/**
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jivesoftware.smackx.bytestreams.ibb;

import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smackx.bytestreams.BytestreamRequest;
import org.jivesoftware.smackx.bytestreams.ibb.packet.Open;

/**
 * InBandBytestreamRequest class handles incoming In-Band Bytestream requests.
 *
 * @author Henning Staib
 */
public class InBandBytestreamRequest implements BytestreamRequest {

    /* the bytestream initialization request */
    private final Open byteStreamRequest;

    /*
     * In-Band Bytestream manager containing the XMPP connection and helper
     * methods
     */
    private final InBandBytestreamManager manager;

    protected InBandBytestreamRequest(InBandBytestreamManager manager,
                                      Open byteStreamRequest) {
        this.manager = manager;
        this.byteStreamRequest = byteStreamRequest;
    }

    /**
     * Returns the sender of the In-Band Bytestream open request.
     *
     * @return the sender of the In-Band Bytestream open request
     */
    public String getFrom() {
        return this.byteStreamRequest.getFrom();
    }

    /**
     * Returns the session ID of the In-Band Bytestream open request.
     *
     * @return the session ID of the In-Band Bytestream open request
     */
    public String getSessionID() {
        return this.byteStreamRequest.getSessionID();
    }

    /**
     * Accepts the In-Band Bytestream open request and returns the session to
     * send/receive data.
     *
     * @return the session to send/receive data
     * @throws XMPPException if stream is invalid.
     */
    public InBandBytestreamSession accept() throws XMPPException {
        Connection connection = this.manager.getConnection();

        // create In-Band Bytestream session and store it
        InBandBytestreamSession ibbSession = new InBandBytestreamSession(connection,
                this.byteStreamRequest, this.byteStreamRequest.getFrom());
        this.manager.getSessions().put(this.byteStreamRequest.getSessionID(), ibbSession);

        // acknowledge request
        IQ resultIQ = IQ.createResultIQ(this.byteStreamRequest);
        connection.sendPacket(resultIQ);

        return ibbSession;
    }

    /**
     * Rejects the In-Band Bytestream request by sending a reject error to the
     * initiator.
     */
    public void reject() {
        this.manager.replyRejectPacket(this.byteStreamRequest);
    }

}
