First invoice implementation.

app/Http/Controllers/Api/InvoiceController.php

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+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\Invoice;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class InvoiceController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index($from = null, $end = null): JsonResponse
+    {
+        $from = $from . ' 00:00:00';
+        $end = $end . ' 23:59:59';
+        return response()->json(Invoice::whereBetween('created_at', [$from, $end])->with('address')->orderBy('created_at', 'desc')->get());
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request): JsonResponse
+    {
+        $invoiceData = $request->validate([
+            'customer_id' => 'required|integer|exists:customers,id',
+            'address_id' => 'required|integer|exists:addresses,id',
+            'delivery_id' => 'nullable|integer|exists:addresses,id',
+            'tax' => 'required|numeric',
+            'sum' => 'required|numeric',
+        ]);
+        $invoiceData['user_id'] = auth()->id();
+        $invoiceData['type'] = '380';
+        $invoiceData['status'] = 'created';
+        $invoiceData['invoice_number'] = Invoice::whereYear('created_at', now()->year)->count() + 1;
+
+
+
+        $invoice = new Invoice($invoiceData);
+        $invoice->save();
+
+        return response()->json($invoice);
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Invoice $invoice)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Invoice $invoice)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Invoice $invoice)
+    {
+        //
+    }
+}

app/Http/Controllers/Api/InvoiceitemController.php

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+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\Invoice;
+use App\Models\Invoiceitem;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class InvoiceitemController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index(Invoice $invoice): JsonResponse
+    {
+        return response()->json($invoice->items);
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request, Invoice $invoice): JsonResponse
+    {
+        $itemData = $request->validate([
+            'amount' => 'required|numeric|min:0',
+            'discount' => 'numeric|nullable',
+            'tax' => 'required|numeric|min:0',
+            'price' => 'required|numeric|min:0',
+            'total' => 'required|numeric|min:0',
+            'name' => 'required|string',
+            'description' => 'nullable|string',
+
+        ]);
+
+        $item = $invoice->items()->create($itemData);
+        return response()->json($item);
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Invoiceitem $invoiceitem)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Invoiceitem $invoiceitem)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Invoiceitem $invoiceitem)
+    {
+        //
+    }
+}

app/Http/Controllers/InvoiceController.php

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+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Invoice;
+use Illuminate\Http\Request;
+
+class InvoiceController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        return view('invoice.index');
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        return view('invoice.create');
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Invoice $invoice)
+    {
+        return view('invoice.show', ['invoice' => $invoice]);
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(Invoice $invoice)
+    {
+        //
+    }
+}