From 5e2316d05d954ec9cb9a3d284007c3d329550395 Mon Sep 17 00:00:00 2001
From: Roeland Jago Douma <rullzer@owncloud.com>
Date: Sun, 22 May 2016 20:44:06 +0200
Subject: [PATCH] Allow multibucket in objectstore

---
 .../Files/Mount/ObjectHomeMountProvider.php   | 57 ++++++++++++++++++-
 lib/private/Files/ObjectStore/Mapper.php      | 52 +++++++++++++++++
 2 files changed, 107 insertions(+), 2 deletions(-)
 create mode 100644 lib/private/Files/ObjectStore/Mapper.php

diff --git a/lib/private/Files/Mount/ObjectHomeMountProvider.php b/lib/private/Files/Mount/ObjectHomeMountProvider.php
index c910cf6bd45..aa6a443971f 100644
--- a/lib/private/Files/Mount/ObjectHomeMountProvider.php
+++ b/lib/private/Files/Mount/ObjectHomeMountProvider.php
@@ -52,9 +52,27 @@ class ObjectHomeMountProvider implements IHomeMountProvider {
 	 * @return \OCP\Files\Mount\IMountPoint[]
 	 */
 	public function getHomeMountForUser(IUser $user, IStorageFactory $loader) {
+
+		$config = $this->multiBucketObjectStore($user);
+		if ($config === null) {
+			$config = $this->singleBucketObjectStore($user);
+		}
+
+		if ($config === null) {
+			return null;
+		}
+
+		return new MountPoint('\OC\Files\ObjectStore\HomeObjectStoreStorage', '/' . $user->getUID(), $config['arguments'], $loader);
+	}
+
+	/**
+	 * @param IUser $user
+	 * @return array|null
+	 */
+	private function singleBucketObjectStore(IUser $user) {
 		$config = $this->config->getSystemValue('objectstore');
 		if (!is_array($config)) {
-			return null; //fall back to local home provider
+			return null;
 		}
 
 		// sanity checks
@@ -68,6 +86,41 @@ class ObjectHomeMountProvider implements IHomeMountProvider {
 		// instantiate object store implementation
 		$config['arguments']['objectstore'] = new $config['class']($config['arguments']);
 
-		return new MountPoint('\OC\Files\ObjectStore\HomeObjectStoreStorage', '/' . $user->getUID(), $config['arguments'], $loader);
+		return $config;
+	}
+
+	/**
+	 * @param IUser $user
+	 * @return array|null
+	 */
+	private function multiBucketObjectStore(IUser $user) {
+		$config = $this->config->getSystemValue('objectstore_multibucket');
+		if (!is_array($config)) {
+			return null;
+		}
+
+		// sanity checks
+		if (empty($config['class'])) {
+			\OCP\Util::writeLog('files', 'No class given for objectstore', \OCP\Util::ERROR);
+		}
+		if (!isset($config['arguments'])) {
+			$config['arguments'] = [];
+		}
+		$config['arguments']['user'] = $user;
+
+		/*
+		 * Use any provided bucket argument as prefix
+		 * and add the mapping from username => bucket
+		 */
+		if (!isset($config['arguments']['bucket'])) {
+			$config['arguments']['bucket'] = '';
+		}
+		$mapper = new \OC\Files\ObjectStore\Mapper($user);
+		$config['arguments']['bucket'] .= $mapper->getBucket();
+
+		// instantiate object store implementation
+		$config['arguments']['objectstore'] = new $config['class']($config['arguments']);
+
+		return $config;
 	}
 }
diff --git a/lib/private/Files/ObjectStore/Mapper.php b/lib/private/Files/ObjectStore/Mapper.php
new file mode 100644
index 00000000000..f0004f1f966
--- /dev/null
+++ b/lib/private/Files/ObjectStore/Mapper.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Files\ObjectStore;
+
+use OCP\IUser;
+
+/**
+ * Class Mapper
+ *
+ * @package OC\Files\ObjectStore
+ *
+ * Map a user to a bucket.
+ */
+class Mapper {
+	/** @var IUser */
+	private $user;
+
+	/**
+	 * Mapper constructor.
+	 *
+	 * @param IUser $user
+	 */
+	public function __construct(IUser $user) {
+		$this->user = $user;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getBucket() {
+		$hash = md5($this->user->getUID());
+		return substr($hash, 0, 3);
+	}
+}
\ No newline at end of file