Added searchByTags to view, storage and cache

apps/files_sharing/lib/cache.php

@@ -344,6 +344,46 @@ class Shared_Cache extends Cache {
 		return $result;
 	}
 
+	/**
+	 * search for files by tag
+	 *
+	 * @param string|int $tag tag to search for
+	 * @param string $userId owner of the tags
+	 * @return array file data
+	 */
+	public function searchByTag($tag, $userId = null) {
+		// TODO: inject this
+		$tagger = \OC::$server->getTagManager()->load('files', null, null, $userId);
+		$result = array();
+		$exploreDirs = array('');
+		// FIXME: this is so wrong and unefficient, need to replace with actual DB queries
+		while (count($exploreDirs) > 0) {
+			$dir = array_pop($exploreDirs);
+			$files = $this->getFolderContents($dir);
+			// no results?
+			if (!$files) {
+				// maybe it's a single shared file
+				$file = $this->get('');
+				$tags = $tagger->getTagsForObjects(array((int)$file['fileid']));
+				if (!empty($tags) && in_array($tag, current($tags))) {
+					$result[] = $file;
+				}
+				continue;
+			}
+			foreach ($files as $file) {
+				if ($file['mimetype'] === 'httpd/unix-directory') {
+					$exploreDirs[] = ltrim($dir . '/' . $file['name'], '/');
+				} else {
+					$tags = $tagger->getTagsForObjects(array((int)$file['fileid']));
+					if (!empty($tags) && in_array($tag, current($tags))) {
+						$result[] = $file;
+					}
+				}
+			}
+		}
+		return $result;
+	}
+
 	/**
 	 * get the size of a folder and set it in the cache
 	 *

apps/files_sharing/tests/cache.php

@@ -204,6 +204,39 @@ class Test_Files_Sharing_Cache extends TestCase {
 		$this->verifyFiles($check, $results);
 	}
 
+	/**
+	 * Test searching by tag
+	 */
+	function testSearchByTag() {
+		$id1 = $this->sharedCache->get('bar.txt')['fileid'];
+		$id2 = $this->sharedCache->get('subdir/another too.txt')['fileid'];
+		$id3 = $this->sharedCache->get('subdir/not a text file.xml')['fileid'];
+		$id4 = $this->sharedCache->get('subdir/another.txt')['fileid'];
+		$tagManager = \OC::$server->getTagManager()->load('files');
+		$tagManager->tagAs($id1, 'tag1');
+		$tagManager->tagAs($id1, 'tag2');
+		$tagManager->tagAs($id2, 'tag1');
+		$tagManager->tagAs($id3, 'tag1');
+		$tagManager->tagAs($id4, 'tag2');
+		$results = $this->sharedStorage->getCache()->searchByTag('tag1');
+		$check = array(
+				array(
+					'name' => 'bar.txt',
+					'path' => 'bar.txt'
+				),
+				array(
+					'name' => 'another too.txt',
+					'path' => 'subdir/another too.txt'
+				),
+				array(
+					'name' => 'not a text file.xml',
+					'path' => 'subdir/not a text file.xml'
+				),
+			);
+		$this->verifyFiles($check, $results);
+		$tagManager->delete(array('tag1', 'tag2'));
+	}
+
 	function testGetFolderContentsInRoot() {
 		$results = $this->user2View->getDirectoryContent('/');
 

lib/private/files/cache/cache.php

@@ -503,6 +503,54 @@ class Cache {
 		return $files;
 	}
 
+	/**
+	 * Search for files by tag of a given users.
+	 *
+	 * Note that every user can tag files differently.
+	 *
+	 * @param string|int $tag name or tag id
+	 * @param string $userId owner of the tags
+	 * @return array file data
+	 */
+	public function searchByTag($tag, $userId = null) {
+		if (is_null($userId)) {
+			$userId = \OC::$server->getUserSession()->getUser()->getUID(); 
+		}
+		$sql = 'SELECT `fileid`, `storage`, `path`, `parent`, `name`, ' .
+			'`mimetype`, `mimepart`, `size`, `mtime`, ' .
+			'`encrypted`, `unencrypted_size`, `etag`, `permissions` ' .
+			'FROM `*PREFIX*filecache` `file`, ' .
+			'`*PREFIX*vcategory_to_object` `tagmap`, ' .
+			'`*PREFIX*vcategory` `tag` ' .
+			// JOIN filecache to vcategory_to_object
+			'WHERE `file`.`fileid` = `tagmap`.`objid` '.
+			// JOIN vcategory_to_object to vcategory
+			'AND `tagmap`.`type` = `tag`.`type` ' .
+			'AND `tagmap`.`categoryid` = `tag`.`id` ' .
+			// conditions
+			'AND `file`.`storage` = ? '.
+			'AND `tag`.`type` = \'files\' ' .
+			'AND `tag`.`uid` = ? ';
+		if (is_int($tag)) {
+			$sql .= 'AND `tag`.`id` = ? ';
+		} else {
+			$sql .= 'AND `tag`.`category` = ? ';
+		}
+		$result = \OC_DB::executeAudited(
+			$sql,
+			array(
+				$this->getNumericStorageId(),
+				$userId,
+				$tag
+			)
+		);
+		$files = array();
+		while ($row = $result->fetchRow()) {
+			$files[] = $row;
+		}
+		return $files;
+	}
+
 	/**
 	 * update the folder size and the size of all parent folders
 	 *

lib/private/files/cache/wrapper/cachewrapper.php

@@ -180,6 +180,18 @@ class CacheWrapper extends Cache {
 		return array_map(array($this, 'formatCacheEntry'), $results);
 	}
 
+	/**
+	 * search for files by tag
+	 *
+	 * @param string|int $tag name or tag id
+	 * @param string $userId owner of the tags
+	 * @return array file data
+	 */
+	public function searchByTag($tag, $userId = null) {
+		$results = $this->cache->searchByTag($tag, $userId);
+		return array_map(array($this, 'formatCacheEntry'), $results);
+	}
+
 	/**
 	 * update the folder size and the size of all parent folders
 	 *

lib/private/files/filesystem.php

@@ -686,6 +686,14 @@ class Filesystem {
 		return self::$defaultInstance->searchByMime($query);
 	}
 
+	/**
+	 * @param string|int $tag name or tag id
+	 * @return FileInfo[] array or file info
+	 */
+	static public function searchByTag($tag) {
+		return self::$defaultInstance->searchByTag($tag);
+	}
+
 	/**
 	 * check if a file or folder has been updated since $time
 	 *

lib/private/files/node/folder.php

@@ -236,6 +236,16 @@ class Folder extends Node implements \OCP\Files\Folder {
 		return $this->searchCommon($mimetype, 'searchByMime');
 	}
 
+	/**
+	 * search for files by tag
+	 *
+	 * @param string $tag
+	 * @return Node[]
+	 */
+	public function searchByTag($tag) {
+		return $this->searchCommon($tag, 'searchByTag');
+	}
+
 	/**
 	 * @param string $query
 	 * @param string $method

lib/private/files/node/nonexistingfolder.php

@@ -99,6 +99,10 @@ class NonExistingFolder extends Folder {
 		throw new NotFoundException();
 	}
 
+	public function searchByTag($mime) {
+		throw new NotFoundException();
+	}
+
 	public function getById($id) {
 		throw new NotFoundException();
 	}

lib/private/files/view.php

@@ -1134,6 +1134,16 @@ class View {
 		return $this->searchCommon($mimetype, 'searchByMime');
 	}
 
+	/**
+	 * search for files by tag
+	 *
+	 * @param string|int $tag name or tag id
+	 * @return FileInfo[]
+	 */
+	public function searchByTag($tag) {
+		return $this->searchCommon($tag, 'searchByTag');
+	}
+
 	/**
 	 * @param string $query
 	 * @param string $method

lib/public/files/folder.php

@@ -116,6 +116,14 @@ interface Folder extends Node {
 	 */
 	public function searchByMime($mimetype);
 
+	/**
+	 * search for files by tag
+	 *
+	 * @param string|int $tag tag name or tag id
+	 * @return \OCP\Files\Node[]
+	 */
+	public function searchByTag($tag);
+
 	/**
 	 * get a file or folder inside the folder by it's internal id
 	 *

tests/lib/files/cache/cache.php

@@ -270,6 +270,63 @@ class Cache extends \Test\TestCase {
 		$this->assertEquals(2, count($this->cache->searchByMime('foo/file')));
 	}
 
+	function testSearchByTag() {
+		$userId = $this->getUniqueId('user');
+		\OC_User::createUser($userId, $userId);
+		$this->loginAsUser($userId);
+		$user = new \OC\User\User($userId, null);
+
+		$file1 = 'folder';
+		$file2 = 'folder/foobar';
+		$file3 = 'folder/foo';
+		$file4 = 'folder/foo2';
+		$file5 = 'folder/foo3';
+		$data1 = array('size' => 100, 'mtime' => 50, 'mimetype' => 'foo/folder');
+		$fileData = array();
+		$fileData['foobar'] = array('size' => 1000, 'mtime' => 20, 'mimetype' => 'foo/file');
+		$fileData['foo'] = array('size' => 20, 'mtime' => 25, 'mimetype' => 'foo/file');
+		$fileData['foo2'] = array('size' => 25, 'mtime' => 28, 'mimetype' => 'foo/file');
+		$fileData['foo3'] = array('size' => 88, 'mtime' => 34, 'mimetype' => 'foo/file');
+
+		$id1 = $this->cache->put($file1, $data1);
+		$id2 = $this->cache->put($file2, $fileData['foobar']);
+		$id3 = $this->cache->put($file3, $fileData['foo']);
+		$id4 = $this->cache->put($file4, $fileData['foo2']);
+		$id5 = $this->cache->put($file5, $fileData['foo3']);
+
+		$tagManager = \OC::$server->getTagManager()->load('files', null, null, $userId);
+		$this->assertTrue($tagManager->tagAs($id1, 'tag1'));
+		$this->assertTrue($tagManager->tagAs($id1, 'tag2'));
+		$this->assertTrue($tagManager->tagAs($id2, 'tag2'));
+		$this->assertTrue($tagManager->tagAs($id3, 'tag1'));
+		$this->assertTrue($tagManager->tagAs($id4, 'tag2'));
+
+		// use tag name
+		$results = $this->cache->searchByTag('tag1', $userId);
+
+		$this->assertEquals(2, count($results));
+
+		$this->assertEquals('folder', $results[0]['name']);
+		$this->assertEquals('foo', $results[1]['name']);
+
+		// use tag id
+		$tags = $tagManager->getTagsForUser($userId);
+		$this->assertNotEmpty($tags);
+		$tags = array_filter($tags, function($tag) { return $tag->getName() === 'tag2'; });
+		$results = $this->cache->searchByTag(current($tags)->getId(), $userId);
+		$this->assertEquals(3, count($results));
+
+		$this->assertEquals('folder', $results[0]['name']);
+		$this->assertEquals('foobar', $results[1]['name']);
+		$this->assertEquals('foo2', $results[2]['name']);
+
+		$tagManager->delete('tag1');
+		$tagManager->delete('tag2');
+
+		$this->logout();
+		\OC_User::deleteUser($userId);
+	}
+
 	function testMove() {
 		$file1 = 'folder';
 		$file2 = 'folder/bar';