323 lines
11 KiB
PHP
323 lines
11 KiB
PHP
<?php
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/**
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* @file
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* Formats and sends mail using the MailMIME class.
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*
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* @see http://drupal.org/node/900794
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* @see http://api.drupal.org/api/drupal/includes--mail.inc/interface/MailSystemInterface/7
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* @see http://drupal.org/project/mailmime
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*/
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/**
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* Implements MailSystemInterface.
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*/
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class HTMLMailSystem implements MailSystemInterface {
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/**
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* Format emails according to module settings.
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*
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* Parses the message headers and body into a MailMIME object. If another module
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* subsequently modifies the body, then format() should be called again before
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* sending. This is safe because the $message['body'] is not modified.
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*
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* @param $message
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* An associative array with at least the following parts:
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* - headers: An array of (name => value) email headers.
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* - body: The text/plain or text/html message part.
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*
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* @return
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* The formatted $message, ready for sending.
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*/
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public function format(array $message) {
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$eol = variable_get('mail_line_endings', MAIL_LINE_ENDINGS);
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// @todo Remove this when issue #209672 gets resolved.
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$default_from = variable_get('site_mail', ini_get('sendmail_from'));
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if ( !empty($message['headers']['From'])
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&& $message['headers']['From'] == $default_from
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&& valid_email_address($default_from)
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) {
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$message['headers']['From'] = '"'
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. str_replace('"', '', variable_get('site_name', 'Drupal'))
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. '" <' . $default_from . '>';
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}
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// Collapse the message body array.
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if (module_exists('mailmime')) {
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$body = $this->formatMailMIME($message);
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$plain = $message['MailMIME']->getTXTBody();
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}
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else {
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if (is_array($message['body'])) {
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$message['body'] = implode("<br />$eol<br />$eol", $message['body']);
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}
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$body = theme('htmlmail', $message);
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if ($message['body'] && !$body) {
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watchdog(
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'htmlmail',
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'The %theme function did not return any text. Please check your template file for errors.',
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array('%theme' => "theme('htmlmail', \$message)"),
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WATCHDOG_WARNING
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);
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$body = $message['body'];
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}
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// @todo Change to drupal_html_to_text when issue #299138 gets resolved.
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$plain = mailsystem_html_to_text($body);
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if ($body && !$plain) {
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watchdog(
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'htmlmail',
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'The %convert function did not return any text. Please report this error to the %mailsystem issue queue.',
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array('%convert' => 'mailsystem_html_to_text()', '%mailsystem' => 'Mail system'),
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WATCHDOG_WARNING,
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'http://drupal.org/node/add/project-issue/mailsystem'
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);
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}
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}
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// Check to see whether recipient allows non-plaintext.
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if ($body && htmlmail_is_allowed($message['to'])) {
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// Optionally apply the selected web theme.
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if (module_exists('echo') && $theme = htmlmail_get_selected_theme($message)) {
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$themed_body = echo_themed_page($message['subject'], $body, $theme);
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if ($themed_body) {
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$body = $themed_body;
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}
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else {
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watchdog(
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'htmlmail',
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'The %echo function did not return any text. Please check the page template of your %theme theme for errors.',
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array('%echo' => 'echo_themed_page()', '%theme' => $theme),
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WATCHDOG_WARNING
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);
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}
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}
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// Optionally apply the selected output filter.
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if ($filter = variable_get('htmlmail_postfilter')) {
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$filtered_body = check_markup($body, $filter);
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if ($filtered_body) {
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$body = $filtered_body;
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}
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else {
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watchdog(
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'htmlmail',
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'The %check function did not return any text. Please check your %filter output filter for errors.',
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array('%check' => 'check_markup()', '%filter' => $filter),
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WATCHDOG_WARNING
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);
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}
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}
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// Store the fully-themed HTML body.
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if (isset($message['MailMIME'])) {
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$mime = &$message['MailMIME'];
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$mime->setHTMLBody($body);
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list($message['headers'], $message['body']) = $mime->toEmail($message['headers']);
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if (!$message['body']) {
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watchdog(
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'htmlmail',
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'The %toemail function did not return any text. Please report this errot to the %mailmime issue queue.',
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array('%toemail' => 'MailMIME::toEmail()', '%mailmime' => 'Mail MIME'),
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WATCHDOG_WARNING,
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'http://drupal.org/node/add/project-issue/mailmime'
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);
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}
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}
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else {
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$message['headers']['Content-Type'] = 'text/html; charset=utf-8';
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$message['body'] = $body;
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}
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}
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else {
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if (isset($message['MailMIME'])) {
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$mime = &$message['MailMIME'];
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$mime->setHTMLBody('');
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$mime->setContentType('text/plain', array('charset' => 'utf-8'));
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list($message['headers'], $message['body']) = $mime->toEmail($message['headers']);
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if (!$message['body']) {
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watchdog(
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'htmlmail',
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'The %toemail function did not return any text. Please report this errot to the %mailmime issue queue.',
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array('%toemail' => 'MailMIME::toEmail()', '%mailmime' => 'Mail MIME'),
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WATCHDOG_WARNING,
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'http://drupal.org/node/add/project-issue/mailmime'
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);
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}
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}
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else {
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$message['body'] = $plain;
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$message['headers']['Content-Type'] = 'text/plain; charset=utf-8';
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}
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}
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return $message;
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}
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/**
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* Use the MailMime class to format the message body.
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*
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* @see http://drupal.org/project/mailmime
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*/
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public function formatMailMIME(array &$message) {
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$eol = variable_get('mail_line_endings', MAIL_LINE_ENDINGS);
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$message['body'] = MailMIME::concat($message['body']);
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// Build a full email message string.
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$email = MailMIME::encodeEmail($message['headers'], $message['body']);
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// Parse it into MIME parts.
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if (!($mime = MailMIME::parse($email))) {
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watchdog(
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'HTMLMailSystem',
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'Could not parse email message.',
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array(),
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WATCHDOG_ERROR
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);
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return $message;
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}
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// Work on a copy so that the original $message['body'] remains unchanged.
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$email = $message;
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if ( !($email['body'] = $mime->getHTMLBody())
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&& !($email['body'] = $mime->getTXTBody())
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) {
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$email['body'] = '';
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}
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else {
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// Wrap formatted plaintext in <pre> tags.
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if ( $email['body'] === strip_tags($email['body']) // No html tags.
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&& preg_match('/.' . $eol . './', $email['body']) // At least one embedded newline.
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) {
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$email['body'] = '<pre>' . $email['body'] . '</pre>';
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}
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}
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// Theme with htmlmail.tpl.php.
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$body = theme('htmlmail', $email);
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$mime->setHTMLBody($body);
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// @todo Change to drupal_html_to_text when issue #299138 gets resolved.
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$mime->setTXTBody(mailsystem_html_to_text($body));
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$message['MailMIME'] = &$mime;
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return $body;
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}
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/**
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* Send an email message.
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*
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* @param $message
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* An associative array containing at least:
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* - headers: An associative array of (name => value) email headers.
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* - body: The text/plain or text/html message body.
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* - MailMIME: The message, parsed into a MailMIME object.
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*/
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public function mail(array $message) {
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$eol = variable_get('mail_line_endings', MAIL_LINE_ENDINGS);
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// Ensure that subject is non-null.
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$message += array('subject' => t('(No subject)'));
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// Check for empty recipient.
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if (empty($message['to'])) {
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if (empty($message['headers']['To'])) {
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watchdog(
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'HTMLMailSystem',
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'Cannot send email about %subject without a recipient.',
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array('subject' => $message['subject']),
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WATCHDOG_ERROR
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);
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return FALSE;
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}
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$message['to'] = $message['headers']['To'];
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}
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if (class_exists('MailMIME')) {
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$mime = new MailMIME();
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$to = $mime->encodeHeader('to', $message['to']);
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$subject = $mime->encodeHeader('subject', $message['subject']);
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$txt_headers = $mime->txtHeaders($message['headers']);
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}
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else {
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$to = mime_header_encode($message['to']);
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$subject = mime_header_encode($message['subject']);
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$txt_headers = $this->txtHeaders($message['headers']);
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}
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$body = preg_replace('#(\r\n|\r|\n)#s', $eol, $message['body']);
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// Check for empty body.
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if (empty($body)) {
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watchdog(
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'HTMLMailSystem',
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'Refusing to send a blank email to %recipient about %subject.',
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array('%recipient' => $message['to'], '%subject' => $message['subject']),
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WATCHDOG_WARNING
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);
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return FALSE;
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}
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if (variable_get('htmlmail_debug', 0)) {
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$params = array(
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$to,
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$subject,
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drupal_substr($body, 0, min(80, strpos("\n", $body))) . '...',
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$txt_headers
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);
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}
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if (isset($message['headers']['Return-Path'])) {
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// A return-path was set.
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if (isset($_SERVER['WINDIR']) || strpos($_SERVER['SERVER_SOFTWARE'], 'Win32') !== FALSE) {
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// On Windows, PHP will use the value of sendmail_from for the
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// Return-Path header.
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$old_from = ini_get('sendmail_from');
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ini_set('sendmail_from', $message['headers']['Return-Path']);
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$result = @mail($to, $subject, $body, $txt_headers);
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ini_set('sendmail_from', $old_from);
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}
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elseif (ini_get('safe_mode')) {
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// If safe mode is in effect, passing the fifth parameter to @mail
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// will cause it to return FALSE and generate a PHP warning, even
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// if the parameter is NULL.
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$result = @mail($to, $subject, $body, $txt_headers);
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}
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else {
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// On most non-Windows systems, the "-f" option to the sendmail command
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// is used to set the Return-Path.
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$extra = '-f' . $message['headers']['Return-Path'];
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$result = @mail($to, $subject, $body, $txt_headers, $extra);
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if (variable_get('htmlmail_debug', 0)) {
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$params[] = $extra;
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}
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}
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}
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else {
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// No return-path was set.
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$result = @mail($to, $subject, $body, $txt_headers);
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}
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if (!$result && variable_get('htmlmail_debug', 0)) {
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$call = '@mail(' . implode(', ', $params) . ')';
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foreach ($params as $i => $value) {
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$params[$i] = var_export($value, 1);
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}
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if (defined('DEBUG_BACKTRACE_IGNORE_ARGS')) {
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$trace = print_r(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS), 1);
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}
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else {
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$trace = debug_backtrace(0);
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for ($i = count($trace) - 1; $i >= 0; $i--) {
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unset($trace[$i]['args']);
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}
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$trace = print_r($trace);
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}
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watchdog('htmlmail', 'Mail sending failed because:<br /><pre>@call</pre><br />returned FALSE.<br /><pre>@trace</pre>', array('@call' => $call, '@trace' => $trace));
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}
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return $result;
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}
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/**
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* Converts an array of email headers to a text string.
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*
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* @param $headers
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* An associative array of ('HeaderName' => 'header value') pairs.
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*
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* @return
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* The concatenated headers as a single string.
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*/
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public function txtHeaders(array $headers) {
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$output = array();
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foreach ($headers as $name => $value) {
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if (is_array($value)) {
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foreach ($value as $val) {
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$output[] = "$name: $val";
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}
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}
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else {
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$output[] = "$name: $value";
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}
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}
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return implode("\n", $output);
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}
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}
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