Difference between revisions of "Module:Hatnote"

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


local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType
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 true.
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(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, display)
end
return links
end
function p.makeWikitextError(msg, helpLink, addTrackingCategory)
-- 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')
local title = mw.title.getCurrentTitle()
-- Make the help link text.
local helpText
if helpLink then
helpText = ' ([[' .. helpLink .. '|help]])'
else
helpText = ''
end
-- Make the category text.
local category
if not title.isTalkPage and yesno(addTrackingCategory) ~= false then
category = 'Hatnote templates with errors'
category = string.format(
'[[%s:%s]]',
mw.site.namespaces[14].name,
category
)
else
category = ''
end
return string.format(
'<strong class="error">Error: %s%s.</strong>%s',
msg,
helpText,
category
)
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 {{format hatnote link}} template.
--------------------------------------------------------------------------------
function p.formatLink(frame)
local args = getArgs(frame)
local link = args[1]
local display = args[2]
if not link then
return p.makeWikitextError(
'no link specified',
'Template:Format hatnote link#Errors',
args.category
)
end
return p._formatLink(link, display)
end
function p._formatLink(link, display)
-- Find whether we need to use the colon trick or not. We need to use the
-- colon trick for categories and files, as otherwise category links
-- categorise the page and file links display the file.
checkType('_formatLink', 1, link, 'string')
checkType('_formatLink', 2, display, 'string', true)
link = removeInitialColon(link)
local namespace = p.findNamespaceId(link, false)
local colon
if namespace == 6 or namespace == 14 then
colon = ':'
else
colon = ''
end
-- Find whether a faux display value has been added with the {{!}} magic
-- word.
if not display then
local prePipe, postPipe = link:match('^(.-)|(.*)$')
link = prePipe or link
display = postPipe
end
-- Find the display value.
if not display then
local page, section = link:match('^(.-)#(.*)$')
if page then
display = page .. ' § ' .. section
end
end
-- Assemble the link.
if display then
return string.format('[[%s%s|%s]]', colon, link, display)
else
return string.format('[[%s%s]]', colon, link)
end
end
--------------------------------------------------------------------------------
-- Hatnote
--
-- Produces standard hatnote text. Implements the {{hatnote}} 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)
local classes = {'hatnote'}
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(
'<div class="%s">%s</div>',
table.concat(classes, ' '),
s
)
end
return p

Latest revision as of 13:43, 4 January 2016

Retrieved from "https://learnche.org/wiki_4C3/index.php?title=Module:Hatnote&oldid=1489"