/**
* Calculates the distance to travel from origin to destination using thier respective co-ordinates.
* This function makes use of the Google Maps Distance Matrix API and requires a valid Server API key.
*
* @param App\Location $origin The origin, for this project it should be the co-ordinates of the event
* @param App\Location $destination The destination, as above
* @return int The distance returned by the Google Maps Distance Matrix API
*/
public static function getMapsMatrixDistance($origin, $destination)
{
//Try to get Distance from Google Distance Matrix API
$response = file_get_contents('https://maps.googleapis.com/maps/api/distancematrix/json?origins=' . $origin->longitude . ',' . $origin->latitude . '&destinations=' . $destination->longitude . ',' . $destination->latitude . '&key=' . env('GOOGLE_API_KEY'));
$response = json_decode($response, true, 512);
//WOO Debug code! Documenting my approach tbh
//If we're all cool with the functional code, I'll get rid of these comments
//
// var_dump($response);
// var_dump($response["rows"][0]["elements"][0]["distance"]["value"]);
//echo ($response["rows"][0]["elements"][0]["distance"]["value"] == '' ? 'empty' : 'not empty');
//if( isset($response["rows"][0]["elements"][0]["distance"]["value"]) ){echo 'not empty';} else {echo 'empty';}
//If response contains zero results call getDistance instead
//This will only happen (I think) when Google can't find a route between the two points
//Or on an invalid request
if (isset($response["rows"][0]["elements"][0]["distance"]["value"])) {
return $response["rows"][0]["elements"][0]["distance"]["value"];
} else {
return LocationController::getDistance($origin, $destination);
}
}
