<?php
require_once(ROOT."include/config.inc.php");
require_once(ROOT."include/template.inc.php");
require_once(ROOT."include/error.inc.php");
require_once(ROOT."include/array.inc.php");
require_once(ROOT."include/db.inc.php");
require_once(CMS_DIR."modules/_cmsobject.class.php");

/** Page
 *  abstract superclass for all pages
 *
 * @version 2.1.0
 * @since   2007-05-01
 * @author  martin lenzelbauer
 *
 * @change  2007-06-18
 *          changed error output in canBeDeleted()
 *
 * @change  2008-09-23
 *          updated loading & publishing routines to keep memory low in PHP5
 *
 */
class Page extends CmsObject{

	// --- page metadata --- //
	
	var $classId;							//id in the class table	
	
	
	/** C'tor (default settings)
	 * @param line   sql result line
	 * @param parent parent element
	 */
	//-----------------------------------------------
	function Page($id, $parent){
	//-----------------------------------------------
		parent::CmsObject($id, $parent);
		$this->classId = 0;
	}
	
	
	/** @see CmsObject::load()
	 */
	//-----------------------------------------------
	function load($path=array()){
	//-----------------------------------------------	
		$this->childObjects = array();
		$query = sprintf("SELECT * FROM bruckm_index WHERE id = %d", $this->id);
		$result = dbQuery($query);
		$line = mysqli_fetch_array($result, MYSQLI_ASSOC);
		$this->name = $line['name'];
		$this->classId = $line['classId'];
		$this->parentId = $line['parentId'];
		$this->editable = $line['editable'];
		$this->listable = $line['listable'];
		$this->visible = $line['visible'];
		$this->lastUpdate = $line['lastUpdate'];
		if(!empty($line['childObjects'])){
			$childObjects = explode("\t", $line['childObjects']);
			foreach($childObjects as $id){
				$this->childObjects[] = FlexiconFactory::instanceById($id, $this);
			}
		}
		if(sizeof($path) > 0 && $path[0] == $this->id){
			array_shift($path);
			for($i = 0; $i < sizeof($this->childObjects); $i++) {
				$this->childObjects[$i]->load($path);
			}
		}
		$this->loaded = true;
	}
	

	/** @see CmsObject::save()
	 */
	//-----------------------------------------------
	function save(){
	//-----------------------------------------------	
		if($this->id){
			$this->doSave();
		}
		else{
			$this->doCreate();
		}
	}
	
	
	/** updates the database 
	 */
	//----------------------------------------------
	function doSave(){
	//----------------------------------------------
		$childIds = array();
		for($i = 0; $i < sizeof($this->childObjects); $i++) {
			if($this->childObjects[$i]->getId() == 0){
				$this->childObjects[$i]->save();
			}
			$childIds[] = $this->childObjects[$i]->getId();
		}
		$query = sprintf("UPDATE bruckm_index SET 
											lastUpdate = NOW(),
											name = %s,
											classId = %d,
											childObjects = %s, 
											editable = %s, 
											listable = %s,
											visible = %d
											WHERE id = %d",
											sqlstring($this->name),
											sqlnum($this->classId),
											sqlstring(implode("\t", $childIds)),
											sqlstring($this->editable),
											sqlstring($this->listable),
											sqlbool($this->visible),
											sqlnum($this->id));
		dbQuery($query);
	}
	
	
	/** creates a new line in the database
	 */
	//----------------------------------------------
	function doCreate(){
	//----------------------------------------------
		$childIds = array();
		for($i = 0; $i < sizeof($this->childObjects); $i++) {
			if($this->childObjects[$i]->getId() == 0){
				$this->childObjects[$i]->save();
			}
			$childIds[] = $this->childObjects[$i]->getId();
		}
		$query = sprintf("INSERT INTO bruckm_index (name, lastUpdate, class, classId, 
											parentId, childObjects, editable, listable, visible) 
											VALUES (%s, NOW(), %s, %d, %d, %s, %s, %s, %d)",
											sqlstring($this->name),
											sqlstring(get_class($this)),
											sqlnum($this->classId),
											sqlnum($this->parentId),
											sqlstring(implode("\t", $childIds)),
											sqlstring($this->editable),
											sqlstring($this->listable),
											sqlbool($this->visible));
		dbQuery($query);
		$this->id = mysql_insert_id();
	}
	
	
	/** @see CmsObject::delete()
	 */
	//-----------------------------------------------
	function delete(){
	//-----------------------------------------------
		if($_SESSION['userlevel'] < $this->editable){
			$this->addError("Sie besitzen nicht die nötigen Rechte, um dieses Element zu löschen!");
		}
		if($this->locked){
			$this->addError("Das Element kann nicht gelöscht werden, da es gerade von einem anderen Benutzer bearbeitet wird");
			return false;
		}
		if($this->id == 0){
			return true;
		}
		if(!$this->canBeDeleted()){
			return false;
		}
		$this->doDelete();
		return true;
	}
	
	
	/** deletes data referenced by the page
	 * @return nothing
	 */
	//-----------------------------------------------
	function doDelete(){
	//-----------------------------------------------
		$query = sprintf("DELETE FROM bruckm_index WHERE id = %d LIMIT 1", $this->id);
		dbQuery($query);
		foreach($this->childObjects as $i=>$child){
			$this->childObjects[$i]->load();
			$this->childObjects[$i]->delete();
		}
	}
	
	
	/** checks wether the element can be deleted
	 * @returns true, if the element can be deleted
	 */
	//----------------------------------------------
	function canBeDeleted(){
	//----------------------------------------------
		for($i = 0; $i < sizeof($this->childObjects); $i++) {
			$this->childObjects[$i]->load();
			if(!$this->childObjects[$i]->canBeDeleted()){
				$this->addError($this->name." kann nicht gelöscht werden");
				$this->addError($this->childObjects[$i]->getErrors());
				return false;
			}
		}
		return true;
	}


	/** installs the database for class dependent data
	 */
	//----------------------------------------------
	function install(){
	//----------------------------------------------
		return;
	}	
	
	
	/** @see CmsObject::update()
	 */
	//-----------------------------------------------
	function update(){
	//-----------------------------------------------
		if(isset($_POST['name'])){
			$this->name = $_POST['name'];
			$this->editable = $_POST['editable'];
			$this->listable = $_POST['listable'];
			$this->visible = $_POST['visible'];
		}
	}
	
	
	/** prints a menu item
	 * @return string
	 */
	//-------------------------------------------
	function printAsMenuItem(){
	//-------------------------------------------
		return "<li><a href=\"?id=".$this->id."\" target=\"_self\">".htmlspecialchars($this->name)."</a></li>";
	}
	
	
	/** updates the parent id
	 * @param parentId parent id
	 */
	//-------------------------------------------
	function setParentId($parentId){
	//-------------------------------------------
		parent::setParentId($parentId);
		$query = sprintf("UPDATE bruckm_index SET parentId = %d WHERE id = %d", $parentId, $this->getId());
		dbQuery($query);
	}
		
};


?>