<?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' );
}

// servers JSON
$invidio0 = "https://invidio.us/api/v1/videos/{$video_id}";
$invidio1 = "https://invidious.snopyta.org/api/v1/videos/{$video_id}";

$invidio0on = url_exists( $invidio0 );
$invidio1on = url_exists( $invidio1 );

// check servers
if ( $invidio0on === TRUE ) {
    $video_string = file_get_contents( $invidio0 );
} elseif ( $invidio1on === TRUE ) {
    $video_string = file_get_contents( $invidio1 );
} else {
    header( 'Location: index.php' );
}

$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;

///// Beaking DRM!!!
// Check standar video into URL
$url_standar = video_exists( $streamFormats[0]->url );

if ( $url_standar === FALSE ) {
    // nodes
    $node0 = "https://invidio.us/latest_version?id={$video_id}&itag=18&local=true";
    $node1 = "https://invidious.snopyta.org/latest_version?id={$video_id}&itag=18&local=true";

    // explain DRM
    $drmv  = "https://archive.org/download/libreweb/rms-drm.webm";

    $node0on = video_exists( $node0 );
    $node1on = video_exists( $node1 );

    // format video DRM
    $formatdrm = $streamFormats[0]->type;

    // check nodes
    if ( $node0on === TRUE ) {
        $breakurl = $node0;
    } elseif ( $node1on === TRUE ) {
        $breakurl = $node1;
    } else {
        $breakurl = $drmv;
        $formatdrm = 'video/webm';
    }

    // liberty data
    $breakquality = trim( $streamFormats[0]->resolution, 'p' );
    $breaklink = TRUE;
    $downloadFormat = $downloads[0]->container;
    $downloadQuality = $streamFormats[0]->resolution;
    $downloadbreak = TRUE;
} else {
    // clean variables
    $breakurl = NULL;
    $breaklink = NULL;
    $breakquality = NULL;
    $downloadbreak = NULL;
    $downloadFormat = NULL;
    $downloadQuality = NULL;
    $formatdrm = NULL;
}
///// End Beaking DRM!!!

/* ---- ---- Generated URL and embed ---- ---- */
if ( isset( $_SERVER["HTTPS"] ) && $_SERVER["HTTPS"] == "on" ) {
    $pro = 'https';
} else {
    $pro = 'http';
}

$subject =  $pro."://".$_SERVER['SERVER_NAME'].$_SERVER['SCRIPT_NAME'];

// Local URL
$local_url = preg_replace( '/index.php/', '', $subject );

/* ---- ---- Change to Freedom URL ---- ---- */
$url_freedom = "https://invidio.us/watch?v={$video_id}";