Module:Hatnote

--                             Module:Hatnote                                -- --                                                                           -- -- This module produces hatnote links and links to related articles. It      -- -- implements the and  meta-templates and includes -- -- helper functions for other Lua hatnote modules. --

local libraryUtil = require('libraryUtil') local checkType = libraryUtil.checkType local checkTypeForNamedArg = libraryUtil.checkTypeForNamedArg local mArguments -- lazily initialise Module:Arguments local yesno -- lazily initialise Module:Yesno

local p = {}

-- Helper functions

local function getArgs(frame) -- Fetches the arguments from the parent frame. Whitespace is trimmed and -- blanks are removed. mArguments = require('Module:Arguments') return mArguments.getArgs(frame, {parentOnly = true}) end

local function removeInitialColon(s) -- Removes the initial colon from a string, if present. return s:match('^:?(.*)') end

function p.findNamespaceId(link, removeColon) -- Finds the namespace id (namespace number) of a link or a pagename. This -- function will not work if the link is enclosed in double brackets. Colons -- are trimmed from the start of the link by default. To skip colon -- trimming, set the removeColon parameter to false. checkType('findNamespaceId', 1, link, 'string') checkType('findNamespaceId', 2, removeColon, 'boolean', true) if removeColon ~= false then link = removeInitialColon(link) end local namespace = link:match('^(.-):') if namespace then local nsTable = mw.site.namespaces[namespace] if nsTable then return nsTable.id		end end return 0 end

function p.formatPages(...) -- Formats a list of pages using formatLink and returns it as an array. Nil -- values are not allowed. local pages = {...} local ret = {} for i, page in ipairs(pages) do		ret[i] = p._formatLink{link = page} end return ret end

function p.formatPageTables(...) -- Takes a list of page/display tables and returns it as a list of -- formatted links. Nil values are not allowed. local pages = {...} local links = {} for i, t in ipairs(pages) do		checkType('formatPageTables', i, t, 'table') local link = t[1] local display = t[2] links[i] = p._formatLink{link = link, display = display} end return links end

function p.makeWikitextError(msg, helpLink, addTrackingCategory, title) -- Formats an error message to be returned to wikitext. If	-- addTrackingCategory is not false after being returned from -- Module:Yesno, and if we are not on a talk page, a tracking category -- is added. checkType('makeWikitextError', 1, msg, 'string') checkType('makeWikitextError', 2, helpLink, 'string', true) yesno = require('Module:Yesno') title = title or mw.title.getCurrentTitle -- Make the help link text. local helpText if helpLink then helpText = ' (help)' else helpText = '' end -- Make the category text. local category if not title.isTalkPage -- Don't categorise talk pages and title.namespace ~= 2 -- Don't categorise userspace and yesno(addTrackingCategory) ~= false -- Allow opting out then category = 'Hatnote templates with errors' category = string.format(			'%s:%s',			mw.site.namespaces[14].name,			category		) else category = '' end return string.format(		' Error: %s%s. %s',		msg,		helpText,		category	) end

function p.disambiguate(page, disambiguator) -- Formats a page title with a disambiguation parenthetical, -- i.e. "Example" → "Example (disambiguation)". checkType('disambiguate', 1, page, 'string') checkType('disambiguate', 2, disambiguator, 'string', true) disambiguator = disambiguator or 'disambiguation' return string.format('%s (%s)', page, disambiguator) end

-- Format link -- -- Makes a wikilink from the given link and display values. Links are escaped -- with colons if necessary, and links to sections are detected and displayed -- with " § " as a separator rather than the standard MediaWiki "#". Used in -- the template.

function p.formatLink(frame) -- The formatLink export function, for use in templates. yesno = require('Module:Yesno') local args = getArgs(frame) local link = args[1] if not link then return p.makeWikitextError(			'no link specified',			'Template:Format link#Errors',			args.category		) end return p._formatLink{ link = link, display = args[2], italicizePage = yesno(args.italicizepage), italicizeSection = yesno(args.italicizesection), } end

local function italicize(s) -- Italicize a string. return  .. s ..  end

local function maybeItalicize(s, shouldItalicize) -- italicize s if s is a string and the shouldItalicize parameter is true. if s and shouldItalicize then return italicize(s) else return s	end end

local function parseLink(link) -- Parse a link and return a table with the link's components. -- These components are: -- - link: the link, stripped of any initial colon (always present) -- - page: the page name (always present) -- - section: the page name (may be nil) -- - display: the display text, if manually entered after a pipe (may be nil) link = removeInitialColon(link)

-- Find whether a faux display value has been added with the | magic -- word. local prePipe, display = link:match('^(.-)|(.*)$') link = prePipe or link

-- Find the page, if it exists. -- For links like, the page will be nil. local preHash, postHash = link:match('^(.-)#(.*)$') local page if not preHash then -- We have a link like Foo. page = link elseif preHash ~= '' then -- We have a link like Foo. page = preHash end

-- Find the section, if it exists. local section if postHash and postHash ~= '' then section = postHash end return { link = link, page = page, section = section, display = display, } end

function p._formatLink(options) -- The formatLink export function, for use in modules. checkType('_formatLink', 1, options, 'table') checkTypeForNamedArg('_formatLink', 'link', options.link, 'string', false) checkTypeForNamedArg(		'_formatLink',		'display',		options.display,		'string',		true	) checkTypeForNamedArg(		'_formatLink',		'italicizePage',		options.italicizePage,		'boolean',		true	) checkTypeForNamedArg(		'_formatLink',		'italicizeSection',		options.italicizeSection,		'boolean',		true	)

local parsed = parseLink(options.link) local display = options.display or parsed.display -- Deal with the case where we don't have to pipe the link if not display and not parsed.section and not options.italicizePage then return string.format('%s', parsed.link) end -- Find the display text for piped links if not display then local page = maybeItalicize(parsed.page, options.italicizePage) local section = maybeItalicize(parsed.section, options.italicizeSection) if not page then display = string.format('§ %s', section) elseif section then display = string.format('%s § %s', page, section) else display = page end end return string.format('%s', parsed.link, display) end

-- Hatnote -- -- Produces standard hatnote text. Implements the template.

function p.hatnote(frame) local args = getArgs(frame) local s = args[1] local options = {} if not s then return p.makeWikitextError(			'no text specified',			'Template:Hatnote#Errors',			args.category		) end options.extraclasses = args.extraclasses options.selfref = args.selfref return p._hatnote(s, options) end

function p._hatnote(s, options) checkType('_hatnote', 1, s, 'string') checkType('_hatnote', 2, options, 'table', true) options = options or {} local classes = {'hatnote', 'navigation-not-searchable'} local extraclasses = options.extraclasses local selfref = options.selfref if type(extraclasses) == 'string' then classes[#classes + 1] = extraclasses end if selfref then classes[#classes + 1] = 'selfref' end return string.format(		'%s %s ',		mw.getCurrentFrame:extensionTag{			name = 'templatestyles', args = { src = 'Module:Hatnote/styles.css' }		},		table.concat(classes, ' '),		s	) end

return p