preregister/app/Http/Requests/SubscribePublicPageRequest.php

<?php

declare(strict_types=1);

namespace App\Http\Requests;

use App\Models\PreregistrationPage;
use App\Rules\ValidPhoneNumber;
use App\Services\PhoneNumberNormalizer;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;
use Illuminate\Validation\Rules\Email;

class SubscribePublicPageRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    /**
     * @return array<string, mixed>
     */
    public function rules(): array
    {
        /** @var PreregistrationPage $page */
        $page = $this->route('publicPage');
        $page->loadMissing('blocks');

        $emailRule = (new Email)
            ->rfcCompliant()
            ->preventSpoofing();

        $phoneRules = ['nullable', 'string', 'max:255'];

        if ($page->isPhoneFieldEnabledForSubscribers()) {
            $phoneRules = [
                Rule::requiredIf(fn (): bool => $page->isPhoneFieldRequiredForSubscribers()),
                'nullable',
                'string',
                'max:32',
                new ValidPhoneNumber(app(PhoneNumberNormalizer::class)),
            ];
        }

        return [
            'first_name' => ['required', 'string', 'max:255'],
            'last_name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'string', 'max:255', $emailRule],
            'phone' => $phoneRules,
        ];
    }

    /**
     * @return array<string, string>
     */
    public function messages(): array
    {
        return [
            'email' => __('Please enter a valid email address.'),
        ];
    }

    /**
     * @return array<string, string>
     */
    public function attributes(): array
    {
        return [
            'first_name' => __('First name'),
            'last_name' => __('Last name'),
            'email' => __('Email'),
            'phone' => __('Phone'),
        ];
    }

    protected function prepareForValidation(): void
    {
        $email = $this->input('email');
        if (is_string($email)) {
            $this->merge([
                'email' => strtolower(trim($email)),
            ]);
        }

        /** @var PreregistrationPage $page */
        $page = $this->route('publicPage');
        if (! $page->isPhoneFieldEnabledForSubscribers()) {
            $this->merge(['phone' => null]);

            return;
        }

        $phone = $this->input('phone');
        if ($phone === null || $phone === '') {
            $this->merge(['phone' => null]);

            return;
        }

        if (is_string($phone)) {
            $trimmed = trim($phone);
            $this->merge(['phone' => $trimmed === '' ? null : $trimmed]);
        }
    }
}