Difference between revisions of "Module:Hatnote"

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<includeonly>{{#invoke:Hatnote|hatnote}}</includeonly><noinclude>
--                              Module:Hatnote                               --
+
{{documentation}}
--                                                                            --
+
<!-- Categories go on the /doc subpage, and interwikis go on Wikidata. -->
-- This module produces hatnote links and links to related articles. It      --
+
</noinclude>
-- 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 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(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, 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 = ' ([[' .. 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
 
 
 
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 {{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)
 
checkType('_formatLink', 1, link, 'string')
 
checkType('_formatLink', 2, display, 'string', true)
 
 
 
-- Remove the initial colon for links where it was specified manually.
 
link = removeInitialColon(link)
 
 
 
-- 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 .. ' §&nbsp;' .. section
 
end
 
end
 
 
 
-- Assemble the link.
 
if display then
 
return string.format(
 
'[[:%s|%s]]',
 
string.gsub(link, '|(.*)$', ''), --display overwrites manual piping
 
display
 
)
 
else
 
return string.format('[[:%s]]', 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)
 
options = options or {}
 
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 role="note" class="%s">%s</div>',
 
table.concat(classes, ' '),
 
s
 
)
 
end
 
 
 
return p
 

Revision as of 15:55, 23 May 2014

Module documentation[view] [edit] [history] [purge]

Template:High-risk

This is a meta-module that provides various functions for making hatnotes. It implements the {{hatnote}} template, for use in hatnotes at the top of pages, and the {{format link}} template, which is used to format a wikilink for use in hatnotes. It also contains a number of helper functions for use in other Lua hatnote modules.

Use from wikitext

The functions in this module cannot be used directly from #invoke, and must be used through templates instead. Please see Template:Hatnote and Template:Format link for documentation.

Use from other Lua modules

To load this module from another Lua module, use the following code.

<source lang="lua"> local mHatnote = require('Module:Hatnote') </source>

You can then use the functions as documented below.

Hatnote

<source lang="lua"> mHatnote._hatnote(s, options) </source>

Formats the string s as a hatnote. This encloses s in the tags <div class="hatnote">...</div>. Options are provided in the options table. Options include:

  • options.extraclasses - a string of extra classes to provide
  • options.selfref - if this is not nil or false, adds the class "selfref", used to denote self-references to Wikipedia (see Template:Selfref))

The CSS of the hatnote class is defined in MediaWiki:Common.css.

Example 1

<source lang="lua"> mHatnote._hatnote('This is a hatnote.') </source>

Produces: <div class="hatnote">This is a hatnote.</div>

Displays as:

This is a hatnote.
Example 2

<source lang="lua"> mHatnote._hatnote('This is a hatnote.', {extraclasses = 'boilerplate seealso', selfref = true}) </source>

Produces: <div class="hatnote boilerplate seealso selfref">This is a hatnote.</div>

Displayed as:

This is a hatnote.

Format link

<source lang="lua"> mHatnote._formatLink(link, display) </source>

Formats link as a wikilink for display in hatnote templates, with optional display value display. Categories and files are automatically escaped with the colon trick, and links to sections are automatically formatted as page § section, rather than the MediaWiki default of page#section.

Examples
Template:Code → [[Lion]] → Template:Format hatnote link
Template:Code → [[Lion#Etymology|Lion § Etymology]] → Template:Format hatnote link
Template:Code → [[:Category:Lions]] → Template:Format hatnote link
Template:Code → [[Lion#Etymology|Etymology of lion]] → Template:Format hatnote link

Format pages

<source lang="lua"> mHatnote.formatPages(...) </source>

Formats a list of pages using the _formatLink function, and returns the result as an array. For example, the code Template:Code would produce an array like Template:Code.

Format page tables

<source lang="lua"> mHatnote.formatPageTables(...) </source>

Takes a list of page/display tables, formats them with the _formatLink function, and returns the result as an array. Each item in the list must be a table. The first value in the table is the link, and is required. The second value in the table is the display value, and is optional. For example, the code Template:Code would produce an array like Template:Code.

Find namespace id

<source lang="lua"> mHatnote.findNamespaceId(link, removeColon) </source>

Finds the namespace id of the string link, which should be a valid page name, with or without the section name. This function will not work if the page name is enclosed with square brackets. When trying to parse the namespace name, colons are removed from the start of the link by default. This is helpful if users have specified colons when they are not strictly necessary. If you do not need to check for initial colons, set removeColon to false.

Examples
Template:Code → 0
Template:Code → 14
Template:Code → 14
Template:Code → 0 (the namespace is detected as ":Category", rather than "Category")

Make wikitext error

<source lang="lua"> mHatnote.makeWikitextError(msg, helpLink, addTrackingCategory) </source>

Formats the string msg as a red wikitext error message, with optional link to a help page helpLink. Normally this function also adds Category:Hatnote templates with errors; however, if addTrackingCategory is not false after being passed through Module:Yesno, then the category is suppressed. This means that the category can be suppressed with addTrackingCategory values including "no", "n", 0, "false", and Template:Code.

Examples:

Template:CodeError: an error has occurred.
Template:CodeError: an error has occurred (help).

Examples

For examples of how this module is used in other Lua modules, see the following (listed in order of complexity):