ldc-bien-etre-animal/app/Http/Requests/Concerns/HasEmailRateLimit.php

<?php

declare(strict_types=1);

namespace App\Http\Requests\Concerns;

use Illuminate\Contracts\Validation\Validator;
use Illuminate\Support\Facades\RateLimiter;

trait HasEmailRateLimit
{
    /**
     * Prefix per form.
     * must be defined in each Request that uses this trait.
     */
    protected function rateLimitPrefix(): string
    {
        return '';
    }

    /**
     * Number of attempts.
     */
    protected function rateLimitMaxAttempts(): int
    {
        return 3;
    }

    /**
     * Lockout duration in seconds.
     */
    protected function rateLimitDecaySeconds(): int
    {
        return 3600;
    }

    /**
     * Translation key for the error message.
     */
    abstract protected function rateLimitMessageKey(): string;

    /**
     * Increments the rate limit counter for the submitted email address.
     */
    protected function applyEmailRateLimit(Validator $validator): void
    {
        $email = $this->input('email');

        if (! is_string($email) || $email === '') {
            return;
        }

        $key = $this->rateLimitKey($email);

        if (RateLimiter::tooManyAttempts($key, $this->rateLimitMaxAttempts())) {
            $validator->errors()->add(
                'email',
                trans($this->rateLimitMessageKey())
            );
        }
    }

    public function hitEmailRateLimit(): void
    {
        $email = $this->input('email');

        if (! is_string($email) || $email === '') {
            return;
        }
        if (! app()->environment('local')) {
            RateLimiter::hit($this->rateLimitKey($email), $this->rateLimitDecaySeconds());
        }
    }

    private function rateLimitKey(string $email): string
    {
        return "{$this->rateLimitPrefix()}:" . strtolower($email);
    }
}