<?php
class TwitterBridge extends BridgeAbstract
{
const NAME = 'Twitter Bridge';
const URI = 'https://twitter.com/';
const API_URI = 'https://api.twitter.com';
const GUEST_TOKEN_USES = 100;
const GUEST_TOKEN_EXPIRY = 10800; // 3hrs
const CACHE_TIMEOUT = 300; // 5min
const DESCRIPTION = 'returns tweets';
const MAINTAINER = 'arnd-s';
const PARAMETERS = [
'global' => [
'nopic' => [
'name' => 'Hide profile pictures',
'type' => 'checkbox',
'title' => 'Activate to hide profile pictures in content'
],
'noimg' => [
'name' => 'Hide images in tweets',
'type' => 'checkbox',
'title' => 'Activate to hide images in tweets'
],
'noimgscaling' => [
'name' => 'Disable image scaling',
'type' => 'checkbox',
'title' => 'Activate to disable image scaling in tweets (keeps original image)'
]
],
'By keyword or hashtag' => [
'q' => [
'name' => 'Keyword or #hashtag',
'required' => true,
'exampleValue' => 'rss-bridge OR rssbridge',
'title' => <<<EOD
* To search for multiple words (must contain all of these words), put a space between them.
Example: `rss-bridge release`.
* To search for multiple words (contains any of these words), put "OR" between them.
Example: `rss-bridge OR rssbridge`.
* To search for an exact phrase (including whitespace), put double-quotes around them.
Example: `"rss-bridge release"`
* If you want to search for anything **but** a specific word, put a hyphen before it.
Example: `rss-bridge -release` (ignores "release")
* Of course, this also works for hashtags.
Example: `#rss-bridge OR #rssbridge`
* And you can combine them in any shape or form you like.
Example: `#rss-bridge OR #rssbridge -release`
EOD
]
],
'By username' => [
'u' => [
'name' => 'username',
'required' => true,
'exampleValue' => 'sebsauvage',
'title' => 'Insert a user name'
],
'norep' => [
'name' => 'Without replies',
'type' => 'checkbox',
'title' => 'Only return initial tweets'
],
'noretweet' => [
'name' => 'Without retweets',
'required' => false,
'type' => 'checkbox',
'title' => 'Hide retweets'
],
'nopinned' => [
'name' => 'Without pinned tweet',
'required' => false,
'type' => 'checkbox',
'title' => 'Hide pinned tweet'
]
],
'By list' => [
'user' => [
'name' => 'User',
'required' => true,
'exampleValue' => 'Scobleizer',
'title' => 'Insert a user name'
],
'list' => [
'name' => 'List',
'required' => true,
'exampleValue' => 'Tech-News',
'title' => 'Insert the list name'
],
'filter' => [
'name' => 'Filter',
'exampleValue' => '#rss-bridge',
'required' => false,
'title' => 'Specify term to search for'
]
],
'By list ID' => [
'listid' => [
'name' => 'List ID',
'exampleValue' => '31748',
'required' => true,
'title' => 'Insert the list id'
],
'filter' => [
'name' => 'Filter',
'exampleValue' => '#rss-bridge',
'required' => false,
'title' => 'Specify term to search for'
]
]
];
private $apiKey = null;
private $guestToken = null;
private $authHeader = [];
public function detectParameters($url)
{
$params = [];
// By keyword or hashtag (search)
$regex = '/^(https?:\/\/)?(www\.)?twitter\.com\/search.*(\?|&)q=([^\/&?\n]+)/';
if (preg_match($regex, $url, $matches) > 0) {
$params['q'] = urldecode($matches[4]);
return $params;
}
// By hashtag
$regex = '/^(https?:\/\/)?(www\.)?twitter\.com\/hashtag\/([^\/?\n]+)/';
if (preg_match($regex, $url, $matches) > 0) {
$params['q'] = urldecode($matches[3]);
return $params;
}
// By list
$regex = '/^(https?:\/\/)?(www\.)?twitter\.com\/([^\/?\n]+)\/lists\/([^\/?\n]+)/';
if (preg_match($regex, $url, $matches) > 0) {
$params['user'] = urldecode($matches[3]);
$params['list'] = urldecode($matches[4]);
return $params;
}
// By username
$regex = '/^(https?:\/\/)?(www\.)?twitter\.com\/([^\/?\n]+)/';
if (preg_match($regex, $url, $matches) > 0) {
$params['u'] = urldecode($matches[3]);
return $params;
}
return null;
}
public function getName()
{
switch ($this->queriedContext) {
case 'By keyword or hashtag':
$specific = 'search ';
$param = 'q';
break;
case 'By username':
$specific = '@';
$param = 'u';
break;
case 'By list':
return $this->getInput('list') . ' - Twitter list by ' . $this->getInput('user');
case 'By list ID':
return 'Twitter List #' . $this->getInput('listid');
default:
return parent::getName();
}
return 'Twitter ' . $specific . $this->getInput($param);
}
public function getURI()
{
switch ($this->queriedContext) {
case 'By keyword or hashtag':
return self::URI
. 'search?q='
. urlencode($this->getInput('q'))
. '&f=tweets';
case 'By username':
return self::URI
. urlencode($this->getInput('u'));
// Always return without replies!
// . ($this->getInput('norep') ? '' : '/with_replies');
case 'By list':
return self::URI
. urlencode($this->getInput('user'))
. '/lists/'
. str_replace(' ', '-', strtolower($this->getInput('list')));
case 'By list ID':
return self::URI
. 'i/lists/'
. urlencode($this->getInput('listid'));
default:
return parent::getURI();
}
}
public function collectData()
{
// $data will contain an array of all found tweets (unfiltered)
$data = null;
// Contains user data (when in by username context)
$user = null;
// Array of all found tweets
$tweets = [];
// Get authentication information
$this->getApiKey();
// Try to get all tweets
switch ($this->queriedContext) {
case 'By username':
$user = $this->makeApiCall('/1.1/users/show.json', ['screen_name' => $this->getInput('u')]);
if (!$user) {
returnServerError('Requested username can\'t be found.');
}
$params = [
'user_id' => $user->id_str,
'tweet_mode' => 'extended'
];
$data = $this->makeApiCall('/1.1/statuses/user_timeline.json', $params);
break;
case 'By keyword or hashtag':
$params = [
'q' => urlencode($this->getInput('q')),
'tweet_mode' => 'extended',
'tweet_search_mode' => 'live',
];
$data = $this->makeApiCall('/1.1/search/tweets.json', $params)->statuses;
break;
case 'By list':
$params = [
'slug' => strtolower($this->getInput('list')),
'owner_screen_name' => strtolower($this->getInput('user')),
'tweet_mode' => 'extended',
];
$data = $this->makeApiCall('/1.1/lists/statuses.json', $params);
break;
case 'By list ID':
$params = [
'list_id' => $this->getInput('listid'),
'tweet_mode' => 'extended',
];
$data = $this->makeApiCall('/1.1/lists/statuses.json', $params);
break;
default:
returnServerError('Invalid query context !');
}
if (!$data) {
switch ($this->queriedContext) {
case 'By keyword or hashtag':
returnServerError('No results for this query.');
// fall-through
case 'By username':
returnServerError('Requested username can\'t be found.');
// fall-through
case 'By list':
returnServerError('Requested username or list can\'t be found');
}
}
// Filter out unwanted tweets
foreach ($data as $tweet) {
// Filter out retweets to remove possible duplicates of original tweet
switch ($this->queriedContext) {
case 'By keyword or hashtag':
if (isset($tweet->retweeted_status) && substr($tweet->full_text, 0, 4) === 'RT @') {
continue 2;
}
break;
}
$tweets[] = $tweet;
}
$hidePictures = $this->getInput('nopic');
$hidePinned = $this->getInput('nopinned');
if ($hidePinned) {
$pinnedTweetId = null;
if ($user && $user->pinned_tweet_ids_str) {
$pinnedTweetId = $user->pinned_tweet_ids_str;
}
}
foreach ($tweets as $tweet) {
// Skip own Retweets...
if (isset($tweet->retweeted_status) && $tweet->retweeted_status->user->id_str === $tweet->user->id_str) {
continue;
}
// Skip pinned tweet
if ($hidePinned && $tweet->id_str === $pinnedTweetId) {
continue;
}
switch ($this->queriedContext) {
case 'By username':
if ($this->getInput('norep') && isset($tweet->in_reply_to_status_id)) {
continue 2;
}
break;
}
$item = [];
$realtweet = $tweet;
if (isset($tweet->retweeted_status)) {
// Tweet is a Retweet, so set author based on original tweet and set realtweet for reference to the right content
$realtweet = $tweet->retweeted_status;
}
$item['username'] = $realtweet->user->screen_name;
$item['fullname'] = $realtweet->user->name;
$item['avatar'] = $realtweet->user->profile_image_url_https;
$item['timestamp'] = $realtweet->created_at;
$item['id'] = $realtweet->id_str;
$item['uri'] = self::URI . $item['username'] . '/status/' . $item['id'];
$item['author'] = (isset($tweet->retweeted_status) ? 'RT: ' : '')
. $item['fullname']
. ' (@'
. $item['username'] . ')';
// Convert plain text URLs into HTML hyperlinks
$fulltext = $realtweet->full_text;
$cleanedTweet = $fulltext;
$foundUrls = false;
if (substr($cleanedTweet, 0, 4) === 'RT @') {
$cleanedTweet = substr($cleanedTweet, 3);
}
if (isset($realtweet->entities->media)) {
foreach ($realtweet->entities->media as $media) {
$cleanedTweet = str_replace(
$media->url,
'<a href="' . $media->expanded_url . '">' . $media->display_url . '</a>',
$cleanedTweet
);
$foundUrls = true;
}
}
if (isset($realtweet->entities->urls)) {
foreach ($realtweet->entities->urls as $url) {
$cleanedTweet = str_replace(
$url->url,
'<a href="' . $url->expanded_url . '">' . $url->display_url . '</a>',
$cleanedTweet
);
$foundUrls = true;
}
}
if ($foundUrls === false) {
// fallback to regex'es
$reg_ex = '/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/';
if (preg_match($reg_ex, $realtweet->full_text, $url)) {
$cleanedTweet = preg_replace(
$reg_ex,
"<a href='{$url[0]}' target='_blank'>{$url[0]}</a> ",
$cleanedTweet
);
}
}
// generate the title
$item['title'] = strip_tags($cleanedTweet);
// Add avatar
$picture_html = '';
if (!$hidePictures) {
$picture_html = <<<EOD
<a href="https://twitter.com/{$item['username']}">
<img
style="align:top; width:75px; border:1px solid black;"
alt="{$item['username']}"
src="{$item['avatar']}"
title="{$item['fullname']}" />
</a>
EOD;
}
// Get images
$media_html = '';
if (isset($realtweet->extended_entities->media) && !$this->getInput('noimg')) {
foreach ($realtweet->extended_entities->media as $media) {
switch ($media->type) {
case 'photo':
$image = $media->media_url_https . '?name=orig';
$display_image = $media->media_url_https;
// add enclosures
$item['enclosures'][] = $image;
$media_html .= <<<EOD
<a href="{$image}">
<img
style="align:top; max-width:558px; border:1px solid black;"
referrerpolicy="no-referrer"
src="{$display_image}" />
</a>
EOD;
break;
case 'video':
case 'animated_gif':
if (isset($media->video_info)) {
$link = $media->expanded_url;
$poster = $media->media_url_https;
$video = null;
$maxBitrate = -1;
foreach ($media->video_info->variants as $variant) {
$bitRate = $variant->bitrate ?? -100;
if ($bitRate > $maxBitrate) {
$maxBitrate = $bitRate;
$video = $variant->url;
}
}
if (!is_null($video)) {
// add enclosures
$item['enclosures'][] = $video;
$item['enclosures'][] = $poster;
$media_html .= <<<EOD
<a href="{$link}">Video</a>
<video
style="align:top; max-width:558px; border:1px solid black;"
referrerpolicy="no-referrer"
src="{$video}" poster="{$poster}" />
EOD;
}
}
break;
default:
Debug::log('Missing support for media type: ' . $media->type);
}
}
}
switch ($this->queriedContext) {
case 'By list':
case 'By list ID':
// Check if filter applies to list (using raw content)
if ($this->getInput('filter')) {
if (stripos($cleanedTweet, $this->getInput('filter')) === false) {
continue 2; // switch + for-loop!
}
}
break;
case 'By username':
if ($this->getInput('noretweet') && strtolower($item['username']) != strtolower($this->getInput('u'))) {
continue 2; // switch + for-loop!
}
break;
default:
}
$item['content'] = <<<EOD
<div style="display: inline-block; vertical-align: top;">
{$picture_html}
</div>
<div style="display: inline-block; vertical-align: top;">
<blockquote>{$cleanedTweet}</blockquote>
</div>
<div style="display: block; vertical-align: top;">
<blockquote>{$media_html}</blockquote>
</div>
EOD;
// put out
$this->items[] = $item;
}
usort($this->items, ['TwitterBridge', 'compareTweetId']);
}
private static function compareTweetId($tweet1, $tweet2)
{
return (intval($tweet1['id']) < intval($tweet2['id']) ? 1 : -1);
}
//The aim of this function is to get an API key and a guest token
//This function takes 2 requests, and therefore is cached
private function getApiKey($forceNew = 0)
{
$cacheFactory = new CacheFactory();
$r_cache = $cacheFactory->create();
$scope = 'TwitterBridge';
$r_cache->setScope($scope);
$r_cache->setKey(['refresh']);
$data = $r_cache->loadData();
$refresh = null;
if ($data === null) {
$refresh = time();
$r_cache->saveData($refresh);
} else {
$refresh = $data;
}
$cacheFactory = new CacheFactory();
$cache = $cacheFactory->create();
$cache->setScope($scope);
$cache->setKey(['api_key']);
$data = $cache->loadData();
$apiKey = null;
if ($forceNew || $data === null || (time() - $refresh) > self::GUEST_TOKEN_EXPIRY) {
$twitterPage = getContents('https://twitter.com');
$jsLink = false;
$jsMainRegexArray = [
'/(https:\/\/abs\.twimg\.com\/responsive-web\/web\/main\.[^\.]+\.js)/m',
'/(https:\/\/abs\.twimg\.com\/responsive-web\/web_legacy\/main\.[^\.]+\.js)/m',
'/(https:\/\/abs\.twimg\.com\/responsive-web\/client-web\/main\.[^\.]+\.js)/m',
'/(https:\/\/abs\.twimg\.com\/responsive-web\/client-web-legacy\/main\.[^\.]+\.js)/m',
];
foreach ($jsMainRegexArray as $jsMainRegex) {
if (preg_match_all($jsMainRegex, $twitterPage, $jsMainMatches, PREG_SET_ORDER, 0)) {
$jsLink = $jsMainMatches[0][0];
break;
}
}
if (!$jsLink) {
returnServerError('Could not locate main.js link');
}
$jsContent = getContents($jsLink);
$apiKeyRegex = '/([a-zA-Z0-9]{59}%[a-zA-Z0-9]{44})/m';
preg_match_all($apiKeyRegex, $jsContent, $apiKeyMatches, PREG_SET_ORDER, 0);
$apiKey = $apiKeyMatches[0][0];
$cache->saveData($apiKey);
} else {
$apiKey = $data;
}
$cacheFac2 = new CacheFactory();
$gt_cache = $cacheFactory->create();
$gt_cache->setScope($scope);
$gt_cache->setKey(['guest_token']);
$guestTokenUses = $gt_cache->loadData();
$guestToken = null;
if (
$forceNew || $guestTokenUses === null || !is_array($guestTokenUses) || count($guestTokenUses) != 2
|| $guestTokenUses[0] <= 0 || (time() - $refresh) > self::GUEST_TOKEN_EXPIRY
) {
$guestToken = $this->getGuestToken($apiKey);
if ($guestToken === null) {
if ($guestTokenUses === null) {
returnServerError('Could not parse guest token');
} else {
$guestToken = $guestTokenUses[1];
}
} else {
$gt_cache->saveData([self::GUEST_TOKEN_USES, $guestToken]);
$r_cache->saveData(time());
}
} else {
$guestTokenUses[0] -= 1;
$gt_cache->saveData($guestTokenUses);
$guestToken = $guestTokenUses[1];
}
$this->apiKey = $apiKey;
$this->guestToken = $guestToken;
$this->authHeaders = [
'authorization: Bearer ' . $apiKey,
'x-guest-token: ' . $guestToken,
];
return [$apiKey, $guestToken];
}
// Get a guest token. This is different to an API key,
// and it seems to change more regularly than the API key.
private function getGuestToken($apiKey)
{
$headers = [
'authorization: Bearer ' . $apiKey,
];
$opts = [
CURLOPT_POST => 1,
];
try {
$pageContent = getContents('https://api.twitter.com/1.1/guest/activate.json', $headers, $opts, true);
$guestToken = json_decode($pageContent['content'])->guest_token;
} catch (Exception $e) {
$guestToken = null;
}
return $guestToken;
}
/**
* Tries to make an API call to twitter.
* @param $api string API entry point
* @param $params array additional URI parmaeters
* @return object json data
*/
private function makeApiCall($api, $params)
{
$uri = self::API_URI . $api . '?' . http_build_query($params);
$retries = 1;
$retry = 0;
do {
$retry = 0;
try {
$result = getContents($uri, $this->authHeaders, [], true);
} catch (HttpException $e) {
switch ($e->getCode()) {
case 401:
// fall-through
case 403:
if ($retries) {
$retries--;
$retry = 1;
$this->getApiKey(1);
continue 2;
}
// fall-through
default:
$code = $e->getCode();
$data = $e->getMessage();
returnServerError(
<<<EOD
Failed to make api call: $api
HTTP Status: $code
Errormessage: $data
EOD
);
break;
}
}
} while ($retry);
$data = json_decode($result['content']);
return $data;
}
}