<?php defined("IN_DOCEBO") or die('Direct access is forbidden.');

/* ======================================================================== \
| 	DOCEBO - The E-Learning Suite											|
| 																			|
| 	Copyright (c) 2008 (Docebo)												|
| 	http://www.docebo.com													|
|   License 	http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt		|
\ ======================================================================== */

/**
 * @package admin-core
 * @subpackage resource
 * @version  $Id: $
 */
// ----------------------------------------------------------------------------


class Timetable {

	var $prefix=NULL;
	var $dbconn=NULL;


	function Timetable($prefix=FALSE, $dbconn=NULL) {
		$this->prefix=($prefix !== false ? $prefix : $GLOBALS["prefix_fw"]);
		$this->dbconn=$dbconn;
	}


	function _query( $query ) {

		if($this->dbconn === NULL) $rs = sql_query( $query );
		else $rs = sql_query( $query, $this->dbconn );

		/* $ok=($rs ? "[ ]" : "[!]");
		file_put_contents("/path/to/log.txt", $ok."TT:".$query."\n", FILE_APPEND); */

 		return $rs;
	}


	function _insQuery( $query ) {
		if( $this->dbconn === NULL ) {
			if( !sql_query( $query ) )
				return FALSE;
		} else {
			if( !sql_query( $query, $this->dbconn ) )
				return FALSE;
		}
		if( $this->dbconn === NULL )
			return mysql_insert_id();
		else
			return mysql_insert_id($this->dbconn);
	}


	function _getMainTable() {
		return $this->prefix."_resource_timetable";
	}


	function _getResourceTable() {
		return $this->prefix."_resource";
	}


	function &getResourceObject($resource_code) {
		$res=FALSE;

		$qtxt ="SELECT * FROM ".$this->_getResourceTable()." ";
		$qtxt.="WHERE resource_code='".$resource_code."'";

		$q=$this->_query($qtxt);

		if (($q) && (mysql_num_rows($q) > 0)) {
			$row=mysql_fetch_assoc($q);

			$class_name="Resource".ucfirst(strtolower($resource_code));
			$resource_file =$GLOBALS["where_".$row["platform"]]."/lib/resources/lib.resource_";
			$resource_file.=strtolower($resource_code).".php";

			if (file_exists($resource_file)) {

				require_once($resource_file);
				$res=new $class_name();

			}
		}

		return $res;
	}


	/**
	 * @param string $resource_code
	 * @param integer $resource_id
	 * @param string $consumer_code
	 * @param integer $consumer_id
	 * @param datetime $start_date if FALSE will be considered infinite
	 * @param datetime $end_date   if FALSE will be considered infinite
	 *
	 * @return mixed FALSE if fails, item id if succeed
	 */
	function addEvent($resource_code, $resource_id, $consumer_code, $consumer_id, $start_date=FALSE, $end_date=FALSE) {
		$res=FALSE;

		$resource_code=substr($resource_code, 0, 60);
		$resource_id=(int)$resource_id;
		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$r_obj=& $this->getResourceObject($resource_code);
		$available=$r_obj->checkAvailability($resource_id, $start_date, $end_date); //var_dump($available);
		
		if ($available) {
			
			$field_list ="resource, resource_id, consumer, consumer_id";
			$field_list.=($start_date !== FALSE ? ", start_date" : "");
			$field_list.=($end_date !== FALSE ? ", end_date" : "");
			$field_val="'".$resource_code."', '".$resource_id."', '".$consumer_code."', '".$consumer_id."'";
			$field_val.=($start_date !== FALSE ? ", '".$start_date."'" : "");
			$field_val.=($end_date !== FALSE ? ", '".$end_date."'" : "");

			$qtxt="INSERT INTO ".$this->_getMainTable()." (".$field_list.") VALUES(".$field_val.")";

			$res=$this->_insQuery($qtxt);
		}
		
		return $res;
	}


	/**
	 * @param mixed id false if you don't know the id, else id number is used
	 *                  to perform the "id > 0" / "not false" check only here
	 *                  instead of each time.
	 * @return mixed id of found item or FALSE if it fails
	 */
	function getEventId($id, $resource_code, $resource_id, $consumer_code, $consumer_id, $start_date=FALSE, $end_date=FALSE) {
		$res=FALSE;

		if (($id !== FALSE) && ($id > 0)) {
			$res=$id;
		}
		else { // Find id by parameters

			$where ="WHERE resource='".$resource_code."' AND resource_id='".$resource_id."' ";
			$where.="AND consumer='".$consumer_code."' AND consumer_id='".$consumer_id."' ";
			$where.="AND start_date".($start_date !== FALSE ? "='".$start_date."' " : " IS NULL ");
			$where.="AND end_date".($end_date !== FALSE ? "='".$end_date."' " : " IS NULL ");

			$sel_qtxt="SELECT id FROM ".$this->_getMainTable()." ".$where; //echo $sel_qtxt;

			$q=$this->_query($sel_qtxt);

			if (($q) && (mysql_num_rows($q) > 0)) {
				$row=mysql_fetch_assoc($q);
				$id=(int)$row["id"];
			}
			else {
				return $res;
			}

			$res=$id;
		}

		return $res;
	}


	/**
	 * Used to update the start and/or end date of the event
	 * @return mixed id of updated item or FALSE if it fails
	 */
	function updateEvent($id, $start_date, $end_date, $old_start_date=FALSE, $old_end_date=FALSE, $resource_code=FALSE, $resource_id=FALSE, $consumer_code=FALSE, $consumer_id=FALSE) {
		$res=FALSE;

		$resource_code=substr($resource_code, 0, 60);
		$resource_id=(int)$resource_id;
		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;
		// We call the checkNullDate only for the old dates
		$old_start_date=$this->checkNullDate($old_start_date);
		$old_end_date=$this->checkNullDate($old_end_date);

		if (($start_date === FALSE) && ($end_date === FALSE))
			return $res; // Nothing to update


		$qtxt ="UPDATE ".$this->_getMainTable()." SET ";
		$first=TRUE;
		if ($start_date !== FALSE) {
			$qtxt.=(!$first ? ", " : "");
			$qtxt.="start_date='".$start_date."' ";
			$first=FALSE;
		}
		if ($end_date !== FALSE) {
			$qtxt.=(!$first ? ", " : "");
			$qtxt.="end_date='".$end_date."' ";
			$first=FALSE;
		}


		$id=$this->getEventId($id, $resource_code, $resource_id, $consumer_code, $consumer_id, $old_start_date, $old_end_date);

		$qtxt.="WHERE id='".$id."'";

		if (($id !== FALSE) && ($id > 0)) {
			$q=$this->_query($qtxt);

			if ($q)
				$res=$id;
		}

		return $res;
	}


	function deleteEvent($id, $resource_code=FALSE, $resource_id=FALSE, $consumer_code=FALSE, $consumer_id=FALSE, $start_date=FALSE, $end_date=FALSE) {

		$resource_code=substr($resource_code, 0, 60);
		$resource_id=(int)$resource_id;
		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$id=$this->getEventId($id, $resource_code, $resource_id, $consumer_code, $consumer_id, $start_date, $end_date);

		$qtxt ="DELETE FROM ".$this->_getMainTable()." WHERE id='".(int)$id."' LIMIT 1";
		$q=$this->_query($qtxt);

		return $q;
	}


	/**
	 * @param string $resource_code
	 * @param integer $consumer_code
	 * @param string $consumer_id
	 * @param mixed $exclude_resource_id if not FALSE will use an array to specify wich for wich resource id
	 *                                   the consumer entry have not to be deleted
	 * @return query result
	 */
	function deleteAllConsumerEventsForResource($resource_code, $consumer_code, $consumer_id, $exclude_resource_id=FALSE) {

		$resource_code=substr($resource_code, 0, 60);
		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;

		$qtxt ="DELETE FROM ".$this->_getMainTable()." WHERE resource='".$resource_code."' AND ";
		$qtxt.="consumer='".$consumer_code."' AND consumer_id='".$consumer_id."'";

		if (($exclude_resource_id !== FALSE) && (is_array($exclude_resource_id)) && (count($exclude_resource_id) > 0)) {
			$qtxt.=" AND resource_id NOT IN (".implode(",", $exclude_resource_id).")";
		}

		$q=$this->_query($qtxt);

		return $q;

	}


	/**
	 * Try to update an event; if not exsists will create it
	 */
	function saveEvent($id, $start_date, $end_date, $old_start_date=FALSE, $old_end_date=FALSE, $resource_code=FALSE, $resource_id=FALSE, $consumer_code=FALSE, $consumer_id=FALSE) {

		$res=$this->updateEvent($id, $start_date, $end_date, $old_start_date, $old_end_date, $resource_code, $resource_id, $consumer_code, $consumer_id);

		if ($res === FALSE) {
			$res=$this->addEvent($resource_code, $resource_id, $consumer_code, $consumer_id, $start_date, $end_date);
		}
		return $res;
	}


	function updateEventDateByResource($resource_code, $resource_id, $start_date, $end_date, $consumer_code=FALSE) {

		$resource_code=substr($resource_code, 0, 60);
		$resource_id=(int)$resource_id;
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$new_start_date=($start_date !== FALSE ? "'".$start_date."'" : "NULL");
		$new_end_date=($end_date !== FALSE ? "'".$end_date."'" : "NULL");

		$qtxt ="UPDATE ".$this->_getMainTable()." SET start_date=".$new_start_date.", end_date=".$new_end_date." ";
		$qtxt.="WHERE resource='".$resource_code."' AND resource_id='".$resource_id."'";
		$qtxt.=($consumer_code !== FALSE ? " AND consumer='".$consumer_code."'" : "");

		$q=$this->_query($qtxt);

		return $q;
	}


	function updateEventDateByConsumer($consumer_code, $consumer_id, $start_date, $end_date, $resource_code=FALSE) {

		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$new_start_date=($start_date !== FALSE ? "'".$start_date."'" : "NULL");
		$new_end_date=($end_date !== FALSE ? "'".$end_date."'" : "NULL");

		$qtxt ="UPDATE ".$this->_getMainTable()." SET start_date=".$new_start_date.", end_date=".$new_end_date." ";
		$qtxt.="WHERE consumer='".$consumer_code."' AND consumer_id='".$consumer_id."'";
		$qtxt.=($resource_code !== FALSE ? " AND resource='".$resource_code."'" : "");

		$q=$this->_query($qtxt);

		return $q;
	}


	/**
	 * This funciont will return wich resources are used by a given consumer and in wich period.
	 * @return array like: array[]=>array[id, consumer, consumer_id, resource, resource_id, start_date, end_date]
	 */
	function getConsumerResources($consumer_code, $consumer_id, $start_date=FALSE, $end_date=FALSE, $resouce_code=FALSE) {
		$res=array();

		$consumer_code=substr($consumer_code, 0, 60);
		$consumer_id=(int)$consumer_id;
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);


		$qtxt ="SELECT * FROM ".$this->_getMainTable()." WHERE ";
		$qtxt.=($resouce_code !== FALSE ? "resource='".$resouce_code."' AND " : "");
		$qtxt.="consumer='".$consumer_code."' AND consumer_id='".$consumer_id."'";

		$where_start_date=" AND start_date >= '".$start_date."' OR start_date IS NULL";
		$qtxt.=($start_date !== FALSE ? $where_start_date : "");

		$where_end_date=" AND end_date <= '".$end_date."' OR end_date IS NULL";
		$qtxt.=($end_date !== FALSE ? $where_end_date : "");

		$q=$this->_query($qtxt);

		if (($q) && (mysql_num_rows($q) > 0)) {
			while($row=mysql_fetch_assoc($q)) {
				$res[]=$row;
				// TODO: cache result in global variable
			}
		}

		return $res;
	}


	function getResourceEntries($resource_code, $resource_id=FALSE, $start_date=FALSE, $end_date=FALSE, $consumer_filter=FALSE) {

		$resource_code=substr($resource_code, 0, 60);
		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$r_obj=& $this->getResourceObject($resource_code);
		$res=$r_obj->getResourceEntries($resource_id, $start_date, $end_date, $consumer_filter);

		return $res;
	}


	/**
	 * @param bool allow_partial if true will check if a resource is busy only for some time during the
	 *                                   specified period, instead of if the resource is busy for the whole period.
	 * @param mixed $exclude_consumer_id if not FALSE will use an array to specify wich consumer id has to be
	 *                                   excluded from the check.
	 */
	function getResourcesInUse($resource_code, $start_date=FALSE, $end_date=FALSE, $allow_partial=FALSE, $exclude_consumer_id=FALSE) {

		$start_date=$this->checkNullDate($start_date);
		$end_date=$this->checkNullDate($end_date);

		$r_obj=& $this->getResourceObject($resource_code);
		$res=$r_obj->getResourcesInUse($start_date, $end_date, $allow_partial, $exclude_consumer_id);

		return $res;
	}


	function checkNullDate($date) {

		if ($date !== FALSE) {
			if ((empty($date)) || (substr($date, 0, 10) == "0000-00-00"))
				$date=FALSE;
		}

		return $date;
	}


}





?>
