feat: refactor cart and bundle handling to support Buyable interface for improved flexibility

app/Domains/Purchase/Resources/PurchaseItemResource.php

@@ -17,26 +17,30 @@ class PurchaseItemResource extends JsonResource
      */
     public function toArray(Request $request): array
     {
-        $variant = $this->variant;
-        $product = $variant?->product;
+        /** @var \App\Domains\Shared\Contracts\Buyable|null $buyable */
+        $buyable = $this->buyable;
         $quantity = (int) ($this->cantidad ?? 0);
         $unitPrice = $this->resolveUnitPrice();
         $lineTotal = $this->resolveLineTotal($unitPrice, $quantity);
 
+        $imageUrl = null;
+        $attributes = [];
+        if ($this->buyable_type === 'variant' && $buyable) {
+            $imageUrl = $this->resolveImageUrl($buyable);
+            $attributes = $this->resolveAttributes($buyable);
+        }
+
         return [
             'id' => $this->id,
             'quantity' => $quantity,
             'unit_price' => $this->formatMoney($unitPrice),
             'line_total' => $this->formatMoney($lineTotal),
-            'product' => $product === null ? null : [
-                'id' => $product->id,
-                'nombre' => $product->nombre,
-                'slug' => $product->slug,
-                'imagen' => $this->resolveImageUrl(),
-            ],
-            'variant' => $variant === null ? null : [
-                'id' => $variant->id,
-                'attributes' => $this->resolveAttributes(),
+            'buyable_type' => $this->buyable_type,
+            'buyable_id' => $this->buyable_id,
+            'item_details' => $buyable === null ? null : [
+                'nombre' => $buyable->getName(),
+                'imagen' => $imageUrl,
+                'attributes' => $attributes,
             ],
         ];
     }
@@ -48,7 +52,7 @@ class PurchaseItemResource extends JsonResource
         }
 
         if ($this->resource instanceof CartItem) {
-            return (float) ($this->variant?->product?->precio ?? 0);
+            return (float) ($this->buyable?->getPrice() ?? 0);
         }
 
         return 0.0;
@@ -63,15 +67,13 @@ class PurchaseItemResource extends JsonResource
         return $unitPrice * $quantity;
     }
 
-    protected function resolveImageUrl(): ?string
+    protected function resolveImageUrl($buyable): ?string
     {
-        $variant = $this->variant;
-
-        if ($variant === null || ! $variant->relationLoaded('attachments')) {
+        if (! $buyable->relationLoaded('attachments')) {
             return null;
         }
 
-        $attachment = $variant->attachments->first();
+        $attachment = $buyable->attachments->first();
 
         if ($attachment === null) {
             return null;
@@ -83,15 +85,13 @@ class PurchaseItemResource extends JsonResource
     /**
      * @return array<int, array{name: string, value: mixed}>
      */
-    protected function resolveAttributes(): array
+    protected function resolveAttributes($buyable): array
     {
-        $variant = $this->variant;
-
-        if ($variant === null || ! $variant->relationLoaded('definitions')) {
+        if (! $buyable->relationLoaded('definitions')) {
             return [];
         }
 
-        return $variant->definitions
+        return $buyable->definitions
             ->map(function ($definition): array {
                 return [
                     'name' => (string) ($definition->productAttribute?->attribute?->nombre ?? ''),