<?php
/**
 * @class AmdaObjectMgr 
 * @version $Id: AmdaObjectMgr.php 2891 2015-04-30 11:31:51Z elena $

 */

class AmdaObjectMgr
{

	protected $xmlName, $xp;      
	protected $attributes, $optionalAttributes;       
	protected $contentRootId, $objTagName;
	protected $descFileName, $resFileName;
	protected $id_prefix;
	protected $contentRootTag;
	protected $obj, $id;
	protected $types;

	public $contentDom; 
	public $objectDom;

	protected function __construct($xmlFile) 
	{

		// content XML

		$this->xmlName = USERWSDIR."/".$xmlFile;
		$this->contentDom = new DomDocument("1.0");
		$this->contentDom->preserveWhiteSpace = false;
		$this->contentDom->formatOutput = true;

		if (file_exists($this->xmlName)) {

			$this->contentDom -> load($this->xmlName);	 
			$this->xp = new domxpath($this->contentDom); 

		}

		// object desc XML
		//TODO not used in RequestMgr

		$this->objectDom = new DomDocument("1.0"); 
		$this->objectDom->preserveWhiteSpace = false;
		$this->objectDom->formatOutput = true;

	}

	private function getNewId() 
	{                   

		//  Get all ID attributes
		$elements = $this->xp->query("//".$this->objTagName."/@xml:id");

		// Now find New Valid ID  

		if ($elements->length  > 0) 
		{
			if($elements->length > 0) for ($i = 0; $i < $elements->length; $i++) 
			{

				$id =  explode('_',$elements->item($i)->nodeValue);
				$idList[] = $id[1]; 

			}

			sort($idList);

			for ($i = 0; $i < count($idList); $i++) 
			{
				if ($idList[$i] > $i) 
				{ 

					$newID = $i;
					break;

				}  

				$newID = $i+1;  
			}                 

		  } else

			$newID = 0;
			

		return $newID;
	}

	protected function setId() 
	{ 	

		$id_ = $this->getNewId();

		if ($id_ === false) return false;
		$this->id = $this->id_prefix.$id_;

		return $this->id;         
	} 
   

	protected function objectExistsByName($name)
	{	

		$this->obj = $this->xp->query("//".$this->objTagName."[@name='".$name."']");		 

		if ($this->obj->length != 0) return true;

		return false;
	} 

	protected function getObjectIdByName($name) 
	{	

		$this->obj = $this->xp->query("//".$this->objTagName."[@name='".$name."']");

		if ($this->obj->length == 0) return false; 
		$id = $this->obj->item(0)->getAttribute('xml:id');
		if ($id) return $id;
		

		return false;           
	}
	
	protected function folderExistsByName($name){

	
		$this->obj = $this->xp->query("//".$this->contentRootTag."/folder[@name='".$name."']");		 

		if ($this->obj->length != 0) return true;

		return false;
	}  

	protected function objectExistsById($id)
	{ 	

		$this->obj = $this->contentDom->getElementById($id); 
		if ($this->obj != null) return $this->obj;

		return false;

	} 

	protected function createObjectResource(){}
	protected function renameInResource(){}

/*
*  Write Object into desc file
*/

	protected function createObjectDescription($obj)
	{	

		$root = $this->objectDom->createElement($this->objTagName); 
		$root->setAttribute('xml:id',$this->id);

	      foreach($obj as $key => $value) 
	      {

				if ($key != 'id' && $key != 'leaf' && $key != 'nodeType' && !is_array($value) && !is_object($value)) 

				{

					$node =  $this->objectDom->createElement($key,htmlspecialchars($value)); 
					$root -> appendChild($node);
				}

	      }      

		// add Optional Attributes if they are undefined	      

		foreach ($this->optionalAttributes as $key => $value)
		{
			if ($root->getElementsByTagName($key)->length == 0) 
			{

				$node =  $this->objectDom->createElement($key,htmlspecialchars($value));  
				$root -> appendChild($node);
			}

		}

		$this->objectDom->appendChild($root);
		$this->objectDom->save($this->descFileName);  
	}
	

/*
*    Just Save  Content XML
*/

	protected function saveContent() 
	{	
		$this->contentDom->save($this->xmlName);

	}

    
/*
* Add Object to Content XML
*/

	protected function addToContent($obj, $folder) 
	{              

		$folderToAdd = null;

		$objList = $this->contentDom->getElementById($this->contentRootId); 		

		$newObj = $this->contentDom->createElement($this->objTagName);
		$newObj->setAttribute('xml:id',$this->id);
		// object to mapped array
		$obj_arr = (array)$obj;

		foreach ($this->attributes as $key => $value) 
		{

			$newObj->setAttribute($key, $obj_arr[$key]);	 
		}              
		if ($folder != null)  
			$folderToAdd = $this->contentDom->getElementById($folder);

		if ($folderToAdd) 
			$folderToAdd -> appendChild($newObj);
		else 
			$objList -> appendChild($newObj);		  

		$this->saveContent();