mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-11-23 07:37:35 +00:00
398 lines
13 KiB
PHP
398 lines
13 KiB
PHP
<?php
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class TelegramBridge extends BridgeAbstract
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{
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const NAME = 'Telegram Bridge';
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const URI = 'https://t.me';
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const DESCRIPTION = 'Returns newest posts from a *public* Telegram channel';
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const MAINTAINER = 'VerifiedJoseph';
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const PARAMETERS = [[
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'username' => [
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'name' => 'Username',
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'type' => 'text',
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'required' => true,
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'exampleValue' => '@rssbridge',
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]
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]
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];
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const TEST_DETECT_PARAMETERS = [
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'https://t.me/s/rssbridge' => ['username' => 'rssbridge'],
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'https://t.me/rssbridge' => ['username' => 'rssbridge'],
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'http://t.me/rssbridge' => ['username' => 'rssbridge'],
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'https://telegram.me/s/rssbridge' => ['username' => 'rssbridge'],
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'https://telegram.me/rssbridge' => ['username' => 'rssbridge'],
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'http://telegram.me/rssbridge' => ['username' => 'rssbridge'],
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'http://rssbridge.t.me/' => ['username' => 'rssbridge'],
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'https://rssbridge.t.me/' => ['username' => 'rssbridge'],
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];
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const CACHE_TIMEOUT = 60 * 15; // 15 mins
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private $feedName = '';
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private $enclosures = [];
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private $itemTitle = '';
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private const BACKGROUND_IMAGE_REGEX = "/background-image:url\('(.*)'\)/";
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public function collectData()
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{
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$html = getSimpleHTMLDOM($this->getURI());
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$channelTitle = $html->find('div.tgme_channel_info_header_title span', 0)->plaintext ?? '';
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$channelTitle = htmlspecialchars_decode($channelTitle, ENT_QUOTES);
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$this->feedName = $channelTitle . ' (@' . $this->normalizeUsername() . ')';
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$posts = $html->find('div.tgme_widget_message_wrap.js-widget_message_wrap');
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if (!$channelTitle && !$posts) {
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throw new \Exception('Unable to find channel. The channel is non-existing or non-public.');
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}
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foreach ($posts as $messageDiv) {
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$this->itemTitle = '';
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$this->enclosures = [];
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$item = [];
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$item['uri'] = $messageDiv->find('a.tgme_widget_message_date', 0)->href;
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$item['content'] = $this->processContent($messageDiv);
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$item['title'] = $this->itemTitle;
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$item['timestamp'] = $messageDiv->find('span.tgme_widget_message_meta', 0)->find('time', 0)->datetime;
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$item['enclosures'] = $this->enclosures;
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$messageOwner = $messageDiv->find('a.tgme_widget_message_owner_name', 0);
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if ($messageOwner) {
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$item['author'] = html_entity_decode(trim($messageOwner->plaintext), ENT_QUOTES);
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}
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$this->items[] = $item;
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}
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$this->items = array_reverse($this->items);
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}
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private function processContent($messageDiv)
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{
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$message = '';
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$notSupported = $messageDiv->find('div.message_media_not_supported_wrap', 0);
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if ($notSupported) {
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// For unknown reasons, the telegram preview page omits the content of this post
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$message = 'RSS-Bridge was unable to find the content of this post.<br><br>' . $notSupported->innertext;
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}
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if ($messageDiv->find('div.tgme_widget_message_forwarded_from', 0)) {
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$message .= $messageDiv->find('div.tgme_widget_message_forwarded_from', 0)->innertext . '<br><br>';
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}
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if ($messageDiv->find('a.tgme_widget_message_reply', 0)) {
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$message .= $this->processReply($messageDiv);
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}
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if ($messageDiv->find('div.tgme_widget_message_sticker_wrap', 0)) {
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$message .= $this->processSticker($messageDiv);
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}
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if ($messageDiv->find('div.tgme_widget_message_poll', 0)) {
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$message .= $this->processPoll($messageDiv);
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}
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if ($messageDiv->find('video', 0)) {
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$message .= $this->processVideo($messageDiv);
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}
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if ($messageDiv->find('a.tgme_widget_message_photo_wrap', 0)) {
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$message .= $this->processPhoto($messageDiv);
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}
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if ($messageDiv->find('a.not_supported', 0)) {
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$message .= $this->processNotSupported($messageDiv);
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}
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if ($messageDiv->find('div.tgme_widget_message_text.js-message_text', 0)) {
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$message .= $messageDiv->find('div.tgme_widget_message_text.js-message_text', 0);
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$this->itemTitle = $this->ellipsisTitle(
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$messageDiv->find('div.tgme_widget_message_text.js-message_text', 0)->plaintext
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);
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}
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if ($messageDiv->find('div.tgme_widget_message_document', 0)) {
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$message .= $this->processAttachment($messageDiv);
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}
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if ($messageDiv->find('a.tgme_widget_message_link_preview', 0)) {
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$message .= $this->processLinkPreview($messageDiv);
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}
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if ($messageDiv->find('a.tgme_widget_message_location_wrap', 0)) {
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$message .= $this->processLocation($messageDiv);
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}
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return $message;
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}
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public function getURI()
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{
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$username = $this->getInput('username');
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if ($username) {
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return self::URI . '/s/' . $this->normalizeUsername();
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}
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return parent::getURI();
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}
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public function getName()
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{
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if ($this->feedName) {
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return $this->feedName . ' - Telegram';
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}
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return parent::getName();
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}
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private function processReply($messageDiv)
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{
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$reply = $messageDiv->find('a.tgme_widget_message_reply', 0);
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$author = $reply->find('span.tgme_widget_message_author_name', 0)->plaintext;
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$text = '';
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if ($reply->find('div.tgme_widget_message_metatext', 0)) {
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$text = $reply->find('div.tgme_widget_message_metatext', 0)->innertext;
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}
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if ($reply->find('div.tgme_widget_message_text', 0)) {
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$text = $reply->find('div.tgme_widget_message_text', 0)->innertext;
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}
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return <<<EOD
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<blockquote>{$author}<br>
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{$text}
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<a href="{$reply->href}">{$reply->href}</a></blockquote><hr>
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EOD;
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}
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private function processSticker($messageDiv)
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{
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted a sticker';
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}
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$stickerDiv = $messageDiv->find('div.tgme_widget_message_sticker_wrap', 0);
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if ($stickerDiv->find('picture', 0)) {
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$stickerDiv->find('picture', 0)->find('div', 0)->style = '';
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$stickerDiv->find('picture', 0)->style = '';
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return $stickerDiv;
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}
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$var = $stickerDiv->find('i', 0);
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if ($var) {
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$style = $var->style;
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if (preg_match(self::BACKGROUND_IMAGE_REGEX, $style, $sticker)) {
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return <<<EOD
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<a href="{$stickerDiv->children(0)->herf}"><img src="{$sticker[1]}"></a>
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EOD;
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}
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}
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return '';
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}
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private function processPoll($messageDiv)
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{
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$poll = $messageDiv->find('div.tgme_widget_message_poll', 0);
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$title = $poll->find('div.tgme_widget_message_poll_question', 0)->plaintext;
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$type = $poll->find('div.tgme_widget_message_poll_type', 0)->plaintext;
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if (!$this->itemTitle) {
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$this->itemTitle = $title;
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}
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$pollOptions = '<ul>';
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foreach ($poll->find('div.tgme_widget_message_poll_option') as $option) {
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$pollOptions .= '<li>' . $option->children(0)->plaintext . ' - ' .
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$option->find('div.tgme_widget_message_poll_option_text', 0)->plaintext . '</li>';
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}
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$pollOptions .= '</ul>';
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return <<<EOD
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{$title}<br><small>$type</small><br>{$pollOptions}
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EOD;
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}
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private function processLinkPreview($messageDiv)
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{
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$image = '';
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$title = '';
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$site = '';
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$description = '';
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$preview = $messageDiv->find('a.tgme_widget_message_link_preview', 0);
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if (trim($preview->innertext) === '') {
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return '';
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}
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if (
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$preview->find('i', 0) &&
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preg_match(self::BACKGROUND_IMAGE_REGEX, $preview->find('i', 0)->style, $photo)
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) {
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$image = '<img src="' . $photo[1] . '"/>';
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}
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if ($preview->find('div.link_preview_title', 0)) {
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$title = $preview->find('div.link_preview_title', 0)->plaintext;
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}
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if ($preview->find('div.link_preview_site_name', 0)) {
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$site = $preview->find('div.link_preview_site_name', 0)->plaintext;
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}
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if ($preview->find('div.link_preview_description', 0)) {
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$description = $preview->find('div.link_preview_description', 0)->plaintext;
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}
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return <<<EOD
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<blockquote><a href="{$preview->href}">{$image}</a><br><a href="{$preview->href}">
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{$title} - {$site}</a><br>{$description}</blockquote>
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EOD;
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}
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private function processVideo($messageDiv)
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{
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted a video';
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}
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if ($messageDiv->find('i.tgme_widget_message_video_thumb')) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('i.tgme_widget_message_video_thumb', 0)->style, $photo);
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} elseif ($messageDiv->find('i.link_preview_video_thumb')) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('i.link_preview_video_thumb', 0)->style, $photo);
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} elseif ($messageDiv->find('i.tgme_widget_message_roundvideo_thumb')) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('i.tgme_widget_message_roundvideo_thumb', 0)->style, $photo);
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} else {
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// Not all videos have a poster image
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$photo = [null, null];
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}
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$this->enclosures[] = $photo[1];
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// Intentionally omitting preload="none" on <video>
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return <<<EOD
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<video controls="" poster="{$photo[1]}" style="max-width:100%;">
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<source src="{$messageDiv->find('video', 0)->src}" type="video/mp4">
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</video>
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EOD;
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}
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private function processPhoto($messageDiv)
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{
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted a photo';
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}
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$photos = '';
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foreach ($messageDiv->find('a.tgme_widget_message_photo_wrap') as $photoWrap) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $photoWrap->style, $photo);
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$photos .= <<<EOD
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<a href="{$photoWrap->href}"><img src="{$photo[1]}"/></a><br>
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EOD;
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}
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return $photos;
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}
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private function processNotSupported($messageDiv)
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{
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted a video';
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}
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if ($messageDiv->find('i.tgme_widget_message_video_thumb')) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('i.tgme_widget_message_video_thumb', 0)->style, $photo);
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} elseif ($messageDiv->find('i.link_preview_video_thumb')) {
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('i.link_preview_video_thumb', 0)->style, $photo);
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} else {
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// Unsupported content ususally don't have a preview image
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$photo = [null, null];
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}
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return <<<EOD
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<a href="{$messageDiv->find('a.not_supported', 0)->href}">
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{$messageDiv->find('div.message_media_not_supported_label', 0)->innertext}<br><br>
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{$messageDiv->find('span.message_media_view_in_telegram', 0)->innertext}<br><br>
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<img src="{$photo[1]}"/></a>
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EOD;
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}
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private function processAttachment($messageDiv)
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{
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$attachments = 'File attachments:<br>';
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted an attachment';
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}
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foreach ($messageDiv->find('div.tgme_widget_message_document') as $document) {
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$attachments .= <<<EOD
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{$document->find('div.tgme_widget_message_document_title', 0)->plaintext} -
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{$document->find('div.tgme_widget_message_document_extra', 0)->plaintext}<br>
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EOD;
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}
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return $attachments;
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}
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private function processLocation($messageDiv)
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{
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if (!$this->itemTitle) {
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$this->itemTitle = '@' . $this->normalizeUsername() . ' posted a location';
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}
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preg_match(self::BACKGROUND_IMAGE_REGEX, $messageDiv->find('div.tgme_widget_message_location', 0)->style, $image);
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$link = $messageDiv->find('a.tgme_widget_message_location_wrap', 0)->href;
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return <<<EOD
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<a href="{$link}"><img src="{$image[1]}"></a>
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EOD;
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}
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// todo: extract truncate
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private function ellipsisTitle($text)
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{
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$length = 100;
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if (strlen($text) > $length) {
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$text = explode('<br>', wordwrap($text, $length, '<br>'));
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return $text[0] . '...';
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}
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return $text;
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}
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private function normalizeUsername()
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{
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// todo: can be replaced with ltrim($username, '@');
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$username = $this->getInput('username');
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if (substr($username, 0, 1) === '@') {
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return substr($username, 1);
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}
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return $username;
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}
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public function detectParameters($url)
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{
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$detectParamsRegex = '/^https?:\/\/(?:(?:t|telegram)\.me\/(?:s\/)?([\w]+)|([\w]+)\.t\.me\/?)$/';
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$params = [];
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if (preg_match($detectParamsRegex, $url, $matches) > 0) {
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if ($matches[1] !== '') {
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$params['username'] = $matches[1];
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}
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if (isset($matches[2]) && $matches[2] !== '') {
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$params['username'] = $matches[2];
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}
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return $params;
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}
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return null;
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}
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}
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