Add METAR interface and use local library for decoding

app/Services/Metar/AviationWeather.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Services\Metar;
+
+use App\Interfaces\Metar;
+use App\Support\Http;
+
+/**
+ * Return the raw METAR string from the NOAA Aviation Weather Service
+ * @package App\Services\Metar
+ */
+class AviationWeather extends Metar
+{
+    private const URL =
+        'https://www.aviationweather.gov/adds/dataserver_current/httpparam?'
+        .'dataSource=metars&requestType=retrieve&format=xml&hoursBeforeNow=3'
+        .'&mostRecent=true&fields=raw_text&stationString=';
+
+    /**
+     * Implement the METAR- Return the string
+     * @param $icao
+     * @return mixed
+     */
+    public function get($icao)
+    {
+        $url = static::URL.$icao;
+        $res = Http::get($url, []);
+        $xml = simplexml_load_string($res);
+        return $xml->data->METAR->raw_text;
+    }
+}