*** Backup Mirror *** The web interface and JSON api for the ConnectedHumber Air Quality Monitoring Project. https://github.com/ConnectedHumber/Air-Quality-Web
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Air-Quality-Web/logic/Actions/ListDevices.php

91 lines
2.4 KiB

<?php
namespace AirQuality\Actions;
use \SBRL\TomlConfig;
use \SBRL\ResponseEncoder;
use \AirQuality\Repositories\IDeviceRepository;
use \AirQuality\ApiResponseSender;
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"]);
$format = $_GET["format"] ?? "json";
if(!in_array($format, ["json", "csv"])) {
$this->sender->send_error_plain(406,
"Error: The format '$format' isn't recognised. Valid formats: " . implode(", ", $format) . "."
);
exit;
}
// 2: Pull data from database
$data = $this->device_repo->get_all_devices($only_with_location);
// 2.5: Validate data from database
if(empty($data)) {
$this->sender->send_error_plain(404,
"Error: No devices are currently present in the system.",
[ "x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, null) ]
);
return false;
}
// 3: Serialise data
$start_encode = microtime(true);
$response = null;
$response_type = "application/octet-stream";
$response_suggested_filename = "data-" . date(\DateTime::ATOM) . "";
switch($format) {
case "json":
$response_type = "application/json";
$response_suggested_filename .= ".json";
$response = json_encode($data);
break;
case "csv":
$response_type = "text/csv";
$response_suggested_filename .= ".csv";
$response = ResponseEncoder::encode_csv($data);
break;
}
// 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: $response_type");
header("content-disposition: inline; filename=$response_suggested_filename");
header("x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, $start_encode));
echo($response);
return true;
}
}