laravel-beginning/form-app-with-data/app/Http/Controllers/FormController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\File;
use Carbon\Carbon;

use App\Models\ContactMessage;
use App\Models\Category;
use App\Models\Status;

class FormController extends Controller
{
    private $path;

    public function __construct()
    {
        $this->path = storage_path('app/forms/contacts.json');
    }
    
    public function index() 
    {
        $categories = Category::all();

        return view('form', compact('categories'));
    }

    public function submit(Request $request)
    {
        $validated = $request->validate([
            'name' => 'required|string|min:3|max:15',
            'email' => 'required|email|max:50',
            'message' => 'required|string|min:10|max:100',
            'category_id' => 'required|exists:categories,id',
        ]);
        
        $newStatus = Status::where('name', 'Новое')->first();
        if ($newStatus) {
            $validated['status_id'] = $newStatus->id;
        }

        ContactMessage::create($validated);

        return redirect()->back()->with('success', 'Данные сохранены!');
    }

    public function showData() 
    {
        $submissions = ContactMessage::with('category', 'status')->new()->latest()->get();

        return view('admin.index', compact('submissions'));
    }

    public function show(ContactMessage $submission)
    {
        return view('admin.show', compact('submission'));
    }

    public function edit(ContactMessage $submission)
    {
        $categories = Category::all();
        $statuses = Status::all();

        return view('admin.edit', compact('submission', 'categories', 'statuses'));
    }

    public function update(Request $request , ContactMessage $submission)
    {
        $validated = $request->validate([
            'name' => 'required|string|min:3|max:15',
            'email' => 'required|email|max:50',
            'message' => 'required|string|min:10|max:100',
            'status_id' => 'required|exists:statuses,id',
        ]);

        $submission->update($validated);

        return redirect()->route('admin.index')->with('success', 'Данные обновлены!');
    }

    public function addNote(Request $request, ContactMessage $submission)
    {
        $request->validate(['body' => 'required|string']);

        $submission->notes()->create($request->only('body'));

        return back()->with('success', 'Заметка добавлена!');
    }

    public function delete(ContactMessage $submission)
    {
        $submission -> delete();

        return redirect()->route('admin.index')->with('success', 'Запись удалена!');
    }
}