Backend: Purchase

app/Http/Controllers/PurchaseController.php

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+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Purchase;
+use Illuminate\Http\Request;
+use App\Models\Customer;
+
+class PurchaseController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        $purchases = Purchase::get();
+        return $purchases->toJson();
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        //
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        $data = $request->validate([
+            'customer_id' => 'required',
+            'amount' => 'nullable',
+        ]);
+
+        Purchase::create([
+            'customer_id' => $data['customer_id'],
+            'amount' => $data['amount'],
+        ]);
+
+        $customer = Customer::findOrFail( $data['customer_id'] );
+        $customer->amount_left =  $customer->amount_left - $data['amount'];
+        $customer->save();
+
+        return redirect('customer/' . $customer->id);
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Purchase $purchase)
+    {
+        //
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(Purchase $purchase)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Purchase $purchase)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy($id)
+    {
+        $purchase = Purchase::findOrFail( $id );
+        $customer = Customer::where('id', $purchase->customer_id);
+        $customer->amount_left =  $customer->amount_left + $purchase->amount;
+        $customer->amount_used =  $customer->amount_used - $purchase->amount;
+        $customer->save();
+        $purchase->delete();
+    
+        return response()->json([
+            'success' => true, 'message' => 'Customer deleted successfully'
+        ]);
+    }
+}

app/Models/Purchase.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Purchase extends Model
+{
+     /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'customer_id',
+        'amount',
+    ];
+}

database/migrations/2025_04_19_185408_create_purchases_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('purchases', function (Blueprint $table) {
+            $table->id();
+            $table->integer('customer_id')->nullable();
+            $table->integer('amount')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('purchases');
+    }
+};