add Cache::getFolderContent

lib/files/cache/cache.php

@@ -44,6 +44,25 @@ class Cache {
 		return $data;
 	}
 
+	/**
+	 * get the metadata of all files stored in $folder
+	 *
+	 * @param \OC\Files\File $folder
+	 * @return array
+	 */
+	static public function getFolderContents($folder) {
+		$fileId = self::getId($folder);
+		if ($fileId > -1) {
+			$query = \OC_DB::prepare(
+				'SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`
+			 	 FROM `*PREFIX*filecache` WHERE parent = ?');
+			$result = $query->execute(array($fileId));
+			return $result->fetchAll();
+		} else {
+			return array();
+		}
+	}
+
 	/**
 	 * store meta data for a file or folder
 	 *

tests/lib/files/cache/cache.php

@@ -78,6 +78,29 @@ class Cache extends \UnitTestCase {
 		$this->assertEqual(array('size' => 12, 'mtime' => 15), FileCache::get($file1));
 	}
 
+	public function testFolder() {
+		$file1 = $this->createPath('folder');
+		$file2 = $this->createPath('folder/bar');
+		$file3 = $this->createPath('folder/foo');
+		$data1 = array('size' => 100, 'mtime' => 50, 'mimetype' => 'foo/folder');
+		$fileData = array();
+		$fileData['bar'] = array('size' => 1000, 'mtime' => 20, 'mimetype' => 'foo/file');
+		$fileData['foo'] = array('size' => 20, 'mtime' => 25, 'mimetype' => 'foo/file');
+
+		FileCache::put($file1, $data1);
+		FileCache::put($file2, $fileData['bar']);
+		FileCache::put($file3, $fileData['foo']);
+
+		$content = FileCache::getFolderContents($file1);
+		$this->assertEqual(count($content), 2);
+		foreach ($content as $cachedData) {
+			$data = $fileData[$cachedData['name']];
+			foreach ($data as $name => $value) {
+				$this->assertEqual($value, $cachedData[$name]);
+			}
+		}
+	}
+
 	public function tearDown() {
 		FileCache::removeStorage($this->storage);
 	}