add quota storage wrapper

1 files changed, 104 insertions, 0 deletions

diff --git a/lib/files/storage/wrapper/quota.php b/lib/files/storage/wrapper/quota.php
new file mode 100644
index 00000000000..bc2d8939760
--- /dev/null
+++ b/lib/files/storage/wrapper/quota.php
@@ -0,0 +1,104 @@
+<?php
+/**
+ * Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Files\Storage\Wrapper;
+
+class Quota extends Wrapper {
+
+	/**
+	 * @var int $quota
+	 */
+	protected $quota;
+
+	/**
+	 * @param array $parameters
+	 */
+	public function __construct($parameters) {
+		$this->storage = $parameters['storage'];
+		$this->quota = $parameters['quota'];
+	}
+
+	protected function getSize($path) {
+		$cache = $this->getCache();
+		$data = $cache->get($path);
+		if (is_array($data) and isset($data['size'])) {
+			return $data['size'];
+		} else {
+			return \OC\Files\SPACE_NOT_COMPUTED;
+		}
+	}
+
+	/**
+	 * Get free space as limited by the quota
+	 *
+	 * @param string $path
+	 * @return int
+	 */
+	public function free_space($path) {
+		if ($this->quota < 0) {
+			return $this->storage->free_space($path);
+		} else {
+			$used = $this->getSize('');
+			if ($used < 0) {
+				return \OC\Files\SPACE_NOT_COMPUTED;
+			} else {
+				$free = $this->storage->free_space($path);
+				return min($free, ($this->quota - $used));
+			}
+		}
+	}
+
+	/**
+	 * see http://php.net/manual/en/function.file_put_contents.php
+	 *
+	 * @param string $path
+	 * @param string $data
+	 * @return bool
+	 */
+	public function file_put_contents($path, $data) {
+		$free = $this->free_space('');
+		if ($free < 0 or strlen($data) < $free) {
+			return $this->storage->file_put_contents($path, $data);
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * see http://php.net/manual/en/function.copy.php
+	 *
+	 * @param string $source
+	 * @param string $target
+	 * @return bool
+	 */
+	public function copy($source, $target) {
+		$free = $this->free_space('');
+		if ($free < 0 or $this->getSize($source) < $free) {
+			return $this->storage->copy($source, $target);
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * see http://php.net/manual/en/function.fopen.php
+	 *
+	 * @param string $path
+	 * @param string $mode
+	 * @return resource
+	 */
+	public function fopen($path, $mode) {
+		$source = $this->storage->fopen($path, $mode);
+		$free = $this->free_space('');
+		if ($free >= 0) {
+			return \OC\Files\Stream\Quota::wrap($source, $free);
+		} else {
+			return $source;
+		}
+	}
+}