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Add METAR interface and use local library for decoding

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This commit is contained in:
Nabeel Shahzad
2018-04-02 22:35:25 -05:00
parent 3dba586f83
commit 717118cfb4
16 changed files with 425 additions and 161 deletions
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13
app/Interfaces/Metar.php Normal file
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<?php
namespace App\Interfaces;
abstract class Metar
{
/**
* Implement the METAR- Return the string
* @param $icao
* @return mixed
*/
abstract public function get($icao);
}

31
app/Services/Metar/AviationWeather.php Normal file
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<?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;
}
}

51
app/Support/Units/Temperature.php Normal file
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<?php
namespace App\Support\Units;
use Illuminate\Contracts\Support\Arrayable;
/**
* Wrap the converter class
* @package App\Support\Units
*/
class Temperature extends \PhpUnitsOfMeasure\PhysicalQuantity\Temperature implements Arrayable
{
/**
* @return string
*/
public function __toString()
{
$unit = strtoupper(setting('units.temperature'));
$value = $this->toUnit($unit);
return (string) round($value, 2);
}
/**
* Return value in native unit as integer
* @return array
*/
public function toNumber()
{
return $this->toArray();
}
/**
* For the HTTP Resource call
*/
public function toObject()
{
return [
'f' => round($this->toUnit('F'), 2),
'c' => round($this->toUnit('C') / 1000, 2),
];
}
/**
* Get the instance as an array.
*/
public function toArray()
{
return $this->__toString();
}
}

59
app/Widgets/CheckWx.php
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<?php
namespace App\Widgets;
use App\Interfaces\Widget;
use App\Support\Http;
use Illuminate\Support\Facades\Cache;
/**
* This is a widget for the 3rd party CheckWX service
* @package App\Widgets
*/
class CheckWx extends Widget
{
protected $config = [
'icao' => null,
];
/**
* Attempt to get the data from the CheckWX API
*/
public function run()
{
if (!config('checkwx.api_key')) {
$data = null;
} else {
// Cache the request so we don't need to repeatedly call out
$cache = config('cache.keys.WEATHER_LOOKUP');
$key = $cache['key'].$this->config['icao'];
$data = Cache::remember($key, $cache['time'], function () {
$url = config('checkwx.url').'/metar/'.$this->config['icao'].'/decoded';
$data = Http::get($url, [
'headers' => [
'X-API-Key' => config('checkwx.api_key'),
'content-type' => 'application/json',
]
]);
$data = json_decode($data);
return $data;
});
if($data->results === 1) {
$data = $data->data[0];
} else {
$data = null;
}
}
return view('widgets.check_wx', [
'config' => $this->config,
'data' => $data,
'unit_alt' => setting('units.altitude'),
'unit_dist' => setting('units.distance'),
'unit_temp' => setting('units.temperature'),
]);
}
}

84
app/Widgets/Weather.php Normal file
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<?php
namespace App\Widgets;
use App\Interfaces\Widget;
use App\Support\Http;
use App\Support\Units\Distance;
use App\Support\Units\Temperature;
use Illuminate\Support\Facades\Cache;
use MetarDecoder\MetarDecoder;
use SimpleXMLElement;
/**
* This is a widget for the 3rd party CheckWX service
* @package App\Widgets
*/
class Weather extends Widget
{
protected $config = [
'icao' => null,
];
public const URL = 'https://avwx.rest/api/metar/';
/**
* Determine the category depending on the rules for visibility/ceiling
* https://www.aviationweather.gov/cva/help
* @param $metar
* @return string
*/
protected function determineCategory($metar): string
{
$category = 'VFR';
$visibility = $metar->getVisibility()->getVisibility()->getValue();
$ceiling = $metar->getClouds();
if ($ceiling) {
$ceiling = $ceiling[0]->getBaseHeight()->getValue();
} else {
$ceiling = 1000;
}
if ($visibility < 3 || $ceiling < 1000) {
$category = 'IFR';
}
return $category;
}
/**
* Attempt to get the data from the CheckWX API
*/
public function run()
{
// Cache the request so we don't need to repeatedly call out
$cache = config('cache.keys.WEATHER_LOOKUP');
$key = $cache['key'].$this->config['icao'];
$raw_metar = Cache::remember($key, $cache['time'], function () {
/**
* @var \App\Interfaces\Metar $klass
*/
$klass = config('phpvms.metar');
$metar_class = new $klass;
return $metar_class->get($this->config['icao']);
});
// Run through this parser
$decoder = new MetarDecoder();
$metar = $decoder->parse($raw_metar);
// Determine the flight category that's allowed
// Just check if we need to be under IFR conditions
$category = $this->determineCategory($metar);
return view('widgets.weather', [
'config' => $this->config,
'category' => $category,
'metar' => $metar,
'unit_alt' => setting('units.altitude'),
'unit_dist' => setting('units.distance'),
'unit_temp' => setting('units.temperature'),
]);
}
}