word-salad/app/Http/Controllers/ReaderController.php

<?php

namespace App\Http\Controllers;

use App\Models\Subscriber;
use Illuminate\Http\Request;
use Illuminate\Http\RedirectResponse;

class ReaderController extends Controller
{
    public function subscribe(Request $request): RedirectResponse
    {
        // Validate email
        $validated = $request->validate([
            'email' => 'required|email|max:512',
        ]);

        if($validated['email']) {
            Subscriber::firstOrCreate(['email' => $validated['email']]);
            return redirect(route('subscribe-success'));
        } else {
            return redirect(route('subscribe-fail'));
        }
    }

    public function unsubscribe(Request $request): RedirectResponse
    {
        // Validate email
        $validated = $request->validate([
            'email' => 'required|email|max:512',
        ]);

        if($validated['email']) {
            Subscriber::where('email', $validated['email'])->delete();
            return redirect(route('unsubscribe-success'));
        } else {
            return redirect(route('unsubscribe-fail'));
        }
    }
}