Souke/common/components/BulkMailer/BulkMailerBrevo.php

<?php

namespace common\components\BulkMailer;

use domain\User\User\UserSolver;
use GuzzleHttp\Client;
use Psr\Http\Message\ResponseInterface;

class BulkMailerBrevo implements BulkMailerInterface
{
    public function sendEmails(array $contactsArray, string $fromName, string $fromEmail, string $subject, string $htmlContent, string $textContent = null)
    {
        $userSolver = UserSolver::getInstance();
        $client = new Client();
        $data = [
            'sender' => [
                'name' => $fromName,
                'email' => $fromEmail
            ],
            'bcc' => [],
            'subject' => $subject,
            'htmlContent' => $htmlContent
        ] ;

        foreach($contactsArray as $user) {
            $data['bcc'][] = [
                'name' => $userSolver->getUsernameFromArray($user),
                'email' => $user['email']
            ];

            if(count($data['bcc']) == 50) {
                $this->requestPostEmailViaApi($client, $data);
                $data['bcc'] = [] ;
            }
        }

        if(count($data['bcc']) > 0) {
            $this->requestPostEmailViaApi($client, $data);
        }
    }

    public function requestPostEmailViaApi(Client $client, array $data): ResponseInterface
    {
        return $client->request('POST', 'https://api.brevo.com/v3/smtp/email', [
            'headers' => [
                'accept' => 'application/json',
                'content-type' => 'application/json',
                'api-key' => \Yii::$app->parameterBag->get('brevoApiKey'),
            ],
            'body' => json_encode($data)
        ]);
    }
}