Version 2.0

app/Models/Contract.php

@@ -7,9 +7,30 @@ use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
-#[Fillable(['product_id', 'customer_id', 'type', 'start_date', 'end_date', 'status', 'printed_at', 'signed_status'])]
+#[Fillable(['product_id', 'customer_id', 'type', 'category', 'start_date', 'end_date', 'status', 'printed_at', 'signed_status', 'representative_name', 'representative_phone', 'representative_email'])]
 class Contract extends Model
 {
+    protected static function booted(): void
+    {
+        static::saving(function (self $contract) {
+            if ($contract->status === 'active') {
+                $exists = self::where('product_id', $contract->product_id)
+                    ->where('category', $contract->category)
+                    ->where('status', 'active')
+                    ->when($contract->exists, fn ($q) => $q->where('id', '!=', $contract->id))
+                    ->exists();
+
+                if ($exists) {
+                    throw new \RuntimeException(
+                        __('feedback.contract_duplicate_body', [
+                            'product' => $contract->product?->name ?? $contract->product_id,
+                            'customer' => $contract->customer?->name ?? '?',
+                        ])
+                    );
+                }
+            }
+        });
+    }
     protected function casts(): array
     {
         return [