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{{used in system|in [[MediaWiki:Wantedpages-summary]]}}

This is a meta-module that provides various functions for making hatnotes. It implements the {{tl|hatnote}} template, for use in disambiguation hatnotes at the top of pages, and the {{tl|rellink}} template, for use in making links to related articles directly under section headings. It also implements the {{tl|format hatnote link}} template, which is used to format a wikilink for use in hatnotes.

{{module rating|protected}}

{{Lua|Module:Yesno|Module:Arguments|Module:Format link}}

{{Uses TemplateStyles|Module:Hatnote/styles.css}}

This is a meta-module that provides various functions for making [[Wikipedia:Hatnote|hatnotes]]. It implements the {{tl|hatnote}} template, for use in disambiguation hatnotes at the top of pages, and the {{tl|rellink}} template, for use in making links to related articles directly under section headings. It also implementscontains thea {{tl|formatnumber hatnoteof link}}helper template,functions whichfor isuse usedin toother formatLua ahatnote wikilink for use in hatnotesmodules.

== 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]], [[Template:Rellink]] and [[Template:Format hatnote link]] for documentation.

== Use from other Lua modules ==

Line 9 ⟶ 13:

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

<sourcesyntaxhighlight lang="lua">

local mHatnote = require('Module:Hatnote')

</syntaxhighlight>

</source>

You can then use the functions as documented below.

Line 17 ⟶ 21:

=== Hatnote ===

<sourcesyntaxhighlight lang="lua">

mHatnote._hatnote(s, options)

</syntaxhighlight>

</source>

Formats the string <var>s</var> as a hatnote. This encloses <var>s</var> in the tags {{tag|div|params=class="dablinkhatnote"}}. TheOptions CSSare ofprovided in the dablink<var>options</var> classtable. isOptions defined in [[MediaWikiinclude:Common.css]].

* <var>options.extraclasses</var> - a string of extra classes to provide

* <var>options.selfref</var> - 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 [[Module:Hatnote/styles.css]].

; Example 1

<sourcesyntaxhighlight lang="lua">

mHatnote._hatnote('This is a hatnote.')

</syntaxhighlight>

</source>

Produces:

{{tag|div|content=This is a hatnote.|params=class="dablinkhatnote"}}

Displays as:

{{hatnote|This is a hatnote.}}

; Example 2

=== Rellink ===

<sourcesyntaxhighlight lang="lua">

mHatnote._rellink_hatnote(s'This is a hatnote.', {extraclasses = 'boilerplate seealso', selfref = true})

</syntaxhighlight>

</source>

Produces:

Formats the string <var>s</var> as a "related articles" link. This encloses <var>s</var> in the tags {{tag|div|params=class="rellink"}}. The CSS of the dablink class is defined in [[MediaWiki:Common.css]]. Extra classes can be added as the string <var>extraclasses</var>.

{{tag|div|content=This is a related article linkhatnote.|params=class="rellinkhatnote boilerplate seealso selfref"}}

Displayed as:

; Example 1

{{rellinkhatnote|This is a related article linkhatnote.|extraclasses=boilerplate seealso|selfref=true}}

=== Find namespace id ===

<source lang="lua">

mHatnote._rellink('This is a related article link.')

</source>

<sourcesyntaxhighlight lang="lua">

Produces:

mHatnote.findNamespaceId(link, removeColon)

{{tag|div|content=This is a related article link.|params=class="rellink"}}

</syntaxhighlight>

Finds the [[WP:NS|namespace id]] of the string <var>link</var>, 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 <var>removeColon</var> to false.

Displays as:

{{rellink|This is a related article link.}}

;Examples:

; Example 2

: {{code|mHatnote.findNamespaceId('Lion')|lua}} &rarr; 0

: {{code|mHatnote.findNamespaceId('Category:Lions')|lua}} &rarr; 14

: {{code|mHatnote.findNamespaceId(':Category:Lions')|lua}} &rarr; 14

: {{code|mHatnote.findNamespaceId(':Category:Lions', false)|lua}} &rarr; 0 (the namespace is detected as ":Category", rather than "Category")

=== Make wikitext error ===

<source lang="lua">

mHatnote._rellink('This is a related article link.', 'boilerplate seealso')

</source>

<sourcesyntaxhighlight lang="lua">

Produces:

mHatnote.makeWikitextError(msg, helpLink, addTrackingCategory)

{{tag|div|content=This is a related article link.|params=class="rellink boilerplate seealso"}}

</syntaxhighlight>

Formats the string <var>msg</var> as a red wikitext error message, with optional link to a help page <var>helpLink</var>. Normally this function also adds {{clc|Hatnote templates with errors}}. To suppress categorization, pass <code>false</code> as third parameter of the function (<code>addTrackingCategory</code>).

Displayed as:

{{rellink|This is a related article link.|extraclasses=boilerplate seealso}}

Examples:

=== Format link ===

:{{code|mHatnote.makeWikitextError('an error has occurred')|lua}} &rarr; <strong class="error">Error: an error has occurred.</strong>

:{{code|mHatnote.makeWikitextError('an error has occurred', 'Template:Example#Errors')|lua}} &rarr; <strong class="error">Error: an error has occurred ([[Template:Example#Errors|help]]).</strong>

== Examples ==

<source lang="lua">

mHatnote._formatLink(link, display)

</source>

Formats <var>link</var> as a wikilink for display in hatnote templates, with optional display value <var>display</var>. Categories and files are automatically escaped with the [[Help:Colon trick|colon trick]], and links to sections are automatically formatted as ''page § section'', rather than the MediaWiki default of ''page#section''.

;Examples:

: {{code|mHatnote._formatLink('Lion')|lua}} &rarr; <nowiki>[[Lion]]</nowiki> &rarr; {{format hatnote link|Lion}}

: {{code|mHatnote._formatLink('Lion#Etymology')|lua}} &rarr; <nowiki>[[Lion#Etymology|Lion § Etymology]]</nowiki> &rarr; {{format hatnote link|Lion#Etymology}}

: {{code|mHatnote._formatLink('Category:Lions')|lua}} &rarr; <nowiki>[[:Category:Lions]]</nowiki> &rarr; {{format hatnote link|Category:Lions}}

: {{code|mHatnote._formatLink('Lion#Etymology', 'Etymology of lion')|lua}} &rarr; <nowiki>[[Lion#Etymology|Etymology of lion]]</nowiki> &rarr; {{format hatnote link|Lion#Etymology|Etymology of lion}}

For an example of how this module is used in other Lua modules, see [[Module:Labelled list hatnote]]

<includeonly>{{#ifeq:{{SUBPAGENAME}}|sandbox||

<includeonly>{{Sandbox other||

<!-- Categories go here and interwikis go in Wikidata. -->

[[Category:Hatnote modules| ]]

[[Category:Modules that add a tracking category]]

}}</includeonly><noinclude>

[[Category:Module documentation pages]]

</noinclude>