/Joomla_1_6_x/com_gcalendar/admin/libraries/GCalendar/Entry.php

<?php
/**
 * GCalendar is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GCalendar 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GCalendar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Allon Moritz
 * @copyright 2007-2011 Allon Moritz
 * @since 2.2.0
 */

class GCalendar_Entry extends Zend_Gdata_Calendar_EventEntry{

	const SINGLE_WHOLE_DAY    = 1;
	const SINGLE_PART_DAY     = 2;
	const MULTIPLE_WHOLE_DAY  = 3;
	const MULTIPLE_PART_DAY   = 4;

	private $dayType = null;
	private $startDate = null;
	private $endDate = null;
	private $location = null;
	private $gcalId = null;
	private $params = array();

	public function setParam($key, $value){
		$this->params[$key] = $value;
	}

	public function getParam($key){
		return $this->params[$key];
	}

	public function getGCalId(){
		if($this->gcalId == null){
			$this->gcalId = substr($this->getId(), strrpos($this->getId(), '/')+1);
		}
		return $this->gcalId;
	}

	public function getDayType(){
		if($this->dayType == null){
			$SECSINDAY = 86400;

			$oldTz = null;
			$timezone = $this->getTimezone();
			if(!empty($timezone) && function_exists('date_default_timezone_get')){
				$oldTz = date_default_timezone_get();
				date_default_timezone_set($timezone);
			}
			if (($this->getStartDate()+ $SECSINDAY) <= $this->getEndDate()) {

				if (($this->getStartDate()+ $SECSINDAY) == $this->getEndDate() && (date('g:i a',$this->getStartDate())=='12:00 am')) {
					$this->dayType =  GCalendar_Entry::SINGLE_WHOLE_DAY;
				} else {
					if ((date('g:i a',$this->getStartDate())=='12:00 am')&&(date('g:i a',$this->getEndDate())=='12:00 am')){
						$this->dayType =  GCalendar_Entry::MULTIPLE_WHOLE_DAY;
					}else{
						$this->dayType =  GCalendar_Entry::MULTIPLE_PART_DAY;
					}
				}

			}else{
				$this->dayType = GCalendar_Entry::SINGLE_PART_DAY;
			}
			if($oldTz != null){
				date_default_timezone_set($oldTz);
			}
		}
		return $this->dayType;
	}

	public function getStartDate(){
		if($this->startDate == null){
			$when = $this->getWhen();
			if(empty($when)){
				return null;
			}
			if(is_array($when)){
				$when = reset($when);
			}
			$this->startDate = $this->tstamptotime($when->getStartTime());
		}
		return $this->startDate;
	}

	public function getEndDate(){
		if($this->endDate == null){
			$when = $this->getWhen();
			if(empty($when)){
				return null;
			}
			if(is_array($when)){
				$when = reset($when);
			}
			$this->endDate = $this->tstamptotime($when->getEndTime());
		}
		return $this->endDate;
	}

	public function getLocation(){
		if($this->location == null){
			$where = $this->getWhere();
			if(is_array($where)){
				$where = reset($where);
			}
			$this->location = $where->getValueString();
		}
		return $this->location;
	}

	/**
	 * Returns a unix timestamp of the given iso date.
	 *
	 * @param $iso_date
	 * @return unix timestamp
	 */
	private function tstamptotime($iso_date) {
		// converts ISODATE to unix date
		// 1984-09-01T14:21:31Z
		$feed_timezone = $this->getTimezone();
		if(!empty($feed_timezone) && function_exists('date_default_timezone_get')){
			$tz = date_default_timezone_get();
			date_default_timezone_set($feed_timezone);
		}
		sscanf($iso_date,"%u-%u-%uT%u:%u:%uZ",$year,$month,$day,$hour,$min,$sec);
		$newtstamp = mktime($hour,$min,$sec,$month,$day,$year);
		if(!empty($feed_timezone) && function_exists('date_default_timezone_get')){
			date_default_timezone_set($tz);
		}
		return $newtstamp;
	}

	/**
	 * Returns an integer less than, equal to, or greater than zero if
	 * the first argument is considered to be respectively less than,
	 * equal to, or greater than the second.
	 * This function can be used to sort an array of GCalendar_Entry
	 * items with usort.
	 *
	 * @see http://www.php.net/usort
	 * @param $event1
	 * @param $event2
	 * @return the comparison integer
	 */
	public function compare(GCalendar_Entry $event1, GCalendar_Entry $event2){
		return $event1->getStartDate()-$event2->getStartDate();
	}
	
	/**
	 * Compares the events descnding.
	 * 
	 * @see GCalendar_Entry::compare()
	 * @param GCalendar_Entry $event1
	 * @param GCalendar_Entry $event2
	 * @return number
	 */
	public function compareDesc(GCalendar_Entry $event1, GCalendar_Entry $event2){
		return $event2->getStartDate()-$event1->getStartDate();
	}
}
?>