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Extract MP4 video URL from PeerTube ActivityPub metadata to enable video embed 

- This MP4 video URL is located in the tags of the streaming URL link element that we don't support yet
This commit is contained in:
Hypolite Petovan 2021-08-05 10:51:42 -04:00
parent 5fe6689037
commit f194d167b0
1 changed files with 74 additions and 31 deletions
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105
src/Protocol/ActivityPub/Receiver.php
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@ -1220,29 +1220,20 @@ class Receiver
}
/**
* Check if the "as:url" element is an array with multiple links
* This is the case with audio and video posts.
* Then the links are added as attachments
* Extracts a potential alternate URL from a list of additional URL elements
*
* @param array $object The raw object
* @param array $object_data The parsed object data for later processing
* @return array the object data
* @param array $urls
* @return string
*/
private static function processAttachmentUrls(array $object, array $object_data) {
// Check if this is some url with multiple links
if (empty($object['as:url'])) {
return $object_data;
}
private static function extractAlternateUrl(array $urls): string
{
$alternateUrl = '';
foreach ($urls as $key => $url) {
// Not a list but a single URL element
if (!is_numeric($key)) {
continue;
}
$urls = $object['as:url'];
$keys = array_keys($urls);
if (!is_numeric(array_pop($keys))) {
return $object_data;
}
$attachments = [];
foreach ($urls as $url) {
if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
continue;
}
@ -1258,7 +1249,42 @@ class Receiver
}
if ($mediatype == 'text/html') {
$object_data['alternate-url'] = $href;
$alternateUrl = $href;
}
}
return $alternateUrl;
}
/**
* Check if the "as:url" element is an array with multiple links
* This is the case with audio and video posts.
* Then the links are added as attachments
*
* @param array $urls The object URL list
* @return array an array of attachments
*/
private static function processAttachmentUrls(array $urls): array
{
$attachments = [];
foreach ($urls as $key => $url) {
// Not a list but a single URL element
if (!is_numeric($key)) {
continue;
}
if (empty($url['@type']) || ($url['@type'] != 'as:Link')) {
continue;
}
$href = JsonLD::fetchElement($url, 'as:href', '@id');
if (empty($href)) {
continue;
}
$mediatype = JsonLD::fetchElement($url, 'as:mediaType');
if (empty($mediatype)) {
continue;
}
$filetype = strtolower(substr($mediatype, 0, strpos($mediatype, '/')));
@ -1267,7 +1293,17 @@ class Receiver
$attachments[$filetype] = ['type' => $mediatype, 'url' => $href, 'height' => null, 'size' => null];
} elseif ($filetype == 'video') {
$height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
// PeerTube audio-only track
if ($height === 0) {
continue;
}
$size = (int)JsonLD::fetchElement($url, 'pt:size', '@value');
// For embedded video we take the smallest available size
if (!empty($attachments[$mediatype]['size']) && ($size > $attachments[$mediatype]['size'])) {
continue;
}
$attachments[$filetype] = ['type' => $mediatype, 'url' => $href, 'height' => $height, 'size' => $size];
} elseif (in_array($mediatype, ['application/x-bittorrent', 'application/x-bittorrent;x-scheme-handler/magnet'])) {
$height = (int)JsonLD::fetchElement($url, 'as:height', '@value');
@ -1278,18 +1314,13 @@ class Receiver
}
$attachments[$mediatype] = ['type' => $mediatype, 'url' => $href, 'height' => $height, 'size' => null];
} elseif ($mediatype == 'application/x-mpegURL') {
// PeerTube exception, actual video link is in the tags of this URL element
$attachments = array_merge($attachments, self::processAttachmentUrls($url['as:tag']));
}
}
foreach ($attachments as $type => $attachment) {
$object_data['attachments'][] = ['type' => $type,
'mediaType' => $attachment['type'],
'height' => $attachment['height'],
'size' => $attachment['size'],
'name' => '',
'url' => $attachment['url']];
}
return $object_data;
return $attachments;
}
/**
@ -1387,7 +1418,19 @@ class Receiver
}
if (in_array($object_data['object_type'], ['as:Audio', 'as:Video'])) {
$object_data = self::processAttachmentUrls($object, $object_data);
$object_data['alternate-url'] = self::extractAlternateUrl($object['as:url'] ?? []) ?: $object_data['alternate-url'];
$attachments = self::processAttachmentUrls($object['as:url'] ?? []);
foreach ($attachments as $type => $attachment) {
$object_data['attachments'][] = [
'type' => $type,
'mediaType' => $attachment['type'],
'height' => $attachment['height'],
'size' => $attachment['size'],
'name' => '',
'url' => $attachment['url']
];
}
}
$receiverdata = self::getReceivers($object, $object_data['actor'], $object_data['tags'], true);