add upgrade path from old cache to preserve file id's

apps/files/appinfo/app.php

@@ -1,8 +1,18 @@
 <?php
-$l=OC_L10N::get('files');
+$l = OC_L10N::get('files');
 
 OCP\App::registerAdmin('files', 'admin');
 
-OCP\App::addNavigationEntry( array( "id" => "files_index", "order" => 0, "href" => OCP\Util::linkTo( "files", "index.php" ), "icon" => OCP\Util::imagePath( "core", "places/home.svg" ), "name" => $l->t("Files") ));
+OCP\App::addNavigationEntry(array("id" => "files_index", "order" => 0, "href" => OCP\Util::linkTo("files", "index.php"), "icon" => OCP\Util::imagePath("core", "places/home.svg"), "name" => $l->t("Files")));
 
 OC_Search::registerProvider('OC_Search_Provider_File');
+
+if (OC_User::isLoggedIn()) {
+	// update OC4.5 filecache to OC5 filecache, can't do this in update.php since it needs to happen for each user individually
+	$cacheVersion = (int)OCP\Config::getUserValue(OC_User::getUser(), 'files', 'cache_version', 4);
+	if ($cacheVersion < 5) {
+		\OC_Log::write('files', 'updating filecache to 5.0 for user ' . OC_User::getUser(), \OC_Log::INFO);
+		\OC\Files\Cache\Upgrade::upgrade();
+		OCP\Config::setUserValue(OC_User::getUser(), 'files', 'cache_version', 5);
+	}
+}

apps/files/appinfo/version

@@ -1 +1 @@
-1.1.6
+1.1.7

lib/files/cache/upgrade.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Copyright (c) 2012 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\Cache;
+
+class Upgrade {
+	static $permissionsCaches = array();
+
+	static function upgrade() {
+		$insertQuery = \OC_DB::prepare('INSERT INTO `*PREFIX*filecache`( `fileid`, `storage`, `path`, `path_hash`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted` )
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)');
+
+		$oldEntriesQuery = \OC_DB::prepare('SELECT * FROM `*PREFIX*fscache` ORDER BY `id` ASC'); //sort ascending to ensure the parent gets inserted before a child
+		$oldEntriesResult = $oldEntriesQuery->execute();
+
+		while ($row = $oldEntriesResult->fetchRow()) {
+			list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($row['path']);
+			/**
+			 * @var \OC\Files\Storage\Storage $storage
+			 * @var string $internalPath;
+			 */
+			$pathHash = md5($internalPath);
+			$storageId = $storage->getId();
+			$parentId = ($internalPath === '') ? -1 : $row['parent'];
+
+			$insertQuery->execute(array($row['id'], $storageId, $internalPath, $pathHash, $parentId, $row['name'], $row['mimetype'], $row['mimepart'], $row['size'], $row['mtime'], $row['encrypted']));
+
+			$permissions = ($row['writable']) ? \OCP\PERMISSION_ALL : \OCP\PERMISSION_READ;
+			$permissionsCache = self::getPermissionsCache($storage);
+			$permissionsCache->set($row['id'], $row['user'], $permissions);
+		}
+	}
+
+	/**
+	 * @param \OC\Files\Storage\Storage $storage
+	 * @return Permissions
+	 */
+	static function getPermissionsCache($storage) {
+		$storageId = $storage->getId();
+		if (!isset(self::$permissionsCaches[$storageId])) {
+			self::$permissionsCaches[$storageId] = $storage->getPermissionsCache();
+		}
+		return self::$permissionsCaches[$storageId];
+	}
+}