<?php
// $Id: phpmailer.admin.inc,v 1.15.2.4 2010/01/17 18:04:49 smk Exp $

/**
 * @file
 * Administrative functions for PHPMailer integration module.
 */

/**
 * Form builder for both the Mime Mail settings and our own settings page.
 *
 * @ingroup forms
 * @see phpmailer_settings_form_validate()
 * @see phpmailer_settings_form_submit()
 */
function phpmailer_settings_form() {
  if (module_exists('mimemail') && $_GET['q'] == 'admin/settings/phpmailer') {
    // Redirect to Mime Mail settings page instead.
    drupal_goto('admin/settings/mimemail');
  }

  // Only enable the 'send all e-mails' option if Mime Mail is not configured
  // the same (mimemail_alter is the counterpart to smtp_on).
  if (!module_exists('mimemail') || !variable_get('mimemail_alter', 0)) {
    $form['smtp_on'] = array(
      '#type' => 'checkbox',
      '#title' => t('Use PHPMailer to send e-mails'),
      '#default_value' => variable_get('smtp_on', 0),
      '#description' => t('When enabled, PHPMailer will be used to deliver all site e-mails.'),
    );
  }
  else {
    $form['smtp_on'] = array(
      '#type' => 'value',
      '#value' => 0,
    );
  }

  $form['server']['smtp_host'] = array(
    '#type' => 'textfield',
    '#title' => t('Primary SMTP server'),
    '#default_value' => variable_get('smtp_host', 'localhost'),
    '#description' => t('The host name or IP address of your primary SMTP server.  Use !gmail-smtp for Google Mail.', array('!gmail-smtp' => '<code>smtp.gmail.com</code>')),
    '#required' => TRUE,
  );
  $form['server']['smtp_hostbackup'] = array(
    '#type' => 'textfield',
    '#title' => t('Backup SMTP server'),
    '#default_value' => variable_get('smtp_hostbackup', ''),
    '#description' => t('Optional host name or IP address of a backup server, if the primary server fails.  You may override the default port below by appending it to the host name separated by a colon.  Example: !hostname', array('!hostname' => '<code>localhost:465</code>')),
  );
  $form['server']['smtp_port'] = array(
    '#type' => 'textfield',
    '#title' => t('SMTP port'),
    '#size' => 5,
    '#maxlength' => 5,
    '#default_value' => variable_get('smtp_port', '25'),
    '#description' => t('The standard SMTP port is 25, for Google Mail use 465.'),
    '#required' => TRUE,
  );
  $form['server']['smtp_protocol'] = array(
    '#type' => 'select',
    '#title' => t('Use secure protocol'),
    '#default_value' => variable_get('smtp_protocol', ''),
    '#options' => array('' => t('No'), 'ssl' => t('SSL'), 'tls' => t('TLS')),
    '#description' => t('Whether to use an encrypted connection to communicate with the SMTP server.  Google Mail requires SSL.'),
  );
  if (!function_exists('openssl_open')) {
    $form['server']['smtp_protocol']['#default_value'] = '';
    $form['server']['smtp_protocol']['#disabled'] = TRUE;
    $form['server']['smtp_protocol']['#description'] .= ' ' . t('Note: This option has been disabled since your PHP installation does not seem to have support for OpenSSL.');
    variable_set('smtp_protocol', '');
  }

  $form['auth'] = array(
    '#type' => 'fieldset',
    '#title' => t('SMTP authentication'),
    '#description' => t('Leave blank if your SMTP server does not require authentication.'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['auth']['smtp_username'] = array(
    '#type' => 'textfield',
    '#title' => t('Username'),
    '#default_value' => variable_get('smtp_username', ''),
    '#description' => t('For Google Mail, enter your username including "@gmail.com".'),
  );
  if (!variable_get('smtp_hide_password', 0)) {
    $form['auth']['smtp_password'] = array(
      '#type' => 'textfield',
      '#title' => t('Password'),
      '#default_value' => variable_get('smtp_password', ''),
    );
    $form['auth']['smtp_hide_password'] = array(
      '#type' => 'checkbox',
      '#title' => t('Hide password'),
      '#default_value' => 0,
      '#description' => t("Check this option to permanently hide the plaintext password from peeking eyes. You may still change the password afterwards, but it won't be displayed anymore."),
    );
  }
  else {
    $have_password = (variable_get('smtp_password', '') != '');
    $form['auth']['smtp_password'] = array(
      '#type' => 'password',
      '#title' => $have_password ? t('Change password') : t('Password'),
      '#description' => $have_password ? t('Leave empty if you do not intend to change the current password.') : '',
    );
  }

  $form['advanced'] = array(
    '#type' => 'fieldset',
    '#title' => t('Advanced SMTP settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['advanced']['smtp_fromname'] = array(
    '#type' => 'textfield',
    '#title' => t('"From" name'),
    '#default_value' => variable_get('smtp_fromname', ''),
    '#description' => t('Enter a name that should appear as the sender for all messages.  If left blank the site name will be used instead: %sitename.', array('%sitename' => variable_get('site_name', 'Drupal'))),
  );
  $form['advanced']['smtp_always_replyto'] = array(
    '#type' => 'checkbox',
    '#title' => t('Always set "Reply-To" address'),
    '#default_value' => variable_get('smtp_always_replyto', 0),
    '#description' => t('Enables setting the "Reply-To" address to the original sender of the message, if unset.  This is required when using Google Mail, which would otherwise overwrite the original sender.'),
  );
  $form['advanced']['smtp_keepalive'] = array(
    '#type' => 'checkbox',
    '#title' => t('Keep connection alive'),
    '#default_value' => variable_get('smtp_keepalive', 0),
    '#description' => t('Whether to reuse an existing connection during a request.  Improves performance when sending a lot of e-mails at once.'),
  );
  $form['advanced']['smtp_debug'] = array(
    '#type' => 'select',
    '#title' => t('Debug level'),
    '#default_value' => variable_get('smtp_debug', 0),
    '#options' => array(0 => t('Disabled'), 1 => t('Errors only'), 2 => t('Server responses'), 4 => t('Full communication')),
    '#description' => t("Debug the communication with the SMTP server.  You normally shouldn't enable this unless you're trying to debug e-mail sending problems."),
  );

  // Send a test email message if an address has been entered.
  if ($test_address = variable_get('phpmailer_test', '')) {
    // Delete first to avoid unintended resending in case of an error.
    variable_del('phpmailer_test');
    drupal_mail('phpmailer', 'test', $test_address, NULL);
    drupal_set_message(t('A test e-mail has been sent to %email. <a href="@watchdog-url">Check the logs</a> for any error messages.', array('%email' => $test_address, '@watchdog-url' => url('admin/reports/dblog'))));
  }

  $form['test'] = array(
    '#type' => 'fieldset',
    '#title' => t('Test configuration'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['test']['phpmailer_test'] = array(
    '#type' => 'textfield',
    '#title' => t('Recipient'),
    '#default_value' => '',
    '#description' => t('Type in an address to have a test e-mail sent there.'),
  );
  if (module_exists('mimemail')) {
    $form['test']['preview'] = array(
      '#type' => 'item',
      '#title' => t('Preview'),
      '#value' => t('For theming of HTML mails sent via Mime Mail, you can <a href="@preview-url" target="_blank">preview an example mail</a>.', array('@preview-url' => url('phpmailer/preview'))),
    );
  }

  if (module_exists('mimemail')) {
    return $form;
  }

  $form['#submit'] = array('phpmailer_settings_form_submit');

  return system_settings_form($form);
}

/**
 * Form validation function.
 *
 * @see phpmailer_settings_form()
 */
function phpmailer_settings_form_validate($form, &$form_state) {
  if ($form_state['values']['smtp_on']) {
    if (intval($form_state['values']['smtp_port']) == 0) {
      form_set_error('smtp_port', t('You must enter a valid SMTP port number.'));
    }
  }
}

/**
 * Form submit function.
 *
 * @see phpmailer_settings_form()
 */
function phpmailer_settings_form_submit($form, &$form_state) {
  // Enable/disable mail sending subsystem.
  if ($form_state['values']['smtp_on']) {
    if (!phpmailer_enabled()) {
      variable_set('smtp_library', drupal_get_filename('module', 'phpmailer'));
      drupal_set_message(t('PHPMailer will be used to deliver all site e-mails.'));
      watchdog('phpmailer', 'PHPMailer has been enabled.');
    }
  }
  else if (phpmailer_enabled()) {
    variable_del('smtp_library');
    drupal_set_message(t('PHPMailer has been disabled.'));
    watchdog('phpmailer', 'PHPMailer has been disabled.');
  }

  // Log configuration changes.
  $settings = array('host', 'port', 'protocol', 'username');
  // Ignore empty passwords if hide password is active.
  if (variable_get('smtp_hide_password', 0) && $form_state['values']['smtp_password'] == '') {
    unset($form_state['values']['smtp_password']);
  }
  else {
    $settings[] = 'password';
  }
  foreach ($settings as $setting) {
    if ($form_state['values']['smtp_'. $setting] != variable_get('smtp_'. $setting, '')) {
      watchdog('phpmailer', 'SMTP configuration changed.');
      break;
    }
  }
}

/**
 * Implementation of hook_mail().
 */
function phpmailer_mail($key, &$message, $params) {
  $message['subject'] = t('PHPMailer test e-mail');
  $message['body'][] = t('Your site is properly configured to send e-mails using the PHPMailer library.');
}

/**
 * Menu callback; Render a HTML mail preview in the browser.
 */
function phpmailer_preview() {
  global $user;

  // Suppress devel output in preview.
  $GLOBALS['devel_shutdown'] = TRUE;

  $mailkey = 'phpmailer_preview';
  // Use example address to prevent usage of configurable mail format setting.
  $recipient = 'test@example.com';
  // @see user_register_submit()
  $language = user_preferred_language($user);
  $variables = user_mail_tokens($user, $language);
  $variables['!password'] = 'test';
  $subject = _user_mail_text('register_no_approval_required_subject', $language, $variables);
  $body = _user_mail_text('register_no_approval_required_body', $language, $variables);
  $sender = NULL;
  $headers = array();

  // Convert non-html messages.
  // @see drupal_mail_wrapper()
  $format = variable_get('mimemail_format', FILTER_FORMAT_DEFAULT);
  $body = check_markup($body, $format, FALSE);
  // @see mimemail()
  foreach (module_implements('mail_alter') as $module) {
    $function = $module .'_mail_alter';
    $function($mailkey, $recipient, $subject, $body, $sender, $headers);
  }
  // @see mimemail_prepare()
  $body = theme('mimemail_message', $body, $mailkey);
  foreach (module_implements('mail_post_process') as $module) {
    $function = $module .'_mail_post_process';
    $function($body, $mailkey);
  }

  print $body;
  exit;
}

