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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: 1.1
* Author: Matthew Exon <http://mat.exon.name>
*/
use Friendica\Content\Text\BBCode;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Item;
use Friendica\Model\Post;
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('cron', 'addon/mailstream/mailstream.php', 'mailstream_cron');
if (DI::config()->get('mailstream', 'dbversion') == '0.1') {
q('ALTER TABLE `mailstream_item` DROP INDEX `uid`');
q('ALTER TABLE `mailstream_item` DROP INDEX `contact-id`');
q('ALTER TABLE `mailstream_item` DROP INDEX `plink`');
q('ALTER TABLE `mailstream_item` CHANGE `plink` `uri` char(255) NOT NULL');
DI::config()->set('mailstream', 'dbversion', '0.2');
}
if (DI::config()->get('mailstream', 'dbversion') == '0.2') {
q('DELETE FROM `pconfig` WHERE `cat` = "mailstream" AND `k` = "delay"');
DI::config()->set('mailstream', 'dbversion', '0.3');
}
if (DI::config()->get('mailstream', 'dbversion') == '0.3') {
q('ALTER TABLE `mailstream_item` CHANGE `created` `created` timestamp NOT NULL DEFAULT now()');
q('ALTER TABLE `mailstream_item` CHANGE `completed` `completed` timestamp NULL DEFAULT NULL');
DI::config()->set('mailstream', 'dbversion', '0.4');
}
if (DI::config()->get('mailstream', 'dbversion') == '0.4') {
q('ALTER TABLE `mailstream_item` CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin');
DI::config()->set('mailstream', 'dbversion', '0.5');
}
if (DI::config()->get('mailstream', 'dbversion') == '0.5') {
DI::config()->set('mailstream', 'dbversion', '1.0');
}
if (DI::config()->get('retriever', 'dbversion') != '1.0') {
$schema = file_get_contents(dirname(__file__).'/database.sql');
$arr = explode(';', $schema);
foreach ($arr as $a) {
$r = q($a);
}
DI::config()->set('mailstream', 'dbversion', '1.0');
}
}
/**
* This funciton indicates a module that can be wrapped in the LegacyModule class
*/
function mailstream_module()
{
}
/**
* Adds an item in "addon features" in the admin menu of the site
*
* @param Friendica\App $a App object (unused)
* @param string $o HTML form data
*/
function mailstream_addon_admin(&$a, &$o)
{
$frommail = DI::config()->get('mailstream', 'frommail');
$template = Renderer::getMarkupTemplate('admin.tpl', 'addon/mailstream/');
$config = ['frommail',
DI::l10n()->t('From Address'),
$frommail,
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')]);
}
/**
* 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']);
}
}
/**
* Creates a message ID for a post URI in accordance with RFC 1036
* See also http://www.jwz.org/doc/mid.html
*
* @param string $uri the URI to be converted to a message ID
*
* @return string the created message ID
*/
function mailstream_generate_id($uri)
{
$host = DI::baseUrl()->getHostname();
$resource = hash('md5', $uri);
$message_id = "<" . $resource . "@" . $host . ">";
Logger::debug('mailstream: Generated message ID ' . $message_id . ' for URI ' . $uri);
return $message_id;
}
/**
* Called when either a local or remote post is created. Creates a
* record in the mailstream_item table to track this email, and then
* immediately attempts to send it
*
* @param Friendica\App $a App object (unused)
* @param array $item content of the item (may or may not already be stored in the item table)
*/
function mailstream_post_hook(&$a, &$item)
{
if (!DI::pConfig()->get($item['uid'], 'mailstream', 'enabled')) {
Logger::debug('mailstream: not enabled for item ' . $item['id']);
return;
}
if (!$item['uid']) {
Logger::debug('mailstream: no uid for item ' . $item['id']);
return;
}
if (!$item['contact-id']) {
Logger::debug('mailstream: no contact-id for item ' . $item['id']);
return;
}
if (!$item['uri']) {
Logger::debug('mailstream: no uri for item ' . $item['id']);
return;
}
if (!$item['plink']) {
Logger::debug('mailstream: no plink for item ' . $item['id']);
return;
}
if (DI::pConfig()->get($item['uid'], 'mailstream', 'nolikes')) {
if ($item['verb'] == Activity::LIKE) {
Logger::debug('mailstream: like item ' . $item['id']);
return;
}
}
$message_id = mailstream_generate_id($item['uri']);
q(
"INSERT INTO `mailstream_item` (`uid`, `contact-id`, `uri`, `message-id`) " .
"VALUES (%d, '%s', '%s', '%s')",
intval($item['uid']),
intval($item['contact-id']),
DBA::escape($item['uri']),
DBA::escape($message_id)
);
$r = q(
'SELECT * FROM `mailstream_item` WHERE `uid` = %d AND `contact-id` = %d AND `uri` = "%s"',
intval($item['uid']),
intval($item['contact-id']),
DBA::escape($item['uri'])
);
if (count($r) != 1) {
Logger::info('mailstream_post_remote_hook: Unexpected number of items returned from mailstream_item');
return;
}
$ms_item = $r[0];
Logger::debug('mailstream_post_remote_hook: created mailstream_item ' . $ms_item['id'] .
' for item ' . $item['uri'] . ' ' . $item['uid'] . ' ' . $item['contact-id']);
$user = mailstream_get_user($item['uid']);
if (!$user) {
Logger::info('mailstream_post_remote_hook: no user ' . $item['uid']);
return;
}
mailstream_send($ms_item['message-id'], $item, $user);
}
/**
* Converts a user ID into a full user record from the corresponding database table
*
* @param int $uid ID of the user to query
*
* @return array results from the user table
*/
function mailstream_get_user($uid)
{
$r = q('SELECT * FROM `user` WHERE `uid` = %d', intval($uid));
if (count($r) != 1) {
Logger::info('mailstream_post_remote_hook: Unexpected number of users returned');
return;
}
return $r[0];
}
/**
* 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 $attachments contains an array element for each attachment to add to the email
*
* @return array new value of the attachments table (results are also stored in the reference parameter)
*/
function mailstream_do_images(&$item, &$attachments)
{
if (!DI::pConfig()->get($item['uid'], 'mailstream', 'attachimg')) {
return;
}
$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;
}
$cookiejar = tempnam(get_temppath(), 'cookiejar-mailstream-');
$curlResult = DI::httpRequest()->fetchFull($url, 0, '', $cookiejar);
$attachments[$url] = [
'data' => $curlResult->getBody(),
'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;
}
/**
* Creates a sender to use in the email, either from the contact or the author of the item, or both
*
* @param array $item content of the item
*
* @return string sender suitable for use in the email
*/
function mailstream_sender($item)
{
$r = q('SELECT * FROM `contact` WHERE `id` = %d', $item['contact-id']);
if (DBA::isResult($r)) {
$contact = $r[0];
if ($contact['name'] != $item['author-name']) {
return $contact['name'] . ' - ' . $item['author-name'];
}
}
return $item['author-name'];
}
/**
* Converts a bbcode-encoded subject line into a plaintext version suitable for the subject line of an email
*
* @param string $subject bbcode-encoded subject line
*
* @return string plaintext subject line
*/
function mailstream_decode_subject($subject)
{
$html = BBCode::convert($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;
}
/**
* Creates a subject line to use in the email
*
* @param array $item content of the item
*
* @return string subject line suitable for use in the email
*/
function mailstream_subject($item)
{
if ($item['title']) {
return mailstream_decode_subject($item['title']);
}
$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' => $parent]);
if (!DBA::isResult($parent_item)) {
break;
}
if ($parent_item['thr-parent'] === $parent) {
break;
}
if ($parent_item['title']) {
return DI::l10n()->t('Re:') . ' ' . mailstream_decode_subject($parent_item['title']);
}
$parent = $parent_item['thr-parent'];
}
$r = q(
"SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d",
intval($item['contact-id']),
intval($item['uid'])
);
if (!DBA::isResult($r)) {
Logger::error(
'mailstream_subject no contact for item',
['item id' => $item['id'], 'plink' => $item['plink'], 'contact id' => $item['contact-id'], 'uid' => $item['uid']]
);
return DI::l10n()->t("Friendica post");
}
$contact = $r[0];
if ($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']);
// 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");
}
/**
* Sends a message using PHPMailer
*
* @param string $message_id ID of the message (RFC 1036)
* @param array $item content of the item
* @param array $user results from the user table
*/
function mailstream_send($message_id, $item, $user)
{
if (!$item['visible']) {
return;
}
if (!$message_id) {
return;
}
require_once(dirname(__file__).'/phpmailer/class.phpmailer.php');
$attachments = [];
mailstream_do_images($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']);
$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']);
$item['body'] = BBCode::convert($item['body'], false, BBCode::CONNECTORS);
$item['url'] = DI::baseUrl()->get() . '/display/' . $item['guid'];
$mail->Body = Renderer::replaceMacros($template, [
'$upstream' => DI::l10n()->t('Upstream'),
'$local' => DI::l10n()->t('Local'),
'$item' => $item]);
mailstream_html_wrap($mail->Body);
if (!$mail->Send()) {
throw new Exception($mail->ErrorInfo);
}
Logger::debug('mailstream_send sent message ' . $mail->MessageID . ' ' . $mail->Subject);
} catch (phpmailerException $e) {
Logger::debug('mailstream_send PHPMailer exception sending message ' . $message_id . ': ' . $e->errorMessage());
} catch (Exception $e) {
Logger::debug('mailstream_send exception sending message ' . $message_id . ': ' . $e->getMessage());
}
// In case of failure, still set the item to completed. Otherwise
// we'll just try to send it over and over again and it'll fail
// every time.
q('UPDATE `mailstream_item` SET `completed` = now() WHERE `message-id` = "%s"', DBA::escape($message_id));
}
/**
* 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 $text text to word wrap - modified in-place
*/
function mailstream_html_wrap(&$text)
{
$lines = str_split($text, 200);
for ($i = 0; $i < count($lines); $i++) {
$lines[$i] = preg_replace('/ /', "\n", $lines[$i], 1);
}
$text = implode($lines);
}
/**
* Cron job for the mailstream plugin. Sends delayed messages and cleans up old successful entries from the table.
*/
function mailstream_cron()
{
// Only process items older than an hour in cron. This is because
// we want to give mailstream_post_remote_hook a fair chance to
// send the email itself before cron jumps in. Only if
// mailstream_post_remote_hook fails for some reason will this get
// used, and in that case it's worth holding off a bit anyway.
$query = <<< EOT
SELECT
`mailstream_item`.`message-id`,
`mailstream_item`.`uri`,
`post-user-view`.`id`
FROM
`mailstream_item`
JOIN
`post-user-view`
ON (
`mailstream_item`.`uid` = `post-user-view`.`uid` AND
`mailstream_item`.`uri` = `post-user-view`.`uri` AND
`mailstream_item`.`contact-id` = `post-user-view`.`contact-id`
)
WHERE
`mailstream_item`.`completed` IS NULL AND
`mailstream_item`.`created` < DATE_SUB(NOW(), INTERVAL 1 HOUR) AND
`post-user-view`.`visible` = 1
ORDER BY `mailstream_item`.`created`
LIMIT 100
EOT;
$ms_item_ids = q($query);
if (DBA::isResult($ms_item_ids)) {
Logger::debug('mailstream_cron processing ' . count($ms_item_ids) . ' items');
foreach ($ms_item_ids as $ms_item_id) {
if (!$ms_item_id['message-id'] || !strlen($ms_item_id['message-id'])) {
Logger::info('mailstream_cron: Item ' . $ms_item_id['id'] .
' URI ' . $ms_item_id['uri'] . ' has no message-id');
}
$item = Post::selectFirst([], ['id' => $ms_item_id['id']]);
$users = q("SELECT * FROM `user` WHERE `uid` = %d", intval($item['uid']));
$user = $users[0];
if ($user && $item) {
mailstream_send($ms_item_id['message-id'], $item, $user);
} else {
Logger::info('mailstream_cron: Unable to find item ' . $ms_item_id['id']);
q(
"UPDATE `mailstream_item` SET `completed` = now() WHERE `message-id` = %d",
intval($ms_item_id['message-id'])
);
}
}
}
mailstream_tidy();
}
/**
* Form for configuring mailstream features for a user
*
* @param Friendica\App $a App object
* @param string $o HTML form data
*/
function mailstream_addon_settings(&$a, &$s)
{
$enabled = DI::pConfig()->get(local_user(), 'mailstream', 'enabled');
$address = DI::pConfig()->get(local_user(), 'mailstream', 'address');
$nolikes = DI::pConfig()->get(local_user(), 'mailstream', 'nolikes');
$attachimg= DI::pConfig()->get(local_user(), 'mailstream', 'attachimg');
$template = Renderer::getMarkupTemplate('settings.tpl', 'addon/mailstream/');
$s .= Renderer::replaceMacros($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'),
$attachimg,
DI::l10n()->t("Download images in posts and attach them to the email. " .
"Useful for reading email while offline.")],
'$title' => DI::l10n()->t('Mail Stream Settings'),
'$submit' => DI::l10n()->t('Save Settings')]);
}
/**
* Process data submitted to user's mailstream features form
*/
function mailstream_addon_settings_post()
{
if ($_POST['mailstream_address'] != "") {
DI::pConfig()->set(local_user(), 'mailstream', 'address', $_POST['mailstream_address']);
} else {
DI::pConfig()->delete(local_user(), 'mailstream', 'address');
}
if ($_POST['mailstream_nolikes']) {
DI::pConfig()->set(local_user(), 'mailstream', 'nolikes', $_POST['mailstream_enabled']);
} else {
DI::pConfig()->delete(local_user(), 'mailstream', 'nolikes');
}
if ($_POST['mailstream_enabled']) {
DI::pConfig()->set(local_user(), 'mailstream', 'enabled', $_POST['mailstream_enabled']);
} else {
DI::pConfig()->delete(local_user(), 'mailstream', 'enabled');
}
if ($_POST['mailstream_attachimg']) {
DI::pConfig()->set(local_user(), 'mailstream', 'attachimg', $_POST['mailstream_attachimg']);
} else {
DI::pConfig()->delete(local_user(), 'mailstream', 'attachimg');
}
}
/**
* Deletes records from the mailstream_item table older than one year
*/
function mailstream_tidy()
{
$query = <<< EOT
SELECT
id
FROM
mailstream_item
WHERE
completed IS NOT NULL AND
completed < DATE_SUB(NOW(), INTERVAL 1 YEAR)
EOT;
$r = q($query);
foreach ($r as $rr) {
q('DELETE FROM mailstream_item WHERE id = %d', intval($rr['id']));
}
Logger::debug('mailstream_tidy: deleted ' . count($r) . ' old items');
}
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