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

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2019-01-17 15:39:50 +00:00
<?php
namespace AirQuality\Actions;
use \SBRL\TomlConfig;
use \AirQuality\Repositories\IDeviceRepository;
use \AirQuality\ApiResponseSender;
use \AirQuality\Validator;
use \AirQuality\PerfFormatter;
class ListDevices implements IAction {
/** @var TomlConfig */
private $settings;
/** @var IDeviceRepository */
private $device_repo;
/** @var ApiResponseSender */
private $sender;
public function __construct(
TomlConfig $in_settings,
IDeviceRepository $in_device_repo,
ApiResponseSender $in_sender) {
$this->settings = $in_settings;
$this->device_repo = $in_device_repo;
$this->sender = $in_sender;
}
public function handle() : bool {
global $start_time;
$start_handle = microtime(true);
// 1: Parse & validate parameters
$only_with_location = !empty($_GET["only_with_location"]);
// 1: Pull data from database
$data = $this->device_repo->get_all_devices($only_with_location);
// 1.5: Validate data from database
if(empty($data)) {
http_response_code(404);
header("content-type: text/plain");
header("x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, null));
echo("Error: No devices are currently present in the system.");
return false;
}
// 3: Serialise data
$start_encode = microtime(true);
$response = json_encode($data);
// 4: Send response
// Don't a cache control header, because new devices might get added at any time
// TODO: Investigate adding a short-term (~10mins?) cache-control header here
header("content-length: " . strlen($response));
header("content-type: application/json");
header("x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, $start_encode));
echo($response);
return true;
}
}