feat: add total field to purchases and update related logic for payment processing

database/migrations/2026_07_07_100000_add_total_to_compras_table.php

@@ -0,0 +1,59 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('compras', function (Blueprint $table) {
+            $table->decimal('total', 10, 2)->default(0)->after('payment_method');
+        });
+
+        DB::table('compras')
+            ->orderBy('id')
+            ->chunkById(100, function ($compras): void {
+                foreach ($compras as $compra) {
+                    $itemsQuery = DB::table('compra_items')
+                        ->where('compra_id', $compra->id);
+                    $hasItems = $itemsQuery->exists();
+                    $itemsTotal = $itemsQuery->sum('total');
+
+                    $total = (float) $itemsTotal;
+
+                    if (! $hasItems && $compra->cart_id !== null) {
+                        $cartTotal = DB::table('carrito_items as carrito_item')
+                            ->join('productos_variantes as variante', 'variante.id', '=', 'carrito_item.producto_variante_id')
+                            ->join('productos as producto', 'producto.id', '=', 'variante.producto_id')
+                            ->where('carrito_item.cart_id', $compra->cart_id)
+                            ->selectRaw('COALESCE(SUM(producto.precio * carrito_item.cantidad), 0) as total')
+                            ->value('total');
+
+                        $total = (float) ($cartTotal ?? 0);
+                    }
+
+                    DB::table('compras')
+                        ->where('id', $compra->id)
+                        ->update([
+                            'total' => number_format($total, 2, '.', ''),
+                        ]);
+                }
+            });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('compras', function (Blueprint $table) {
+            $table->dropColumn('total');
+        });
+    }
+};