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246 lines
7.4 KiB
246 lines
7.4 KiB
<?php
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namespace XRay\Formats;
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use DateTime, DateTimeZone;
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use Parse;
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class Twitter {
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public static function parse($url, $tweet_id, $creds, $json=null) {
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$host = parse_url($url, PHP_URL_HOST);
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if($host == 'twtr.io') {
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$tweet_id = self::b60to10($tweet_id);
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}
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if($json) {
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if(is_string($json))
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$tweet = json_decode($json);
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else
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$tweet = $json;
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} else {
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$twitter = new \Twitter($creds['twitter_api_key'], $creds['twitter_api_secret'], $creds['twitter_access_token'], $creds['twitter_access_token_secret']);
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try {
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$tweet = $twitter->request('statuses/show/'.$tweet_id, 'GET', ['tweet_mode'=>'extended']);
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} catch(\TwitterException $e) {
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return [false, false];
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}
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}
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if(!$tweet)
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return [false, false];
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$entry = array(
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'type' => 'entry',
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'url' => $url,
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'author' => [
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'type' => 'card',
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'name' => null,
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'nickname' => null,
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'photo' => null,
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'url' => null
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]
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);
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$refs = [];
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// Only use the "display" segment of the text
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$text = mb_substr($tweet->full_text,
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$tweet->display_text_range[0],
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$tweet->display_text_range[1]-$tweet->display_text_range[0],
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'UTF-8');
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if(property_exists($tweet, 'retweeted_status')) {
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// No content for retweets
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$reposted = $tweet->retweeted_status;
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$repostOf = 'https://twitter.com/' . $reposted->user->screen_name . '/status/' . $reposted->id_str;
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$entry['repost-of'] = $repostOf;
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list($repostedEntry) = self::parse($repostOf, $reposted->id_str, null, $reposted);
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if(isset($repostedEntry['refs'])) {
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foreach($repostedEntry['refs'] as $k=>$v) {
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$refs[$k] = $v;
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}
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}
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$refs[$repostOf] = $repostedEntry['data'];
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} else {
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// Twitter escapes & as & in the text
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$text = html_entity_decode($text);
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$text = self::expandTweetURLs($text, $tweet);
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$entry['content'] = ['text' => $text];
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}
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// Published date
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$published = new DateTime($tweet->created_at);
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if(property_exists($tweet->user, 'utc_offset')) {
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$tz = new DateTimeZone(sprintf('%+d', $tweet->user->utc_offset / 3600));
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$published->setTimeZone($tz);
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}
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$entry['published'] = $published->format('c');
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// Hashtags
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if(property_exists($tweet, 'entities') && property_exists($tweet->entities, 'hashtags')) {
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if(count($tweet->entities->hashtags)) {
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$entry['category'] = [];
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foreach($tweet->entities->hashtags as $hashtag) {
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$entry['category'][] = $hashtag->text;
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}
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}
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}
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// Don't include the RT'd photo or video in the main object.
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// They get included in the reposted object instead.
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if(!property_exists($tweet, 'retweeted_status')) {
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// Photos and Videos
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if(property_exists($tweet, 'extended_entities') && property_exists($tweet->extended_entities, 'media')) {
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foreach($tweet->extended_entities->media as $media) {
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if($media->type == 'photo') {
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if(!array_key_exists('photo', $entry))
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$entry['photo'] = [];
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$entry['photo'][] = $media->media_url_https;
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} elseif($media->type == 'video') {
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if(!array_key_exists('video', $entry))
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$entry['video'] = [];
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// Find the highest bitrate video that is mp4
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$videos = $media->video_info->variants;
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$videos = array_filter($videos, function($v) {
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return property_exists($v, 'bitrate') && $v->content_type == 'video/mp4';
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});
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if(count($videos)) {
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usort($videos, function($a,$b) {
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return $a->bitrate < $b->bitrate;
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});
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$entry['video'][] = $videos[0]->url;
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}
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}
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}
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}
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// Place
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if(property_exists($tweet, 'place') && $tweet->place) {
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$place = $tweet->place;
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if($place->place_type == 'city') {
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$entry['location'] = $place->url;
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$refs[$place->url] = [
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'type' => 'adr',
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'name' => $place->full_name,
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'locality' => $place->name,
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'country-name' => $place->country,
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];
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}
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}
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}
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// Quoted Status
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if(property_exists($tweet, 'quoted_status')) {
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$quoteOf = 'https://twitter.com/' . $tweet->quoted_status->user->screen_name . '/status/' . $tweet->quoted_status_id_str;
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list($quoted) = self::parse($quoteOf, $tweet->quoted_status_id_str, null, $tweet->quoted_status);
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if(isset($quoted['refs'])) {
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foreach($quoted['refs'] as $k=>$v) {
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$refs[$k] = $v;
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}
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}
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$refs[$quoteOf] = $quoted['data'];
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}
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if($author = self::_buildHCardFromTwitterProfile($tweet->user)) {
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$entry['author'] = $author;
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}
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$response = [
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'data' => $entry
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];
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if(count($refs)) {
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$response['refs'] = $refs;
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}
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return [$response, $tweet];
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}
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private static function _buildHCardFromTwitterProfile($profile) {
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if(!$profile) return false;
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$author = [
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'type' => 'card'
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];
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$author['nickname'] = $profile->screen_name;
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$author['location'] = $profile->location;
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$author['bio'] = self::expandTwitterObjectURLs($profile->description, $profile, 'description');
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if($profile->name)
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$author['name'] = $profile->name;
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else
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$author['name'] = $profile->screen_name;
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if($profile->url) {
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if($profile->entities->url->urls[0]->expanded_url)
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$author['url'] = $profile->entities->url->urls[0]->expanded_url;
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else
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$author['url'] = $profile->entities->url->urls[0]->url;
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}
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else {
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$author['url'] = 'https://twitter.com/' . $profile->screen_name;
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}
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$author['photo'] = $profile->profile_image_url_https;
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return $author;
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}
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private static function expandTweetURLs($text, $object) {
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if(property_exists($object, 'entities') && property_exists($object->entities, 'urls')) {
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foreach($object->entities->urls as $url) {
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$text = str_replace($url->url, $url->expanded_url, $text);
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}
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}
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return $text;
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}
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private static function expandTwitterObjectURLs($text, $object, $key) {
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if(property_exists($object, 'entities')
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&& property_exists($object->entities, $key)
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&& property_exists($object->entities->{$key}, 'urls')) {
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foreach($object->entities->{$key}->urls as $url) {
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$text = str_replace($url->url, $url->expanded_url, $text);
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}
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}
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return $text;
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}
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/**
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* Converts base 60 to base 10, with error checking
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* http://tantek.pbworks.com/NewBase60
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* @param string $s
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* @return int
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*/
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function b60to10($s)
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{
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$n = 0;
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for($i = 0; $i < strlen($s); $i++) // iterate from first to last char of $s
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{
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$c = ord($s[$i]); // put current ASCII of char into $c
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if ($c>=48 && $c<=57) { $c=bcsub($c,48); }
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else if ($c>=65 && $c<=72) { $c=bcsub($c,55); }
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else if ($c==73 || $c==108) { $c=1; } // typo capital I, lowercase l to 1
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else if ($c>=74 && $c<=78) { $c=bcsub($c,56); }
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else if ($c==79) { $c=0; } // error correct typo capital O to 0
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else if ($c>=80 && $c<=90) { $c=bcsub($c,57); }
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else if ($c==95) { $c=34; } // underscore
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else if ($c>=97 && $c<=107) { $c=bcsub($c,62); }
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else if ($c>=109 && $c<=122) { $c=bcsub($c,63); }
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else { $c = 0; } // treat all other noise as 0
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$n = bcadd(bcmul(60, $n), $c);
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}
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return $n;
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}
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}
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