes.
	if self.isSmall then
		self.text = args.smalltext or args.text
	else
		self.text = args.text
	end

	-- Set the below row.
	self.below = cfg.below and args.below

	-- General image settings.
	self.imageCellDiv = not self.isSmall and cfg.imageCellDiv
	self.imageEmptyCell = cfg.imageEmptyCell

	-- Left image settings.
	local imageLeft = self.isSmall and args.smallimage or args.image
	if cfg.imageCheckBlank and imageLeft ~= 'blank' and imageLeft ~= 'none'
		or not cfg.imageCheckBlank and imageLeft ~= 'none'
	then
		self.imageLeft = imageLeft
		if not imageLeft then
			local imageSize = self.isSmall
				and (cfg.imageSmallSize or '30x30px')
				or '40x40px'
			self.imageLeft = string.format('[[File:%s|%s|link=|alt=]]', self.typeImage
				or 'Imbox notice.png', imageSize)
		end
	end

	-- Right image settings.
	local imageRight = self.isSmall and args.smallimageright or args.imageright
	if not (cfg.imageRightNone and imageRight == 'none') then
		self.imageRight = imageRight
	end
	
	-- set templatestyles
	self.base_templatestyles = cfg.templatestyles
	self.templatestyles = args.templatestyles
end

function MessageBox:setMainspaceCategories()
	local args = self.args
	local cfg = self.cfg

	if not cfg.allowMainspaceCategories then
		return nil
	end

	local nums = {}
	for _, prefix in ipairs{'cat', 'category', 'all'} do
		args[prefix .. '1'] = args[prefix]
		nums = union(nums, getArgNums(args, prefix))
	end

	-- The following is roughly equivalent to the old {{Ambox/category}}.
	local date = args.date
	date = type(date) == 'string' and date
	local preposition = 'from'
	for _, num in ipairs(nums) do
		local mainCat = args['cat' .. tostring(num)]
			or args['category' .. tostring(num)]
		local allCat = args['all' .. tostring(num)]
		mainCat = type(mainCat) == 'string' and mainCat
		allCat = type(allCat) == 'string' and allCat
		if mainCat and date and date ~= '' then
			local catTitle = string.format('%s %s %s', mainCat, preposition, date)
			self:addCat(0, catTitle)
			catTitle = getTitleObject('Category:' .. catTitle)
			if not catTitle or not catTitle.exists then
				self:addCat(0, 'Articles with invalid date parameter in template')
			end
		elseif mainCat and (not date or date == '') then
			self:addCat(0, mainCat)
		end
		if allCat then
			self:addCat(0, allCat)
		end
	end
end

function MessageBox:setTemplateCategories()
	local args = self.args
	local cfg = self.cfg

	-- Add template categories.
	if cfg.templateCategory then
		if cfg.templateCategoryRequireName then
			if self.isTemplatePage then
				self:addCat(10, cfg.templateCategory)
			end
		elseif not self.title.isSubpage then
			self:addCat(10, cfg.templateCategory)
		end
	end

	-- Add template error categories.
	if cfg.templateErrorCategory then
		local templateErrorCategory = cfg.templateErrorCategory
		local templateCat, templateSort
		if not self.name and not self.title.isSubpage then
			templateCat = templateErrorCategory
		elseif self.isTemplatePage then
			local paramsToCheck = cfg.templateErrorParamsToCheck or {}
			local count = 0
			for i, param in ipairs(paramsToCheck) do
				if not args[param] then
					count = count + 1
				end
			end
			if count > 0 then
				templateCat = templateErrorCategory
				templateSort = tostring(count)
			end
			if self.categoryNums and #self.categoryNums > 0 then
				templateCat = templateErrorCategory
				templateSort = 'C'
			end
		end
		self:addCat(10, templateCat, templateSort)
	end
end

function MessageBox:setAllNamespaceCategories()
	-- Set categories for all namespaces.
	if self.invalidTypeError then
		local allSort = (self.title.namespace == 0 and 'Main:' or '') .. self.title.prefixedText
		self:addCat('all', 'Wikipedia message box parameter needs fixing', allSort)
	end
	if self.isSubstituted then
		self:addCat('all', 'Pages with incorrectly substituted templates')
	end
end

function MessageBox:setCategories()
	if self.title.namespace == 0 then
		self:setMainspaceCategories()
	elseif self.title.namespace == 10 then
		self:setTemplateCategories()
	end
	self:setAllNamespaceCategories()
end

function MessageBox:renderCategories()
	if not self.hasCategories then
		-- No categories added, no need to pass them to Category handler so,
		-- if it was invoked, it would return the empty string.
		-- So we shortcut and return the empty string.
		return ""
	end
	-- Convert category tables to strings and pass them through
	-- [[Module:Category handler]].
	return require('Module:Category handler')._main{
		main = table.concat(self.categories[0] or {}),
		template = table.concat(self.categories[10] or {}),
		all = table.concat(self.categories.all or {}),
		nocat = self.args.nocat,
		page = self.args.page
	}
end

function MessageBox:export()
	local root = mw.html.create()

	-- Add the subst check error.
	if self.isSubstituted and self.name then
		root:tag('b')
			:addClass('error')
			:wikitext(string.format(
				'Template <code>%s[[Template:%s|%s]]%s</code> has been incorrectly substituted.',
				mw.text.nowiki('{{'), self.name, self.name, mw.text.nowiki('}}')
			))
	end

	local frame = mw.getCurrentFrame()
	root:wikitext(frame:extensionTag{
		name = 'templatestyles',
		args = { src = self.base_templatestyles },
	})
	-- Add support for a single custom templatestyles sheet. Undocumented as
	-- need should be limited and many templates using mbox are substed; we
	-- don't want to spread templatestyles sheets around to arbitrary places
	if self.templatestyles then
		root:wikitext(frame:extensionTag{
			name = 'templatestyles',
			args = { src = self.templatestyles },
		})
	end

	-- Create the box table.
	local boxTable = root:tag('table')
	boxTable:attr('id', self.id or nil)
	for i, class in ipairs(self.classes or {}) do
		boxTable:addClass(class or nil)
	end
	boxTable
		:cssText(self.style or nil)
		:attr('role', 'presentation')

	if self.attrs then
		boxTable:attr(self.attrs)
	end

	-- Add the left-hand image.
	local row = boxTable:tag('tr')
	if self.imageLeft then
		local imageLeftCell = row:tag('td'):addClass('mbox-image')
		if self.imageCellDiv then
			-- If we are using a div, redefine imageLeftCell so that the image
			-- is inside it. Divs use style="width: 52px;", which limits the
			-- image width to 52px. If any images in a div are wider than that,
			-- they may overlap with the text or cause other display problems.
			imageLeftCell = imageLeftCell:tag('div'):addClass('mbox-image-div')
		end
		imageLeftCell:wikitext(self.imageLeft or nil)
	elseif self.imageEmptyCell then
		-- Some message boxes define an empty cell if no image is specified, and
		-- some don't. The old template code in templates where empty cells are
		-- specified gives the following hint: "No image. Cell with some width
		-- or padding necessary for text cell to have 100% width."
		row:tag('td')
			:addClass('mbox-empty-cell')
	end

	-- Add the text.
	local textCell = row:tag('td'):addClass('mbox-text')
	if self.useCollapsibleTextFields then
		-- The message box uses advanced text parameters that allow things to be
		-- collapsible. At the moment, only ambox uses this.
		textCell:cssText(self.textstyle or nil)
		local textCellDiv = textCell:tag('div')
		textCellDiv
			:addClass('mbox-text-span')
			:wikitext(self.issue or nil)
		if (self.talk or self.fix) then
			textCellDiv:tag('span')
				:addClass('hide-when-compact')
				:wikitext(self.talk and (' ' .. self.talk) or nil)
				:wikitext(self.fix and (' ' .. self.fix) or nil)
		end
		textCellDiv:wikitext(self.date and (' ' .. self.date) or nil)
		if self.info and not self.isSmall then
			textCellDiv
				:tag('span')
				:addClass('hide-when-compact')
				:wikitext(self.info and (' ' .. self.info) or nil)
		end
		if self.removalNotice then
			textCellDiv:tag('span')
				:addClass('hide-when-compact')
				:tag('i')
					:wikitext(string.format(" (%s)", self.removalNotice))
		end
	else
		-- Default text formatting - anything goes.
		textCell
			:cssText(self.textstyle or nil)
			:wikitext(self.text or nil)
	end

	-- Add the right-hand image.
	if self.imageRight then
		local imageRightCell = row:tag('td'):addClass('mbox-imageright')
		if self.imageCellDiv then
			-- If we are using a div, redefine imageRightCell so that the image
			-- is inside it.
			imageRightCell = imageRightCell:tag('div'):addClass('mbox-image-div')
		end
		imageRightCell
			:wikitext(self.imageRight or nil)
	end

	-- Add the below row.
	if self.below then
		boxTable:tag('tr')
			:tag('td')
				:attr('colspan', self.imageRight and '3' or '2')
				:addClass('mbox-text')
				:cssText(self.textstyle or nil)
				:wikitext(self.below or nil)
	end

	-- Add error message for invalid type parameters.
	if self.invalidTypeError then
		root:tag('div')
			:addClass('mbox-invalid-type')
			:wikitext(string.format(
				'This message box is using an invalid "type=%s" parameter and needs fixing.',
				self.type or ''
			))
	end

	-- Add categories.
	root:wikitext(self:renderCategories() or nil)

	return tostring(root)
end

--------------------------------------------------------------------------------
-- Exports
--------------------------------------------------------------------------------

local p, mt = {}, {}

function p._exportClasses()
	-- For testing.
	return {
		MessageBox = MessageBox
	}
end

function p.main(boxType, args, cfgTables)
	local box = MessageBox.new(boxType, args, cfgTables or mw.loadData(CONFIG_MODULE))
	box:setParameters()
	box:setCategories()
	return box:export()
end

function mt.__index(t, k)
	return function (frame)
		if not getArgs then
			getArgs = require('Module:Arguments').getArgs
		end
		return t.main(k, getArgs(frame, {trim = false, removeBlanks = false}))
	end
end

return setmetatable(p, mt)