postoffice-1.0.x-dev/extensions/postoffice_compat/src/Plugin/Mail/CompatMailBase.php

<?php

namespace Drupal\postoffice_compat\Plugin\Mail;

use Drupal\Component\Render\MarkupInterface;
use Drupal\Core\Logger\LoggerChannelInterface;
use Drupal\Core\Mail\MailInterface;
use Symfony\Component\Mailer\MailerInterface;
use Symfony\Component\Mime\RawMessage;

/**
 * Base class for core compatibility mail plugins.
 */
abstract class CompatMailBase implements MailInterface {

  /**
   * The mailer.
   */
  protected MailerInterface $mailer;

  /**
   * The log channel.
   */
  protected LoggerChannelInterface $logger;

  /**
   * The text format to us.
   *
   * If this property is NULL, the default fallback format will be used.
   */
  protected ?string $format = NULL;

  /**
   * Constructs a new core compatibility mail plugin base class.
   */
  public function __construct(MailerInterface $mailer, LoggerChannelInterface $logger) {
    $this->mailer = $mailer;
    $this->logger = $logger;
  }

  /**
   * Returns a symfony mail generated from the given core mail.
   */
  abstract protected function emailFromMessage(array $message): RawMessage;

  /**
   * {@inheritdoc}
   */
  public function format(array $message) {
    $message['body'] = implode("\n\n", array_map(
      fn ($chunk) => $chunk instanceof MarkupInterface ? $chunk : \check_markup($chunk, $this->format, $message['langcode']),
      $message['body']
    ));
    return $message;
  }

  /**
   * {@inheritdoc}
   */
  public function mail(array $message) {
    $result = FALSE;

    try {
      $this->mailer->send($this->emailFromMessage($message));
      $result = TRUE;
    }
    catch (\Exception $e) {
      $this->logger->error($e->getMessage(), ['exception' => $e]);
    }

    return $result;
  }

}