cancelable connection event

Author: emyfops

common/src/main/java/com/lambda/mixin/network/ClientConnectionMixin.java

@@ -65,15 +65,15 @@ private void receivingPacketPost(
         EventFlow.post(new PacketEvent.Receive.Post((Packet<ClientPacketListener>) packet));
     }
 
-    @Inject(method = "connect(Ljava/lang/String;ILnet/minecraft/network/listener/PacketListener;Lnet/minecraft/network/packet/c2s/handshake/ConnectionIntent;)V", at = @At("HEAD"))
+    @Inject(method = "connect(Ljava/lang/String;ILnet/minecraft/network/listener/PacketListener;Lnet/minecraft/network/packet/c2s/handshake/ConnectionIntent;)V", at = @At("HEAD"), cancellable = true)
     private void onConnect(
             String address,
             int port,
             PacketListener listener,
             ConnectionIntent intent,
             CallbackInfo ci
     ) {
-        EventFlow.post(new ConnectionEvent.Connect.Pre(address, port, listener, intent));
+        if (EventFlow.post(new ConnectionEvent.Connect.Pre(address, port, listener, intent)).isCanceled()) ci.cancel();
     }
 
     @Inject(method = "disconnect(Lnet/minecraft/text/Text;)V", at = @At("HEAD"))

common/src/main/kotlin/com/lambda/event/events/ConnectionEvent.kt

@@ -1,6 +1,8 @@
 package com.lambda.event.events
 
 import com.lambda.event.Event
+import com.lambda.event.callback.Cancellable
+import com.lambda.event.callback.ICancellable
 import com.mojang.authlib.GameProfile
 import net.minecraft.network.listener.PacketListener
 import net.minecraft.network.packet.c2s.handshake.ConnectionIntent
@@ -29,7 +31,7 @@ sealed class ConnectionEvent : Event {
             val port: Int,
             val listener: PacketListener,
             val intent: ConnectionIntent,
-        ) : ConnectionEvent()
+        ) : ConnectionEvent(), ICancellable by Cancellable()
 
         /**
          * Event representing a handshake during connection.