Get departure times for each line from a station

linzag.class.php

<?php
/*
 * Author: Gregor Ganglberger
 * E-Mail: gg@grexaut.net
 * License: Creative Commons 
 * Notice: This class uses the following real-time API from Open Data: CC-BY-3.0: Stadt Linz - data.linz.gv.at
 * 
 * Links: 
 * http://creativecommons.org/licenses/by/3.0/at/
 * http://www.linz-abfahrten.at
 * http://data.linz.gv.at/daten/LinzAGLinien/index.html?ckan_name=elektronische-fahrplanauskunft-der-linz-ag-linien--echtzeit
 * http://data.linz.gv.at/nutzungsbedingungen/
 * 
 * 
 * 
 * File: linzag.class.php v1.0
 * Description: Get departure times for each line from a station
 * 
 * Functions:
 * getStationInfos($searchstring) => return one or more stations with following informations: ID, Name, PLZ (4020,4030,4040,..)
 *                                  $stationname => searchstring like = "Hauptplatz", results are: "Hautplatz" and "Hauptplatz Obere Donaulände"
 * getDepTime($station_id) => return departure times each line in minutes (limited to 10), 
 * 
 */
class Departure
{
	protected $dm = "http://www.linzag.at/static/XML_DM_REQUEST?sessionID=[SESSION]&locationServerActive=1&type_dm=any&name_dm=[ORIGIN]&limit=10";
	protected $dm_time = "http://www.linzag.at/static/XML_DM_REQUEST?sessionID=[SESSION]&requestID=1&dmLineSelectionAll=1";
	
	public function getStationInfos($searchstring)
	{
		$pre_xml = str_replace("[ORIGIN]",$searchstring,$this->dm);
		$pre_xml = str_replace("[SESSION]",0,$pre_xml);
		$xml = new SimpleXMLElement(file_get_contents($pre_xml));
                $station = array();
		$i=0;
		foreach ( $xml->itdDepartureMonitorRequest->itdOdv->itdOdvName->odvNameElem as $elem_station )   
		{
			if($elem_station['anyType'] == "stop" || $xml->itdDepartureMonitorRequest->itdOdv->itdOdvName['state'] == "identified")
			{
                                
				$station[$i]['ID'] = $elem_station['id'];
				$station[$i]['Name'] = $elem_station['objectName'];
				$station[$i]['PLZ'] = $elem_station['postCode'];
				$i++;
			}
		}
		return $station;
	}
	
	
	public function setSession($origin_id)
	{
                
		$pre_xml = str_replace("[ORIGIN]",$origin_id,$this->dm);
		$pre_xml = str_replace("[SESSION]",0,$pre_xml);
		$xml = new SimpleXMLElement(file_get_contents($pre_xml));
		$this->session = $xml['sessionID'];	
	
	
	}
	public function getDepTime($origin_id)
	{
		$this->setSession($origin_id);
		
		$pre_xml = str_replace("[SESSION]",$this->session,$this->dm_time);
		$xml = new SimpleXMLElement(file_get_contents($pre_xml));
		$dep = array();
		$i = 0;
		foreach($xml->itdDepartureMonitorRequest->itdDepartureList->itdDeparture as $origin)
		{
			$dep[$i]['line'] = (string) $origin->itdServingLine['number'];
			$dep[$i]['direction'] = (string) $origin->itdServingLine['direction'];
			$dep[$i]['day'] = (string) $origin->itdDateTime->itdDate['day'];
			$dep[$i]['month'] = (string) $origin->itdDateTime->itdDate['month'];
			$dep[$i]['year'] =  (string) $origin->itdDateTime->itdDate['year'];
			$dep[$i]['hour'] = (string) str_pad($origin->itdDateTime->itdTime['hour'],2,0,STR_PAD_LEFT);
			$dep[$i]['minute'] = (string) str_pad($origin->itdDateTime->itdTime['minute'],2,0,STR_PAD_LEFT);
                        
                        
                        $dep_time = new DateTime($dep[$i]['year']."-".$dep[$i]['month']."-".$dep[$i]['day']." ".$dep[$i]['hour'].":".$dep[$i]['minute']);
                        $now = new DateTime("now");
                        $diff = $now->diff($dep_time);
                        $minutes = $diff->format("%h")*60;
                        $minutes += $diff->format("%i");
                        $dep[$i]['depMinutes'] = $minutes;
                        
                        
			$i++;
		}
		return $dep;
	}
}
?>