<?
require_once 'authorization.php';

class FileManager extends Authorization {

	// Set absolute path to folder
	function setFolderName($currentFolder){
		return $this->siteDir.$currentFolder;
	}
	
	// Upload file
	function uploadFile($name){
		
		// Check files were uploaded
		if (!$_FILES[$name]['name']) {
			$this->errors[] = 'Upload error, no files were provided';
			return false;		
		}
		
		// Check file name
		$fileName=$_FILES[$name]['name'];
		if (!$fileName=$this->checkFileName($fileName)){
			return false; 
		}
		
		// Check file type
		$fileType=$_FILES[$name]['type'];
		if (!$this->CheckFileType($fileType)){
			return false; 
		}
		
		// Check whether file already exists
		if (!$this->checkFileExs($fileName)){
			return false; 
		}
		
		// Copy file
		if (@copy($_FILES[$name]['tmp_name'], $this->folderName."/".$fileName)){
			return $fileName;
		}
		else{
			$this->errors[] = 'Upload error, faild to upload: '.$fileName;
			return false;
		}
	}
	
	// Delete file
	function deleteFile($fileName, $description=''){
		
		if (@unlink($fileName)){
			return true;
		}
		else{
			$this->errors[] = $description;
			return false;
		}
	}
	
	// Create folder
	function createFolder($folder){
		
		// Check name
		if (!$folder=$this->checkFileName($folder)){
			return false; 
		}
		if (@mkdir($this->folderName."/".$folder, 0755)){
			return $folder;
		}
		else{
			$this->errors[] = "Unable create folder: ".$folder."";
			return false;
		}
	}
	
	// Remove folder
	function removeFolder($folder){
		$dir=opendir($this->folderName."/".$folder);
		while (($d=readdir($dir))!==false){
			
			if (is_file($this->folderName."/".$folder."/".$d)) {
				if (!@unlink($this->folderName."/".$folder."/".$d)){
					$this->errors[] = 'Error deleting file: '.$d;
					return false;
				}
			}
			elseif (is_dir($this->folderName."/".$folder."/".$d) && ($d!==".") && ($d!=="..")){
				$this->removeFolder($folder."/".$d);
			}
		}
		closedir($dir);
		
		if (!@rmdir($this->folderName."/".$folder)){
			$this->errors[] = 'Error deleting directory: '.$folder;
			return false;
		}

		return true;
	}

	// Copy folder
	function copyFolder($folder, $copy_folder){
		
		// Create copy_folder
		if (!@mkdir($this->folderName2."/".$copy_folder, 0755)){
			$this->errors[] = "Unable create folder: ".$copy_folder."";
			return false;
		}
		// Copy files from folder to copy_folder
		if (!($dir=opendir($this->folderName."/".$folder))){
			$this->errors[] = 'Error open folder: '.$folder;
			return false;
		}
		
		while (($d=readdir($dir))!==false){
			
			if (is_file($this->folderName."/".$folder."/".$d)) {
				if (!@copy($this->folderName."/".$folder."/".$d, $this->folderName2."/".$copy_folder."/".$d)){
					$this->errors[] = 'Error copying file: '.$d;
					return false;
				}
			}
			elseif (is_dir($this->folderName."/".$folder."/".$d) && ($d!==".") && ($d!=="..")){
				$this->copyFolder($folder."/".$d, $copy_folder."/".$d);
			}
		}
		closedir($dir);
		
		return true;
	}
	
	// Check permission to write in folder
	function writeableFolder($folder){
		$dir=opendir($this->folderName."/".$folder);
		while (($d=readdir($dir))!==false){
			
			if (is_file($this->folderName."/".$folder."/".$d)) {
				continue;
			}
			elseif (is_dir($this->folderName."/".$folder."/".$d) && ($d!==".") && ($d!=="..")){
				$this->writeableFolder($folder."/".$d);
			}
		}
		closedir($dir);
		
		if (!is_writeable($this->folderName."/".$folder)){
			$this->errors[] = "Folder: ".$folder." is not writeable";
			return false;
		}
		return true;
	}
	
	// Check file name
	function checkFileName($fileName, $description = ''){
		
		// Remove illegal characters
		$fileName = str_replace(' ', '_', $fileName);
		$fileName = str_replace('%20', '_', $fileName);	
		$fileName = preg_replace("/[^a-zA-Z0-9._]/i", "", $fileName);
		if (strstr($fileName,'..')){ 
			$this->errors[] = $description;
			return false; 
		}
		return $fileName;
	}
		
	// Check whether file already exists
	function checkFileExs($fileName){
		
		if (file_exists($this->folderName.$fileName)) {
			$this->errors[] = "File: ".$fileName." already exists";
			return false; 
		}
		return true;
	}
	
	// Check file type
	function CheckFileType($fileType, $description = ''){
		
		if (strlen($this->allowedTypes) > 0){
			// Put types into an array
			$allowedTypes = explode(' ',$this->allowedTypes);
			// Check whether type is in array
			if (!in_array($fileType, $allowedTypes)){
				$this->errors[] = $description;
				return false;
			}
		}
		return true;
	}
	
	// Return the extension of the given file
	function getExtension($filename){
		
		return strrchr($filename, ".");
	}
}
?>