mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-11-23 07:37:35 +00:00
331 lines
10 KiB
PHP
331 lines
10 KiB
PHP
<?php
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class YouTubeCommunityTabBridge extends BridgeAbstract
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{
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const NAME = 'YouTube Community Tab Bridge';
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const URI = 'https://www.youtube.com';
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const DESCRIPTION = 'Returns posts from a channel\'s community tab';
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const MAINTAINER = 'VerifiedJoseph';
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const PARAMETERS = [
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'By channel ID' => [
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'channel' => [
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'name' => 'Channel ID',
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'type' => 'text',
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'required' => true,
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'exampleValue' => 'UCULkRHBdLC5ZcEQBaL0oYHQ'
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]
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],
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'By username' => [
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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' => 'YouTubeUK'
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],
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]
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];
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const CACHE_TIMEOUT = 3600; // 1 hour
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private $feedUrl = '';
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private $feedName = '';
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private $itemTitle = '';
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private $urlRegex = '/youtube\.com\/(channel|user|c)\/([\w]+)\/community/';
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private $jsonRegex = '/var ytInitialData = ([^<]*);<\/script>/';
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public function detectParameters($url)
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{
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$params = [];
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if (preg_match($this->urlRegex, $url, $matches)) {
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if ($matches[1] === 'channel') {
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$params['context'] = 'By channel ID';
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$params['channel'] = $matches[2];
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}
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if ($matches[1] === 'user') {
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$params['context'] = 'By username';
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$params['username'] = $matches[2];
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}
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return $params;
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}
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return null;
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}
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public function collectData()
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{
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if (is_null($this->getInput('username')) === false) {
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try {
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$this->feedUrl = $this->buildCommunityUri($this->getInput('username'), 'c');
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$html = getSimpleHTMLDOM($this->feedUrl);
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} catch (Exception $e) {
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$this->feedUrl = $this->buildCommunityUri($this->getInput('username'), 'user');
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$html = getSimpleHTMLDOM($this->feedUrl);
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}
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} else {
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$this->feedUrl = $this->buildCommunityUri($this->getInput('channel'), 'channel');
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$html = getSimpleHTMLDOM($this->feedUrl);
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}
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$json = $this->extractJson($html->find('html', 0)->innertext);
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$this->feedName = $json->header->c4TabbedHeaderRenderer->title;
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if ($this->hasCommunityTab($json) === false) {
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returnServerError('Channel does not have a community tab');
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}
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$posts = $this->getCommunityPosts($json);
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foreach ($posts as $key => $post) {
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$this->itemTitle = '';
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if (!isset($post->backstagePostThreadRenderer)) {
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continue;
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}
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if (isset($post->backstagePostThreadRenderer->post->backstagePostRenderer)) {
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$details = $post->backstagePostThreadRenderer->post->backstagePostRenderer;
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} elseif (isset($post->backstagePostThreadRenderer->post->sharedPostRenderer)) {
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// todo: properly extract data from this shared post
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$details = $post->backstagePostThreadRenderer->post->sharedPostRenderer;
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} else {
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continue;
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}
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$item = [];
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$item['uri'] = self::URI . '/post/' . $details->postId;
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$item['author'] = $details->authorText->runs[0]->text ?? null;
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$item['content'] = $item['uri'];
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if (isset($details->contentText->runs)) {
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$text = $this->getText($details->contentText->runs);
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$this->itemTitle = $this->ellipsisTitle($text);
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$item['content'] = $text;
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}
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$item['content'] .= $this->getAttachments($details);
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$item['title'] = $this->itemTitle;
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$date = strtotime(str_replace(' (edited)', '', $details->publishedTimeText->runs[0]->text));
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if (is_int($date)) {
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// subtract an increasing multiple of 60 seconds to always preserve the original order
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$item['timestamp'] = $date - $key * 60;
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}
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$this->items[] = $item;
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}
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}
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public function getURI()
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{
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if (!empty($this->feedUrl)) {
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return $this->feedUrl;
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}
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return parent::getURI();
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}
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public function getName()
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{
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if (!empty($this->feedName)) {
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return $this->feedName . ' - YouTube Community Tab';
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}
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return parent::getName();
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}
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/**
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* Build Community URI
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*/
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private function buildCommunityUri($value, $type)
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{
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return self::URI . '/' . $type . '/' . $value . '/community';
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}
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/**
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* Extract JSON from page
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*/
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private function extractJson($html)
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{
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if (!preg_match($this->jsonRegex, $html, $parts)) {
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returnServerError('Failed to extract data from page');
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}
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$data = json_decode($parts[1]);
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if ($data === false) {
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returnServerError('Failed to decode extracted data');
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}
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return $data;
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}
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/**
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* Check if channel has a community tab
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*/
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private function hasCommunityTab($json)
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{
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foreach ($json->contents->twoColumnBrowseResultsRenderer->tabs as $tab) {
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if (
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isset($tab->tabRenderer)
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&& str_ends_with($tab->tabRenderer->endpoint->commandMetadata->webCommandMetadata->url, 'community')
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) {
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return true;
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}
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}
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return false;
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}
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/**
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* Get community tab posts
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*/
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private function getCommunityPosts($json)
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{
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foreach ($json->contents->twoColumnBrowseResultsRenderer->tabs as $tab) {
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if (
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isset($tab->tabRenderer)
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&& str_ends_with($tab->tabRenderer->endpoint->commandMetadata->webCommandMetadata->url, 'community')
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) {
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return $tab->tabRenderer->content->sectionListRenderer->contents[0]->itemSectionRenderer->contents;
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}
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}
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}
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/**
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* Get text content for a post
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*/
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private function getText($runs)
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{
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$text = '';
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foreach ($runs as $part) {
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if (isset($part->navigationEndpoint->browseEndpoint->canonicalBaseUrl)) {
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$text .= $this->formatUrls($part->text, $part->navigationEndpoint->browseEndpoint->canonicalBaseUrl);
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} elseif (isset($part->navigationEndpoint->urlEndpoint->url)) {
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$text .= $this->formatUrls($part->text, $part->navigationEndpoint->urlEndpoint->url);
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} elseif (isset($part->navigationEndpoint->commandMetadata->webCommandMetadata->url)) {
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$text .= $this->formatUrls($part->text, $part->navigationEndpoint->commandMetadata->webCommandMetadata->url);
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} else {
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$text .= $this->formatUrls($part->text, null);
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}
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}
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return nl2br($text);
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}
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/**
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* Get attachments for posts
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*/
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private function getAttachments($details)
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{
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$content = '';
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if (isset($details->backstageAttachment)) {
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$attachments = $details->backstageAttachment;
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if (isset($attachments->videoRenderer) && isset($attachments->videoRenderer->videoId)) {
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// Video
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if (empty($this->itemTitle)) {
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$this->itemTitle = $this->feedName . ' posted a video';
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}
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$content = <<<EOD
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<iframe width="100%" height="410" src="https://www.youtube.com/embed/{$attachments->videoRenderer->videoId}"
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frameborder="0" allow="encrypted-media;" allowfullscreen></iframe>
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EOD;
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} elseif (isset($attachments->backstageImageRenderer)) {
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// Image
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if (empty($this->itemTitle)) {
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$this->itemTitle = $this->feedName . ' posted an image';
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}
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$lastThumb = end($attachments->backstageImageRenderer->image->thumbnails);
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$content = <<<EOD
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<p><img src="{$lastThumb->url}"></p>
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EOD;
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} elseif (isset($attachments->pollRenderer)) {
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// Poll
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if (empty($this->itemTitle)) {
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$this->itemTitle = $this->feedName . ' posted a poll';
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}
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$pollChoices = '';
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foreach ($attachments->pollRenderer->choices as $choice) {
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$pollChoices .= <<<EOD
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<li>{$choice->text->runs[0]->text}</li>
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EOD;
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}
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$content = <<<EOD
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<hr><p>Poll ({$attachments->pollRenderer->totalVotes->simpleText})<br><ul>{$pollChoices}</ul><p>
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EOD;
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} elseif (isset($attachments->postMultiImageRenderer->images)) {
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// Multiple images
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$images = $attachments->postMultiImageRenderer->images;
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if (is_array($images)) {
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if (empty($this->itemTitle)) {
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$this->itemTitle = $this->feedName . ' posted ' . count($images) . ' images';
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}
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foreach ($images as $image) {
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$lastThumb = end($image->backstageImageRenderer->image->thumbnails);
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$content .= <<<EOD
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<p><img src="{$lastThumb->url}"></p>
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EOD;
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}
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}
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}
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}
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return $content;
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}
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/*
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Ellipsis text for title
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*/
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private function ellipsisTitle($text)
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{
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$length = 100;
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$text = strip_tags($text);
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if (strlen($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 $text;
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}
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private function formatUrls($content, $url)
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{
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if (substr(strval($url), 0, 1) == '/') {
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// fix relative URL
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$url = 'https://www.youtube.com' . $url;
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} elseif (substr(strval($url), 0, 33) == 'https://www.youtube.com/redirect?') {
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// extract actual URL from YouTube redirect
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parse_str(substr($url, 33), $params);
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if (strpos(($params['q'] ?? ''), rtrim($content, '.')) === 0) {
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$url = $params['q'];
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}
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}
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// ensure all URLs are made clickable
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$url = $url ?? $content;
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if (filter_var($url, FILTER_VALIDATE_URL)) {
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return '<a href="' . $url . '" target="_blank">' . $content . '</a>';
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}
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return $content;
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}
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}
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