1 files changed, 156 insertions, 0 deletions
diff --git a/www/wiki/includes/filerepo/ForeignDBRepo.php b/www/wiki/includes/filerepo/ForeignDBRepo.php
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+++ b/www/wiki/includes/filerepo/ForeignDBRepo.php
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+<?php
+/**
+ * A foreign repository with an accessible MediaWiki database.
+ *
+ * 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
+ */
+
+use Wikimedia\Rdbms\Database;
+use Wikimedia\Rdbms\IDatabase;
+
+/**
+ * A foreign repository with an accessible MediaWiki database
+ *
+ * @ingroup FileRepo
+ */
+class ForeignDBRepo extends LocalRepo {
+	/** @var string */
+	protected $dbType;
+
+	/** @var string */
+	protected $dbServer;
+
+	/** @var string */
+	protected $dbUser;
+
+	/** @var string */
+	protected $dbPassword;
+
+	/** @var string */
+	protected $dbName;
+
+	/** @var string */
+	protected $dbFlags;
+
+	/** @var string */
+	protected $tablePrefix;
+
+	/** @var bool */
+	protected $hasSharedCache;
+
+	/** @var IDatabase */
+	protected $dbConn;
+
+	/** @var callable */
+	protected $fileFactory = [ ForeignDBFile::class, 'newFromTitle' ];
+	/** @var callable */
+	protected $fileFromRowFactory = [ ForeignDBFile::class, 'newFromRow' ];
+
+	/**
+	 * @param array|null $info
+	 */
+	function __construct( $info ) {
+		parent::__construct( $info );
+		$this->dbType = $info['dbType'];
+		$this->dbServer = $info['dbServer'];
+		$this->dbUser = $info['dbUser'];
+		$this->dbPassword = $info['dbPassword'];
+		$this->dbName = $info['dbName'];
+		$this->dbFlags = $info['dbFlags'];
+		$this->tablePrefix = $info['tablePrefix'];
+		$this->hasSharedCache = $info['hasSharedCache'];
+	}
+
+	/**
+	 * @return IDatabase
+	 */
+	function getMasterDB() {
+		if ( !isset( $this->dbConn ) ) {
+			$func = $this->getDBFactory();
+			$this->dbConn = $func( DB_MASTER );
+		}
+
+		return $this->dbConn;
+	}
+
+	/**
+	 * @return IDatabase
+	 */
+	function getReplicaDB() {
+		return $this->getMasterDB();
+	}
+
+	/**
+	 * @return Closure
+	 */
+	protected function getDBFactory() {
+		$type = $this->dbType;
+		$params = [
+			'host' => $this->dbServer,
+			'user' => $this->dbUser,
+			'password' => $this->dbPassword,
+			'dbname' => $this->dbName,
+			'flags' => $this->dbFlags,
+			'tablePrefix' => $this->tablePrefix,
+			'foreign' => true,
+		];
+
+		return function ( $index ) use ( $type, $params ) {
+			return Database::factory( $type, $params );
+		};
+	}
+
+	/**
+	 * @return bool
+	 */
+	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|mixed
+	 */
+	function getSharedCacheKey( /*...*/ ) {
+		if ( $this->hasSharedCache() ) {
+			$args = func_get_args();
+			array_unshift( $args, $this->dbName, $this->tablePrefix );
+
+			return call_user_func_array( 'wfForeignMemcKey', $args );
+		} else {
+			return false;
+		}
+	}
+
+	protected function assertWritableRepo() {
+		throw new MWException( static::class . ': write operations are not supported.' );
+	}
+
+	/**
+	 * Return information about the repository.
+	 *
+	 * @return array
+	 * @since 1.22
+	 */
+	function getInfo() {
+		return FileRepo::getInfo();
+	}
+}