<?
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.php');
} else {
	error("$StaffIDs[$ReceiverID] already has this conversation in their inbox.");
	header('Location: inbox.php?action=viewconv&id='.$ConvID);
}
//View::show_footer();
?>