Add 15w31b client support

Author: lowercasebtw

README.md

@@ -1,8 +1,16 @@
 # ViaSnapshot
+
 ### ⚠️ WARNING: This is experimental and is not safe to use on public servers. Use at your own risk!
-**Allows you to join servers from snapshots, using ViaProxy. Currently only supports 15w31a.**
+
+**Allows you to join servers from snapshots, using ViaProxy.**
+
+Supported Versions:
+
+- 15w31a
+- 15w31b
 
 Known Issues:
+
 - Item Drops are stone
 - Entity metadata is missing
 - Item interaction in newer versions is broken
@@ -11,6 +19,7 @@ Known Issues:
 - And more, possibly on purpose as some packets were disabled
 
 ## Installation and Usage
+
 1. Download the latest version from [GitHub Actions](https://github.com/ViaVersionAddons/ViaSnapshot/actions).
 2. Put the jar file into the plugins folder of ViaProxy
 3. Run ViaProxy. You should now be able to connect from a snapshot client to ViaProxy.

src/main/java/btw/lowercase/viasnapshot/SnapshotProtocolVersion.java

@@ -4,10 +4,11 @@
 import com.viaversion.viaversion.protocol.RedirectProtocolVersion;
 
 public class SnapshotProtocolVersion {
-    public static final ProtocolVersion v15w31a = registerSnapshot(49, "15w31a (Client Only)", ProtocolVersion.v1_8);
+    public static final ProtocolVersion v15w31a = registerSnapshot1_8(49, "15w31a (Client Only)");
+    public static final ProtocolVersion v15w31b = registerSnapshot1_8(50, "15w31b (Client Only)");
 
-    private static ProtocolVersion registerSnapshot(final int version, final String name, final ProtocolVersion origin) {
-        final ProtocolVersion protocolVersion = new RedirectProtocolVersion(version, name, origin);
+    private static ProtocolVersion registerSnapshot1_8(final int version, final String name) {
+        final ProtocolVersion protocolVersion = new RedirectProtocolVersion(version, name, ProtocolVersion.v1_8);
         ProtocolVersion.register(protocolVersion);
         return protocolVersion;
     }

src/main/java/btw/lowercase/viasnapshot/ViaSnapshot.java

@@ -1,6 +1,7 @@
 package btw.lowercase.viasnapshot;
 
 import btw.lowercase.viasnapshot.protocol.v15w31ato1_8.Protocol15w31a_To1_8;
+import btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.Protocol15w31b_To15w31a;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.protocol.ProtocolManager;
 import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
@@ -16,13 +17,13 @@ public void onEnable() {
     }
 
     @EventHandler
-    public void onInitializeEvent(ProtocolTranslatorInitEvent event) {
+    private void onInitializeEvent(ProtocolTranslatorInitEvent event) {
         event.registerPlatform(() -> {
             // Adds this to the VV dump
             Via.getManager().getSubPlatforms().add(String.format("git-ViaSnapshot-%s", getVersion()));
-
             final ProtocolManager protocolManager = Via.getManager().getProtocolManager();
             protocolManager.registerProtocol(new Protocol15w31a_To1_8(), SnapshotProtocolVersion.v15w31a, ProtocolVersion.v1_8);
+            protocolManager.registerProtocol(new Protocol15w31b_To15w31a(), SnapshotProtocolVersion.v15w31b, SnapshotProtocolVersion.v15w31a);
             return null;
         });
     }

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31ato1_8/packet/ClientboundPackets15w31a.java

@@ -78,7 +78,7 @@ public enum ClientboundPackets15w31a implements ClientboundPacketType {
     RESOURCE_PACK,
     UPDATE_ENTITY_NBT;
 
-    private ClientboundPackets15w31a() {
+    ClientboundPackets15w31a() {
     }
 
     public int getId() {

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31ato1_8/packet/ServerboundPackets15w31a.java

@@ -31,7 +31,7 @@ public enum ServerboundPackets15w31a implements ServerboundPacketType {
     TELEPORT_TO_ENTITY,
     RESOURCE_PACK;
 
-    private ServerboundPackets15w31a() {
+    ServerboundPackets15w31a() {
     }
 
     public int getId() {

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31bto15w31a/Protocol15w31b_To15w31a.java

@@ -0,0 +1,19 @@
+package btw.lowercase.viasnapshot.protocol.v15w31bto15w31a;
+
+import btw.lowercase.viasnapshot.protocol.v15w31ato1_8.packet.ClientboundPackets15w31a;
+import btw.lowercase.viasnapshot.protocol.v15w31ato1_8.packet.ServerboundPackets15w31a;
+import btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.packet.ClientboundPackets15w31b;
+import btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.packet.ServerboundPackets15w31b;
+import btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.rewriter.PacketRewriter15w31b;
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+
+public class Protocol15w31b_To15w31a extends AbstractProtocol<ClientboundPackets15w31a, ClientboundPackets15w31b, ServerboundPackets15w31a, ServerboundPackets15w31b> {
+    public Protocol15w31b_To15w31a() {
+        super(ClientboundPackets15w31a.class, ClientboundPackets15w31b.class, ServerboundPackets15w31a.class, ServerboundPackets15w31b.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        PacketRewriter15w31b.register(this);
+    }
+}

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31bto15w31a/packet/ClientboundPackets15w31b.java

@@ -0,0 +1,91 @@
+package btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.packet;
+
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+
+public enum ClientboundPackets15w31b implements ClientboundPacketType {
+    KEEP_ALIVE,
+    LOGIN,
+    CHAT,
+    SET_TIME,
+    SET_EQUIPPED_ITEM,
+    SET_DEFAULT_SPAWN_POSITION,
+    SET_HEALTH,
+    RESPAWN,
+    PLAYER_POSITION,
+    SET_CARRIED_ITEM,
+    PLAYER_SLEEP,
+    ANIMATE,
+    ADD_PLAYER,
+    TAKE_ITEM_ENTITY,
+    ADD_ENTITY,
+    ADD_MOB,
+    ADD_PAINTING,
+    ADD_EXPERIENCE_ORB,
+    SET_ENTITY_MOTION,
+    REMOVE_ENTITIES,
+    MOVE_ENTITY,
+    MOVE_ENTITY_POS,
+    MOVE_ENTITY_ROT,
+    MOVE_ENTITY_POS_ROT,
+    TELEPORT_ENTITY,
+    ROTATE_HEAD,
+    ENTITY_EVENT,
+    SET_ENTITY_LINK,
+    SET_ENTITY_DATA,
+    UPDATE_MOB_EFFECT,
+    REMOVE_MOB_EFFECT,
+    SET_EXPERIENCE,
+    UPDATE_ATTRIBUTES,
+    LEVEL_CHUNK,
+    CHUNK_BLOCKS_UPDATE,
+    BLOCK_UPDATE,
+    BLOCK_EVENT,
+    BLOCK_DESTRUCTION,
+    MAP_BULK_CHUNK,
+    EXPLODE,
+    LEVEL_EVENT,
+    CUSTOM_SOUND,
+    LEVEL_PARTICLES,
+    GAME_EVENT,
+    ADD_GLOBAL_ENTITY,
+    OPEN_SCREEN,
+    CONTAINER_CLOSE,
+    CONTAINER_SET_SLOT,
+    CONTAINER_SET_CONTENT,
+    CONTAINER_SET_DATA,
+    CONTAINER_ACK,
+    UPDATE_SIGN,
+    MAP_ITEM_DATA,
+    BLOCK_ENTITY_DATA,
+    OPEN_SIGN_EDITOR,
+    AWARD_STATS,
+    PLAYER_INFO,
+    PLAYER_ABILITIES,
+    COMMAND_SUGGESTIONS,
+    SET_OBJECTIVE,
+    SET_SCORE,
+    SET_DISPLAY_OBJECTIVE,
+    SET_PLAYER_TEAM,
+    CUSTOM_PAYLOAD,
+    DISCONNECT,
+    CHANGE_DIFFICULTY,
+    PLAYER_COMBAT,
+    SET_CAMERA,
+    SET_BORDER,
+    SET_TITLES,
+    SET_COMPRESSION,
+    TAB_LIST,
+    RESOURCE_PACK,
+    BOSS_BAR;
+
+    ClientboundPackets15w31b() {
+    }
+
+    public int getId() {
+        return this.ordinal();
+    }
+
+    public String getName() {
+        return this.name();
+    }
+}

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31bto15w31a/packet/ServerboundPackets15w31b.java

@@ -0,0 +1,44 @@
+package btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.packet;
+
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+
+public enum ServerboundPackets15w31b implements ServerboundPacketType {
+    KEEP_ALIVE,
+    CHAT,
+    INTERACT,
+    MOVE_PLAYER_STATUS_ONLY,
+    MOVE_PLAYER_POS,
+    MOVE_PLAYER_ROT,
+    MOVE_PLAYER_POS_ROT,
+    PLAYER_ACTION,
+    USE_ITEM,
+    USE_ITEM_ON,
+    SET_CARRIED_ITEM,
+    SWING,
+    PLAYER_COMMAND,
+    PLAYER_INPUT,
+    CONTAINER_CLOSE,
+    CONTAINER_CLICK,
+    CONTAINER_ACK,
+    SET_CREATIVE_MODE_SLOT,
+    CONTAINER_BUTTON_CLICK,
+    SIGN_UPDATE,
+    PLAYER_ABILITIES,
+    COMMAND_SUGGESTION,
+    CLIENT_INFORMATION,
+    CLIENT_COMMAND,
+    CUSTOM_PAYLOAD,
+    TELEPORT_TO_ENTITY,
+    RESOURCE_PACK;
+
+    ServerboundPackets15w31b() {
+    }
+
+    public int getId() {
+        return this.ordinal();
+    }
+
+    public String getName() {
+        return this.name();
+    }
+}

src/main/java/btw/lowercase/viasnapshot/protocol/v15w31bto15w31a/rewriter/PacketRewriter15w31b.java

@@ -0,0 +1,58 @@
+package btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.rewriter;
+
+import btw.lowercase.viasnapshot.protocol.v15w31ato1_8.packet.ClientboundPackets15w31a;
+import btw.lowercase.viasnapshot.protocol.v15w31bto15w31a.Protocol15w31b_To15w31a;
+import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.protocols.v1_8to1_9.Protocol1_8To1_9;
+
+// https://wiki.vg/index.php?title=Pre-release_protocol&direction=prev&oldid=6751
+public class PacketRewriter15w31b {
+    public static void register(final Protocol15w31b_To15w31a protocol) {
+        // Player List Item
+        protocol.registerClientbound(ClientboundPackets15w31a.PLAYER_INFO, new PacketHandlers() {
+            public void register() {
+                map(Types.VAR_INT); // Action
+                map(Types.VAR_INT); // Count
+                handler((wrapper) -> {
+                    final int action = wrapper.get(Types.VAR_INT, 0);
+                    final int count = wrapper.get(Types.VAR_INT, 1);
+                    for (int i = 0; i < count; ++i) {
+                        wrapper.passthrough(Types.UUID); // UUID
+                        if (action != 0) {
+                            if (action != 1 && action != 2) {
+                                // Update Display Name
+                                if (action == 3) {
+                                    String displayName = wrapper.read(Types.OPTIONAL_STRING);
+                                    wrapper.write(Types.OPTIONAL_COMPONENT, displayName != null ? Protocol1_8To1_9.STRING_TO_JSON.transform(wrapper, displayName) : null);
+                                }
+                            } else {
+                                // ?
+                                wrapper.passthrough(Types.VAR_INT);
+                            }
+                        } else {
+                            // Add Player
+                            wrapper.passthrough(Types.STRING); // Name
+
+                            final int properties = wrapper.passthrough(Types.VAR_INT); // Number of properties
+                            for (int j = 0; j < properties; ++j) {
+                                wrapper.passthrough(Types.STRING);
+                                wrapper.passthrough(Types.STRING);
+                                wrapper.passthrough(Types.OPTIONAL_STRING);
+                            }
+
+                            wrapper.passthrough(Types.VAR_INT);
+                            wrapper.passthrough(Types.VAR_INT);
+
+                            String displayName = wrapper.read(Types.OPTIONAL_STRING);
+                            wrapper.write(Types.OPTIONAL_COMPONENT, displayName != null ? Protocol1_8To1_9.STRING_TO_JSON.transform(wrapper, displayName) : null);
+                        }
+                    }
+                });
+            }
+        });
+
+
+        protocol.cancelClientbound(ClientboundPackets15w31a.UPDATE_ENTITY_NBT); // TODO: now bossbar
+    }
+}