Extension:AControlImageLink

**MediaWiki extensions manual**
AControlImageLink; Release status: beta
Implementation	Hook
Description	Can prevent inclusion of thumbnails on non-allowed pages
Author(s)	Edward Chernenko
Latest version	0.0.1
Compatibility policy	Snapshots releases along with MediaWiki. Master is not backward compatible.
MediaWiki	1.34+
Database changes	No
License	GNU General Public License 2.0 or later
Download	Download extension ; Git [?]: Browse repository (GitHub); Gerrit code review; Git commit log; Download source tarball;
	Parameters $wgAControlImageLinkRestrictedExtensions;
	Hooks used ImageBeforeProduceHTML;
	Translate the AControlImageLink extension if it is available at translatewiki.net

With the AControlImageLink extension, you can configure some uploaded image to be includable (via [[File:Name.png|thumb]]) only into the pages where you allow this image to be.

Possible uses:

the image contains spoilers for the movie, and you want to show it only on pages that are marked as "Can contain spoilers" (and have Disclaimers/Warnings). If so, you can allow this image to be included only into these whitelisted pages.
The image is a dick pic, and while potentially useful in medical articles, might not be especially appropriate in other contexts.
in conjunction with Extension:AccessControl - for some permission tweaks.

How this works:

If File:Something.pdf has <accesscontrol>HasSpoilers</accesscontrol>, then articles without this exactly the same accesscontrol tag won't render [[File:Something.pdf]] syntax. (a link to image description page is shown instead of thumbnail)
Files without accesscontrol tag are not restricted.
Only files with extensions listed in $wgAControlImageLinkRestrictedExtensions array (default: empty) are restricted.

Sample configuration

wfLoadExtension( 'AControlImageLink' ); $wgAControlImageLinkRestrictedExtensions = [ 'pdf' ];

Installation

Download and move the extracted AControlImageLink folder to your extensions/ directory.
Developers and code contributors should install the extension from Git instead, using:
```
cd extensions/ git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/AControlImageLink 
```
Add the following code at the bottom of your LocalSettings.php file:
```
wfLoadExtension( 'AControlImageLink' ); 
```
Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.