<?php
$service_periods = Array(
        'sunday',
        'saturday',
        'weekday'
);
 
function service_period($date = "")
{
        
        if (isset($_SESSION['service_period'])) return $_SESSION['service_period'];
        $override = getServiceOverride($date);
        if ($override['service_id']){
                return $override['service_id'];
        }
 
        switch (date('w',($date != "" ? $date : time()))) {
        case 0:
                return 'sunday';
        case 6:
                return 'saturday';
        default:
                return 'weekday';
        }
}
function midnight_seconds($time = "")
{
        // from http://www.perturb.org/display/Perlfunc__Seconds_Since_Midnight.html
        if ($time != "") {
                return (date("G", $time) * 3600) + (date("i", $time) * 60) + date("s", $time);
        }
        if (isset($_SESSION['time'])) {
                $time = strtotime($_SESSION['time']);
                return (date("G", $time) * 3600) + (date("i", $time) * 60) + date("s", $time);
        }
        return (date("G") * 3600) + (date("i") * 60) + date("s");
}
function midnight_seconds_to_time($seconds)
{
        if ($seconds > 0) {
                $midnight = mktime(0, 0, 0, date("n") , date("j") , date("Y"));
                return date("h:ia", $midnight + $seconds);
        }
        else {
                return "";
        }
}
if ($GTFSREnabled) {
$serviceAlertCause = Array(
"UNKNOWN_CAUSE" => "Unknown cause",
"OTHER_CAUSE" => "Other cause",
"TECHNICAL_PROBLEM" => "Technical problem",
"STRIKE" => "Strike",
"DEMONSTRATION" => "Demonstration",
"ACCIDENT" => "Accident",
"HOLIDAY" => "Holiday",
"WEATHER" => "Weather",
"MAINTENANCE" => "Maintenance",
"CONSTRUCTION" => "Construction",
"POLICE_ACTIVITY" => "Police activity",
"MEDICAL_EMERGENCY" => "Medical emergency"
);
$serviceAlertEffect = Array(
"NO_SERVICE" => "No service",
"REDUCED_SERVICE" => "Reduced service",
"SIGNIFICANT_DELAYS" => "Significant delays",
"DETOUR" => "Detour",
"ADDITIONAL_SERVICE" => "Additional service",
"MODIFIED_SERVICE" => "Modified service",
"OTHER_EFFECT" => "Other effect",
"UNKNOWN_EFFECT" => "Unknown effect",
"STOP_MOVED" => "Stop moved");
 
set_include_path(get_include_path() . PATH_SEPARATOR . $labsPath."lib/Protobuf-PHP/library/DrSlump/");
 
include_once("Protobuf.php");
include_once("Protobuf/Message.php");
include_once("Protobuf/Registry.php");
include_once("Protobuf/Descriptor.php");
include_once("Protobuf/Field.php");
 
include_once($labsPath."lib/Protobuf-PHP/gtfs-realtime.php");
include_once("Protobuf/CodecInterface.php");
include_once("Protobuf/Codec/PhpArray.php");
include_once("Protobuf/Codec/Binary.php");
include_once("Protobuf/Codec/Binary/Writer.php");
include_once("Protobuf/Codec/Json.php");
 
function getServiceAlerts($filter_class = "", $filter_id = "") {
/*
 
  also need last modified epoch of client gtfs
  
         - add,remove,patch,inform (null)
            - stop
            - trip
            - network
          - classes (WHERE=)
            - route (short_name or route_id)
            - street
            - stop
            - trip 
            Currently support:
            network inform
            trip patch: stop remove
            street inform: route inform, trip inform, stop inform
            route patch: trip remove
            */
            $fm = new transit_realtime\FeedMessage();
$fh = new transit_realtime\FeedHeader();
$fh->setGtfsRealtimeVersion(1);
$fh->setTimestamp(time());
$fm->setHeader($fh);
foreach(getCurrentAlerts() as $alert) {
$fe = new transit_realtime\FeedEntity();
        $fe->setId($alert['id']);
        $fe->setIsDeleted(false);
        $alert = new transit_realtime\Alert();  
                $tr = new transit_realtime\TimeRange();
                        $tr->setStart($alert['start']);
                        $tr->setEnd($alert['end']);
                $alert-> addActivePeriod($tr);
                        $informedEntities = getInformedAlerts($alert['id'],$_REQUEST['filter_class'],$_REQUEST['filter_id']);
        if (sizeof($informedEntities) >0) {
                $informed = Array();
                $es = new transit_realtime\EntitySelector();
                if ($informedEntity['informed_class'] == "agency") {
                        $es->setAgencyId($informedEntity['informed_id']);
                }
                if ($informedEntity['informed_class'] == "stop") {
                        $es->setStopId($informedEntity['informed_id']);
                }
                if ($informedEntity['informed_class'] == "route") {
                        $es->setRouteId($informedEntity['informed_id']);
                }
                if ($informedEntity['informed_class'] == "trip") {
                        $td = new transit_realtime\TripDescriptor();
                                $td->setTripId($informedEntity['informed_id']);
                        $es->setTrip($td);
                }
                $alert-> addInformedEntity($es);
        }
                $alert->setCause(constant("transit_realtime\Alert\Cause::".$alert['cause']));
                $alert->setEffect(constant("transit_realtime\Alert\Effect::".$alert['effect']));
                $tsUrl = new transit_realtime\TranslatedString();
                        $tUrl = new transit_realtime\TranslatedString\Translation();
                                $tUrl->setText($alert['url']);
                                $tUrl->setLanguage("en");
                        $tsUrl->addTranslation($tUrl);
                $alert->setUrl($tsUrl);
                $tsHeaderText= new transit_realtime\TranslatedString();
                        $tHeaderText = new transit_realtime\TranslatedString\Translation();
                                $tHeaderText->setText($alert['header']);
                                $tHeaderText->setLanguage("en");
                        $tsHeaderText->addTranslation($tHeaderText);
                $alert->setHeaderText($tsHeaderText);
                $tsDescriptionText= new transit_realtime\TranslatedString();
                        $tDescriptionText = new transit_realtime\TranslatedString\Translation();
                                $tDescriptionText->setText($alert['description']);
                                $tDescriptionText->setLanguage("en");
                        $tsDescriptionText->addTranslation($tDescriptionText);
                $alert->setDescriptionText($tsDescriptionText);
        $fe->setAlert($alert);
$fm->addEntity($fe);
}
return $fm;
}
function getServiceAlertsAsArray($filter_class = "", $filter_id = "") {
        $codec = new DrSlump\Protobuf\Codec\PhpArray();
        return $codec->encode(getServiceAlerts($filter_class, $filter_id));
}
 
function getServiceAlertsAsBinary($filter_class = "", $filter_id = "") {
        $codec = new DrSlump\Protobuf\Codec\Binary();
        return $codec->encode(getServiceAlerts($filter_class, $filter_id));
}
 
function getServiceAlertsAsJSON($filter_class = "", $filter_id = "") {
        $codec = new DrSlump\Protobuf\Codec\Json();
        return $codec->encode(getServiceAlerts($filter_class, $filter_id));
}
function getServiceAlertsByClass() {
        $return = Array();
        $alerts = getServiceAlertsAsArray("","");
        foreach ($alerts['entities'] as $entity) {
                foreach ($entity['informed'] as $informed) {
                        foreach($informed as $key => $value){
                                if (strpos("_id",$key) > 0) {
                                        $parts = explode($key);
                                        $class = $parts[0];
                                        $id = $value;
                                }
                        }
                $return[$class][$id][] = $entity;
        }
        }
}
 
function getTripUpdates($filter_class = "", $filter_id = "") {
     $fm = new transit_realtime\FeedMessage();
$fh = new transit_realtime\FeedHeader();
$fh->setGtfsRealtimeVersion(1);
$fh->setTimestamp(time());
$fm->setHeader($fh);
foreach(getCurrentAlerts() as $alert) {
                        $informedEntities = getInformedAlerts($alert['id'],$_REQUEST['filter_class'],$_REQUEST['filter_id']);
        $stops = Array();
                $routestrips = Array();
                if (sizeof($informedEntities) >0) {
                if ($informedEntity['informed_class'] == "stop" && $informed["x-action"] == "remove") {
                        $stops[] = $informedEntity['informed_id'];
                }
                if (($informedEntity['informed_class'] == "route" || $informedEntity['informed_class'] == "trip") && $informed["x-action"] == "patch" ) {
                        $routestrips[] = Array( "id" => $informedEntity['informed_id'],
                        "type"=>$informedEntity['informed_class']);
                }
                }
foreach ($routestrips as $routetrip) {
$fe = new transit_realtime\FeedEntity();
        $fe->setId($alert['id'].$routetrip['id']);
        $fe->setIsDeleted(false);
        $tu = new transit_realtime\TripUpdate();        
                $td = new transit_realtime\TripDescriptor();
                if ($routetrip['type'] == "route") {
                        $td->setRouteId($routetrip['id']);
                        } else if ($routetrip['type'] == "trip") {
                                $td->setTripId($routetrip['id']);
                        }
                $tu->setTrip($td);
                foreach ($stops as $stop) {
                $stu = new transit_realtime\TripUpdate\StopTimeUpdate();
                                $stu->setStopId($stop);
                                $stu->setScheduleRelationship(transit_realtime\TripUpdate\StopTimeUpdate\ScheduleRelationship::SKIPPED);
                $tu->addStopTimeUpdate($stu);
        }
        $fe->setTripUpdate($tu);
$fm->addEntity($fe);
}               
 
}
return $fm;
        
}
function getTripUpdatesAsArray($filter_class = "", $filter_id = "") {
        $