Add a single public api for resolving a cloud id to a user and remote and back

Signed-off-by: Robin Appelman <robin@icewind.nl>

2 files changed, 182 insertions, 0 deletions

diff --git a/lib/private/Federation/CloudId.php b/lib/private/Federation/CloudId.php
new file mode 100644
index 00000000000..746bd2eaf71
--- /dev/null
+++ b/lib/private/Federation/CloudId.php
@@ -0,0 +1,74 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017, Robin Appelman <robin@icewind.nl>
+ *
+ * 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\Federation;
+
+use OCP\Federation\ICloudId;
+
+class CloudId implements ICloudId {
+	/** @var string */
+	private $id;
+	/** @var string */
+	private $user;
+	/** @var string */
+	private $remote;
+
+	/**
+	 * CloudId constructor.
+	 *
+	 * @param string $id
+	 * @param string $user
+	 * @param string $remote
+	 */
+	public function __construct($id, $user, $remote) {
+		$this->id = $id;
+		$this->user = $user;
+		$this->remote = $remote;
+	}
+
+	/**
+	 * The full remote cloud id
+	 *
+	 * @return string
+	 */
+	public function getId() {
+		return $this->id;
+	}
+
+	public function getDisplayId() {
+		return str_replace('https://', '', str_replace('http://', '', $this->getId()));
+	}
+
+	/**
+	 * The username on the remote server
+	 *
+	 * @return string
+	 */
+	public function getUser() {
+		return $this->user;
+	}
+
+	/**
+	 * The base address of the remote server
+	 *
+	 * @return string
+	 */
+	public function getRemote() {
+		return $this->remote;
+	}
+}
\ No newline at end of file
diff --git a/lib/private/Federation/CloudIdManager.php b/lib/private/Federation/CloudIdManager.php
new file mode 100644
index 00000000000..d5d4e7f34cc
--- /dev/null
+++ b/lib/private/Federation/CloudIdManager.php
@@ -0,0 +1,108 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017, Robin Appelman <robin@icewind.nl>
+ *
+ * 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\Federation;
+
+use OCP\Federation\ICloudId;
+use OCP\Federation\ICloudIdManager;
+
+class CloudIdManager implements ICloudIdManager {
+	/**
+	 * @param string $cloudId
+	 * @return ICloudId
+	 */
+	public function resolveCloudId($cloudId) {
+		// TODO magic here to get the url and user instead of just splitting on @
+
+		if (!$this->isValidCloudId($cloudId)) {
+			throw new \InvalidArgumentException('Invalid cloud id');
+		}
+
+		// Find the first character that is not allowed in user names
+		$id = str_replace('\\', '/', $cloudId);
+		$posSlash = strpos($id, '/');
+		$posColon = strpos($id, ':');
+
+		if ($posSlash === false && $posColon === false) {
+			$invalidPos = strlen($id);
+		} else if ($posSlash === false) {
+			$invalidPos = $posColon;
+		} else if ($posColon === false) {
+			$invalidPos = $posSlash;
+		} else {
+			$invalidPos = min($posSlash, $posColon);
+		}
+
+		// Find the last @ before $invalidPos
+		$pos = $lastAtPos = 0;
+		while ($lastAtPos !== false && $lastAtPos <= $invalidPos) {
+			$pos = $lastAtPos;
+			$lastAtPos = strpos($id, '@', $pos + 1);
+		}
+
+		if ($pos !== false) {
+			$user = substr($id, 0, $pos);
+			$remote = substr($id, $pos + 1);
+			$remote = $this->fixRemoteURL($remote);
+			if (!empty($user) && !empty($remote)) {
+				return new CloudId($cloudId, $user, $remote);
+			}
+		}
+		throw new \InvalidArgumentException('Invalid cloud id');
+	}
+
+	/**
+	 * @param string $user
+	 * @param string $remote
+	 * @return CloudId
+	 */
+	public function getCloudId($user, $remote) {
+		// TODO check what the correct url is for remote (asking the remote)
+		return new CloudId($user. '@' . $remote, $user, $remote);
+	}
+
+	/**
+	 * Strips away a potential file names and trailing slashes:
+	 * - http://localhost
+	 * - http://localhost/
+	 * - http://localhost/index.php
+	 * - http://localhost/index.php/s/{shareToken}
+	 *
+	 * all return: http://localhost
+	 *
+	 * @param string $remote
+	 * @return string
+	 */
+	protected function fixRemoteURL($remote) {
+		$remote = str_replace('\\', '/', $remote);
+		if ($fileNamePosition = strpos($remote, '/index.php')) {
+			$remote = substr($remote, 0, $fileNamePosition);
+		}
+		$remote = rtrim($remote, '/');
+
+		return $remote;
+	}
+
+	/**
+	 * @param string $cloudId
+	 * @return bool
+	 */
+	public function isValidCloudId($cloudId) {
+		return strpos($cloudId, '@') !== false;
+	}
+}
\ No newline at end of file