package de.thedevstack.conversationsplus.xmpp.filetransfer.http.delete;

import de.thedevstack.conversationsplus.xml.Element;
import de.thedevstack.conversationsplus.xmpp.IqPacketParser;
import de.thedevstack.conversationsplus.xmpp.exceptions.UnexpectedIqPacketTypeException;
import de.thedevstack.conversationsplus.xmpp.exceptions.XmppException;
import de.thedevstack.conversationsplus.xmpp.filetransfer.http.FileTransferHttp;
import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
import de.thedevstack.conversationsplus.xmpp.utils.ErrorIqPacketExceptionHelper;

/**
 * IqPacketParser to parse the response of a remote file delete request.
 * This parser parses a IqPacket according to the specification 'filetransfer for XMPP over http".
 */
public class DeletedPacketParser extends IqPacketParser {
    /**
     * Parses an IqPacket.
     * <pre>
     * <iq from='montague.tld'
     *     id='delete-file_002'
     *     to='romeo@montague.tld/garden'
     *     type='result'>
     *   <deleted xmlns='urn:xmpp:filetransfer:http'/>
     * </iq>
     * </pre>
     * @param packet the packet to parse
     * @return <code>true</code> if the result packet contains a deleted element of namespace <code>urn:xmpp:filetransfer:http</code>
     * @throws XmppException in case of IqPacket type error or {@link UnexpectedIqPacketTypeException} in case of an unexpected IqPacket type.
     */
    public static boolean parseDeleteToken(IqPacket packet) throws XmppException {
        boolean successfullyDeleted = false;
        if (packet.getType() == IqPacket.TYPE.RESULT) {
            Element deletedElement = findRequiredChild(packet, "deleted", FileTransferHttp.NAMESPACE);
            successfullyDeleted = null != deletedElement;
        } else if (packet.getType() == IqPacket.TYPE.ERROR) {
            ErrorIqPacketExceptionHelper.throwIqErrorException(packet);
        } else {
            throw new UnexpectedIqPacketTypeException(packet, packet.getType(), IqPacket.TYPE.RESULT, IqPacket.TYPE.ERROR);
        }

        return successfullyDeleted;
    }
}