CentralAuthHandler.php
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CentralAuthHandler.php
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	<?php

	namespace MediaWiki\CheckUser\HookHandler;

	use MediaWiki\Extension\CentralAuth\Hooks\CentralAuthGlobalUserGroupMembershipChangedHook;
	use MediaWiki\Extension\CentralAuth\User\CentralAuthUser;
	use MediaWiki\SpecialPage\SpecialPageFactory;
	use Wikimedia\ObjectCache\WANObjectCache;

	class CentralAuthHandler implements CentralAuthGlobalUserGroupMembershipChangedHook {
	private WANObjectCache $wanCache;
	private SpecialPageFactory $specialPageFactory;

	public function __construct(
	WANObjectCache $wanCache,
	SpecialPageFactory $specialPageFactory
	) {
	$this->wanCache = $wanCache;
	$this->specialPageFactory = $specialPageFactory;
	}

	/**
	* Clear user's cached known external wiki permissions on global user group change
	*
	* @inheritDoc
	*/
	public function onCentralAuthGlobalUserGroupMembershipChanged(
	CentralAuthUser $centralAuthUser,
	array $oldGroups,
	array $newGroups
	) {
	// Do nothing if Special:GlobalContributions doesn't exist, as it's the sole generator of this data
	if ( !$this->specialPageFactory->exists( 'GlobalContributions' ) ) {
	return;
	}

	$checkKey = $this->wanCache->makeGlobalKey(
	'globalcontributions-ext-permissions',
	$centralAuthUser->getId()
	);

	// Clear the cache value if it exists as changing user groups may change the user's
	// stored access permissions
	$this->wanCache->touchCheckKey( $checkKey );
	}
	}