1 files changed, 270 insertions, 0 deletions
diff --git a/lib/files/storage/common.php b/lib/files/storage/common.php
new file mode 100644
index 00000000000..0a60ff757eb
--- /dev/null
+++ b/lib/files/storage/common.php
@@ -0,0 +1,270 @@
+<?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\Storage;
+
+/**
+ * Storage backend class for providing common filesystem operation methods
+ * which are not storage-backend specific.
+ *
+ * \OC\Files\Storage\Common is never used directly; it is extended by all other
+ * storage backends, where its methods may be overridden, and additional
+ * (backend-specific) methods are defined.
+ *
+ * Some \OC\Files\Storage\Common methods call functions which are first defined
+ * in classes which extend it, e.g. $this->stat() .
+ */
+
+abstract class Common extends \OC\Files\Storage\Storage {
+
+	public function __construct($parameters) {}
+// 	abstract public function mkdir($path);
+// 	abstract public function rmdir($path);
+// 	abstract public function opendir($path);
+	public function is_dir($path) {
+		return $this->filetype($path)=='dir';
+	}
+	public function is_file($path) {
+		return $this->filetype($path)=='file';
+	}
+// 	abstract public function stat($path);
+// 	abstract public function filetype($path);
+	public function filesize($path) {
+		if($this->is_dir($path)) {
+			return 0;//by definition
+		}else{
+			$stat = $this->stat($path);
+			return $stat['size'];
+		}
+	}
+	public function isCreatable($path) {
+		return $this->isUpdatable($path);
+	}
+// 	abstract public function isReadable($path);
+// 	abstract public function isUpdatable($path);
+	public function isDeletable($path) {
+		return $this->isUpdatable($path);
+	}
+	public function isSharable($path) {
+		return $this->isReadable($path);
+	}
+// 	abstract public function file_exists($path);
+	public function filectime($path) {
+		$stat = $this->stat($path);
+		return $stat['ctime'];
+	}
+	public function filemtime($path) {
+		$stat = $this->stat($path);
+		return $stat['mtime'];
+	}
+	public function fileatime($path) {
+		$stat = $this->stat($path);
+		return $stat['atime'];
+	}
+	public function file_get_contents($path) {
+		$handle = $this->fopen($path, "r");
+		if(!$handle) {
+			return false;
+		}
+		$size=$this->filesize($path);
+		if($size==0) {
+			return '';
+		}
+		return fread($handle, $size);
+	}
+	public function file_put_contents($path,$data) {
+		$handle = $this->fopen($path, "w");
+		return fwrite($handle, $data);
+	}
+// 	abstract public function unlink($path);
+	public function rename($path1,$path2) {
+		if($this->copy($path1,$path2)) {
+			return $this->unlink($path1);
+		}else{
+			return false;
+		}
+	}
+	public function copy($path1,$path2) {
+		$source=$this->fopen($path1,'r');
+		$target=$this->fopen($path2,'w');
+		$count=\OC_Helper::streamCopy($source,$target);
+		return $count>0;
+	}
+// 	abstract public function fopen($path,$mode);
+
+	/**
+	 * @brief Deletes all files and folders recursively within a directory
+	 * @param $directory The directory whose contents will be deleted
+	 * @param $empty Flag indicating whether directory will be emptied
+	 * @returns true/false
+	 *
+	 * @note By default the directory specified by $directory will be
+	 * deleted together with its contents. To avoid this set $empty to true
+	 */
+	public function deleteAll( $directory, $empty = false ) {
+
+		// strip leading slash
+		if( substr( $directory, 0, 1 ) == "/" ) {
+
+			$directory = substr( $directory, 1 );
+
+		}
+
+		// strip trailing slash
+		if( substr( $directory, -1) == "/" ) {
+
+			$directory = substr( $directory, 0, -1 );
+
+		}
+
+		if ( !$this->file_exists( \OCP\USER::getUser() . '/' . $directory ) || !$this->is_dir( \OCP\USER::getUser() . '/' . $directory ) ) {
+
+			return false;
+
+		} elseif( !$this->is_readable( \OCP\USER::getUser() . '/' . $directory ) ) {
+
+			return false;
+
+		} else {
+
+			$directoryHandle = $this->opendir( \OCP\USER::getUser() . '/' . $directory );
+
+			while ( $contents = readdir( $directoryHandle ) ) {
+
+				if ( $contents != '.' && $contents != '..') {
+
+					$path = $directory . "/" . $contents;
+
+					if ( $this->is_dir( $path ) ) {
+
+						deleteAll( $path );
+
+					} else {
+
+						$this->unlink( \OCP\USER::getUser() .'/' . $path ); // TODO: make unlink use same system path as is_dir
+
+					}
+				}
+
+			}
+
+			//$this->closedir( $directoryHandle ); // TODO: implement closedir in OC_FSV
+
+			if ( $empty == false ) {
+
+				if ( !$this->rmdir( $directory ) ) {
+
+					return false;
+
+				}
+
+			}
+
+			return true;
+		}
+
+	}
+	public function getMimeType($path) {
+		if(!$this->file_exists($path)) {
+			return false;
+		}
+		if($this->is_dir($path)) {
+			return 'httpd/unix-directory';
+		}
+		$source=$this->fopen($path,'r');
+		if(!$source) {
+			return false;
+		}
+		$head=fread($source,8192);//8kb should suffice to determine a mimetype
+		if($pos=strrpos($path,'.')) {
+			$extension=substr($path,$pos);
+		}else{
+			$extension='';
+		}
+		$tmpFile=\OC_Helper::tmpFile($extension);
+		file_put_contents($tmpFile,$head);
+		$mime=\OC_Helper::getMimeType($tmpFile);
+		unlink($tmpFile);
+		return $mime;
+	}
+	public function hash($type,$path,$raw = false) {
+		$tmpFile=$this->getLocalFile();
+		$hash=hash($type,$tmpFile,$raw);
+		unlink($tmpFile);
+		return $hash;
+	}
+// 	abstract public function free_space($path);
+	public function search($query) {
+		return $this->searchInDir($query);
+	}
+	public function getLocalFile($path) {
+		return $this->toTmpFile($path);
+	}
+	private function toTmpFile($path) {//no longer in the storage api, still usefull here
+		$source=$this->fopen($path,'r');
+		if(!$source) {
+			return false;
+		}
+		if($pos=strrpos($path,'.')) {
+			$extension=substr($path,$pos);
+		}else{
+			$extension='';
+		}
+		$tmpFile=\OC_Helper::tmpFile($extension);
+		$target=fopen($tmpFile,'w');
+		\OC_Helper::streamCopy($source,$target);
+		return $tmpFile;
+	}
+	public function getLocalFolder($path) {
+		$baseDir=\OC_Helper::tmpFolder();
+		$this->addLocalFolder($path,$baseDir);
+		return $baseDir;
+	}
+	private function addLocalFolder($path,$target) {
+		if($dh=$this->opendir($path)) {
+			while($file=readdir($dh)) {
+				if($file!=='.' and $file!=='..') {
+					if($this->is_dir($path.'/'.$file)) {
+						mkdir($target.'/'.$file);
+						$this->addLocalFolder($path.'/'.$file,$target.'/'.$file);
+					}else{
+						$tmp=$this->toTmpFile($path.'/'.$file);
+						rename($tmp,$target.'/'.$file);
+					}
+				}
+			}
+		}
+	}
+// 	abstract public function touch($path, $mtime=null);
+
+	protected function searchInDir($query,$dir='') {
+		$files=array();
+		$dh=$this->opendir($dir);
+		if($dh) {
+			while($item=readdir($dh)) {
+				if ($item == '.' || $item == '..') continue;
+				if(strstr(strtolower($item),strtolower($query))!==false) {
+					$files[]=$dir.'/'.$item;
+				}
+				if($this->is_dir($dir.'/'.$item)) {
+					$files=array_merge($files,$this->searchInDir($query,$dir.'/'.$item));
+				}
+			}
+		}
+		return $files;
+	}
+
+	/**
+	 * check if a file or folder has been updated since $time
+	 * @param int $time
+	 * @return bool
+	 */
+	public function hasUpdated($path,$time) {
+		return $this->filemtime($path)>$time;
+	}
+}