<?php

/**
 * @class TimeTableMgr
 * @version $Id: TimeTableMgr.php 2809 2015-03-05 09:50:52Z natacha $
 * @todo MANAGE TT created by Search and Plot interactive - HERE?
 *
 */

function timeFormat($myString) {
    if (format == "Y z H i s")  {
         $tt = getdate(strtotime($myString));
         return sprintf("%04d",$tt["year"])." "
               .sprintf("%03d",$tt["yday"]+1)." "
               .sprintf("%02d",$tt["hours"])." "
               .sprintf("%02d",$tt["minutes"])." "
               .sprintf("%02d",$tt["seconds"]);
     }
    return date(format,strtotime($myString)); 
    
 }

class TimeTableMgr extends AmdaObjectMgr {	
     
//TODO add catalogs as for requestMgr


	function __construct($user) {
		parent::__construct('Tt.xml');
		$this->contentRootId = 'timeTable-treeRootNode';
		$this->contentRootTag = 'timetabList';
		$this->attributes = array('name' => '', 'intervals' => '');
		$this->optionalAttributes = array();
		$this->objTagName = 'timetab';
		$this->id_prefix = 'tt_';

		if (!file_exists($this->xmlName)) {
			  $this->createDom();
			  $this->xp = new domxpath($this->contentDom); 
		}
	}
	
	
	protected function createDom() {
		
		$types = array('timetab' => 'timeTable', 'catalog' => 'catalog');

		$rootElement = $this->contentDom->createElement('ws');
                foreach ($types as $key => $value) {
		    $contentId = $value.'-treeRootNode';
		    $contentTag = $key.'List';
		    $typeElement = $this->contentDom->createElement($contentTag);
		    $typeElement->setAttribute('xml:id', $contentId);
		    $rootElement->appendChild($typeElement);
		}
                $this->contentDom->appendChild($rootElement);
		$this->contentDom->save($this->xmlName);
        }

	/*
	 *       rename  Time Table in  id.xml
	 */
	protected function renameInResource($name, $id) {
		if (!file_exists(USERTTDIR.$id.'.xml')) return false;

		$this->objectDom -> load(USERTTDIR.$id.'.xml');
		if (!($objToRename = $this->objectDom->getElementById($id))) return false;
		$objToRename -> getElementsByTagName('name')->item(0)->nodeValue = $name;
		$this->objectDom ->save(USERTTDIR.$id.'.xml');
		 
		return true;
	}

	protected function deleteParameter($id){
		if (file_exists(USERTTDIR.$id.'.xml')) unlink(USERTTDIR.$id.'.xml');
	}

	/*
	 *        Check if difference is name and info only
	 */
	protected function renameOnly($p) {
		//if (!($p->intervals)) return true;
		return false;
	}


	/*
	 *         Create Time Table
	 */
	protected function createParameter($p, $folder){
		if ($this -> objectExistsByName($p->name)) {
			$p -> id  = $this -> getObjectIdByName($p->name);
			$this -> deleteObject($p);
		}
		$this->id = $this->setId();
		$this->created = date('Y-m-d\TH:i:s');
		if (!$this->id) return array('error' => ID_CREATION_ERROR);
		$this->resFileName = USERTTDIR.$this->id.'.xml';
		$rootElement = $this->objectDom->createElement('timetable');
		$rootElement->setAttribute('xml:id',$this->id);
	 
		foreach ($p as $key => $value)		
		if ($key != 'id' && $key != 'leaf' && $key != 'nodeType') {
			if ($key == 'created') {
				$rootElement->appendChild($this->objectDom->createElement($key, $this->created));
			}
			/*else if ($key == 'intervals') {
				$n_int = 0;
				foreach ($value as $item) {
					$newInterval = $this->objectDom->createElement('intervals');
					$newInterval->appendChild($this->objectDom->createElement('start', $item->start));
					$newInterval->appendChild($this->objectDom->createElement('stop', $item->stop));
					$rootElement->appendChild($newInterval);
					$n_int++;
				}
			}*/
			else if ($key != 'intervals')
			$rootElement->appendChild($this->objectDom->createElement($key, htmlspecialchars($value)));
		}

		$this->objectDom->appendChild($rootElement);
		$this->objectDom->save($this->resFileName);
		$obj = new stdClass();
		$obj->name = $p->name;
		$obj->intervals = $p->nbIntervals;
		$this -> addToContent($obj, $folder);
		return array('id' => $this->id,'created' => $this->created,'info' =>$obj->intervals.' intervals' );

	}

    protected function call_intersection($fst, $snd) {
    	$inf = ( $fst[0] > $snd[0] ) ? $fst[0] : $snd[0];
        $sup = ( $fst[1] < $snd[1] ) ? $fst[1] : $snd[1];
        if ( $inf >= $sup ) { $inter[] = array(0,0); }
        else {$inter[] = array($inf,$sup); }
        return $inter;
    }
    
	/*
	 *         For TT download : file format in text
	 */    
	protected function xsl2text($file,$format) {
		 define("format", $format);
	  $xslt = new XSLTProcessor();
	   
	// add PHP functions to XSLT functions
	  $xslt -> registerPHPFunctions();
	  
	 // Load Time table
	  $xml = new domDocument("1.0");
	  $xml->load($file);
	
	  // Load XSL file
	  $xsl = new domDocument("1.0");
	  if ($format == "Y-m-dTH:i:s") $xslName = "xml2iso.xsl";
	  else $xslName = "xml2all.xsl";
	  $xsl->load(XMLPATH.$xslName);
	
	  // Import XSL and write output file in text format
	  $xslt -> importStylesheet($xsl);
	  $filename = $xml->getElementsByTagName('name')->item(0)->nodeValue.".txt";
	  $output=fopen(USERWORKINGDIR.$filename, "w");
	  fwrite($output, trim($xslt -> transformToDoc($xml)->firstChild->wholeText));
	  fclose($output);

	  return USERWORKINGDIR.$filename;		
	}
	
	/*
	 *         For TT download : file format in vot
	 */    
	public function xsl2vot($file,$format) {	
		$xslt = new XSLTProcessor();
	   
	 	// Load Time table
	  	$xml = new domDocument("1.0");
	  	$xml->load($file);
	  	
	  	// Load XSL file
	  	$xsl = new domDocument("1.0");
	  	$xsl->load(XMLPATH.'xml2vot.xsl');
	  	
	  	// Import XSL and write output file in vot format
	  	$xslt -> importStylesheet($xsl);
	  	$vot = new domDocument("1.0");
	  	$vot -> loadXML($xslt -> transformToXML($xml));
	  	$filename = $xml->getElementsByTagName('name')->item(0)->nodeValue.".xml";
	  	$vot -> save(USERWORKINGDIR.$filename);

	  	return USERWORKINGDIR.$filename;
	}
	
      /*
      * Uploaded text file => convert to array
      */
	protected function text2amda($tmp_file, $onlyDescription = false) {

          
          $suffix = explode('.', basename($tmp_file));

	  $lines = file($tmp_file,FILE_SKIP_EMPTY_LINES);
	
	  $description="Uploaded Time Table".PHP_EOL; 

	  foreach ($lines as $line){  
	    if ($line[0] == '#') $description=$description."\n".substr($line,1,-1);
	    else {
		$date = explode(' ',$line);
		if (!strtotime(trim($date[0]))) {
			$description=$description."\n".$line;
			continue;
		}
// check if it is ISO format
	       if (!isset($isIso)) $isIso = preg_match('/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})$/', trim($date[0]));
	        if (!$isIso) {
		  $tempT = strtotime(trim($date[0]));
		  $startDate = date('Y-m-d',$tempT)."T".date('H:i:s',$tempT);
		  $tempT = strtotime(trim($date[1]));
		  $stopDate = date('Y-m-d',$tempT)."T".date('H:i:s',$tempT);
//TODO convert time into non standard formats
	    //  $startDate = DateTime::createFromFormat($timeFormat, trim($date[0]);
	    //  $start = $startDate->format('Y-m-d')."T".$startDate->format('H:i:s');
            //  $stopDate = DateTime::createFromFormat($timeFormat, trim($date[1]);
            //  $stop = $stopDate->format('Y-m-d')."T".$stopDate->format('H:i:s');
            if (!$onlyDescription)
		  		$attributesToReturn['intervals'][] = array('start' => $startDate, 'stop' => $stopDate); 
	        }
	      else {
	      	if (!$onlyDescription)
				$attributesToReturn['intervals'][] = array('start' => trim($date[0]), 'stop' => trim($date[1]));
	      } 
	    }
	  }
	  	   	  	   
	  $attributesToReturn['description'] = $description;
	  $attributesToReturn['name'] = basename($tmp_file, '.'.$suffix[1]);
	  $attributesToReturn['created'] = date('Y-m-d')."T".date('H:i:s');

	  return $attributesToReturn;

	}
	
		
      /*
      * Uploaded vot TT => convert to array
      */
	protected function vot2amda($tmp_file, $onlyDescription = false) {		  
	  // Load Time table		
	    $this->objectDom -> load($tmp_file);
	    $objToGet = $this->objectDom->getElementsByTagName('TABLEDATA')->item(0);
	    $attributesToReturn['name'] = $tmp_file;
	    $attributes = $objToGet -> childNodes;
	    foreach($attributes as $attribute)
		if ($attribute->tagName == 'TR') {
		    $start = $attribute -> getElementsByTagName('TD')->item(0) -> nodeValue;
		    $stop = $attribute -> getElementsByTagName('TD')->item(1) -> nodeValue;
		    if (!$onlyDescription)
		   		$attributesToReturn['intervals'][] = array('start' => $start, 'stop' => $stop);
		}
	    $suffix = explode('.', basename($tmp_file));   
	    $attributesToReturn['name'] = basename($tmp_file, '.'.$suffix[1]); 
	    $attributesToReturn['created'] = date('Y-m-d')."T".date('H:i:s');
	    $attributesToReturn['description'] = htmlspecialchars($this->objectDom->getElementsByTagName('DESCRIPTION')->item(0) -> nodeValue);
	    return($attributesToReturn);
	}
	
	
	/*****************************************************************
	 *                           PUBLIC FUNCTIONS
	 *****************************************************************/
      

	/*
	 *   Get Object into Edit
	 */

	function getObject($id, $nodeType) {

		if ($nodeType == 'sharedtimeTable') {			
			$pathid =	SHAREDPATH.'TT/'.$id;
		}
		else {
			$pathid = USERTTDIR.$id;		
		}

		if (!file_exists($pathid.'.xml')) return array('error' => NO_OBJECT_FILE);
		$this->objectDom -> load($pathid.'.xml');
		if (!($objToGet = $this->objectDom->getElementById($id))) return array('error' => NO_SUCH_ID);
		$attributesToReturn['id'] = $objToGet->getAttribute('xml:id');
		$attributes = $objToGet -> childNodes;

		$nbInt = 0;
		foreach($attributes as $attribute)
		if($attribute->nodeType == XML_ELEMENT_NODE){
		  /*if ($attribute->tagName == 'intervals') {
			  $start = $attribute -> getElementsByTagName('start')->item(0) -> nodeValue;
			  $stop = $attribute -> getElementsByTagName('stop')->item(0) -> nodeValue;
			  $attributesToReturn['intervals'][] = array('start' => $start, 'stop' => $stop);
		  }
		  else
		  $attributesToReturn[$attribute->tagName] =  $attribute->nodeValue;*/
			 //BRE - load all except intervals - Intervals will be loaded later with 'loadIntervalsFromTT' function
			 if ($attribute->tagName != 'intervals')
      $attributesToReturn[$attribute->tagName] =  $attribute->nodeValue;
    else
      $nbInt++;
		}
		
		$attributesToReturn['nbIntervals'] = $nbInt;
		
		return  $attributesToReturn;
	}
	
	public function createObject($p, $folder){
	
		if ($p -> leaf)
		{
			$result = $this->createParameter($p, $folder);
			if ($result['error'])
				return $result;
			$cacheMgr = new TimeTableCacheMgr();
			if (isset($p->cacheToken) && ($p->cacheToken != ''))
			{
				$resultSaveInt = $cacheMgr->saveInTT($result['id'], "update", $p->cacheToken);
				if (!$resultSaveInt['success'])
				{
					if ($resultSaveInt['message'])
						return array('error' => $resultSaveInt['message']);
					else
						return array('error' => 'Unknown error during intervals save');
				}
			}
			return $result;
		}
		//      else return $this->createFolder($p);
		//TODO check if this is possible?
		else return array('error' => 'createFolder should be called from RENAME');
	
	}
	
	
	public function modifyObject($p) {
		$folder = $this->getObjectFolder($p->id);
		
		//Copy TT in a tempory file
		$ttFilePath = USERTTDIR.$p->id.'.xml';
		$tmpFileExist = FALSE;
		if (file_exists($ttFilePath))
			$tmpFileExist = copy($ttFilePath,$ttFilePath.".tmp");
		
		//Delete TT
		$this->deleteObject($p);
		
		//Save modifications
		try {
			$result = $this->createObject($p, $folder);
			if ($result['error'])
				throw new Exception($result['error']);
			if ($tmpFileExist)
				unlink($ttFilePath.".tmp");
			return array('id' => $p->id, 'info' => $result['nbIntervals'].' intervals' );
		}
		catch (Exception $e) {
			//Restore TT file
			if ($tmpFileExist)
			{
				copy($ttFilePath.".tmp", $ttFilePath);
				unlink($ttFilePath.".tmp");
			}
			return array ('error' => $e->getMessage());
		}
	}
	
	 public function loadIntervalsFromTT($id,$typeTT,$start = NULL, $limit = NULL)
  {

  if ($typeTT == 'sharedtimeTable') {			
			$pathid =	SHAREDPATH.'TT/'.$id;
		}
		else {
			$pathid = USERTTDIR.$id;		
		}
		
  	 //load intervals from TT id
    if (!file_exists($pathid.'.xml'))
      return array('success' => false, 'message' => "Cannot find TT file ".$id);
    $this->objectDom -> load($pathid.'.xml');
    if (!($objToGet = $this->objectDom->getElementById($id)))
      return array('success' => false, 'message' => NO_SUCH_ID." ".$id);
    
    $xpath = new DOMXPath($this->objectDom);
    $intervals =  $xpath->query('//intervals');
    
    $result = array();
    
    if (!isset($start) || !isset($limit))
    {
    	foreach ($intervals as $interval)
    	{
			$startTime = $interval->getElementsByTagName('start')->item(0)->nodeValue;
			$stopTime  = $interval->getElementsByTagName('stop')->item(0)->nodeValue;
			array_push($result, array('start' => $startTime, 'stop' => $stopTime));
		}
    }
    else
    {
    	for ($i = 0; $i < $limit; ++$i)
    	{
    		if ($start+$i >= $intervals->length)
    			break;
    		$startTime = $intervals->item($start+$i)->getElementsByTagName('start')->item(0)->nodeValue;
    		$stopTime  = $intervals->item($start+$i)->getElementsByTagName('stop')->item(0)->nodeValue;
    		array_push($result, array('start' => $startTime, 'stop' => $stopTime));
    	}
    }
    
    return array(
		'totalCount' => $intervals->length,
		'intervals'  => $result,
		'start' => isset($start) ? $start : 0,
    	'limit' => isset($limit) ? $limit : 0,
		'success'    => true
    );
    
  }

  public function saveIntervals($id,$intervals,$action)
  {
  	 if (substr($id,0,6) == 'shared') {
			  $pathid =	SHAREDPATH.'TT/'.$id;
		  }
    else {
			  $pathid = USERTTDIR.$id;		
		  } 
    if (!file_exists($pathid.'.xml'))
      return array('success' => false, 'message' => "Cannot find TT file ".$id);
    $this->objectDom -> load($pathid.'.xml');
    
    if (!($objToGet = $this->objectDom->getElementById($id))) 
      return array('success' => false, 'message' => NO_SUCH_ID." ".$id);

    //remove old intervals
    $crtNode = $objToGet->firstChild;
    
    while ($crtNode)
    {
      if (($crtNode->nodeType != XML_ELEMENT_NODE) || ($crtNode->tagName != 'intervals'))
      {	
        $crtNode = $crtNode->nextSibling;
        continue;
      }
      $toRemove = $crtNode;
      $crtNode = $crtNode->nextSibling;
      $objToGet->removeChild($toRemove);
      unset($toRemove);
    }
      
    //add new intervals
    foreach ($intervals as $interval)
    {
    	 $newInterval = $this->objectDom->createElement('intervals');
					 $newInterval->appendChild($this->objectDom->createElement('start',$interval->start));
					 $newInterval->appendChild($this->objectDom->createElement('stop',$interval->stop));
					 $this->objectDom->documentElement->appendChild($newInterval);
    }

        //save modifications
    $this->id = $id;
    $this->resFileName = USERTTDIR.$this->id.'.xml';
    $this->objectDom->save($this->resFileName);
    
    unset($this->objectDom);
    
    return array('success' => true,'action' => $action, 'nbIntervals' => count($intervals));
  }
	
      
	  public function getUploadedObject($name, $format, $onlyDescription = false) {

		if (strpos($name,'.txt') !== false || strpos($name,'.asc') !== false ) {
		  $attributesToReturn = $this->text2amda(USERTEMPDIR.$name, $onlyDescription);
		  $attributesToReturn['objName'] = $name;
		  $attributesToReturn['objFormat'] = $format;
		  return $attributesToReturn;
		}
		
		if ($format == 'VOT') {
			 $attributesToReturn = $this->vot2amda(USERTEMPDIR.$name, $onlyDescription);
			 $attributesToReturn['objName'] = $name;
			 $attributesToReturn['objFormat'] = $format;
			 return $attributesToReturn;
		}
	 
                if (strpos($name,'.xml') !== false) {
                    $temp = explode('.xml', $name);
		  $name = $temp[0];
		}

		
	 if (!file_exists(USERTEMPDIR.$name.'.xml')) 
			  return array('error' => 'no such name');
		$this->objectDom -> load(USERTEMPDIR.$name.'.xml');
		if (!($objToGet = $this->objectDom->getElementsByTagName('timetable')->item(0)) && 
		    !($objToGet = $this->objectDom->getElementsByTagName('TimeTable')->item(0))) 
			  return array('error' => 'no time table');

		$attributes = $objToGet -> childNodes;
		$attributesToReturn['name'] = $name;
		$attributesToReturn['objName'] = $name;
		$attributesToReturn['objFormat'] = $format;

		foreach($attributes as $attribute)
		  if($attribute->nodeType == XML_ELEMENT_NODE){
		       if ($attribute->tagName == 'intervals') {
			      $start = $attribute -> getElementsByTagName('start')->item(0) -> nodeValue;
			      $stop = $attribute -> getElementsByTagName('stop')->item(0) -> nodeValue;
			      if (!$onlyDescription)
			      	$attributesToReturn['intervals'][] = array('start' => $start, 'stop' => $stop);
		      } 
		      else if ($attribute->tagName == 'Interval') {
			      $start = $attribute -> getElementsByTagName('Start')->item(0) -> nodeValue;
			      $stop = $attribute -> getElementsByTagName('Stop')->item(0) -> nodeValue;
			      if (!$onlyDescription)
			      	$attributesToReturn['intervals'][] = array('start' => $start, 'stop' => $stop);
		      }
		      else {
			  switch (strtolower($attribute->tagName)) {
			     case 'created' : 
					      $attributesToReturn['created'] =  $attribute->nodeValue;
					      break;
			     case 'chain'  :
			     case 'source' :  
					     $attributesToReturn['description'] = $attribute->nodeValue;
					     break;
			    default:  break;
			  }
			}
		  }
		return  $attributesToReturn;
	}


//TODO getObject only!!!! => change DD_Search output
      public function getTmpObject($folderId, $name, $onlyDescription = false) {
		$filePath = USERWORKINGDIR.$folderId.'/'.$name.'.xml';
		if (!file_exists($filePath)) 
			return array('error' => 'Cannot find result file');
		
		$dom = new DomDocument('1.0'); 
		$dom->formatOutput = true;
		
		if (!$dom -> load($filePath))
			return array('error' => 'Cannot load result file');
		
		$descNodes = $dom->getElementsByTagName('description');
		if ($descNodes->length > 0)
			$attributesToReturn['description'] = $descNodes->item(0)->nodeValue;
		
		$creatNodes = $dom->getElementsByTagName('created');
		if ($creatNodes->length > 0)
			$attributesToReturn['created'] = $creatNodes->item(0)->nodeValue;
		
		$histNodes = $dom->getElementsByTagName('history');
		if ($histNodes->length > 0)
			$attributesToReturn['history'] = $histNodes->item(0)->nodeValue;
	
		$attributesToReturn['objName'] = $name;
		$attributesToReturn['folderId'] = $folderId;
	
		if (!$onlyDescription)
		{
			$intNodes = $dom->getElementsByTagName('intervals');
			foreach ($intNodes as $intNode)
			{
				$startNodes = $intNode->getElementsByTagName('start');
				if ($startNodes->length <= 0)
					return array('error' => 'Error detected in result file');
				$stopNodes = $intNode->getElementsByTagName('stop');
				if ($stopNodes->length <= 0)
					return array('error' => 'Error detected in result file');
				$attributesToReturn['intervals'][] = array('start' => $startNodes->item(0)->nodeValue,
														'stop' => $stopNodes->item(0)->nodeValue);
			}
		}
		
		return  $attributesToReturn;
	}

/*
 * merge time tables
 */
    	public  function merge($obj)   {
        /**
         * Array of intervals, used like : 
         * [{start:'2010-01-01T23:00:00',stop:'2011-01-01T20:00:00'},{start:'2009-01-01T23:00:00',stop:'2010-01-01T20:00:00'}]
         * $attributesToReturn['intervals'][] = array('start' => $start, 'stop' => $stop);
         */
		
    	$intervals = 0;	
    		
    		for ( $i = 0; $i < count($obj->ids); $i++ ) {
    			$table[$i] = $this->loadIntervalsFromTT($obj->ids[$i]);
    			for ($j=0; $j < count($table[$i]['intervals']); $j++) {
  					$interval[$i][$j][0] = $table[$i]['intervals'][$j]['start'];
  					$interval[$i][$j][1] = $table[$i]['intervals'][$j]['stop'];
  				}
    			$intervals += count($interval[$i]);
    		}  
    		if ( $intervals > 10000) set_time_limit(1800);
    		
    		$final = array();
    		for ( $i = 0; $i < count($obj->ids); $i++ ) {
    			$final = array_merge($final, $interval[$i]);        		
      		}
    		sort($final);
    		
    		// Algorithm of union
    		$line = 0;
        	$i = 0;
        	$a = $final[$i][0];
	        while ($i < count($final)-1) {
	           if ($final[$i+1][1] <= $final[$i][1])
	           {
	                  array_splice($final,$i+1,1);
	           }
	           else if (($final[$i+1][0] <= $final[$i][1]) && ($final[$i+1][1] >= $final[$i][1]))
	           {
	                  $i++;
	           }
	           else {
	                $start[$line] = $a;
	                $stop[$line] = $final[$i][1];
	                $i++;
	                $line++;
	                $a = $final[$i][0];
	           }
	        }
	        $start[$line] = $a;
	        $stop[$line] = $final[$i][1];
	        $line++;
        
		$objTT = new stdClass();	            	        
		$objTT->name = $obj->name;
    	$objTT->nodeType = 'timeTable';
    	$objTT->leaf = true;
    	$objTT->created = null;
    	$objTT->history = $obj->history;
    	for ($i=0; $i < count($start); $i++) {	
							$inter = new stdClass();
							$inter->start = $start[$i];
							$inter->stop = $stop[$i];
							$objTT->intervals[] = $inter;
    	}
    	$objTT->nbIntervals = count($start);
		$this->objectDom = new DomDocument('1.0'); 
		$this->objectDom->formatOutput = true;
 		
		$res = $this->createParameter($objTT, $folder);
		if ($res['error'])
		  return $res;
 		  
		$this->saveIntervals($res['id'],$objTT->intervals,'merge');
 		
		return $res;
		
    } 
    
/*
 * intersect time tables
 */
    public  function intersect($obj)   {
    	
    	for ( $i = 0; $i < count($obj->ids); $i++ ) {
    		$table[$i] = $this->loadIntervalsFromTT($obj->ids[$i]);
    		for ($j=0; $j < count($table[$i]['intervals']); $j++) {
  				$interval[$i][$j][0] = $table[$i]['intervals'][$j]['start'];
  				$interval[$i][$j][1] = $table[$i]['intervals'][$j]['stop'];
  			}
    		$intervals += count($interval[$i]);
    	}  
    	if ( $intervals > 10000) set_time_limit(1800);

    	// Sort intervals in time tables
        sort($interval[0]);
        sort($interval[1]);
            	
    	$i = 0;
	    $j = 0;
	    $line = 0;
	
	    while ( ($i < count($interval[0])) && ($j < count($interval[1])) ) {
	    	$inter = $this->call_intersection($interval[0][$i], $interval[1][$j]);
	
	        if ($inter[0][0] != 0 && $inter[0][1] != 0)
	        {
	        	$start[$line] = $inter[0][0];
	            $stop[$line] = $inter[0][1];
	            $line++;
	        }
	
	        if ( $interval[0][$i][1] < $interval[1][$j][1] ) { $i++; }
	        else {  $j++; }
	    }
	
	    // Intersection is empty
	    if ( $line == 0 ) {
	    	$result ="empty";
	    } 
	    else {
	    	$objTT->name = $obj->name;
    		$objTT->nodeType = 'timeTable';
    		$objTT->leaf = true;
    		$objTT->created = null;
    		$objTT->history = $obj->history;
    		for ($i=0; $i < count($start); $i++) {	
				$inter = new stdClass();
				$inter->start = $start[$i];
				$inter->stop = $stop[$i];
				$objTT->intervals[] = $inter;
    		}
    		$objTT->nbIntervals = count($start);
    		
    		if (count($objTT->intervals) == 0)
    		  $result ="empty";
    		else
    		{
    		  $this->objectDom = new DomDocument('1.0'); 
			     $this->objectDom->formatOutput = true;
	    	  $result = $this->createObject($objTT, $folder);
	    	
	       if (!isset($result['error']))
		        $this->saveIntervals($result['id'],$objTT->intervals,'intersect');
		
		     }  	
	    }
	    return  $result;		
    }
    
/*
*   execute = download TT
*/
         public function execute($obj) {

         	$final = null;
      		$liste = null;
      		
      		// Delete *.zip and *.gz
      		foreach (glob(USERWORKINGDIR."*.gz") as $filename) unlink($filename);
      		foreach (glob(USERWORKINGDIR."*.zip") as $filename) unlink($filename);
      		
                $transform = "xsl2".$obj->fileformat;
                $format = $obj->timeformat;
// shared or my
                
             
        	for ($i=0; $i < count($obj->list); $i++) {
        		$file = $obj->list[$i].'.xml';
                        $pathid  = (substr($obj->list[$i],0,6) == 'shared') ?  SHAREDPATH.'TT/': USERTTDIR; 
        		if (file_exists($pathid.$file)) {                                
        			$result = $this->$transform($pathid.$file,$format);                                 
        			$liste = $liste." ".substr(strrchr($result, "/"),1);
           			$final = $final." ".$result;        					
        		}   				
        	}
        	// Compress the result
			$archive = USERWORKINGDIR."Timetable_archive_".date('Ymd_Hi');

			if ($obj->compression == "zip")
         	{
                            system("zip -Dj ".$archive.".zip ".$final." 1> /dev/null 2> /dev/null");
			    $outFile = $archive.".zip";
			}
			else if ($obj->compression == "tar+gzip")
         	{
			    system("tar cfz ".$archive.".tar.gz --directory=".USERWORKINGDIR." ".$liste."");
			    $outFile = $archive.".tar.gz";
         	}   

			// Delete modified time tables (.txt or .xml)
			$tt = split(" ",$final);
			foreach ($tt as $name) {
			           if (file_exists($name)) unlink($name);
			}
			$retFile = substr_replace($outFile,'', 0, strlen(BASE_PATH));

			return array('download' => $retFile);
        			
         }
         
         function validNameObject($p){
         	// overwritten
         	$res = parent::validNameObject($p);
         	 
         	if (!$res['valid'])
         		return $res;
         	 
         	//no space
         	if (strpos($p->name, ' ') === FALSE)
         		return array('valid' => true);
         	
         	return array('valid' => false, 'error' => 'Space character is not allowed');
         }

}
?>