<?
if (!isset($_REQUEST['authkey']) || !isset($_REQUEST['torrent_pass'])) {
	enforce_login();
	$TorrentPass = $LoggedUser['torrent_pass'];
	$DownloadAlt = $LoggedUser['DownloadAlt'];
	$UserID		 = $LoggedUser['ID'];
	$AuthKey	 = $LoggedUser['AuthKey'];
} else {
	$UserInfo = $Cache->get_value('user_'.$_REQUEST['torrent_pass']);
	if (!is_array($UserInfo)) {
		$DB->query("
			SELECT ID, DownloadAlt
			FROM users_main AS m
				INNER JOIN users_info AS i ON i.UserID = m.ID
			WHERE m.torrent_pass = '".db_string($_REQUEST['torrent_pass'])."'
				AND m.Enabled = '1'");
		$UserInfo = $DB->next_record();
		$Cache->cache_value('user_'.$_REQUEST['torrent_pass'], $UserInfo, 3600);
	}
	$UserInfo = array($UserInfo);
	list($UserID, $DownloadAlt) = array_shift($UserInfo);
	if (!$UserID) {
		error(0);
	}
	$TorrentPass = $_REQUEST['torrent_pass'];
	$AuthKey = $_REQUEST['authkey'];
}

$TorrentID = $_REQUEST['id'];


if (!is_number($TorrentID)) {
	error(0);
}

/* uTorrent Remote and various scripts redownload .torrent files periodically.
	To prevent this retardation from blowing bandwidth etc., let's block it
	if the .torrent file has been downloaded four times before */
$ScriptUAs = array('BTWebClient*', 'Python-urllib*', 'python-requests*');
if (Misc::in_array_partial($_SERVER['HTTP_USER_AGENT'], $ScriptUAs)) {
	$DB->query("
		SELECT 1
		FROM users_downloads
		WHERE UserID = $UserID
			AND TorrentID = $TorrentID
		LIMIT 4");
	if ($DB->record_count() === 4) {
		error('You have already downloaded this torrent file four times. If you need to download it again, please do so from your browser.', true);
		die();
	}
}

$Info = $Cache->get_value('torrent_download_'.$TorrentID);
if (!is_array($Info) || !array_key_exists('PlainArtists', $Info) || empty($Info[10])) {
	$DB->query("
		SELECT
			t.Media,
			t.Format,
			t.Encoding,
			IF(t.RemasterYear = 0, tg.Year, t.RemasterYear),
			tg.ID AS GroupID,
			tg.Name,
			tg.WikiImage,
			tg.CategoryID,
			t.Size,
			t.FreeTorrent,
			t.info_hash
		FROM torrents AS t
			INNER JOIN torrents_group AS tg ON tg.ID = t.GroupID
		WHERE t.ID = '".db_string($TorrentID)."'");
	if (!$DB->has_results()) {
		error(404);
	}
	$Info = array($DB->next_record(MYSQLI_NUM, array(4, 5, 6, 10)));
	$Artists = Artists::get_artist($Info[0][4], false);
	$Info['Artists'] = Artists::display_artists($Artists, false, true);
	$Info['PlainArtists'] = Artists::display_artists($Artists, false, true, false);
	$Cache->cache_value("torrent_download_$TorrentID", $Info, 0);
}
if (!is_array($Info[0])) {
	error(404);
}
list($Media, $Format, $Encoding, $Year, $GroupID, $Name, $Image, $CategoryID, $Size, $FreeTorrent, $InfoHash) = array_shift($Info); // used for generating the filename
$Artists = $Info['Artists'];

// If he's trying use a token on this, we need to make sure he has one,
// deduct it, add this to the FLs table, and update his cache key.
if ($_REQUEST['usetoken'] && $FreeTorrent == '0') {
	if (isset($LoggedUser)) {
		$FLTokens = $LoggedUser['FLTokens'];
		if ($LoggedUser['CanLeech'] != '1') {
			error('You cannot use tokens while leech disabled.');
		}
	}
	else {
		$UInfo = Users::user_heavy_info($UserID);
		if ($UInfo['CanLeech'] != '1') {
			error('You may not use tokens while leech disabled.');
		}
		$FLTokens = $UInfo['FLTokens'];
	}

	// First make sure this isn't already FL, and if it is, do nothing

	if (!Torrents::has_token($TorrentID)) {
		if ($FLTokens <= 0) {
			error('You do not have any freeleech tokens left. Please use the regular DL link.');
		}
		if ($Size >= 1073741824) {
			error('This torrent is too large. Please use the regular DL link.');
		}

		// Let the tracker know about this
		if (!Tracker::update_tracker('add_token', array('info_hash' => rawurlencode($InfoHash), 'userid' => $UserID))) {
			error('Sorry! An error occurred while trying to register your token. Most often, this is due to the tracker being down or under heavy load. Please try again later.');
		}

		if (!Torrents::has_token($TorrentID)) {
			$DB->query("
				INSERT INTO users_freeleeches (UserID, TorrentID, Time)
				VALUES ($UserID, $TorrentID, NOW())
				ON DUPLICATE KEY UPDATE
					Time = VALUES(Time),
					Expired = FALSE,
					Uses = Uses + 1");
			$DB->query("
				UPDATE users_main
				SET FLTokens = FLTokens - 1
				WHERE ID = $UserID");

			// Fix for downloadthemall messing with the cached token count
			$UInfo = Users::user_heavy_info($UserID);
			$FLTokens = $UInfo['FLTokens'];

			$Cache->begin_transaction("user_info_heavy_$UserID");
			$Cache->update_row(false, array('FLTokens' => ($FLTokens - 1)));
			$Cache->commit_transaction(0);

			$Cache->delete_value("users_tokens_$UserID");
		}
	}
}

//Stupid Recent Snatches On User Page
if ($CategoryID == '1' && $Image != '') {
	$RecentSnatches = $Cache->get_value("recent_snatches_$UserID");
	if (!empty($RecentSnatches)) {
		$Snatch = array(
				'ID' => $GroupID,
				'Name' => $Name,
				'Artist' => $Artists,
				'WikiImage' => $Image);
		if (!in_array($Snatch, $RecentSnatches)) {
			if (count($RecentSnatches) === 5) {
				array_pop($RecentSnatches);
			}
			array_unshift($RecentSnatches, $Snatch);
		} elseif (!is_array($RecentSnatches)) {
			$RecentSnatches = array($Snatch);
		}
		$Cache->cache_value("recent_snatches_$UserID", $RecentSnatches, 0);
	}
}

$DB->query("
	INSERT IGNORE INTO users_downloads (UserID, TorrentID, Time)
	VALUES ('$UserID', '$TorrentID', '".sqltime()."')");

$DB->query("
	SELECT File
	FROM torrents_files
	WHERE TorrentID = '$TorrentID'");

list($Contents) = $DB->next_record(MYSQLI_NUM, false);
$FileName = TorrentsDL::construct_file_name($Info['PlainArtists'], $Name, $Year, $Media, $Format, $Encoding, false, $DownloadAlt);

if ($DownloadAlt) {
	header('Content-Type: text/plain; charset=utf-8');
} elseif (!$DownloadAlt || $Failed) {
	header('Content-Type: application/x-bittorrent; charset=utf-8');
}
header('Content-disposition: attachment; filename="'.$FileName.'"');

echo TorrentsDL::get_file($Contents, ANNOUNCE_URL."/$TorrentPass/announce");

define('SKIP_NO_CACHE_HEADERS', 1);