wikimedia/mediawiki-core

<?php

namespace MediaWiki\ChangeTags\Hook;

use MediaWiki\Status\Status;
use MediaWiki\User\User;

/**
 * This is a hook handler interface, see docs/Hooks.md.
 * Use the hook name "ChangeTagCanDelete" to register handlers implementing this interface.
 *
 * @stable to implement
 * @ingroup Hooks
 */
interface ChangeTagCanDeleteHook {
    /**
     * Use this hook to tell whether a change tag should be able to be
     * deleted from the UI (Special:Tags) or via the API. The default is that tags
     * defined using the ListDefinedTags hook are not allowed to be deleted unless
     * specifically allowed. Ensure you consume the ChangeTagAfterDelete hook to carry
     * out custom deletion actions.
     *
     * @since 1.35
     *
     * @param string $tag Name of the tag
     * @param User|null $user User initiating the action
     * @param Status &$status To allow deletion of the tag, set `$status = Status::newGood()`,
     *   and then return false from the hook function.
     * @return bool|void True or no return value to continue or false to allow deletion of the tag
     */
    public function onChangeTagCanDelete( $tag, $user, &$status );
}