128 lines
3.2 KiB
PHP
128 lines
3.2 KiB
PHP
<?php
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namespace App\Services\Metar;
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use App\Contracts\Metar;
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use App\Support\HttpClient;
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use function count;
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use Exception;
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use Illuminate\Support\Facades\Log;
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/**
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* Return the raw METAR/TAF string from the NOAA Aviation Weather Service
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*/
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class AviationWeather extends Metar
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{
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private const METAR_URL =
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'https://www.aviationweather.gov/adds/dataserver_current/httpparam?dataSource=metars&requestType=retrieve&format=xml&hoursBeforeNow=3&mostRecent=true&stationString=';
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private const TAF_URL =
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'https://www.aviationweather.gov/adds/dataserver_current/httpparam?dataSource=tafs&requestType=retrieve&format=xml&hoursBeforeNow=3&mostRecent=true&stationString=';
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private $httpClient;
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public function __construct(HttpClient $httpClient)
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{
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$this->httpClient = $httpClient;
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}
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/**
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* Implement the METAR - Return the string
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*
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* @param $icao
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*
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* @throws \Exception
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* @throws \GuzzleHttp\Exception\GuzzleException
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*
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* @return string
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*/
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protected function get_metar($icao): string
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{
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if ($icao === '') {
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return '';
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}
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$url = static::METAR_URL.$icao;
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try {
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$res = $this->httpClient->get($url, []);
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$xml = simplexml_load_string($res);
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if ($xml->errors && count($xml->errors->children()) > 0) {
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return '';
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}
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$attrs = $xml->data->attributes();
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if (!isset($attrs['num_results'])) {
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return '';
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}
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$num_results = $attrs['num_results'];
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if (empty($num_results)) {
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return '';
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}
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$num_results = (int) $num_results;
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if ($num_results === 0) {
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return '';
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}
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if (count($xml->data->METAR->raw_text) === 0) {
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return '';
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}
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return $xml->data->METAR->raw_text->__toString();
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} catch (Exception $e) {
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Log::error('Error reading METAR: '.$e->getMessage());
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return '';
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}
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}
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/**
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* Do the actual retrieval of the TAF
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*
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* @param $icao
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*
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* @throws \GuzzleHttp\Exception\GuzzleException
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*
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* @return string
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*/
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protected function get_taf($icao): string
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{
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if ($icao === '') {
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return '';
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}
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$tafurl = static::TAF_URL.$icao;
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try {
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$tafres = $this->httpClient->get($tafurl, []);
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$tafxml = simplexml_load_string($tafres);
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$tafattrs = $tafxml->data->attributes();
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if (!isset($tafattrs['num_results'])) {
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return '';
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}
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$tafnum_results = $tafattrs['num_results'];
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if (empty($tafnum_results)) {
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return '';
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}
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$tafnum_results = (int) $tafnum_results;
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if ($tafnum_results === 0) {
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return '';
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}
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if (count($tafxml->data->TAF->raw_text) === 0) {
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return '';
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}
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return $tafxml->data->TAF->raw_text->__toString();
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} catch (Exception $e) {
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Log::error('Error reading TAF: '.$e->getMessage());
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return '';
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}
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}
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}
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