Difference between revisions of "Module:Message box"

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>Mr. Stradivarius
(fix sect regression)
>Mainframe98
 
(53 intermediate revisions by 23 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}}.
-- This is a meta-module for producing message box templates, including
-- {{mbox}}, {{ambox}}, {{imbox}}, {{tmbox}}, {{ombox}}, {{cmbox}} and {{fmbox}}.


-- Require necessary modules.
-- Load necessary modules.
local htmlBuilder = require('Module:HtmlBuilder')
require('Module:No globals')
local categoryHandler = require('Module:Category handler').main
local getArgs
local yesno = require('Module:Yesno')
local yesno = require('Module:Yesno')


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local lang = mw.language.getContentLanguage()
local lang = mw.language.getContentLanguage()


-- Set aliases for often-used functions to reduce table lookups.
-- Define constants
local format = mw.ustring.format
local CONFIG_MODULE = 'Module:Message box/configuration'
local tinsert = table.insert
local DEMOSPACES = {talk = 'tmbox', image = 'imbox', file = 'imbox', category = 'cmbox', article = 'ambox', main = 'ambox'}
local tconcat = table.concat
local TEMPLATE_STYLES = 'Module:Message box/%s.css'
local trim = mw.text.trim


local box = {}
--------------------------------------------------------------------------------
-- Helper functions
--------------------------------------------------------------------------------


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


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


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


function box.getNamespaceId(ns)
--------------------------------------------------------------------------------
    if not ns then return end
-- Box class definition
    if type(ns) == 'string' then
--------------------------------------------------------------------------------
        ns = lang:ucfirst(mw.ustring.lower(ns))
 
        if ns == 'Main' then
local MessageBox = {}
            ns = 0
MessageBox.__index = MessageBox
        end
 
    end
function MessageBox.new(boxType, args, cfg)
    local nsTable = mw.site.namespaces[ns]
args = args or {}
    if nsTable then
local obj = {}
        return nsTable.id
 
    end
obj.boxType = boxType
 
-- 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]]
obj.boxType = DEMOSPACES[demospace]
elseif string.find( demospace, 'talk' ) then
-- demo as a talk page
obj.cfg = cfg.tmbox
obj.boxType = 'tmbox'
else
-- default to ombox
obj.cfg = cfg.ombox
obj.boxType = 'ombox'
end
elseif ns == 0 then
obj.cfg = cfg.ambox -- main namespace
obj.boxType = 'ambox'
elseif ns == 6 then
obj.cfg = cfg.imbox -- file namespace
obj.boxType = 'imbox'
elseif ns == 14 then
obj.cfg = cfg.cmbox -- category namespace
obj.boxType = 'cmbox'
else
local nsTable = mw.site.namespaces[ns]
if nsTable and nsTable.isTalk then
obj.cfg = cfg.tmbox -- any talk namespace
obj.boxType = 'tmbox'
else
obj.cfg = cfg.ombox -- other namespaces or invalid input
obj.boxType = 'ombox'
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
end


function box.getMboxType(nsid)
function MessageBox:addCat(ns, cat, sort)
    -- Gets the mbox type from a namespace number.
if not cat then
    if nsid == 0 then
return nil
        return 'ambox' -- main namespace
end
    elseif nsid == 6 then
if sort then
        return 'imbox' -- file namespace
cat = string.format('[[Category:%s|%s]]', cat, sort)
    elseif nsid == 14 then
else
        return 'cmbox' -- category namespace
cat = string.format('[[Category:%s]]', cat)
    else
end
        local nsTable = mw.site.namespaces[nsid]
self.hasCategories = true
        if nsTable and nsTable.isTalk then
self.categories[ns] = self.categories[ns] or {}
            return 'tmbox' -- any talk namespace
table.insert(self.categories[ns], cat)
        else
            return 'ombox' -- other namespaces or invalid input
        end
    end
end
end


function box:addCat(ns, cat, sort)
function MessageBox:addClass(class)
    if type(cat) ~= 'string' then return end
if not class then
    local nsVals = {'main', 'template', 'all'}
return nil
    local tname
end
    for i, val in ipairs(nsVals) do
table.insert(self.classes, class)
        if ns == val then
            tname = ns .. 'Cats'
        end
    end
    if not tname then
        for i, val in ipairs(nsVals) do
            nsVals[i] = format('"%s"', val)
        end
        error('invalid ns parameter passed to box:addCat; valid values are ' .. mw.text.listToText(nsVals, nil, ' or '))
    end
    self[tname] = self[tname] or {}
    if type(sort) == 'string' then
        tinsert(self[tname], format('[[Category:%s|%s]]', cat, sort))
    else
        tinsert(self[tname], format('[[Category:%s]]', cat))
    end
end
end


function box:addClass(class)
function MessageBox:setParameters()
    if type(class) ~= 'string' then return end
local args = self.args
    self.classes = self.classes or {}
local cfg = self.cfg
    tinsert(self.classes, class)
 
end
-- 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)
)


function box:setTitle(args)
-- Add attributes, classes and styles.
    -- Get the title object and the namespace.
self.id = args.id
    self.pageTitle = getTitleObject(args.page ~= '' and args.page)
self.name = args.name
    self.title = self.pageTitle or mw.title.getCurrentTitle()
if self.name then
    self.demospace = args.demospace ~= '' and args.demospace or nil
self:addClass('box-' .. string.gsub(self.name,' ','_'))
    self.nsid = box.getNamespaceId(self.demospace) or self.title.namespace
end
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


function box:getConfig(boxType)
-- Set text style.
    -- Get the box config data from the data page.
self.textstyle = args.textstyle
    if boxType == 'mbox' then
        boxType = box.getMboxType(self.nsid)
    end
    local cfgTables = mw.loadData('Module:Message box/configuration')
    local cfg = cfgTables[boxType]
    if not cfg then
        local boxTypes = {}
        for k, v in pairs(dataTables) do
            tinsert(boxTypes, format('"%s"', k))
        end
        tinsert(boxTypes, '"mbox"')
        error(format('invalid message box type "%s"; valid types are %s', tostring(boxType), mw.text.listToText(boxTypes)), 2)
    end
    return cfg
end
   
function box:removeBlankArgs(cfg, args)
    -- Only allow blank arguments for the parameter names listed in cfg.allowBlankParams.
    local newArgs = {}
    for k, v in pairs(args) do
        if v ~= '' then
            newArgs[k] = v
        end
    end
    for i, param in ipairs(cfg.allowBlankParams or {}) do
        newArgs[param] = args[param]
    end
    return newArgs
end


function box:setBoxParameters(cfg, args)
-- Find if we are on the template page or not. This functionality is only
    -- Get type data.
-- used if useCollapsibleTextFields is set, or if both cfg.templateCategory
    self.type = args.type
-- and cfg.templateCategoryRequireName are set.
    local typeData = cfg.types[self.type]
self.useCollapsibleTextFields = cfg.useCollapsibleTextFields
    self.invalidTypeError = cfg.showInvalidTypeError and self.type and not typeData and true or false
if self.useCollapsibleTextFields
    typeData = typeData or cfg.types[cfg.default]
or cfg.templateCategory
    self.typeClass = typeData.class
and cfg.templateCategoryRequireName
    self.typeImage = typeData.image
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


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


    -- Find whether we are using a small message box.
-- Get other values.
    if cfg.allowSmall and (
self.fix = args.fix ~= '' and args.fix or nil
            cfg.smallParam and args.small == cfg.smallParam
local date
            or not cfg.smallParam and yesno(args.small)
if args.date and args.date ~= '' then
    )
date = args.date
    then
elseif args.date == '' and self.isTemplatePage then
        self.isSmall = true
date = lang:formatDate('F Y')
    else
end
        self.isSmall = false
if date then
    end
self.date = string.format(" <small class='date-container'>''(<span class='date'>%s</span>)''</small>", date)
           
end
self.info = args.info
if yesno(args.removalnotice) then
self.removalNotice = cfg.removalNotice
end
end


    -- Add attributes, classes and styles.
-- Set the non-collapsible text field. At the moment this is used by all box
    self.id = args.id
-- types other than ambox, and also by ambox when small=yes.
    self:addClass(cfg.usePlainlinksParam and yesno(args.plainlinks or true) and 'plainlinks')
if self.isSmall then
    for _, class in ipairs(cfg.classes or {}) do
self.text = args.smalltext or args.text
        self:addClass(class)
else
    end
self.text = args.text
    if self.isSmall then
end
        self:addClass(cfg.smallClass or 'mbox-small')
    end
    self:addClass(self.typeClass)
    self:addClass(args.class)
    self.style = args.style


    -- Set text style.
-- Set the below row.
    self.textstyle = args.textstyle
self.below = cfg.below and args.below


    -- Process data for collapsible text fields. At the moment these are only used in {{ambox}}.
-- General image settings.
    self.useCollapsibleTextFields = cfg.useCollapsibleTextFields
self.imageCellDiv = not self.isSmall and cfg.imageCellDiv
    if self.useCollapsibleTextFields then
self.imageEmptyCell = cfg.imageEmptyCell
        self.name = args.name
if cfg.imageEmptyCellStyle then
        local nameTitle = getTitleObject(self.name)
self.imageEmptyCellStyle = 'border:none;padding:0px;width:1px'
        self.isTemplatePage = nameTitle and self.title.prefixedText == ('Template:' .. nameTitle.text) and true or false
end


        -- Get the self.issue value.
-- Left image settings.
        if self.isSmall and args.smalltext then
local imageLeft = self.isSmall and args.smallimage or args.image
            self.issue = args.smalltext
if cfg.imageCheckBlank and imageLeft ~= 'blank' and imageLeft ~= 'none'
        else
or not cfg.imageCheckBlank and imageLeft ~= 'none'
            local sect
then
            if args.sect == '' then
self.imageLeft = imageLeft
                sect = 'This ' .. (cfg.sectionDefault or 'page')
if not imageLeft then
            elseif type(args.sect) == 'string' then
local imageSize = self.isSmall
                sect = 'This ' .. args.sect
and (cfg.imageSmallSize or '30x30px')
            end
or '40x40px'
            local issue = args.issue
self.imageLeft = string.format('[[File:%s|%s|link=|alt=]]', self.typeImage
            issue = type(issue) == 'string' and issue or nil
or 'Imbox notice.png', imageSize)
            local text = args.text
end
            text = type(text) == 'string' and text or nil
end
            local issues = {}
            tinsert(issues, sect)
            tinsert(issues, issue)
            tinsert(issues, text)
            self.issue = tconcat(issues, ' ')
        end


        -- Get the self.talk value.
-- Right image settings.
        local talk = args.talk
local imageRight = self.isSmall and args.smallimageright or args.imageright
        if talk == '' and self.isTemplatePage then
if not (cfg.imageRightNone and imageRight == 'none') then
            talk = '#'
self.imageRight = imageRight
        end
end
        if talk then
end
            -- See if the talk link exists and is for a talk or a content namespace.
            local talkTitle = getTitleObject(talk)
            if not talkTitle or not talkTitle.isTalkPage then
                -- If we couldn't process the talk page link, get the talk page of the current page.
                local success
                success, talkTitle = pcall(self.title.talkPageTitle, self.title)
                if not success then
                    talkTitle = nil
                end
            end
            if talkTitle and talkTitle.exists then
                local talkText = 'Relevant discussion may be found on'
                if talkTitle.isTalkPage then
                    talkText = format('%s [[%s|%s]].', talkText, talk, talkTitle.prefixedText)
                else
                    talkText = format('%s the [[%s#%s|talk page]].', talkText, talkTitle.prefixedText, talk)
                end
                self.talk = talkText
            end
        end


        -- Get other values.
function MessageBox:setMainspaceCategories()
        self.fix = args.fix
local args = self.args
        local date
local cfg = self.cfg
        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 = format(" <small>''(%s)''</small>", date)
        end
        self.info = args.info
    end


    -- Set the non-collapsible text field. At the moment this is used by all box types other than ambox,
if not cfg.allowMainspaceCategories then
    -- and also by ambox when small=yes.
return nil
    if self.isSmall then
end
        self.text = args.smalltext or args.text
    else
        self.text = args.text
    end


    -- Set the below row.
local nums = {}
    self.below = cfg.below and args.below
for _, prefix in ipairs{'cat', 'category', 'all'} do
args[prefix .. '1'] = args[prefix]
nums = union(nums, getArgNums(args, prefix))
end


    -- General image settings.
-- The following is roughly equivalent to the old {{Ambox/category}}.
    self.imageCellDiv = not self.isSmall and cfg.imageCellDiv and true or false
local date = args.date
    self.imageEmptyCell = cfg.imageEmptyCell
date = type(date) == 'string' and date
    if cfg.imageEmptyCellStyle then
local preposition = 'from'
        self.imageEmptyCellStyle = 'border:none;padding:0px;width:1px'
for _, num in ipairs(nums) do
    end
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


    -- Left image settings.
function MessageBox:setTemplateCategories()
    local imageLeft = self.isSmall and args.smallimage or args.image
local args = self.args
    if cfg.imageCheckBlank and imageLeft ~= 'blank' and imageLeft ~= 'none'
local cfg = self.cfg
        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 = format('[[File:%s|%s|link=|alt=]]', self.typeImage or 'Imbox notice.png', imageSize)
        end
    end


    -- Right image settings.
-- Add template categories.
    local imageRight = self.isSmall and args.smallimageright or args.imageright
if cfg.templateCategory then
    if not (cfg.imageRightNone and imageRight == 'none') then
if cfg.templateCategoryRequireName then
        self.imageRight = imageRight
if self.isTemplatePage then
    end
self:addCat(10, cfg.templateCategory)
end
elseif not self.title.isSubpage then
self:addCat(10, cfg.templateCategory)
end
end


    -- Add mainspace categories. At the moment these are only used in {{ambox}}.
-- Add template error categories.
    if cfg.allowMainspaceCategories then
if cfg.templateErrorCategory then
        if args.cat then
local templateErrorCategory = cfg.templateErrorCategory
            args.cat1 = args.cat
local templateCat, templateSort
        end
if not self.name and not self.title.isSubpage then
        self.catNums = getArgNums(args, 'cat')
templateCat = templateErrorCategory
        if args.category then
elseif self.isTemplatePage then
            args.category1 = args.category
local paramsToCheck = cfg.templateErrorParamsToCheck or {}
        end
local count = 0
        self.categoryNums = getArgNums(args, 'category')
for i, param in ipairs(paramsToCheck) do
        self.categoryParamNums = union(self.catNums, self.categoryNums)
if not args[param] then
        -- The following is roughly equivalent to the old {{Ambox/category}}.
count = count + 1
        local date = args.date
end
        date = type(date) == 'string' and date
end
        local preposition = 'from'
if count > 0 then
        for _, num in ipairs(self.categoryParamNums) do
templateCat = templateErrorCategory
            local mainCat = args['cat' .. tostring(num)] or args['category' .. tostring(num)]
templateSort = tostring(count)
            local allCat = args['all' .. tostring(num)]
end
            mainCat = type(mainCat) == 'string' and mainCat
if self.categoryNums and #self.categoryNums > 0 then
            allCat = type(allCat) == 'string' and allCat
templateCat = templateErrorCategory
            if mainCat and date then
templateSort = 'C'
                local catTitle = format('%s %s %s', mainCat, preposition, date)
end
                self:addCat('main', catTitle)
end
                catTitle = getTitleObject('Category:' .. catTitle)
self:addCat(10, templateCat, templateSort)
                if not catTitle or not catTitle.exists then
end
                    self:addCat('main', 'Articles with invalid date parameter in template')
end
                end
            elseif mainCat and not date then
                self:addCat('main', mainCat)
            end
            if allCat then
                self:addCat('main', allCat)
            end
        end
    end


    -- Add template-namespace categories.
function MessageBox:setAllNamespaceCategories()
    self.isTemplatePage = type(self.name) == 'string' and self.title.prefixedText == ('Template:' .. self.name)
-- Set categories for all namespaces.
    if cfg.templateCategory then
if self.invalidTypeError then
        if self.name then
local allSort = (self.title.namespace == 0 and 'Main:' or '') .. self.title.prefixedText
            if self.isTemplatePage then
self:addCat('all', 'Wikipedia message box parameter needs fixing', allSort)
                self:addCat('template', cfg.templateCategory)
end
            end
if self.isSubstituted then
        elseif not self.title.isSubpage then
self:addCat('all', 'Pages with incorrectly substituted templates')
            self:addCat('template', cfg.templateCategory)
end
        end
end
    end
   
    -- Add template error category.
    if cfg.templateErrorCategory then
        local templateErrorCategory = cfg.templateErrorCategory
        local templateCat, templateSort
        if not self.name and not self.title.isSubpage then
            templateCat = templateErrorCategory
        elseif type(self.name) == 'string' and self.title.prefixedText == ('Template:' .. self.name) 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('template', templateCat, templateSort)
    end


    -- Categories for all namespaces.
function MessageBox:setCategories()
    if self.invalidTypeError then
if self.title.namespace == 0 then
        local allSort = (nsid == 0 and 'Main:' or '') .. self.title.prefixedText
self:setMainspaceCategories()
        self:addCat('all', 'Wikipedia message box parameter needs fixing', allSort)
elseif self.title.namespace == 10 then
    end
self:setTemplateCategories()
    if self.isSubstituted then
end
        self:addCat('all', 'Pages with incorrectly substituted templates')
self:setAllNamespaceCategories()
    end
end


    -- Convert category tables to strings and pass them through [[Module:Category handler]].
function MessageBox:renderCategories()
    self.categories = categoryHandler{
if not self.hasCategories then
        main = tconcat(self.mainCats or {}),
-- No categories added, no need to pass them to Category handler so,
        template = tconcat(self.templateCats or {}),
-- if it was invoked, it would return the empty string.
        all = tconcat(self.allCats or {}),
-- So we shortcut and return the empty string.
        nocat = args.nocat,
return ""
        demospace = self.demospace,
end
        page = self.pageTitle and self.pageTitle.prefixedText or nil
-- 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
end


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


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


    -- Create the box table.
-- Add TemplateStyles
    local boxTable = root.tag('table')
root:wikitext(mw.getCurrentFrame():extensionTag{
    boxTable
name = 'templatestyles',
        .attr('id', self.id)
args = { src = TEMPLATE_STYLES:format(self.boxType) },
    for i, class in ipairs(self.classes or {}) do
})
        boxTable
            .addClass(class)
    end
    boxTable
        .cssText(self.style)
        .attr('role', 'presentation')


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


    -- Add the text.
boxTable:attr('id', self.id or nil)
    local textCell = row.tag('td').addClass('mbox-text')
for i, class in ipairs(self.classes or {}) do
    if self.useCollapsibleTextFields then
boxTable:addClass(class or nil)
        -- The message box uses advanced text parameters that allow things to be collapsible. At the
end
        -- moment, only ambox uses this.
boxTable
        textCell
:cssText(self.style or nil)
            .cssText(self.textstyle)
:attr('role', 'presentation')
        local textCellSpan = textCell.tag('span')
        textCellSpan
            .addClass('mbox-text-span')
            .wikitext(self.issue)
        if not self.isSmall then
            textCellSpan
                .tag('span')
                    .addClass('hide-when-compact')
                    .wikitext(self.talk and ' ' .. self.talk)
                    .wikitext(self.fix and ' ' .. self.fix)
        end
        textCellSpan
            .wikitext(self.date and ' ' .. self.date)
        if not self.isSmall then
            textCellSpan
                .tag('span')
                    .addClass('hide-when-compact')
                    .wikitext(self.info and ' ' .. self.info)
        end
    else
        -- Default text formatting - anything goes.
        textCell
            .cssText(self.textstyle)
            .wikitext(self.text)
    end


    -- Add the right-hand image.
if self.attrs then
    if self.imageRight then
boxTable:attr(self.attrs)
        local imageRightCell = row.tag('td').addClass('mbox-imageright')
end
        if self.imageCellDiv then
            imageRightCell = imageRightCell.tag('div').css('width', '52px') -- If we are using a div, redefine imageRightCell so that the image is inside it.
        end
        imageRightCell
            .wikitext(self.imageRight)
    end


    -- Add the below row.
-- Add the left-hand image.
    if self.below then
local row = boxTable:tag('tr')
        boxTable.tag('tr')
if self.imageLeft then
            .tag('td')
local imageLeftCell = row:tag('td'):addClass('mbox-image')
                .attr('colspan', self.imageRight and '3' or '2')
if self.imageCellDiv then
                .addClass('mbox-text')
-- If we are using a div, redefine imageLeftCell so that the image
                .cssText(self.textstyle)
-- is inside it. Divs use style="width: 52px;", which limits the
                .wikitext(self.below)
-- image width to 52px. If any images in a div are wider than that,
    end
-- they may overlap with the text or cause other display problems.
imageLeftCell = imageLeftCell:tag('div'):css('width', '52px')
end
imageLeftCell:wikitext(self.imageLeft or nil)
elseif self.imageEmptyCell then
-- Some message boxes define an empty cell if no image is specified, and
-- some don't. The old template code in templates where empty cells are
-- specified gives the following hint: "No image. Cell with some width
-- or padding necessary for text cell to have 100% width."
row:tag('td')
:addClass('mbox-empty-cell')
:cssText(self.imageEmptyCellStyle or nil)
end
 
-- Add the text.
local textCell = row:tag('td'):addClass('mbox-text')
if self.useCollapsibleTextFields then
-- The message box uses advanced text parameters that allow things to be
-- collapsible. At the moment, only ambox uses this.
textCell:cssText(self.textstyle or nil)
local textCellDiv = textCell:tag('div')
textCellDiv
:addClass('mbox-text-span')
:wikitext(self.issue or nil)
if (self.talk or self.fix) and not self.isSmall then
textCellDiv:tag('span')
:addClass('hide-when-compact')
:wikitext(self.talk and (' ' .. self.talk) or nil)
:wikitext(self.fix and (' ' .. self.fix) or nil)
end
textCellDiv:wikitext(self.date and (' ' .. self.date) or nil)
if self.info and not self.isSmall then
textCellDiv
:tag('span')
:addClass('hide-when-compact')
:wikitext(self.info and (' ' .. self.info) or nil)
end
if self.removalNotice then
textCellDiv:tag('small')
:addClass('hide-when-compact')
:tag('i')
:wikitext(string.format(" (%s)", self.removalNotice))
end
else
-- Default text formatting - anything goes.
textCell
:cssText(self.textstyle or nil)
:wikitext(self.text or nil)
end
 
-- Add the right-hand image.
if self.imageRight then
local imageRightCell = row:tag('td'):addClass('mbox-imageright')
if self.imageCellDiv then
-- If we are using a div, redefine imageRightCell so that the image
-- is inside it.
imageRightCell = imageRightCell:tag('div'):css('width', '52px')
end
imageRightCell
:wikitext(self.imageRight or nil)
end
 
-- Add the below row.
if self.below then
boxTable:tag('tr')
:tag('td')
:attr('colspan', self.imageRight and '3' or '2')
:addClass('mbox-text')
:cssText(self.textstyle or nil)
:wikitext(self.below or nil)
end
 
-- Add error message for invalid type parameters.
if self.invalidTypeError then
root:tag('div')
:css('text-align', 'center')
:wikitext(string.format(
'This message box is using an invalid "type=%s" parameter and needs fixing.',
self.type or ''
))
end
 
-- Add categories.
root:wikitext(self:renderCategories() or nil)
 
return tostring(root)
end


    -- Add error message for invalid type parameters.
--------------------------------------------------------------------------------
    if self.invalidTypeError then
-- Exports
        root
--------------------------------------------------------------------------------
            .tag('div')
                .addClass('error')
                .css('text-align', 'center')
                .wikitext(format('This message box is using an invalid type parameter (<code>type=%s</code>) and needs fixing.', self.type or ''))
    end


    -- Add categories.
local p, mt = {}, {}
    root
        .wikitext(self.categories)


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


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


local function makeWrapper(boxType)
function mt.__index(t, k)
    return function (frame)
return function (frame)
        -- If called via #invoke, use the args passed into the invoking
if not getArgs then
        -- template, or the args passed to #invoke if any exist. Otherwise
getArgs = require('Module:Arguments').getArgs
        -- assume args are being passed directly in from the debug console
end
        -- or from another Lua module.
return t.main(k, getArgs(frame, {trim = false, removeBlanks = false}))
        local origArgs
end
        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.
        local args = {}
        for k, v in pairs(origArgs) do
            if type(v) == 'string' then
                v = trim(v)
            end
            args[k] = v
        end
        return makeBox(boxType, args)
    end
end
end


return {
return setmetatable(p, mt)
    box = box,
    makeBox = makeBox,
    mbox = makeWrapper('mbox'),
    ambox = makeWrapper('ambox'),
    cmbox = makeWrapper('cmbox'),
    fmbox = makeWrapper('fmbox'),
    imbox = makeWrapper('imbox'),
    ombox = makeWrapper('ombox'),
    tmbox = makeWrapper('tmbox')
}

Latest revision as of 16:41, 29 September 2021

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

-- This is a meta-module for producing message box templates, including
-- {{mbox}}, {{ambox}}, {{imbox}}, {{tmbox}}, {{ombox}}, {{cmbox}} and {{fmbox}}.

-- Load necessary modules.
require('Module:No globals')
local getArgs
local yesno = require('Module:Yesno')

-- Get a language object for formatDate and ucfirst.
local lang = mw.language.getContentLanguage()

-- Define constants
local CONFIG_MODULE = 'Module:Message box/configuration'
local DEMOSPACES = {talk = 'tmbox', image = 'imbox', file = 'imbox', category = 'cmbox', article = 'ambox', main = 'ambox'}
local TEMPLATE_STYLES = 'Module:Message box/%s.css'

--------------------------------------------------------------------------------
-- 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 = {}

	obj.boxType = boxType

	-- 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]]
				obj.boxType = DEMOSPACES[demospace]
			elseif string.find( demospace, 'talk' ) then
				-- demo as a talk page
				obj.cfg = cfg.tmbox
				obj.boxType = 'tmbox'
			else
				-- default to ombox
				obj.cfg = cfg.ombox
				obj.boxType = 'ombox'
			end
		elseif ns == 0 then
			obj.cfg = cfg.ambox -- main namespace
			obj.boxType = 'ambox'
		elseif ns == 6 then
			obj.cfg = cfg.imbox -- file namespace
			obj.boxType = 'imbox'
		elseif ns == 14 then
			obj.cfg = cfg.cmbox -- category namespace
			obj.boxType = 'cmbox'
		else
			local nsTable = mw.site.namespaces[ns]
			if nsTable and nsTable.isTalk then
				obj.cfg = cfg.tmbox -- any talk namespace
				obj.boxType = 'tmbox'
			else
				obj.cfg = cfg.ombox -- other namespaces or invalid input
				obj.boxType = 'ombox'
			end
		end
	end

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

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

	return setmetatable(obj, MessageBox)
end

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

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

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

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

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

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

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

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

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

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

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

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

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

	-- General image settings.
	self.imageCellDiv = not self.isSmall and cfg.imageCellDiv
	self.imageEmptyCell = cfg.imageEmptyCell
	if cfg.imageEmptyCellStyle then
		self.imageEmptyCellStyle = 'border:none;padding:0px;width:1px'
	end

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

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

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

	if not cfg.allowMainspaceCategories then
		return nil
	end

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

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

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

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

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

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

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

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

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

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

	-- Add TemplateStyles
	root:wikitext(mw.getCurrentFrame():extensionTag{
		name = 'templatestyles',
		args = { src = TEMPLATE_STYLES:format(self.boxType) },
	})

	-- Create the box table.
	local boxTable
	-- Check for fmbox because not all interface messages have mw-parser-output
	-- which is necessary for TemplateStyles. Add the wrapper class if it is and
	-- then start the actual mbox, else start the mbox.
	if self.boxType == 'fmbox' then
		boxTable = root:tag('div')
			:addClass('mw-parser-output')
			:tag('table')
	else
		boxTable = root:tag('table')
	end

	boxTable:attr('id', self.id or nil)
	for i, class in ipairs(self.classes or {}) do
		boxTable:addClass(class or nil)
	end
	boxTable
		:cssText(self.style or nil)
		:attr('role', 'presentation')

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

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

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

	-- Add the right-hand image.
	if self.imageRight then
		local imageRightCell = row:tag('td'):addClass('mbox-imageright')
		if self.imageCellDiv then
			-- If we are using a div, redefine imageRightCell so that the image
			-- is inside it.
			imageRightCell = imageRightCell:tag('div'):css('width', '52px')
		end
		imageRightCell
			:wikitext(self.imageRight or nil)
	end

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

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

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

	return tostring(root)
end

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

local p, mt = {}, {}

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

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

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

return setmetatable(p, mt)