improve "free" products

Author: Boy132

billing/src/Filament/App/Widgets/ProductWidget.php

@@ -2,6 +2,7 @@
 
 namespace Boy132\Billing\Filament\App\Widgets;
 
+use App\Filament\Server\Pages\Console;
 use Boy132\Billing\Models\Customer;
 use Boy132\Billing\Models\Order;
 use Boy132\Billing\Models\Product;
@@ -47,6 +48,13 @@ public function content(Schema $schema): Schema
                         'product_price_id' => $price->id,
                     ]);
 
+                    if ($price->isFree()) {
+                        $order->activate(null);
+                        $order->refresh();
+
+                        return redirect(Console::getUrl(panel: 'server', tenant: $order->server));
+                    }
+
                     return $this->redirect($order->getCheckoutSession()->url);
                 });
         }

billing/src/Models/ProductPrice.php

@@ -89,8 +89,17 @@ public function sync(): void
         }
     }
 
+    public function isFree(): bool
+    {
+        return !$this->cost;
+    }
+
     public function formatCost(): string
     {
+        if ($this->isFree()) {
+            return 'Free';
+        }
+
         $formatter = new NumberFormatter(user()->language ?? 'en', NumberFormatter::CURRENCY);
 
         return $formatter->formatCurrency($this->cost, config('billing.currency'));