<?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 $query->fetchAll();
}
function getStopsBySuburb($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;
}
?>