<?php
/*
 * Copyright 2007-2013 Charles du Jeu - Abstrium SAS <team (at) pyd.io>
 * This file is part of Pydio.
 *
 * Pydio is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Pydio 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
 * along with Pydio.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The latest code can be found at <http://pyd.io/>.
 *
 */
defined('AJXP_EXEC') or die( 'Access not allowed');

require_once(AJXP_INSTALL_PATH."/plugins/access.fs/class.fsAccessWrapper.php");

/**
 * Encapsulation of the PEAR webDAV client
 * @package AjaXplorer_Plugins
 * @subpackage Access
 */
class s3AccessWrapper extends fsAccessWrapper {

    public static $lastException;

    /**
     * Initialize the stream from the given path. 
     * Concretely, transform ajxp.webdav:// into webdav://
     *
     * @param string $path
     * @return mixed Real path or -1 if currentListing contains the listing : original path converted to real path
     */
    protected static function initPath($path, $streamType, $storeOpenContext = false, $skipZip = false){    	
    	$url = parse_url($path);
    	$repoId = $url["host"];
    	$repoObject = ConfService::getRepositoryById($repoId);
    	if(!isSet($repoObject)) {
            $e = new Exception("Cannot find repository with id ".$repoId);
            self::$lastException = $e;
            throw $e;
        }
        $baseContainer = $repoObject->getOption("CONTAINER");
        $p = "s3://".$baseContainer.str_replace("//", "/", $url["path"]);
        return $p;
    }
    
    /**
     * Opens the stream
     * Diff with parent class : do not "securePath", as it removes double slash
     *
     * @param String $path Maybe in the form "ajxp.fs://repositoryId/pathToFile" 
     * @param String $mode
     * @param unknown_type $options
     * @param unknown_type $opened_path
     * @return unknown
     */
    public function stream_open($path, $mode, $options, &$context)
    {
    	try{
	    	$this->realPath = $this->initPath($path, "file");
    	}catch (Exception $e){
    		AJXP_Logger::logAction("error", array("message" => "Error while opening stream $path"));
    		return false;
    	}
    	if($this->realPath == -1){
    		$this->fp = -1;
    		return true;
    	}else{
	        $this->fp = fopen($this->realPath, $mode, $options);
	        return ($this->fp !== false);
    	}		
    }

    /**
     * Stats the given path.
     * Fix PEAR by adding S_ISREG mask when file case.
     *
     * @param unknown_type $path
     * @param unknown_type $flags
     * @return unknown
     */
    public function url_stat($path, $flags){
    	// File and zip case
        // AJXP_Logger::debug("Stating $path");
    	$stat = @stat($this->initPath($path, "file"));
        if($stat == null) return null;
        if($stat["mode"] == 0666){
            $stat[2] = $stat["mode"] |= 0100000; // S_ISREG
        }
        $parsed = parse_url($path);
        if($stat["mtime"] == $stat["ctime"]  && $stat["ctime"] == $stat["atime"] && $stat["atime"] == 0 && $parsed["path"] != "/") {
            //AJXP_Logger::debug("Nullifying stats");
            return null;
        }
        return $stat;

    	// Non existing file
   		return null;
    }
    
    /**
     * Opens a handle to the dir
     * Fix PEAR by being sure it ends up with "/", to avoid 
     * adding the current dir to the children list.
     *
     * @param unknown_type $path
     * @param unknown_type $options
     * @return unknown
     */
	public function dir_opendir ($path , $options ){
		$this->realPath = $this->initPath($path, "dir", true);	
		if($this->realPath[strlen($this->realPath)-1] != "/"){
			$this->realPath.="/";
		}
		if(is_string($this->realPath)){
			$this->dH = @opendir($this->realPath);
		}else if($this->realPath == -1){
			$this->dH = -1;
		}
		return $this->dH !== false;
	}

	
	// DUPBLICATE STATIC FUNCTIONS TO BE SURE 
	// NOT TO MESS WITH self:: CALLS
	
	public static function removeTmpFile($tmpDir, $tmpFile){
		if(is_file($tmpFile)) unlink($tmpFile);
		if(is_dir($tmpDir)) rmdir($tmpDir);
	}

	protected static function closeWrapper(){
		if(self::$crtZip != null) {
			self::$crtZip = null;
			self::$currentListing  = null;
			self::$currentListingKeys = null;
			self::$currentListingIndex = null;
			self::$currentFileKey = null;
		}
	}

	public static function getRealFSReference($path, $persistent = false){
        $tmpFile = AJXP_Utils::getAjxpTmpDir()."/".md5(time()).".".pathinfo($path, PATHINFO_EXTENSION);
       	$tmpHandle = fopen($tmpFile, "wb");
       	self::copyFileInStream($path, $tmpHandle);
       	fclose($tmpHandle);
       	if(!$persistent){
       		register_shutdown_function(array("AJXP_Utils", "silentUnlink"), $tmpFile);
       	}
       	return $tmpFile;
	}

	
    public static function isRemote(){
    	return true;
    }
    
	public static function copyFileInStream($path, $stream){
        AJXP_Logger::debug("Should load ".$path);
		$fp = fopen($path, "r");
		while (!feof($fp)) {
			$data = fread($fp, 4096);
			fwrite($stream, $data, strlen($data));
		}
		fclose($fp);
	}

	public static function changeMode($path, $chmodValue){
        // DO NOTHING!
		//$realPath = self::initPath($path, "file");
		//chmod($realPath, $chmodValue);
	}
}
?>