1 files changed, 109 insertions, 0 deletions
diff --git a/www/wiki/includes/filerepo/ForeignDBViaLBRepo.php b/www/wiki/includes/filerepo/ForeignDBViaLBRepo.php
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+++ b/www/wiki/includes/filerepo/ForeignDBViaLBRepo.php
@@ -0,0 +1,109 @@
+<?php
+/**
+ * A foreign repository with a MediaWiki database accessible via the configured LBFactory.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup FileRepo
+ */
+
+/**
+ * A foreign repository with a MediaWiki database accessible via the configured LBFactory
+ *
+ * @ingroup FileRepo
+ */
+class ForeignDBViaLBRepo extends LocalRepo {
+	/** @var string */
+	protected $wiki;
+
+	/** @var string */
+	protected $dbName;
+
+	/** @var string */
+	protected $tablePrefix;
+
+	/** @var array */
+	protected $fileFactory = [ ForeignDBFile::class, 'newFromTitle' ];
+
+	/** @var array */
+	protected $fileFromRowFactory = [ ForeignDBFile::class, 'newFromRow' ];
+
+	/** @var bool */
+	protected $hasSharedCache;
+
+	/**
+	 * @param array|null $info
+	 */
+	function __construct( $info ) {
+		parent::__construct( $info );
+		$this->wiki = $info['wiki'];
+		list( $this->dbName, $this->tablePrefix ) = wfSplitWikiID( $this->wiki );
+		$this->hasSharedCache = $info['hasSharedCache'];
+	}
+
+	/**
+	 * @return IDatabase
+	 */
+	function getMasterDB() {
+		return wfGetLB( $this->wiki )->getConnectionRef( DB_MASTER, [], $this->wiki );
+	}
+
+	/**
+	 * @return IDatabase
+	 */
+	function getReplicaDB() {
+		return wfGetLB( $this->wiki )->getConnectionRef( DB_REPLICA, [], $this->wiki );
+	}
+
+	/**
+	 * @return Closure
+	 */
+	protected function getDBFactory() {
+		return function ( $index ) {
+			return wfGetLB( $this->wiki )->getConnectionRef( $index, [], $this->wiki );
+		};
+	}
+
+	function hasSharedCache() {
+		return $this->hasSharedCache;
+	}
+
+	/**
+	 * Get a key on the primary cache for this repository.
+	 * Returns false if the repository's cache is not accessible at this site.
+	 * The parameters are the parts of the key, as for wfMemcKey().
+	 * @return bool|string
+	 */
+	function getSharedCacheKey( /*...*/ ) {
+		if ( $this->hasSharedCache() ) {
+			$args = func_get_args();
+			array_unshift( $args, $this->wiki );
+
+			return implode( ':', $args );
+		} else {
+			return false;
+		}
+	}
+
+	protected function assertWritableRepo() {
+		throw new MWException( static::class . ': write operations are not supported.' );
+	}
+
+	public function getInfo() {
+		return FileRepo::getInfo();
+	}
+}