fix for bug 879 - add parent directory to file cache if it does not exist yet.

For example this can happen if the sync client is used before the user created the root directory (e.g. through web login).

lib/filecache.php

@@ -59,7 +59,7 @@ class OC_FileCache{
 			$root='';
 		}
 		$path=$root.$path;
-		$query=OC_DB::prepare('SELECT `ctime`,`mtime`,`mimetype`,`size`,`encrypted`,`versioned`,`writable` FROM `*PREFIX*fscache` WHERE `path_hash`=?');
+		$query=OC_DB::prepare('SELECT ctime,mtime,mimetype,size,encrypted,versioned,writable FROM *PREFIX*fscache WHERE path_hash=?');
 		$result=$query->execute(array(md5($path)))->fetchRow();
 		if(is_array($result)){
 			return $result;
@@ -84,19 +84,28 @@ class OC_FileCache{
 		if($root=='/'){
 			$root='';
 		}
-		$path=$root.$path;
-		$parent=self::getParentId($path);
-		$id=self::getFileId($path);
-		if(isset(OC_FileCache::$savedData[$path])){
-			$data=array_merge(OC_FileCache::$savedData[$path],$data);
-			unset(OC_FileCache::$savedData[$path]);
+		$fullpath=$root.$path;
+		$parent=self::getParentId($fullpath);
+		$id=self::getFileId($fullpath);
+		if(isset(OC_FileCache::$savedData[$fullpath])){
+			$data=array_merge(OC_FileCache::$savedData[$fullpath],$data);
+			unset(OC_FileCache::$savedData[$fullpath]);
+		}
+		
+		// add parent directory to the file cache if it does not exist yet.
+		if ($parent == -1 && $fullpath != $root) {
+			$parentDir = substr(dirname($path), 0, strrpos(dirname($path), DIRECTORY_SEPARATOR));
+			self::scanFile($parentDir);
+			$parent = self::getParentId($fullpath);
 		}
+		
 		if($id!=-1){
 			self::update($id,$data);
 			return;
 		}
+		
 		if(!isset($data['size']) or !isset($data['mtime'])){//save incomplete data for the next time we write it
-			self::$savedData[$path]=$data;
+			self::$savedData[$fullpath]=$data;
 			return;
 		}
 		if(!isset($data['encrypted'])){
@@ -113,9 +122,9 @@ class OC_FileCache{
 		$data['versioned']=(int)$data['versioned'];
 		$user=OC_User::getUser();
 		$query=OC_DB::prepare('INSERT INTO `*PREFIX*fscache`(`parent`, `name`, `path`, `path_hash`, `size`, `mtime`, `ctime`, `mimetype`, `mimepart`,`user`,`writable`,`encrypted`,`versioned`) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?)');
-		$result=$query->execute(array($parent,basename($path),$path,md5($path),$data['size'],$data['mtime'],$data['ctime'],$data['mimetype'],$mimePart,$user,$data['writable'],$data['encrypted'],$data['versioned']));
+		$result=$query->execute(array($parent,basename($fullpath),$fullpath,md5($fullpath),$data['size'],$data['mtime'],$data['ctime'],$data['mimetype'],$mimePart,$user,$data['writable'],$data['encrypted'],$data['versioned']));
 		if(OC_DB::isError($result)){
-			OC_Log::write('files','error while writing file('.$path.') to cache',OC_Log::ERROR);
+			OC_Log::write('files','error while writing file('.$fullpath.') to cache',OC_Log::ERROR);
 		}
 	}
 
@@ -197,12 +206,12 @@ class OC_FileCache{
 			$path=$root.$file;
 			self::delete(self::getFileId($path));
 		}elseif($file!=-1){
-			$query=OC_DB::prepare('SELECT `id` FROM `*PREFIX*fscache` WHERE `parent`=?');
+			$query=OC_DB::prepare('SELECT id FROM *PREFIX*fscache WHERE parent=?');
 			$result=$query->execute(array($file));
 			while($child=$result->fetchRow()){
 				self::delete(intval($child['id']));
 			}
-			$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache` WHERE `id`=?');
+			$query=OC_DB::prepare('DELETE FROM *PREFIX*fscache WHERE id=?');
 			$query->execute(array($file));
 		}
 	}