Added favorites feature to the files app

1 files changed, 94 insertions, 0 deletions

diff --git a/apps/files/service/tagservice.php b/apps/files/service/tagservice.php
new file mode 100644
index 00000000000..86885e38ddd
--- /dev/null
+++ b/apps/files/service/tagservice.php
@@ -0,0 +1,94 @@
+<?php
+/**
+ * Copyright (c) 2014 Vincent Petry <pvince81@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCA\Files\Service;
+
+/**
+ * Service class to manage tags on files.
+ */
+class TagService {
+
+	/**
+	 * @var \OCP\IUserSession
+	 */
+	private $userSession;
+
+	/**
+	 * @var \OCP\ITags
+	 */
+	private $tagger;
+
+	/**
+	 * @var \OCP\Files\Folder
+	 */
+	private $homeFolder;
+
+	public function __construct(
+		\OCP\IUserSession $userSession,
+		\OCP\ITags $tagger,
+		\OCP\Files\Folder $homeFolder
+	) {
+		$this->userSession = $userSession;
+		$this->tagger = $tagger;
+		$this->homeFolder = $homeFolder;
+	}
+
+	/**
+	 * Updates the tags of the specified file path.
+	 * The passed tags are absolute, which means they will
+	 * replace the actual tag selection.
+	 *
+	 * @param string $path path
+	 * @param array  $tags array of tags
+	 * @return array list of tags
+	 * @throws \OCP\NotFoundException if the file does not exist
+	 */
+	public function updateFileTags($path, $tags) {
+		$fileId = $this->homeFolder->get($path)->getId();
+
+		$currentTags = $this->tagger->getTagsForObjects(array($fileId));
+
+		if (!empty($currentTags)) {
+			$currentTags = current($currentTags);
+		}
+
+		$newTags = array_diff($tags, $currentTags);
+		foreach ($newTags as $tag) {
+			$this->tagger->tagAs($fileId, $tag);
+		}
+		$deletedTags = array_diff($currentTags, $tags);
+		foreach ($deletedTags as $tag) {
+			$this->tagger->unTag($fileId, $tag);
+		}
+
+		// TODO: re-read from tagger to make sure the
+		// list is up to date, in case of concurrent changes ?
+		return $tags;
+	}
+
+	/**
+	 * Updates the tags of the specified file path.
+	 * The passed tags are absolute, which means they will
+	 * replace the actual tag selection.
+	 *
+	 * @param array $tagName tag name to filter by
+	 * @return FileInfo[] list of matching files
+	 * @throws \Exception if the tag does not exist
+	 */
+	public function getFilesByTag($tagName) {
+		$nodes = $this->homeFolder->searchByTag(
+			$tagName, $this->userSession->getUser()->getUId()
+		);
+		foreach ($nodes as &$node) {
+			$node = $node->getFileInfo();
+		}
+
+		return $nodes;
+	}
+}
+