Merge pull request #25 from square/l7

Separate integration for L7

Author: khepin

src/Integrations/Laravel7/JsonCastable.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace Square\Pjson\Integrations\Laravel7;
+
+trait JsonCastable
+{
+    public static function castUsing()
+    {
+        return new JsonCaster(static::class);
+    }
+}

src/Integrations/Laravel7/JsonCaster.php

@@ -0,0 +1,27 @@
+<?php declare(strict_types=1);
+
+namespace Square\Pjson\Integrations\Laravel7;
+
+use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
+
+class JsonCaster implements CastsAttributes
+{
+    public function __construct(
+        protected string $target
+    ) {
+    }
+
+    public function get($model, $key, $value, $attributes)
+    {
+        if ($value === null || $value === '') {
+            return $value;
+        }
+
+        return $this->target::fromJsonString($value);
+    }
+
+    public function set($model, $key, $value, $attributes)
+    {
+        return $value?->toJson();
+    }
+}