201 lines
7.9 KiB
PHP
201 lines
7.9 KiB
PHP
<?php
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/**
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* @file
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* API functions for processing and sending email.
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*/
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use Drupal\Core\Mail\MailFormatHelper;
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/**
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* Composes and optionally sends an email message.
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*
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* Sending an email works with defining an email template (subject, text
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* and possibly email headers) and the replacement values to use in the
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* appropriate places in the template. Processed email templates are
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* requested from hook_mail() from the module sending the email. Any module
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* can modify the composed email message array using hook_mail_alter().
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* Finally drupal_mail_system()->mail() sends the email, which can
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* be reused if the exact same composed email is to be sent to multiple
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* recipients.
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*
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* Finding out what language to send the email with needs some consideration.
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* If you send email to a user, her preferred language should be fine, so
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* use user_preferred_langcode(). If you send email based on form values
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* filled on the page, there are two additional choices if you are not
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* sending the email to a user on the site. You can either use the language
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* used to generate the page or the site default language. See
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* language_default(). The former is good if sending email to the person
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* filling the form, the later is good if you send email to an address
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* previously set up (like contact addresses in a contact form).
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*
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* Taking care of always using the proper language is even more important
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* when sending emails in a row to multiple users. Hook_mail() abstracts
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* whether the mail text comes from an administrator setting or is
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* static in the source code. It should also deal with common mail tokens,
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* only receiving $params which are unique to the actual email at hand.
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*
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* An example:
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*
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* @code
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* function example_notify($accounts) {
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* foreach ($accounts as $account) {
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* $params['account'] = $account;
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* // example_mail() will be called based on the first drupal_mail() parameter.
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* drupal_mail('example', 'notice', $account->mail, user_preferred_langcode($account), $params);
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* }
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* }
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*
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* function example_mail($key, &$message, $params) {
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* $data['user'] = $params['account'];
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* $options['langcode'] = $message['langcode'];
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* user_mail_tokens($variables, $data, $options);
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* switch($key) {
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* case 'notice':
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* // If the recipient can receive such notices by instant-message, do
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* // not send by email.
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* if (example_im_send($key, $message, $params)) {
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* $message['send'] = FALSE;
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* break;
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* }
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* $message['subject'] = t('Notification from !site', $variables, $options);
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* $message['body'][] = t("Dear !username\n\nThere is new content available on the site.", $variables, $options);
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* break;
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* }
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* }
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* @endcode
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*
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* Another example, which uses drupal_mail() to format a message for sending
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* later:
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*
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* @code
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* $params = array('current_conditions' => $data);
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* $to = 'user@example.com';
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* $message = drupal_mail('example', 'notice', $to, $langcode, $params, FALSE);
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* // Only add to the spool if sending was not canceled.
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* if ($message['send']) {
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* example_spool_message($message);
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* }
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* @endcode
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*
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* @param string $module
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* A module name to invoke hook_mail() on. The {$module}_mail() hook will be
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* called to complete the $message structure which will already contain common
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* defaults.
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* @param string $key
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* A key to identify the email sent. The final message ID for email altering
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* will be {$module}_{$key}.
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* @param string $to
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* The email address or addresses where the message will be sent to. The
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* formatting of this string will be validated with the
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* @link http://php.net/manual/filter.filters.validate.php PHP email validation filter. @endlink
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* Some examples are:
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* - user@example.com
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* - user@example.com, anotheruser@example.com
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* - User <user@example.com>
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* - User <user@example.com>, Another User <anotheruser@example.com>
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* @param string $langcode
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* Language code to use to compose the email.
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* @param array $params
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* (optional) Parameters to build the email.
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* @param string|null $reply
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* Optional email address to be used to answer.
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* @param bool $send
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* If TRUE, drupal_mail() will call drupal_mail_system()->mail() to deliver
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* the message, and store the result in $message['result']. Modules
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* implementing hook_mail_alter() may cancel sending by setting
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* $message['send'] to FALSE.
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*
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* @return array
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* The $message array structure containing all details of the
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* message. If already sent ($send = TRUE), then the 'result' element
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* will contain the success indicator of the email, failure being already
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* written to the watchdog. (Success means nothing more than the message being
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* accepted at php-level, which still doesn't guarantee it to be delivered.)
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*
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* @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
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* Use \Drupal::service('plugin.manager.mail')->mail() in procedural code. In
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* Object-Oriented code inject the 'plugin.manager.mail' service and use the
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* ::mail() method.
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*/
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function drupal_mail($module, $key, $to, $langcode, $params = array(), $reply = NULL, $send = TRUE) {
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return \Drupal::service('plugin.manager.mail')->mail($module, $key, $to, $langcode, $params, $reply, $send);
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}
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/**
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* Returns an instance of the mail plugin to use for a given message ID.
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*
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* @param string $module
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* The module name which was used by drupal_mail() to invoke hook_mail().
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* @param string $key
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* A key to identify the email sent. The final message ID for the email
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* alter hook in drupal_mail() would have been {$module}_{$key}.
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*
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* @return \Drupal\Core\Mail\MailInterface
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* A mail plugin instance.
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*
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* @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
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*
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* @see \Drupal\Core\Mail\MailManager::getInstance()
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*
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* @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
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* Use \Drupal::service('plugin.manager.mail')->getInstance() in procedural
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* code. In Object-Oriented code inject the 'plugin.manager.mail' service and
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* use the ::getInstance() method.
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*/
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function drupal_mail_system($module, $key) {
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return \Drupal::service('plugin.manager.mail')->getInstance(array('module' => $module, 'key' => $key));
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}
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/**
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* Performs format=flowed soft wrapping for mail (RFC 3676).
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*
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* We use delsp=yes wrapping, but only break non-spaced languages when
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* absolutely necessary to avoid compatibility issues.
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*
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* We deliberately use LF rather than CRLF, see drupal_mail().
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*
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* @param $text
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* The plain text to process.
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* @param $indent (optional)
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* A string to indent the text with. Only '>' characters are repeated on
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* subsequent wrapped lines. Others are replaced by spaces.
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*
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* @return
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* The content of the email as a string with formatting applied.
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*
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* @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
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* Use \Drupal\Core\Utility\Mail::wrapMail().
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*/
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function drupal_wrap_mail($text, $indent = '') {
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return MailFormatHelper::wrapMail($text, $indent);
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}
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/**
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* Transforms an HTML string into plain text, preserving its structure.
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*
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* The output will be suitable for use as 'format=flowed; delsp=yes' text
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* (RFC 3676) and can be passed directly to drupal_mail() for sending.
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*
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* We deliberately use LF rather than CRLF, see drupal_mail().
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*
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* This function provides suitable alternatives for the following tags:
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* <a> <em> <i> <strong> <b> <br> <p> <blockquote> <ul> <ol> <li> <dl> <dt>
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* <dd> <h1> <h2> <h3> <h4> <h5> <h6> <hr>
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*
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* @param $string
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* The string to be transformed.
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* @param $allowed_tags (optional)
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* If supplied, a list of tags that will be transformed. If omitted, all
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* all supported tags are transformed.
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*
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* @return
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* The transformed string.
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*
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* @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
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* Use \Drupal\Core\Utility\Mail::htmlToText().
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*/
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function drupal_html_to_text($string, $allowed_tags = NULL) {
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return MailFormatHelper::htmlToText($string, $allowed_tags);
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}
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