New polygon field

src/Polygon.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Lassehaslev\NovaMapFields;
+
+class Polygon extends MapField
+{
+    /**
+     * Create a new field.
+     * And set default properties.
+     *
+     * @param string      $name
+     * @param string|null $attribute
+     * @param mixed|null  $resolveCallback
+     */
+    public function __construct($name, $attribute = null, $resolveCallback = null)
+    {
+        $this->help('Click on the map to create a new point. Drag a marker to change the point. When the map is selected, you can press [backspace] to remove markers.');
+
+        parent::__construct($name, $attribute = null, $resolveCallback);
+    }
+
+    /**
+     * Resolve the attribute before sending to frontend.
+     *
+     * @param mixed      $resource
+     * @param mixed|null $attribute
+     *
+     * @return array
+     */
+    public function resolveAttribute($resource, $attribute = null)
+    {
+        $value = $resource->{$attribute};
+
+        if (is_array($value)) {
+            return $value;
+        }
+
+        return json_decode($value);
+    }
+}