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<?php
require_once "init.php";

if (empty($_GET['link'])){
    header('Location: index.php');
}

$baselink = htmlspecialchars($_GET['link']);

$urlexists = url_exists( $baselink );
if ($urlexists === true) {
    // Regex - filter URL id is match[5]
    $rx = '/^((?:https?:)?\/\/)?                # Optional protocol
             ((?:www|m)[.])?                    # Optional sub-domain
             ((?:youtube[.]com|
                 youtu[.]be|
                 invidio[.]us|
                 invidiou[.]sh|
                 invidious[.]kabi[.]tk|
                 invidious[.]snopyta[.]org))    # URL supports
             (\/(?:[\w\-]+\?v=|embed\/|v\/)?)   # Parameters (embed, v)
             ([\w\-]+)                          # Video id of 11
             (\S+)?$/mx';
    preg_match($rx, $baselink, $match);

    // Testing if id → 11 characters
    if (strlen($match[5]) == 11) {
        $video_id = $match[5];
    } else {
        header('Location: index.php');
    }
} else {
    header('Location: index.php');
}

$video_string = file_get_contents("https://invidio.us/api/v1/videos/{$video_id}");

$video_info = json_decode($video_string);

$videoTitle = $video_info->title;
$videoAuthor = $video_info->author;
$videoDurationSecs = $video_info->lengthSeconds;
$videoDuration = secToDuration($videoDurationSecs);
$videoChannel = $video_info->author;

// Begin_ViewCount
$extract_video_view = $video_info->viewCount;
$videoViews = bytes($extract_video_view);
// End_ViewCount

// change hqdefault.jpg to default.jpg for downgrading the thumbnail quality
$videoThumbURL = "https://i1.ytimg.com/vi/{$video_id}/hqdefault.jpg";
$librethumb = $video_info->videoThumbnails[0]->url;

// Extract videos from JSON
$streamFormats = $video_info->formatStreams;

// Downloads
$downloads = $video_info->formatStreams;

// Breaking DRM!!!
$url_drm = $streamFormats[0]->url;
@$headers = get_headers($url_drm);
if (preg_match('/^HTTP\/\d\.\d\s+(403)/', $headers[0])){
    // Liberty data
    $breakquality = trim($streamFormats[0]->resolution, 'p');
    $breakurl = "https://invidious.snopyta.org/latest_version?id={$video_id}&itag=18&local=true";
    $breaklink = <<<EOT
    <source data-res="{$breakquality}" src="{$breakurl}" type='{$streamFormats[0]->type}'/>
EOT;
    $downloadFormat = $downloads[0]->container;
    $downloadQuality = $streamFormats[0]->resolution;
    $breakdownload = <<<EOT
<div class="row">
  <div class="col">{$downloadFormat}</div>
  <div class="col">{$downloadQuality}</div>
  <div class="col">
    <a class="boton-descarga" href="{$breakurl}" title="{$videoTitle}.{$downloadFormat}" download="{$videoTitle}.{$downloadFormat}">Descarga Habilitada</a>
  </div>
</div>
EOT;
} else {
    $breaklink = '';
    $breakdownload = '';
}
// End Breaking DRM!!!

// // Captions
// $streamCaptions = $video_info->captions;