Modul:Redirect/Dokumentation

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{{lua|Arguments}}

This module contains functions to find the target of a [[wikipedia:Help:Redirect|redirect]] page.

== Main ==

The main function accepts the name of a single page.  It determines if the page is a redirect; if so it looks up the page, extracts the target, and returns the target name as text. Its usage is <code><nowiki>{{#invoke:redirect|main|redirect-page-name}}</nowiki></code>.

The template normally neither takes nor gives square brackets, so to show the result as a link use <nowiki>[[{{#invoke:redirect|main|redirect-page-name}}]]</nowiki>.  An error is produced if the redirect does not exist, but for versatility no error is given if the file is not a redirect (returns the original text) or if the file name is blank (returns blank).

However, if the parameter ''bracket'' is given a nonblank value, brackets will be passed on if present.

=== Examples ===

* <code><nowiki>{{#invoke:redirect|main|Sand Block/de}}</nowiki></code> &rarr; {{#invoke:redirect|main|Sand Block/de}}
* <code><nowiki>{{#invoke:redirect|main|[[Door/de]]|bracket=yes}}</nowiki></code> &rarr; {{#invoke:redirect|main|[[Door/de]]|bracket=yes}}
* <code><nowiki>{{#invoke:redirect|main|Terraria Wiki}}</nowiki></code> &rarr; {{#invoke:redirect|main|Terraria Wiki}}

Note: [[Sand Block/de]] and [[Door/de]] are both redirects, but [[Terraria Wiki]] is not.

=== LuaMain ===

If you want to use the main function from another Lua module, you may want to use the luaMain function. This provides the same functionality as the main function, but doesn't require that a frame object be available.

To use this, first load the module.

<source lang="lua">
local mRedirect = require('Module:Redirect')
</source>

Then use the function with the following syntax: 

<source lang="lua">
mRedirect.luaMain(rname, bracket)
</source>

<var>rname</var> is the name of the redirect page, and if <var>bracket</var> is anything but false or nil, the module will produce a link rather than just a page name.

== IsRedirect ==

The isRedirect function is used from wiki pages to find out if a given page is a redirect or not. If the page is a redirect, the function returns "yes", and if not the output is blank. Its usage is <code><nowiki>{{#invoke:redirect|isRedirect|redirect-page-name}}</nowiki></code>.

=== Examples ===

* <code><nowiki>{{#invoke:redirect|isRedirect|Door/de}}</nowiki></code> &rarr; {{#invoke:redirect|isRedirect|Door/de}}
* <code><nowiki>{{#invoke:redirect|isRedirect|Terraria Wiki}}</nowiki></code> &rarr; {{#invoke:redirect|isRedirect|Terraria Wiki}}

=== LuaIsRedirect ===
The isRedirect can be accessed from other Lua modules in the same way as the main function:

<source lang="lua">
local mRedirect = require('Module:Redirect')
mRedirect.luaIsRedirect(rname)
</source>

== GetTarget ==

The getTarget function fetches the target page name of a redirect page, and is only usable from Lua. If the page specified is a redirect, then the target is returned; otherwise the function returns nil.

To use it, first load the module.

<source lang="lua">
local mRedirect = require('Module:Redirect')
</source>

Then use the function with the following syntax: 

<source lang="lua">
mRedirect.getTarget(page)
</source>

<var>page</var> can be either the name of the redirect page as a string, or a [[mw:Extension:Scribunto/Lua reference manual#Title objects|mw.title object]].