de-user24-repo/app/Http/Controllers/ApplicationController.php

<?php

namespace App\Http\Controllers;

class ApplicationController extends Controller
{
    public function index()
    {
        $application = Auth::user()->application()->with("course")->latest()->pagination(10);
        return view(route('application.index'), compact('application'));
    }

    public function create()
    {
        $courses = Course::all();
        return view(route('application.create'), compact('courses'));
    }

    public function store()
    {
        $validated = $request->validate(['course_id' => ['required', 'exists:course,id'], 'start_date' => ['required', 'date', 'after:today'], 'payment_method' => ['required', 'string', Rule::in(['cash', 'phone_transfer'])]]);
        $existingApplication = Auth::user()->application();
    }

    public function comment(Request $request, Application $application)
    {
        if (!$application->canAddCommnet()) { return back()->withErrors('error', 'не получчилось оставить коммнетарий'); }
        $application->update(['comment' => $request->comment]);
        return back()->with('success', 'Успешно');
    }
}