338 lines
11 KiB
PHP
338 lines
11 KiB
PHP
<?php
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/**
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* Name: Discourse Mail Connector
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* Description: Improves mails from Discourse in mailing list mode
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* Version: 0.1
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* Author: Michael Vogel <http://pirati.ca/profile/heluecht>
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*
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*/
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use Friendica\App;
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use Friendica\Content\Text\Markdown;
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use Friendica\Core\Hook;
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use Friendica\Core\Logger;
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use Friendica\Core\Protocol;
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use Friendica\Core\Renderer;
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use Friendica\Database\DBA;
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use Friendica\DI;
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use Friendica\Model\Contact;
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use Friendica\Network\HTTPRequest;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Strings;
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/* Todo:
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* - Obtaining API tokens to be able to read non public posts as well
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* - Handling duplicates (possibly using some non visible marker)
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* - Fetching missing posts
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* - Fetch topic information
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* - Support mail free mode when write tokens are available
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* - Fix incomplete (relative) links (hosts are missing)
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*/
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function discourse_install()
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{
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Hook::register('email_getmessage', __FILE__, 'discourse_email_getmessage');
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Hook::register('connector_settings', __FILE__, 'discourse_settings');
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Hook::register('connector_settings_post', __FILE__, 'discourse_settings_post');
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}
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function discourse_settings(App $a, &$s)
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{
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if (!local_user()) {
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return;
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}
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$enabled = intval(DI::pConfig()->get(local_user(), 'discourse', 'enabled'));
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$t = Renderer::getMarkupTemplate('settings.tpl', 'addon/discourse/');
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$s .= Renderer::replaceMacros($t, [
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'$title' => DI::l10n()->t('Discourse'),
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'$enabled' => ['enabled', DI::l10n()->t('Enable processing of Discourse mailing list mails'), $enabled, DI::l10n()->t('If enabled, incoming mails from Discourse will be improved so they look much better. To make it work, you have to configure the e-mail settings in Friendica. You also have to enable the mailing list mode in Discourse. Then you have to add the Discourse mail account as contact.')],
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'$submit' => DI::l10n()->t('Save Settings'),
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]);
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}
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function discourse_settings_post(App $a)
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{
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if (!local_user() || empty($_POST['discourse-submit'])) {
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return;
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}
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DI::pConfig()->set(local_user(), 'discourse', 'enabled', intval($_POST['enabled']));
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}
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function discourse_email_getmessage(App $a, &$message)
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{
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if (empty($message['item']['uid'])) {
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return;
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}
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if (!DI::pConfig()->get($message['item']['uid'], 'discourse', 'enabled')) {
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return;
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}
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// We do assume that all Discourse servers are running with SSL
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if (preg_match('=topic/(.*\d)/(.*\d)@(.*)=', $message['item']['uri'], $matches) &&
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discourse_fetch_post_from_api($message, $matches[2], $matches[3])) {
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Logger::info('Fetched comment via API (message-id mode)', ['host' => $matches[3], 'topic' => $matches[1], 'post' => $matches[2]]);
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return;
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}
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if (preg_match('=topic/(.*\d)@(.*)=', $message['item']['uri'], $matches) &&
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discourse_fetch_topic_from_api($message, 'https://' . $matches[2], $matches[1], 1)) {
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Logger::info('Fetched starting post via API (message-id mode)', ['host' => $matches[2], 'topic' => $matches[1]]);
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return;
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}
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// Search in the text part for the link to the discourse entry and the text body
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if (!empty($message['text'])) {
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$message = discourse_get_text($message);
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}
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if (empty($message['item']['plink']) || !preg_match('=(http.*)/t/.*/(.*\d)/(.*\d)=', $message['item']['plink'], $matches)) {
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Logger::info('This is no Discourse post');
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return;
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}
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if (discourse_fetch_topic_from_api($message, $matches[1], $matches[2], $matches[3])) {
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Logger::info('Fetched post via API (plink mode)', ['host' => $matches[1], 'topic' => $matches[2], 'id' => $matches[3]]);
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return;
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}
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Logger::info('Fallback mode', ['plink' => $message['item']['plink']]);
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// Search in the HTML part for the discourse entry and the author profile
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if (!empty($message['html'])) {
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$message = discourse_get_html($message);
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}
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// Remove the title on comments, they don't serve any purpose there
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if ($message['item']['parent-uri'] != $message['item']['uri']) {
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unset($message['item']['title']);
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}
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}
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function discourse_fetch_post($host, $topic, $pid)
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{
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$url = $host . '/t/' . $topic . '/' . $pid . '.json';
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$curlResult = HTTPRequest::curl($url);
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if (!$curlResult->isSuccess()) {
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Logger::info('No success', ['url' => $url]);
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return false;
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}
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$raw = $curlResult->getBody();
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$data = json_decode($raw, true);
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$posts = $data['post_stream']['posts'];
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foreach($posts as $post) {
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if ($post['post_number'] != $pid) {
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/// @todo Possibly fetch missing posts here
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continue;
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}
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Logger::info('Got post data from topic', $post);
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return $post;
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}
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Logger::info('Post not found', ['host' => $host, 'topic' => $topic, 'pid' => $pid]);
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return false;
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}
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function discourse_fetch_topic_from_api(&$message, $host, $topic, $pid)
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{
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$post = discourse_fetch_post($host, $topic, $pid);
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if (empty($post)) {
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return false;
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}
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$message = discourse_process_post($message, $post, $host);
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return true;
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}
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function discourse_fetch_post_from_api(&$message, $post, $host)
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{
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$hostaddr = 'https://' . $host;
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$url = $hostaddr . '/posts/' . $post . '.json';
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$curlResult = HTTPRequest::curl($url);
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if (!$curlResult->isSuccess()) {
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return false;
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}
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$raw = $curlResult->getBody();
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$data = json_decode($raw, true);
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if (empty($data)) {
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return false;
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}
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$message = discourse_process_post($message, $data, $hostaddr);
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Logger::info('Got API data', $message);
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return true;
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}
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function discourse_get_user($post, $hostaddr)
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{
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$host = parse_url($hostaddr, PHP_URL_HOST);
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// Currently unused contact fields:
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// - display_username
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// - user_id
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$contact = [];
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$contact['uid'] = 0;
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$contact['network'] = Protocol::DISCOURSE;
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$contact['name'] = $contact['nick'] = $post['username'];
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if (!empty($post['name'])) {
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$contact['name'] = $post['name'];
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}
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$contact['about'] = $post['user_title'];
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if (parse_url($post['avatar_template'], PHP_URL_SCHEME)) {
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$contact['photo'] = str_replace('{size}', '300', $post['avatar_template']);
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} else {
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$contact['photo'] = $hostaddr . str_replace('{size}', '300', $post['avatar_template']);
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}
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$contact['addr'] = $contact['nick'] . '@' . $host;
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$contact['contact-type'] = Contact::TYPE_PERSON;
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$contact['url'] = $hostaddr . '/u/' . $contact['nick'];
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$contact['nurl'] = Strings::normaliseLink($contact['url']);
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$contact['baseurl'] = $hostaddr;
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Logger::info('Contact', $contact);
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$contact['id'] = Contact::getIdForURL($contact['url'], 0, false, $contact);
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if (!empty($contact['id'])) {
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$avatar = $contact['photo'];
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unset($contact['photo']);
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DBA::update('contact', $contact, ['id' => $contact['id']]);
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Contact::updateAvatar($avatar, 0, $contact['id']);
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$contact['photo'] = $avatar;
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}
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return $contact;
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}
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function discourse_process_post($message, $post, $hostaddr)
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{
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$host = parse_url($hostaddr, PHP_URL_HOST);
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$message['html'] = $post['cooked'];
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$contact = discourse_get_user($post, $hostaddr);
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$message['item']['author-id'] = $contact['id'];
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$message['item']['author-link'] = $contact['url'];
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$message['item']['author-name'] = $contact['name'];
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$message['item']['author-avatar'] = $contact['photo'];
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$message['item']['created'] = DateTimeFormat::utc($post['created_at']);
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$message['item']['plink'] = $hostaddr . '/t/' . $post['topic_slug'] . '/' . $post['topic_id'] . '/' . $post['post_number'];
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if ($post['post_number'] == 1) {
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$message['item']['parent-uri'] = $message['item']['uri'] = 'topic/' . $post['topic_id'] . '@' . $host;
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// Remove the Discourse forum name from the subject
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$pattern = '=\[.*\].*\s(\[.*\].*)=';
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if (preg_match($pattern, $message['item']['title'])) {
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$message['item']['title'] = preg_replace($pattern, '$1', $message['item']['title']);
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}
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/// @ToDo Fetch thread information
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} else {
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$message['item']['uri'] = 'topic/' . $post['topic_id'] . '/' . $post['id'] . '@' . $host;
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unset($message['item']['title']);
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if (empty($post['reply_to_post_number']) || $post['reply_to_post_number'] == 1) {
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$message['item']['parent-uri'] = 'topic/' . $post['topic_id'] . '@' . $host;
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} else {
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$reply = discourse_fetch_post($hostaddr, $post['topic_id'], $post['reply_to_post_number']);
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$message['item']['parent-uri'] = 'topic/' . $post['topic_id'] . '/' . $reply['id'] . '@' . $host;
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}
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}
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return $message;
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}
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function discourse_get_html($message)
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{
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$doc = new DOMDocument();
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$doc2 = new DOMDocument();
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$doc->preserveWhiteSpace = false;
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$html = mb_convert_encoding($message['html'], 'HTML-ENTITIES', "UTF-8");
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@$doc->loadHTML($html, LIBXML_HTML_NODEFDTD);
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$xpath = new DomXPath($doc);
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// Fetch the first 'div' before the 'hr' - hopefully this fits for all systems
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$result = $xpath->query("//hr//preceding::div[1]");
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$div = $doc2->importNode($result->item(0), true);
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$doc2->appendChild($div);
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$message['html'] = $doc2->saveHTML();
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Logger::info('Found html body', ['html' => $message['html']]);
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$profile = discourse_get_profile($xpath);
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if (!empty($profile['url'])) {
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Logger::info('Found profile', $profile);
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$message['item']['author-id'] = Contact::getIdForURL($profile['url'], 0, false, $profile);
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$message['item']['author-link'] = $profile['url'];
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$message['item']['author-name'] = $profile['name'];
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$message['item']['author-avatar'] = $profile['photo'];
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}
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return $message;
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}
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function discourse_get_text($message)
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{
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$text = $message['text'];
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$text = str_replace("\r", '', $text);
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$pos = strpos($text, "\n---\n");
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if ($pos == 0) {
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Logger::info('No separator found', ['text' => $text]);
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return $message;
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}
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$message['text'] = trim(substr($text, 0, $pos));
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Logger::info('Found text body', ['text' => $message['text']]);
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$message['text'] = Markdown::toBBCode($message['text']);
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$text = substr($text, $pos);
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Logger::info('Found footer', ['text' => $text]);
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if (preg_match('=\((http.*/t/.*/.*\d/.*\d)\)=', $text, $link)) {
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$message['item']['plink'] = $link[1];
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Logger::info('Found plink', ['plink' => $message['item']['plink']]);
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}
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return $message;
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}
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function discourse_get_profile($xpath)
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{
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$profile = [];
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$list = $xpath->query("//td//following::img");
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foreach ($list as $node) {
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$attr = [];
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foreach ($node->attributes as $attribute) {
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$attr[$attribute->name] = $attribute->value;
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}
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if (!empty($attr['src']) && !empty($attr['title'])
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&& !empty($attr['width']) && !empty($attr['height'])
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&& ($attr['width'] == $attr['height'])) {
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$profile = ['photo' => $attr['src'], 'name' => $attr['title']];
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break;
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}
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}
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$list = $xpath->query("//td//following::a");
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foreach ($list as $node) {
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if (!empty(trim($node->textContent)) && $node->attributes->length) {
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$attr = [];
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foreach ($node->attributes as $attribute) {
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$attr[$attribute->name] = $attribute->value;
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}
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if (!empty($attr['href']) && (strpos($attr['href'], '/' . $profile['name']))) {
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$profile['url'] = $attr['href'];
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break;
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}
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}
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}
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return $profile;
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}
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