/
stops.php
55 lines (41 loc) · 1.73 KB
/
stops.php
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<?php
require '/opt/libapi/main.php';
//Config::set('DEBUG', 'FIRE');
header('Content-Type: application/json;charset=utf-8');
$mongo = new Mongo;
$mongo->{'tfl'}->{'stops'}->ensureIndex(array('Location' => '2d'));
list($lat1, $long1, $lat2, $long2) = explode(',', $_GET['points']);
$mybearing = bearing($lat1, $long1, $lat2, $long2);
$center = array('Latitude' => (($lat1 + $lat2) / 2), 'Longitude' => (($long1 + $long2) / 2));
$radius = sqrt(pow($lat1 - $lat2, 2) + pow($long1 - $long2, 2)) / 2;
$stops = $mongo->{'tfl'}->{'stops'}->find(array('Location' => array('$within' => array('$center' => array($center, $radius)))));
$routes = array();
foreach ($stops as $stop){
if (strpos($stop['Route'], 'N') !== 0)
$routes[$stop['Route']][$stop['Run']][(int) $stop['Order']] = array('Latitude' => $stop['Location']['Latitude'], 'Longitude' => $stop['Location']['Longitude']);
}
$items = array();
foreach ($routes as $route_id => $runs){
foreach ($runs as $run_id => $stops){
ksort($stops);
$first = array_slice($stops, 0, 1);
$last = array_slice($stops, -1, 1);
$bearing = bearing($first[0]['Latitude'], $first[0]['Longitude'], $last[0]['Latitude'], $last[0]['Longitude']);
$diff = sqrt(pow($bearing - $mybearing, 2));
if ($diff > 45)
continue;
$items[$route_id] = $stops;
}
}
ksort($items);
print json_encode(array(
'center' => $center,
'radius' => $radius,
'stops' => $items,
));
function bearing($lat1, $long1, $lat2, $long2){
$args = func_get_args();
list($lat1, $long1, $lat2, $long2) = array_map('deg2rad', $args);
$bearing = rad2deg(atan2(asin($long2-$long1)*cos($lat2),cos($lat1)*sin($lat2) - sin($lat1)*cos($lat2)*cos($long2-$long1)));
return $bearing < 0 ? 360 + $bearing : $bearing;
}