<?php
function getStop($stopID)
{
        global $conn;
        $query = "Select * from stops where stop_id = '$stopID' LIMIT 1";
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_assoc($result);
}
function getStops($timingPointsOnly = false, $firstLetter = "")
{
        global $conn;
        $conditions = Array();
        if ($timingPointsOnly) $conditions[] = "substr(stop_code,1,2) != 'Wj'";
        if ($firstLetter != "") $conditions[] = "substr(stop_name,1,1) = '$firstLetter'";
        $query = "Select * from stops";
        if (sizeof($conditions) > 0) {
                if (sizeof($conditions) > 1) {
                        $query.= " Where " . implode(" AND ", $conditions) . " ";
                }
                else {
                        $query.= " Where " . $conditions[0] . " ";
                }
        }
        $query.= " order by stop_name;";
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_all($result);
}
function getNearbyStops($lat, $lng, $limit = "", $distance = 1000)
{
        if ($lat == null || $lng == null) return Array();
        if ($limit != "") $limit = " 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 $limit;";
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_all($result);
}
function getStopsBySuburb($suburb)
{
        global $conn;
        $query = "Select * from stops where zone_id LIKE '%$suburb;%' order by stop_name;";
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_all($result);
}
function getStopRoutes($stopID, $service_period)
{
        if ($service_period == "") $service_period = service_period();
        global $conn;
        $query = "SELECT service_id,trips.route_id,route_short_name,route_long_name
FROM stop_times join trips on trips.trip_id =
stop_times.trip_id join routes on trips.route_id = routes.route_id WHERE stop_id = '$stopID' AND service_id='$service_period'";
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_all($result);
}
function getStopTrips($stopID, $service_period = "", $afterTime = "")
{
        if ($service_period == "") $service_period = service_period();
        $afterCondition = "AND arrival_time > '$afterTime'";
        global $conn;
        if ($afterTime != "") {
                $query = " SELECT stop_times.trip_id,stop_times.arrival_time,stop_times.stop_id,stop_sequence,service_id,trips.route_id,route_short_name,route_long_name, start_times.arrival_time as start_time
FROM stop_times
join trips on trips.trip_id =
stop_times.trip_id
join routes on trips.route_id = routes.route_id , (SELECT trip_id,arrival_time from stop_times
        WHERE stop_times.arrival_time IS NOT NULL
        AND stop_sequence = '1') as start_times 
WHERE stop_times.stop_id = '$stopID'
AND stop_times.trip_id = start_times.trip_id
AND service_id='$service_period'
AND start_times.arrival_time > '$afterTime'
ORDER BY start_time";
        }
        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='$service_period'
ORDER BY arrival_time";
        }
        debug($query, "database");
        $result = pg_query($conn, $query);
        if (!$result) {
                databaseError(pg_result_error($result));
                return Array();
        }
        return pg_fetch_all($result);
}
function getStopTripsWithTimes($stopID, $time = "", $service_period = "", $time_range = "")
{
        if ($service_period == "") $service_period = service_period();
        if ($time_range == "") $time_range = (24 * 60 * 60);
        if ($time == "") $time = ($_SESSION['time'] ? $_SESSION['time'] : date("H:i:s"));
        if ($limit == "") $limit = 10;
        $trips = getStopTrips($stopID, $service_period, $time);
        $timedTrips = Array();
        foreach ($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;
}
?>