<?
authorize();

$UserID = $LoggedUser['ID'];
$ConvID = $_POST['convid'];
$ReceiverID = $_POST['receiverid'];
if (!is_number($ConvID) || !is_number($ReceiverID)) {
	error(404);
}
if (!check_perms('users_mod') && !isset($StaffIDs[$ReceiverID])) {
	error(403);
}
$DB->query("
	SELECT ConvID
	FROM pm_conversations_users
	WHERE UserID='$UserID'
		AND InInbox='1'
		AND (ForwardedTo=0 OR ForwardedTo=UserID)
		AND ConvID='$ConvID'");
if ($DB->record_count() == 0) {
	error(403);
}

$DB->query("
	SELECT ConvID
	FROM pm_conversations_users
	WHERE UserID='$ReceiverID'
		AND (ForwardedTo = 0 OR ForwardedTo = UserID)
		AND InInbox='1'
		AND ConvID='$ConvID'");
if ($DB->record_count() == 0) {
	$DB->query("
		INSERT IGNORE INTO pm_conversations_users
			(UserID, ConvID, InInbox, InSentbox, ReceivedDate)
		VALUES ('$ReceiverID', '$ConvID', '1', '0', NOW())
		ON DUPLICATE KEY UPDATE ForwardedTo = 0, UnRead = 1");
	$DB->query("
		UPDATE pm_conversations_users
		SET ForwardedTo='$ReceiverID'
		WHERE ConvID='$ConvID' AND UserID='$UserID'");
	$Cache->delete_value('inbox_new_'.$ReceiverID);
	header('Location: ' . Inbox::get_inbox_link());
} else {
	error("$StaffIDs[$ReceiverID] already has this conversation in their inbox.");
	header('Location: inbox.php?action=viewconv&id='.$ConvID);
}
//View::show_footer();
?>