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/*
* Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
* Copyright (C) 2021 cyoung06
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package kr.syeyoung.dungeonsguide.mod.stomp;
import lombok.Getter;
import net.minecraftforge.common.MinecraftForge;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
public class StompClient extends WebSocketClient {
Logger logger = LogManager.getLogger("StompClient");
public StompClient(URI serverUri, final String token) throws InterruptedException {
super(serverUri);
addHeader("Authorization", token);
logger.info("connecting websocket");
if (!connectBlocking()) {
throw new FailedWebSocketConnection("Cant connect to ws");
}
logger.info("connected, stomp handshake");
while(this.stompClientStatus == StompClientStatus.CONNECTING);
logger.info("fully connected");
}
@Getter
private volatile StompClientStatus stompClientStatus = StompClientStatus.CONNECTING;
@Getter
private StompPayload errorPayload;
private ScheduledFuture heartbeat = null;
private static final ScheduledExecutorService ex = Executors.newScheduledThreadPool(1);
@Override
public void onOpen(ServerHandshake handshakedata) {
send(new StompPayload().method(StompHeader.CONNECT)
.header("accept-version","1.2")
.header("heart-beat", "30000,30000")
.header("host",uri.getHost()).getBuilt()
);
}
@Override
public void onMessage(String message) {
try {
StompPayload payload = StompPayload.parse(message);
switch (payload.method()){
case SEND:
case SUBSCRIBE:
case UNSUBSCRIBE:
case BEGIN:
case COMMIT:
case ABORT:
case ACK:
case NACK:
case DISCONNECT:
case STOMP:
break;
case CONNECTED:
stompClientStatus = StompClientStatus.CONNECTED;
String serverHeartbeat = payload.headers().get("heart-beat");
if (serverHeartbeat != null) {
int heartbeatMS = 30;
this.heartbeat = ex.scheduleAtFixedRate(() -> send("\n"), heartbeatMS-1, heartbeatMS-1, TimeUnit.SECONDS);
}
break;
case MESSAGE:
String subscriptionName = payload.headers().get("subscription");
int subscriptionId = Integer.parseInt(subscriptionName);
StompSubscription listener = stompSubscriptionMap.get(subscriptionId);
listener.process(this, payload.payload());
break;
case RECEIPT:
String receiptId = payload.headers().get("receipt-id");
StompPayload payload1 = receiptMap.remove(Integer.parseInt(receiptId));
if (payload1.method() == StompHeader.DISCONNECT) {
stompClientStatus = StompClientStatus.DISCONNECTED;
close();
}
break;
case ERROR:
errorPayload = payload;
stompClientStatus = StompClientStatus.ERROR;
this.close();
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onClose(int code, String reason, boolean remote) {
if (heartbeat != null) heartbeat.cancel(true);
MinecraftForge.EVENT_BUS.post(new StompDiedEvent(code, reason, remote));
}
@Override
public void onError(Exception ex) {
if(ex != null){
ex.printStackTrace();
}
}
private final Map<Integer, StompSubscription> stompSubscriptionMap = new HashMap<>();
private final Map<Integer, StompPayload> receiptMap = new HashMap<>();
private int idIncrement = 0;
private void makeSureStompIsConnected() {
if (stompClientStatus != StompClientStatus.CONNECTED) throw new IllegalStateException("not connected");
}
public void sendfake(StompPayload payload) {
makeSureStompIsConnected();
payload.method(StompHeader.SEND);
if (payload.headers().get("receipt") != null)
receiptMap.put(Integer.parseInt(payload.headers().get("receipt")), payload);
send(payload.getBuilt());
}
public void subscribe(String destination, StompSubscription listener) {
makeSureStompIsConnected();
int id = ++idIncrement;
send(new StompPayload()
.method(StompHeader.SUBSCRIBE)
.header("id", String.valueOf(id))
.destination(destination)
.header("ack", "auto")
.getBuilt()
);
stompSubscriptionMap.put(id, listener);
}
public void disconnect() {
makeSureStompIsConnected();
stompClientStatus =StompClientStatus.DISCONNECTING;
StompPayload stompPayload = new StompPayload().method(StompHeader.DISCONNECT).header("receipt", String.valueOf(++idIncrement));
send(stompPayload.getBuilt());
receiptMap.put(idIncrement, stompPayload);
}
public enum StompClientStatus {
CONNECTING, CONNECTED, ERROR, DISCONNECTING, DISCONNECTED
}
}
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