mirror of
https://github.com/ConnectedHumber/Air-Quality-Web
synced 2024-12-22 10:25:01 +00:00
96 lines
2.5 KiB
PHP
96 lines
2.5 KiB
PHP
<?php
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namespace AirQuality\Actions;
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use \SBRL\TomlConfig;
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use \SBRL\ResponseEncoder;
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use \AirQuality\Repositories\IDeviceRepository;
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use \AirQuality\ApiResponseSender;
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class ListDevices implements IAction {
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/** @var TomlConfig */
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private $settings;
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/** @var IDeviceRepository */
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private $device_repo;
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/** @var \SBRL\PerformanceCounter */
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private $perfcounter;
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/** @var ApiResponseSender */
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private $sender;
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public function __construct(
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TomlConfig $in_settings,
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IDeviceRepository $in_device_repo,
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ApiResponseSender $in_sender,
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\SBRL\PerformanceCounter $in_perfcounter) {
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$this->settings = $in_settings;
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$this->device_repo = $in_device_repo;
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$this->sender = $in_sender;
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$this->perfcounter = $in_perfcounter;
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}
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public function handle() : bool {
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global $start_time;
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// 1: Parse & validate parameters
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$only_with_location = !empty($_GET["only-with-location"]);
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$format = $_GET["format"] ?? "json";
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if(!in_array($format, ["json", "csv"])) {
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$this->sender->send_error_plain(406,
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"Error: The format '$format' isn't recognised. Valid formats: " . implode(", ", $format) . "."
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);
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exit;
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}
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// 2: Pull data from database
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$this->perfcounter->start("sql");
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$data = $this->device_repo->get_all_devices($only_with_location);
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$this->perfcounter->end("sql");
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// 2.5: Validate data from database
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if(empty($data)) {
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$this->sender->send_error_plain(404,
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"Error: No devices are currently present in the system.",
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[ "x-time-taken: ", $this->perfcounter->render() ]
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);
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return false;
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}
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// 3: Serialise data
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$this->perfcounter->start("encode");
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$response = null;
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$response_type = "application/octet-stream";
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$response_suggested_filename = "data-" . date(\DateTime::ATOM) . "";
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switch($format) {
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case "json":
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$response_type = "application/json";
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$response_suggested_filename .= ".json";
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$response = json_encode($data);
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break;
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case "csv":
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$response_type = "text/csv";
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$response_suggested_filename .= ".csv";
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$response = ResponseEncoder::encode_csv($data);
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break;
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}
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$this->perfcounter->end("encode");
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// 4: Send response
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// Don't a cache control header, because new devices might get added at any time
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// TODO: Investigate adding a short-term (~10mins?) cache-control header here
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header("content-length: " . strlen($response));
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header("content-type: $response_type");
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header("content-disposition: inline; filename=$response_suggested_filename");
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header("x-time-taken: " . $this->perfcounter->render());
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echo($response);
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return true;
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}
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}
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