Change volume units to be in lbs/kg closes #193

app/Support/Units/Fuel.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Support\Units;
+use Illuminate\Contracts\Support\Arrayable;
+
+/**
+ * Class Mass
+ * @package App\Support\Units
+ */
+class Fuel extends \PhpUnitsOfMeasure\PhysicalQuantity\Mass implements Arrayable
+{
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        $unit = setting('general.fuel_unit');
+        $value = $this->toUnit($unit);
+        return (string) round($value, 2);
+    }
+
+    /**
+     * Return value in native unit as integer
+     * @return array
+     */
+    public function toInt()
+    {
+        return $this->toArray();
+    }
+
+    /**
+     * For the HTTP Resource call
+     */
+    public function toObject()
+    {
+        return [
+            'kg' => round($this->toUnit('kg'), 2),
+            'lbs' => round($this->toUnit('lbs'), 2),
+        ];
+    }
+
+    /**
+     * Get the instance as an array.
+     * @return array
+     */
+    public function toArray()
+    {
+        return round($this->toUnit(
+            config('phpvms.internal_units.fuel')
+        ), 2);
+    }
+}