friendica-addons/mailstream/mailstream.php

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<?php
/**
* Name: Mail Stream
* Description: Mail all items coming into your network feed to an email address
* Version: 2.0
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* Author: Matthew Exon <http://mat.exon.name>
*/
use Friendica\Content\Text\BBCode;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
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use Friendica\Core\System;
use Friendica\Core\Worker;
use Friendica\Database\DBA;
use Friendica\DI;
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use Friendica\Model\Contact;
use Friendica\Model\Post;
use Friendica\Model\User;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
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use Friendica\Network\HTTPClient\Client\HttpClientOptions;
use Friendica\Protocol\Activity;
/**
* Sets up the addon hooks and the database table
*/
function mailstream_install()
{
Hook::register('addon_settings', 'addon/mailstream/mailstream.php', 'mailstream_addon_settings');
Hook::register('addon_settings_post', 'addon/mailstream/mailstream.php', 'mailstream_addon_settings_post');
Hook::register('post_local_end', 'addon/mailstream/mailstream.php', 'mailstream_post_hook');
Hook::register('post_remote_end', 'addon/mailstream/mailstream.php', 'mailstream_post_hook');
Hook::register('mailstream_send_hook', 'addon/mailstream/mailstream.php', 'mailstream_send_hook');
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Logger::info("installed mailstream");
}
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/**
* This is a statement rather than an actual function definition. The simple
* existence of this method is checked to figure out if the addon offers a
* module.
*/
function mailstream_module() {}
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/**
* Adds an item in "addon features" in the admin menu of the site
*
* @param string $o HTML form data
*/
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function mailstream_addon_admin(string &$o)
{
$frommail = DI::config()->get('mailstream', 'frommail');
$template = Renderer::getMarkupTemplate('admin.tpl', 'addon/mailstream/');
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$config = [
'frommail',
DI::l10n()->t('From Address'),
$frommail,
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DI::l10n()->t('Email address that stream items will appear to be from.')
];
$o .= Renderer::replaceMacros($template, [
'$frommail' => $config,
'$submit' => DI::l10n()->t('Save Settings')
]);
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}
/**
* Process input from the "addon features" part of the admin menu
*/
function mailstream_addon_admin_post()
{
if (!empty($_POST['frommail'])) {
DI::config()->set('mailstream', 'frommail', $_POST['frommail']);
}
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}
/**
* Creates a message ID for a post URI in accordance with RFC 1036
* See also http://www.jwz.org/doc/mid.html
*
* @param string $uri the URI to be converted to a message ID
*
* @return string the created message ID
*/
function mailstream_generate_id(string $uri): string
{
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$host = DI::baseUrl()->getHost();
$resource = hash('md5', $uri);
$message_id = "<" . $resource . "@" . $host . ">";
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Logger::debug('generated message ID', ['id' => $message_id, 'uri' => $uri]);
return $message_id;
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}
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function mailstream_send_hook(array $data)
{
$criteria = array('uid' => $data['uid'], 'contact-id' => $data['contact-id'], 'uri' => $data['uri']);
$item = Post::selectFirst([], $criteria);
if (empty($item)) {
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Logger::error('could not find item');
return;
}
$user = User::getById($item['uid']);
if (empty($user)) {
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Logger::error('could not find user', ['uid' => $item['uid']]);
return;
}
if (!mailstream_send($data['message_id'], $item, $user)) {
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Logger::debug('send failed, will retry', $data);
if (!Worker::defer()) {
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Logger::error('failed and could not defer', $data);
}
}
}
/**
* Called when either a local or remote post is created. If
* mailstream is enabled and the necessary data is available, forks a
* workerqueue item to send the email.
*
* @param array $item content of the item (may or may not already be stored in the item table)
* @return void
*/
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function mailstream_post_hook(array &$item)
{
if ($item['uid'] === 0) {
Logger::debug('mailstream: root user, skipping item ' . $item['id']);
return;
}
if (!DI::pConfig()->get($item['uid'], 'mailstream', 'enabled')) {
Logger::debug('mailstream: not enabled.', ['item' => $item['id'], ' uid ' => $item['uid']]);
return;
}
if (!$item['contact-id']) {
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Logger::debug('no contact-id', ['item' => $item['id']]);
return;
}
if (!$item['uri']) {
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Logger::debug('no uri', ['item' => $item['id']]);
return;
}
if ($item['verb'] == Activity::ANNOUNCE) {
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Logger::debug('ignoring announce', ['item' => $item['id']]);
return;
}
if (DI::pConfig()->get($item['uid'], 'mailstream', 'nolikes')) {
if ($item['verb'] == Activity::LIKE) {
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Logger::debug('ignoring like', ['item' => $item['id']]);
return;
}
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if ($item['verb'] == Activity::DISLIKE) {
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Logger::debug('ignoring dislike', ['item' => $item['id']]);
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return;
}
}
$message_id = mailstream_generate_id($item['uri']);
$send_hook_data = [
'uid' => $item['uid'],
'contact-id' => $item['contact-id'],
'uri' => $item['uri'],
'message_id' => $message_id,
'tries' => 0,
];
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Hook::fork(Worker::PRIORITY_LOW, 'mailstream_send_hook', $send_hook_data);
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}
/**
* If the user has configured attaching images to emails as
* attachments, this function searches the post for such images,
* retrieves the image, and inserts the data and metadata into the
* supplied array
*
* @param array $item content of the item
* @param array $attachments contains an array element for each attachment to add to the email
*
* @return array new value of the attachments table (results are also stored in the reference parameter)
*/
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function mailstream_do_images(array &$item, array &$attachments)
{
if (!DI::pConfig()->get($item['uid'], 'mailstream', 'attachimg')) {
return;
}
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$attachments = [];
preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", $item["body"], $matches1);
preg_match_all("/\[img\](.*?)\[\/img\]/ism", $item["body"], $matches2);
preg_match_all("/\[img\=([^\]]*)\]([^[]*)\[\/img\]/ism", $item["body"], $matches3);
foreach (array_merge($matches1[3], $matches2[1], $matches3[1]) as $url) {
$components = parse_url($url);
if (!$components) {
continue;
}
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$cookiejar = tempnam(System::getTempPath(), 'cookiejar-mailstream-');
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try {
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$curlResult = DI::httpClient()->get($url, HttpClientAccept::DEFAULT, [HttpClientOptions::COOKIEJAR => $cookiejar]);
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if (!$curlResult->isSuccess()) {
Logger::debug('mailstream: fetch image url failed', [
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'url' => $url,
'item_id' => $item['id'],
'return_code' => $curlResult->getReturnCode()
]);
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continue;
}
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} catch (InvalidArgumentException $e) {
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Logger::error('exception fetching url', ['url' => $url, 'item_id' => $item['id']]);
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continue;
}
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$attachments[$url] = [
'data' => $curlResult->getBodyString(),
'guid' => hash('crc32', $url),
'filename' => basename($components['path']),
'type' => $curlResult->getContentType()
];
if (strlen($attachments[$url]['data'])) {
$item['body'] = str_replace($url, 'cid:' . $attachments[$url]['guid'], $item['body']);
continue;
}
}
return $attachments;
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}
/**
* Creates a sender to use in the email, either from the contact or the author of the item, or both
*
* @param array $item content of the item
*
* @return string sender suitable for use in the email
*/
function mailstream_sender(array $item): string
{
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$contact = Contact::getById($item['contact-id']);
if (DBA::isResult($contact)) {
if ($contact['name'] != $item['author-name']) {
return $contact['name'] . ' - ' . $item['author-name'];
}
}
return $item['author-name'];
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}
/**
* Converts a bbcode-encoded subject line into a plaintext version suitable for the subject line of an email
*
* @param string $subject bbcode-encoded subject line
* @param int $uri_id
*
* @return string plaintext subject line
*/
function mailstream_decode_subject(string $subject, int $uri_id): string
{
$html = BBCode::convertForUriId($uri_id, $subject);
if (!$html) {
return $subject;
}
$notags = strip_tags($html);
if (!$notags) {
return $subject;
}
$noentity = html_entity_decode($notags);
if (!$noentity) {
return $notags;
}
$nocodes = preg_replace_callback("/(&#[0-9]+;)/", function ($m) {
return mb_convert_encoding($m[1], 'UTF-8', 'HTML-ENTITIES');
}, $noentity);
if (!$nocodes) {
return $noentity;
}
$trimmed = trim($nocodes);
if (!$trimmed) {
return $nocodes;
}
return $trimmed;
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}
/**
* Creates a subject line to use in the email
*
* @param array $item content of the item
*
* @return string subject line suitable for use in the email
*/
function mailstream_subject(array $item): string
{
if ($item['title']) {
return mailstream_decode_subject($item['title'], $item['uri-id']);
}
$parent = $item['thr-parent'];
// Don't look more than 100 levels deep for a subject, in case of loops
for ($i = 0; ($i < 100) && $parent; $i++) {
$parent_item = Post::selectFirst(['thr-parent', 'title'], ['uri' => $parent]);
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if (!DBA::isResult($parent_item)) {
break;
}
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if ($parent_item['thr-parent'] === $parent) {
break;
}
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if ($parent_item['title']) {
return DI::l10n()->t('Re:') . ' ' . mailstream_decode_subject($parent_item['title'], $item['uri-id']);
}
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$parent = $parent_item['thr-parent'];
}
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$contact = Contact::selectFirst([], ['id' => $item['contact-id'], 'uid' => $item['uid']]);
if (!DBA::isResult($contact)) {
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Logger::error('no contact', [
'item' => $item['id'],
'plink' => $item['plink'],
'contact id' => $item['contact-id'],
'uid' => $item['uid']
]);
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return DI::l10n()->t("Friendica post");
}
if ($contact['network'] === 'dfrn') {
return DI::l10n()->t("Friendica post");
}
if ($contact['network'] === 'dspr') {
return DI::l10n()->t("Diaspora post");
}
if ($contact['network'] === 'face') {
$text = mailstream_decode_subject($item['body'], $item['uri-id']);
// For some reason these do show up in Facebook
$text = preg_replace('/\xA0$/', '', $text);
$subject = (strlen($text) > 150) ? (substr($text, 0, 140) . '...') : $text;
return preg_replace('/\\s+/', ' ', $subject);
}
if ($contact['network'] === 'feed') {
return DI::l10n()->t("Feed item");
}
if ($contact['network'] === 'mail') {
return DI::l10n()->t("Email");
}
return DI::l10n()->t("Friendica Item");
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}
/**
* Sends a message using PHPMailer
*
* @param string $message_id ID of the message (RFC 1036)
* @param array $item content of the item
* @param array $user results from the user table
*
* @return bool True if this message has been completed. False if it should be retried.
*/
function mailstream_send(string $message_id, array $item, array $user): bool
{
if (!is_array($item)) {
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Logger::error('item is empty', ['message_id' => $message_id]);
return false;
}
if (!$item['visible']) {
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Logger::debug('item not yet visible', ['item uri' => $item['uri']]);
return false;
}
if (!$message_id) {
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Logger::error('no message ID supplied', ['item uri' => $item['uri'], 'user email' => $user['email']]);
return true;
}
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require_once(dirname(__file__) . '/phpmailer/class.phpmailer.php');
$item['body'] = Post\Media::addAttachmentsToBody($item['uri-id'], $item['body']);
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$attachments = [];
mailstream_do_images($item, $attachments);
$frommail = DI::config()->get('mailstream', 'frommail');
if ($frommail == '') {
$frommail = 'friendica@localhost.local';
}
$address = DI::pConfig()->get($item['uid'], 'mailstream', 'address');
if (!$address) {
$address = $user['email'];
}
$mail = new PHPmailer();
try {
$mail->XMailer = 'Friendica Mailstream Addon';
$mail->SetFrom($frommail, mailstream_sender($item));
$mail->AddAddress($address, $user['username']);
$mail->MessageID = $message_id;
$mail->Subject = mailstream_subject($item);
if ($item['thr-parent'] != $item['uri']) {
$mail->addCustomHeader('In-Reply-To: ' . mailstream_generate_id($item['thr-parent']));
}
$mail->addCustomHeader('X-Friendica-Mailstream-URI: ' . $item['uri']);
if ($item['plink']) {
$mail->addCustomHeader('X-Friendica-Mailstream-Plink: ' . $item['plink']);
}
$encoding = 'base64';
foreach ($attachments as $url => $image) {
$mail->AddStringEmbeddedImage(
$image['data'],
$image['guid'],
$image['filename'],
$encoding,
$image['type']
);
}
$mail->IsHTML(true);
$mail->CharSet = 'utf-8';
$template = Renderer::getMarkupTemplate('mail.tpl', 'addon/mailstream/');
$mail->AltBody = BBCode::toPlaintext($item['body']);
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$item['body'] = BBCode::convertForUriId($item['uri-id'], $item['body'], BBCode::CONNECTORS);
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$item['url'] = DI::baseUrl() . '/display/' . $item['guid'];
$mail->Body = Renderer::replaceMacros($template, [
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'$upstream' => DI::l10n()->t('Upstream'),
'$uri' => DI::l10n()->t('URI'),
'$local' => DI::l10n()->t('Local'),
'$item' => $item
]);
$mail->Body = mailstream_html_wrap($mail->Body);
if (!$mail->Send()) {
throw new Exception($mail->ErrorInfo);
}
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Logger::debug('sent message', [
'message ID' => $mail->MessageID,
'subject' => $mail->Subject,
'address' => $address
]);
} catch (phpmailerException $e) {
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Logger::debug('PHPMailer exception sending message', ['id' => $message_id, 'error' => $e->errorMessage()]);
} catch (Exception $e) {
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Logger::debug('exception sending message', ['id' => $message_id, 'error' => $e->getMessage()]);
}
return true;
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}
/**
* Email tends to break if you send excessively long lines. To make
* bbcode's output suitable for transmission, we try to break things
* up so that lines are about 200 characters.
*
* @param string $text text to word wrap
* @return string wrapped text
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*/
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function mailstream_html_wrap(string &$text)
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{
$lines = str_split($text, 200);
for ($i = 0; $i < count($lines); $i++) {
$lines[$i] = preg_replace('/ /', "\n", $lines[$i], 1);
}
$text = implode($lines);
return $text;
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}
/**
* Form for configuring mailstream features for a user
*
* @param array $data Hook data array
* @throws \Friendica\Network\HTTPException\ServiceUnavailableException
*/
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function mailstream_addon_settings(array &$data)
{
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$enabled = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mailstream', 'enabled');
$address = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mailstream', 'address');
$nolikes = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mailstream', 'nolikes');
$attachimg = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'mailstream', 'attachimg');
$template = Renderer::getMarkupTemplate('settings.tpl', 'addon/mailstream/');
$html = Renderer::replaceMacros($template, [
'$enabled' => [
'mailstream_enabled',
DI::l10n()->t('Enabled'),
$enabled
],
'$address' => [
'mailstream_address',
DI::l10n()->t('Email Address'),
$address,
DI::l10n()->t('Leave blank to use your account email address')
],
'$nolikes' => [
'mailstream_nolikes',
DI::l10n()->t('Exclude Likes'),
$nolikes,
DI::l10n()->t('Check this to omit mailing "Like" notifications')
],
'$attachimg' => [
'mailstream_attachimg',
DI::l10n()->t('Attach Images'),
$attachimg,
DI::l10n()->t('Download images in posts and attach them to the email. ' .
'Useful for reading email while offline.')
],
]);
$data = [
'addon' => 'mailstream',
'title' => DI::l10n()->t('Mail Stream Settings'),
'html' => $html,
];
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}
/**
* Process data submitted to user's mailstream features form
* @param array $post POST data
* @return void
*/
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function mailstream_addon_settings_post(array $post)
{
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if (!DI::userSession()->getLocalUserId() || empty($post['mailstream-submit'])) {
return;
}
if ($post['mailstream_address'] != "") {
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'mailstream', 'address', $post['mailstream_address']);
} else {
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DI::pConfig()->delete(DI::userSession()->getLocalUserId(), 'mailstream', 'address');
}
if ($post['mailstream_nolikes']) {
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'mailstream', 'nolikes', $post['mailstream_enabled']);
} else {
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DI::pConfig()->delete(DI::userSession()->getLocalUserId(), 'mailstream', 'nolikes');
}
if ($post['mailstream_enabled']) {
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'mailstream', 'enabled', $post['mailstream_enabled']);
} else {
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DI::pConfig()->delete(DI::userSession()->getLocalUserId(), 'mailstream', 'enabled');
}
if ($post['mailstream_attachimg']) {
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'mailstream', 'attachimg', $post['mailstream_attachimg']);
} else {
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DI::pConfig()->delete(DI::userSession()->getLocalUserId(), 'mailstream', 'attachimg');
}
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}