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- <?php
- namespace p3k\XRay\Formats;
-
- use DateTime;
- use \p3k\XRay\PostType;
-
- class ActivityStreams extends Format {
-
- public static function is_as2_json($document) {
- if(is_array($document) && isset($document['@context'])) {
- if(is_string($document['@context']) && $document['@context'] == 'https://www.w3.org/ns/activitystreams')
- return true;
- if(is_array($document['@context']) && in_array('https://www.w3.org/ns/activitystreams', $document['@context']))
- return true;
- }
-
- return false;
- }
-
- public static function matches_host($url) {
- return true;
- }
-
- public static function matches($url) {
- return true;
- }
-
- public static function parse($http_response, $http, $opts=[]) {
- $as2 = $http_response['body'];
- $url = $http_response['url'];
-
- if(!isset($as2['type']))
- return false;
-
- if($as2['type'] == 'Create' && is_array($as2['object'])) {
- // Extract the object and parse that instead
- $as2 = $as2['object'];
- }
-
- switch($as2['type']) {
- case 'Person':
- return self::parseAsHCard($as2, $url, $http, $opts);
- case 'Article':
- case 'Note':
- case 'Announce': // repost
- case 'Like': // like
- return self::parseAsHEntry($as2, $url, $http, $opts);
- }
-
- $result = [
- 'data' => [
- 'type' => 'unknown',
- ],
- 'url' => $url,
- 'code' => $http_response['code'],
- ];
- return $result;
- }
-
- private static function parseAsHEntry($as2, $url, $http, $opts) {
- $data = [
- 'type' => 'entry'
- ];
- $refs = [];
-
- if(isset($as2['url']))
- $data['url'] = $as2['url'];
- elseif(isset($as2['id']))
- $data['url'] = $as2['id'];
-
- if(isset($as2['published'])) {
- try {
- $date = new DateTime($as2['published']);
- $data['published'] = $date->format('c');
- } catch(\Exception $e){}
- } elseif(isset($as2['signature']['created'])) {
- // Pull date from the signature if there isn't one in the activity
- try {
- $date = new DateTime($as2['signature']['created']);
- $data['published'] = $date->format('c');
- } catch(\Exception $e){}
- }
-
- if(isset($as2['name'])) {
- $data['name'] = $as2['name'];
- }
-
- if(isset($as2['summary'])) {
- $data['summary'] = $as2['summary'];
- }
-
- if(isset($as2['content'])) {
- $html = trim(self::sanitizeHTML($as2['content']));
- $text = trim(self::stripHTML($html));
-
- $data['content'] = [
- 'text' => $text
- ];
-
- if($html && $text && $text != $html) {
- $data['content']['html'] = $html;
- }
- }
-
- if(isset($as2['tag']) && is_array($as2['tag'])) {
- $emoji = [];
- $category = [];
- foreach($as2['tag'] as $tag) {
- if(is_array($tag) && isset($tag['name']) && isset($tag['type']) && $tag['type'] == 'Hashtag')
- $category[] = trim($tag['name'], '#');
- if(is_array($tag) && isset($tag['type']) && $tag['type'] == 'Emoji' && isset($tag['icon']['url'])) {
- $emoji[$tag['name']] = $tag['icon']['url'];
- }
- }
-
- if(count($category))
- $data['category'] = $category;
-
- if(count($emoji) && isset($data['content']['html'])) {
- foreach($emoji as $code=>$img) {
- $data['content']['html'] = str_replace($code, '<img src="'.$img.'" alt="'.$code.'" title="'.$code.'" height="24" class="xray-emoji">', $data['content']['html']);
- }
- }
- }
-
- if(isset($as2['inReplyTo'])) {
- $data['in-reply-to'] = [$as2['inReplyTo']];
- }
-
- // Photos and Videos
- if(isset($as2['attachment'])) {
- $photos = [];
- $videos = [];
- foreach($as2['attachment'] as $attachment) {
- if(strpos($attachment['mediaType'], 'image/') !== false) {
- $photos[] = $attachment['url'];
- }
- if(strpos($attachment['mediaType'], 'video/') !== false) {
- $videos[] = $attachment['url'];
- }
- }
- if(count($photos))
- $data['photo'] = $photos;
- if(count($videos))
- $data['video'] = $videos;
- }
-
- // Fetch the author info, which requires an HTTP request
- $authorURL = false;
- if(isset($as2['attributedTo']) && is_string($as2['attributedTo'])) {
- $authorURL = $as2['attributedTo'];
- } elseif(isset($as2['actor']) && is_string($as2['actor'])) {
- $authorURL = $as2['actor'];
- }
- if($authorURL) {
- $authorResponse = $http->get($authorURL, ['Accept: application/activity+json,application/json']);
- if($authorResponse && !empty($authorResponse['body'])) {
- $authorProfile = json_decode($authorResponse['body'], true);
- $author = self::parseAsHCard($authorProfile, $authorURL, $http, $opts);
- if($author && !empty($author['data']))
- $data['author'] = $author['data'];
- }
- }
-
- // If this is a repost, fetch the reposted content
- if($as2['type'] == 'Announce' && isset($as2['object']) && is_string($as2['object'])) {
- $data['repost-of'] = [$as2['object']];
- $reposted = $http->get($as2['object'], ['Accept: application/activity+json,application/json']);
- if($reposted && !empty($reposted['body'])) {
- $repostedData = json_decode($reposted['body'], true);
- if($repostedData) {
- $reposted['body'] = $repostedData;
- $repost = self::parse($reposted, $http, $opts);
- if($repost && isset($repost['data']) && $repost['data']['type'] != 'unknown') {
- $refs[$as2['object']] = $repost['data'];
- }
- }
- }
- }
-
- // If this is a like, fetch the liked post
- if($as2['type'] == 'Like' && isset($as2['object']) && is_string($as2['object'])) {
- $data['like-of'] = [$as2['object']];
- $liked = $http->get($as2['object'], ['Accept: application/activity+json,application/json']);
- if($liked && !empty($liked['body'])) {
- $likedData = json_decode($liked['body'], true);
- if($likedData) {
- $liked['body'] = $likedData;
- $like = self::parse($liked, $http, $opts);
- if($like && isset($like['data']['type']) && $like['data']['type'] != 'unknown') {
- $refs[$as2['object']] = $like['data'];
- }
- }
- }
- }
-
- $data['post-type'] = PostType::discover($data);
-
- $response = [
- 'data' => $data,
- ];
-
- if(count($refs)) {
- $response['data']['refs'] = $refs;
- }
-
- return $response;
- }
-
- private static function parseAsHCard($as2, $url, $http, $opts) {
- $data = [
- 'type' => 'card',
- 'name' => null,
- 'url' => null,
- 'photo' => null
- ];
-
- if(!empty($as2['name']))
- $data['name'] = $as2['name'];
- elseif(isset($as2['preferredUsername']))
- $data['name'] = $as2['preferredUsername'];
-
- if(isset($as2['preferredUsername']))
- $data['nickname'] = $as2['preferredUsername'];
-
- if(isset($as2['url']))
- $data['url'] = $as2['url'];
-
- if(isset($as2['icon']) && isset($as2['icon']['url']))
- $data['photo'] = $as2['icon']['url'];
-
- // TODO: featured image for h-cards?
- // if(isset($as2['image']) && isset($as2['image']['url']))
- // $data['featured'] = $as2['image']['url'];
-
- $response = [
- 'data' => $data
- ];
-
- return $response;
- }
-
- }
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