<?php
/**
 * @file
 * This is the primary module file.
 */

use Drupal\Core\Render\Markup;

include_once __DIR__ . '/includes/helpers/utilities.inc';

// Define permissions.
define('SWIFTMAILER_ADMINISTER', 'swiftmailer_administer');

// Define message formats.
define('SWIFTMAILER_FORMAT_PLAIN', 'text/plain');
define('SWIFTMAILER_FORMAT_HTML', 'text/html');

// Define transport types.
define('SWIFTMAILER_TRANSPORT_SMTP', 'smtp');
define('SWIFTMAILER_TRANSPORT_SENDMAIL', 'sendmail');
define('SWIFTMAILER_TRANSPORT_NATIVE', 'native');
define('SWIFTMAILER_TRANSPORT_SPOOL', 'spool');

// Define header types.
define('SWIFTMAILER_HEADER_TEXT', 'text');
define('SWIFTMAILER_HEADER_PARAMETERIZED', 'parameterized');
define('SWIFTMAILER_HEADER_MAILBOX', 'mailbox');
define('SWIFTMAILER_HEADER_DATE', 'date');
define('SWIFTMAILER_HEADER_ID', 'ID');
define('SWIFTMAILER_HEADER_PATH', 'path');

// Define system variables defaults.
define('SWIFTMAILER_VARIABLE_RESPECT_FORMAT_DEFAULT', FALSE);
define('SWIFTMAILER_VARIABLE_CONVERT_MODE_DEFAULT', FALSE);
define('SWIFTMAILER_VARIABLE_PATH_DEFAULT', '');
define('SWIFTMAILER_VARIABLE_FORMAT_DEFAULT', 'text/plain');
define('SWIFTMAILER_VARIABLE_CHARACTER_SET_DEFAULT', 'UTF-8');

/**
 * Implements hook_mail().
 */
function swiftmailer_mail($key, &$message) {
  $user = \Drupal::currentUser();
  $message['headers']['Content-Type'] = SWIFTMAILER_FORMAT_HTML;

  $text[] = '<h3>' . t('Dear @user,', array('@user' => $user->getDisplayName())) . '</h3>';
  $text[] = '<p>' . t('This e-mail has been sent from @site by the Swift Mailer module. The module has been successfully configured.', array('@site' => \Drupal::config('system.site')->get('name'))) . '</p>';
  $text[] = t('Kind regards') . '<br /><br />';
  $text[] = t('The Swift Mailer module');

  $message['subject'] = t('Swift Mailer has been successfully configured!');
  $message['body'] = array_map(function ($text) { return Markup::create($text); }, $text);
}

/**
 * Implements hook_theme().
 */
function swiftmailer_theme($existing, $type, $theme, $path) {
  return array(
    'swiftmailer' => array(
      'variables' => array(
        'message' => array(),
      ),
      'mail theme' => TRUE,
    ),
  );
}

/**
 * Implements hook_theme_suggestions_HOOK() for swiftmailer.
 */
function swiftmailer_theme_suggestions_swiftmailer(array $variables) {
  $suggestions = [];
  $suggestions[] = 'swiftmailer';
  $suggestions[] = 'swiftmailer__' . $variables['message']['module'];
  $suggestions[] = 'swiftmailer__' . $variables['message']['module'] . '__' . $variables['message']['key'];
  return $suggestions;
}

/**
 * Prepares variables for swiftmailer templates.
 *
 * Default template: swiftmailer.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - message: An associative array containing the message array.
 *   - body: The processed body.
 */
function template_preprocess_swiftmailer(&$variables) {
  $variables['subject'] = $variables['message']['subject'];
  $variables['body'] = $variables['message']['body'];
}