<?php
function getStop($stopID)
 
{
     global $conn;
     $query = "Select * from stops where stop_id = :stopID LIMIT 1";
     debug($query, "database");
     $query = $conn -> prepare($query);
     $query -> bindParam(":stopID", $stopID);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetch(PDO :: FETCH_ASSOC);
    } 
function getStops($timingPointsOnly = false, $firstLetter = "", $startsWith = "")
 
{
     global $conn;
     $conditions = Array();
     if ($timingPointsOnly) $conditions[] = "substr(stop_code,1,2) != 'Wj'";
     if ($firstLetter != "") $conditions[] = "substr(stop_name,1,1) = :firstLetter";
     if ($startsWith != "") $conditions[] = "stop_name like :startsWith";
     $query = "Select * from stops";
     if (sizeof($conditions) > 0) {
        if (sizeof($conditions) > 1) {
            $query .= " Where " . implode(" AND ", $conditions) . " ";
             } 
        else {
            $query .= " Where " . $conditions[0] . " ";
             } 
        } 
    $query .= " order by stop_name;";
     $query = $conn -> prepare($query);
     if ($firstLetter != "") $query -> bindParam(":firstLetter", $firstLetter);
    
     if ($startsWith != "") {
        $startsWith = $startsWith . "%";
         $query -> bindParam(":startsWith", $startsWith);
         } 
    $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getNearbyStops($lat, $lng, $limit = "", $distance = 1000)
 
{
     if ($lat == null || $lng == null) return Array();
     if ($limit != "") $limitSQL = " LIMIT :limit ";
     global $conn;
     $query = "Select *, ST_Distance(position, ST_GeographyFromText('SRID=4326;POINT($lng $lat)'), FALSE) as distance
        from stops WHERE ST_DWithin(position, ST_GeographyFromText('SRID=4326;POINT($lng $lat)'), :distance, FALSE)
        order by distance $limitSQL;";
     debug($query, "database");
     $query = $conn -> prepare($query);
     $query -> bindParam(":distance", $distance);
     $query -> bindParam(":limit", $limit);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopsByName($name)
 
{
     global $conn;
     $query = "Select * from stops where stop_name LIKE :name;";
     debug($query, "database");
     $query = $conn -> prepare($query);
     $name = "%" . $name . ";%";
     $query -> bindParam(":name", $name);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopsBySuburb($suburb)
 
{
     global $conn;
     $query = "Select * from stops where zone_id LIKE :suburb order by stop_name;";
     debug($query, "database");
     $query = $conn -> prepare($query);
     $suburb = "%" . $suburb . ";%";
     $query -> bindParam(":suburb", $suburb);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopsByStopCode($stop_code, $startsWith = "")
 
{
     global $conn;
     $query = "Select * from stops where (stop_code = :stop_code OR stop_code LIKE :stop_code2)";
     if ($startsWith != "") $query .= " AND stop_name like :startsWith";
    
     debug($query, "database");
     $query = $conn -> prepare($query);
    
     $query -> bindParam(":stop_code", $stop_code);
     $stop_code2 = $stop_code . "%";
     $query -> bindParam(":stop_code2", $stop_code2);
     if ($startsWith != "") {
        $startsWith = $startsWith . "%";
         $query -> bindParam(":startsWith", $startsWith);
         } 
    $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopRoutes($stopID, $service_period)
 
{
     if ($service_period == "") $service_period = service_period();
     global $conn;
     $query = "SELECT distinct service_id,trips.route_id,route_short_name,route_long_name
FROM stop_times join trips on trips.trip_id =
stop_times.trip_id join routes on trips.route_id = routes.route_id WHERE stop_id = :stopID AND service_id=:service_period";
     debug($query, "database");
     $query = $conn -> prepare($query);
     $query -> bindParam(":service_period", $service_period);
     $query -> bindParam(":stopID", $stopID);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopTrips($stopID, $service_period = "", $afterTime = "", $limit = "")
 
{
     if ($service_period == "") $service_period = service_period();
     if ($limit != "") $limitSQL = " LIMIT :limit ";
     global $conn;
     if ($afterTime != "") {
        $query = " SELECT stop_times.trip_id,stop_times.arrival_time,stop_times.stop_id,stop_sequence,service_id,trips.route_id,route_short_name,route_long_name, end_times.arrival_time as end_time
FROM stop_times
join trips on trips.trip_id =
stop_times.trip_id
join routes on trips.route_id = routes.route_id , (SELECT trip_id,max(arrival_time) as arrival_time from stop_times
        WHERE stop_times.arrival_time IS NOT NULL group by trip_id) as end_times 
WHERE stop_times.stop_id = :stopID
AND stop_times.trip_id = end_times.trip_id
AND service_id=:service_period
AND end_times.arrival_time > :afterTime
ORDER BY end_time $limitSQL";
         } 
    else {
        $query = "SELECT stop_times.trip_id,arrival_time,stop_times.stop_id,stop_sequence,service_id,trips.route_id,route_short_name,route_long_name
FROM stop_times
join trips on trips.trip_id =
stop_times.trip_id
join routes on trips.route_id = routes.route_id
WHERE stop_times.stop_id = :stopID
AND service_id=:service_period
ORDER BY arrival_time $limitSQL";
         } 
    debug($query, "database");
     $query = $conn -> prepare($query);
     $query -> bindParam(":service_period", $service_period);
     $query -> bindParam(":stopID", $stopID);
     if ($limit != "") $query -> bindParam(":limit", $limit);
     if ($afterTime != "") $query -> bindParam(":afterTime", $afterTime);
     $query -> execute();
     if (!$query) {
        databaseError($conn -> errorInfo());
         return Array();
         } 
    return $query -> fetchAll();
    } 
function getStopTripsWithTimes($stopID, $time = "", $service_period = "", $time_range = "", $limit = "")
 
{
     if ($service_period == "") $service_period = service_period();
     if ($time_range == "") $time_range = (24 * 60 * 60);
     if ($time == "") $time = current_time();
     if ($limit == "") $limit = 10;
     $trips = getStopTrips($stopID, $service_period, $time);
     $timedTrips = Array();
     if ($trips && sizeof($trips) > 0) {
        foreach ($trips as $trip) {
            if ($trip['arrival_time'] != "") {
                if (strtotime($trip['arrival_time']) > strtotime($time) and strtotime($trip['arrival_time']) < (strtotime($time) + $time_range)) {
                    $timedTrips[] = $trip;
                     } 
                } 
            else {
                $timedTrip = getTimeInterpolatedTripAtStop($trip['trip_id'], $trip['stop_sequence']);
                 if ($timedTrip['arrival_time'] > $time and strtotime($timedTrip['arrival_time']) < (strtotime($time) + $time_range)) {
                    $timedTrips[] = $timedTrip;
                     } 
                } 
            if (sizeof($timedTrips) > $limit) break;
             } 
        sktimesort($timedTrips, "arrival_time", true);
         } 
    return $timedTrips;
    } 
?>