Air-Quality-Web/logic/Actions/ListDevicesNear.php

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<?php
namespace AirQuality\Actions;
use \SBRL\TomlConfig;
use \AirQuality\Repositories\IDeviceRepository;
use \AirQuality\Repositories\IMeasurementTypeRepository;
use \AirQuality\ApiResponseSender;
use \AirQuality\Validator;
/**
* Action that lists the devices near a given location.
*/
class ListDevicesNear implements IAction {
/** @var TomlConfig */
private $settings;
/** @var \SBRL\PerformanceCounter */
private $perfcounter;
/** @var IDeviceRepository */
private $device_repo;
/** @var IMeasurementTypeRepository */
private $type_repo;
/** @var ApiResponseSender */
private $sender;
/** @var Validator */
private $validator_get;
/** @var Validator */
private $validator_post;
public function __construct(
TomlConfig $in_settings,
IDeviceRepository $in_device_repo,
ApiResponseSender $in_sender,
\SBRL\PerformanceCounter $in_perfcounter) {
$this->settings = $in_settings;
$this->device_repo = $in_device_repo;
$this->sender = $in_sender;
$this->perfcounter = $in_perfcounter;
$this->validator_get = new Validator($_GET);
$this->validator_post = new Validator($_POST);
}
public function handle() : bool {
global $start_time;
if(strtolower($_SERVER["REQUEST_METHOD"]) !== "post") {
$this->sender->send_error_plain(405, "Error: The devices-near action only takes a POST request, but you sent a {$_SERVER["REQUEST_METHOD"]} request. The parameters 'longitude' and 'latitude' should be specified in the POST body, and 'count' as a regular GET parameter.\nExample POST body (without quotes): 'latitude=12.345678&longitude=98.765432'\nDon't forget that the content-type header should be set to 'application/x-www-form-urlencoded'.", [
[ "x-time-taken", $this->perfcounter->render() ]
]);
return false;
}
// 1: Validate params
$this->validator_get->is_numberish("count");
$this->validator_get->run();
$this->validator_post->is_numberish("latitude");
$this->validator_post->is_numberish("longitude");
$this->validator_post->run();
// 2: Pull data from database
$this->perfcounter->start("sql");
$data = $this->device_repo->get_near_location(
floatval($_POST["latitude"]),
floatval($_POST["longitude"]),
intval($_GET["count"])
);
$this->perfcounter->end("sql");
// 3: Serialise data
$this->perfcounter->start("encode");
$response = json_encode($data);
$this->perfcounter->end("encode");
// 4: Send response
// Send a cache-control header, but only in production mode
// FUTURE: Move last-seen to a different API call if caching becomes critically important?
if($this->settings->get("env.mode") == "production") {
header("cache-control: public, max-age=" . $this->settings->get("cache.max-age-supershort"));
}
header("content-length: " . strlen($response));
header("content-type: application/json");
header("x-time-taken: " . $this->perfcounter->render());
echo($response);
return true;
}
}