public function test_bounding_box_for_radius()
{
// Helsinki-Malmi airport (EFHF)
$efhf = new midgardmvc_helper_location_spot(60.254558, 25.042828);
// Get 20km bounding box
$bbox = midgardmvc_helper_location_utils::get_bounding_box_for_radius($efhf, 20);
$this->assertTrue(is_array($bbox));
$this->assertEquals(count($bbox), 2);
// Ensure the box limits are in right directions
$this->assertEquals(midgardmvc_helper_location_utils::get_bearing($efhf, $bbox[0]), 'SW');
$this->assertEquals(midgardmvc_helper_location_utils::get_bearing($efhf, $bbox[1]), 'NE');
// Check that the distance to a corner is correct.
// Note: using 2D trigonometry on 3D globe so numbers are not exact
$distance1 = midgardmvc_helper_location_utils::get_distance($bbox[0], $efhf);
$this->assertEquals(round($distance1), round(sqrt(pow(20, 2) + pow(20, 2))));
}
/**
* Get closest items
*
* @param string $class MidCOM DBA class to query
* @param midgardmvc_helper_location_spot $spot Center position
* @param integer $limit How many results to return
* @return Array Array of MidCOM DBA objects sorted by proximity
*/
static function get_closest($class, midgardmvc_helper_location_spot $spot, $limit, $modifier = 0.15)
{
$classname = midgardmvc_helper_location_utils::get_positioning_class($class);
if ($classname != $class) {
$direct = false;
} else {
$direct = true;
}
$qb = new midgard_query_builder($classname);
if (!$direct) {
// We're querying a regular DBA object through a location object
$qb->add_constraint('parentclass', '=', $class);
}
static $rounds = 0;
$rounds++;
$from['latitude'] = $spot->latitude + $modifier;
if ($from['latitude'] > 90) {
$from['latitude'] = 90;
}
$from['longitude'] = $spot->longitude - $modifier;
if ($from['longitude'] < -180) {
$from['longitude'] = -180;
}
$to['latitude'] = $spot->latitude - $modifier;
if ($to['latitude'] < -90) {
$to['latitude'] = -90;
}
$to['longitude'] = $spot->longitude + $modifier;
if ($to['longitude'] > 180) {
$to['longitude'] = 180;
}
if (!isset($current_locale)) {
$current_locale = setlocale(LC_NUMERIC, '0');
setlocale(LC_NUMERIC, 'C');
}
$qb->begin_group('AND');
$qb->add_constraint('latitude', '<', (double) $from['latitude']);
$qb->add_constraint('latitude', '>', (double) $to['latitude']);
$qb->end_group();
$qb->begin_group('AND');
$qb->add_constraint('longitude', '>', (double) $from['longitude']);
$qb->add_constraint('longitude', '<', (double) $to['longitude']);
$qb->end_group();
$result_count = $qb->count();
//echo "<br />Round {$rounds}, lat1 {$from['latitude']} lon1 {$from['longitude']}, lat2 {$to['latitude']} lon2 {$to['longitude']}: {$result_count} results\n";
if ($result_count < $limit) {
if ($from['latitude'] == 90 && $from['longitude'] == -180 && $to['latitude'] == -90 && $to['longitude'] == 180) {
// We've queried the entire globe so we return whatever we got
$results = $qb->execute();
$closest = array();
foreach ($results as $result) {
$result_spot = new midgardmvc_helper_location_spot($result);
$distance = sprintf("%05d", round(midgardmvc_helper_location_utils::get_distance($spot, $result_spot)));
if (!$direct) {
// Instantiate the real object as the result
$result = new $class($result->parent);
$result->spot = $result_spot;
$result->latitude = $result_spot->latitude;
$result->longitude = $result_spot->longitude;
}
$closest[$distance . $result->guid] = $result;
}
ksort($closest);
reset($closest);
return $closest;
}
$modifier = $modifier * 1.05;
setlocale(LC_NUMERIC, $current_locale);
return midgardmvc_helper_location_utils::get_closest($class, $spot, $limit, $modifier);
}
$results = $qb->execute();
$closest = array();
foreach ($results as $result) {
$result_spot = new midgardmvc_helper_location_spot($result);
$distance = sprintf("%05d", round(midgardmvc_helper_location_utils::get_distance($spot, $result_spot)));
if (!$direct) {
// Instantiate the real object as the result
$result = new $class($result->parent);
$result->spot = $result_spot;
$result->latitude = $result_spot->latitude;
$result->longitude = $result_spot->longitude;
}
$closest[$distance . $result->guid] = $result;
}
ksort($closest);
reset($closest);
while (count($closest) > $limit) {
array_pop($closest);
}
setlocale(LC_NUMERIC, $current_locale);
return $closest;
}