first commit

app/Models/Approval.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Approval extends Model
+{
+    protected $casts = [
+        'metadata' => 'array',
+        'step' => ApprovalStep::class
+    ];
+    
+    public function transitionTo($status, $comment = null)
+    {
+        $this->update([
+            'status' => $status,
+            'comment' => $comment,
+            'completed_at' => now()
+        ]);
+        
+        $this->document->notifyApprovers();
+    }
+}