Implemented sitting

src/main/java/emu/grasscutter/net/packet/PacketOpcodes.java

@@ -1034,6 +1034,8 @@ public class PacketOpcodes {
     public static final int ShowTemplateReminderNotify = 3164;
     public static final int SignInInfoReq = 2510;
     public static final int SignInInfoRsp = 2515;
+    public static final int SitReq = 354;
+    public static final int SitRsp = 335;
     public static final int SocialDataNotify = 4063;
     public static final int SpringUseReq = 1720;
     public static final int SpringUseRsp = 1727;
@@ -1208,5 +1210,4 @@ public class PacketOpcodes {
     public static final int WorldRoutineChangeNotify = 3548;
     public static final int WorldRoutineTypeCloseNotify = 3513;
     public static final int WorldRoutineTypeRefreshNotify = 3545;
-
 }

src/main/java/emu/grasscutter/server/packet/recv/HandleEvtAvatarSitDownNotify.java

@@ -0,0 +1,21 @@
+package emu.grasscutter.server.packet.recv;
+
+import emu.grasscutter.net.packet.Opcodes;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.EvtAvatarSitDownNotifyOuterClass.EvtAvatarSitDownNotify;
+import emu.grasscutter.net.packet.PacketHandler;
+import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketEvtAvatarSitDownNotify;
+
+@Opcodes(PacketOpcodes.EvtAvatarSitDownNotify)
+public class HandleEvtAvatarSitDownNotify extends PacketHandler {
+
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] payload) throws Exception {
+        EvtAvatarSitDownNotify notify = EvtAvatarSitDownNotify.parseFrom(payload);
+
+        session.send(new PacketEvtAvatarSitDownNotify(notify));
+    }
+
+}
+

src/main/java/emu/grasscutter/server/packet/recv/HandleSitReq.java

@@ -0,0 +1,24 @@
+package emu.grasscutter.server.packet.recv;
+
+import emu.grasscutter.net.packet.Opcodes;
+import emu.grasscutter.net.packet.PacketHandler;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.SitReqOuterClass;
+import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketSitRsp;
+import emu.grasscutter.utils.Position;
+
+@Opcodes(PacketOpcodes.SitReq)
+public class HandleSitReq extends PacketHandler {
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] payload) throws Exception {
+        SitReqOuterClass.SitReq req = SitReqOuterClass.SitReq.parseFrom(payload);
+
+        float x = req.getPosition().getX();
+        float y = req.getPosition().getY();
+        float z = req.getPosition().getZ();
+
+        session.send(new PacketSitRsp(req.getChairId(), new Position(x, y, z), session.getPlayer().getTeamManager().getCurrentAvatarEntity().getId()));
+    }
+
+}

src/main/java/emu/grasscutter/server/packet/send/PacketEvtAvatarSitDownNotify.java

@@ -0,0 +1,20 @@
+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.net.packet.GenshinPacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.EvtAvatarSitDownNotifyOuterClass.EvtAvatarSitDownNotify;
+
+public class PacketEvtAvatarSitDownNotify extends GenshinPacket {
+
+    public PacketEvtAvatarSitDownNotify(EvtAvatarSitDownNotify notify) {
+        super(PacketOpcodes.EvtAvatarSitDownNotify);
+
+        EvtAvatarSitDownNotify proto = EvtAvatarSitDownNotify.newBuilder()
+                .setEntityId(notify.getEntityId())
+                .setPosition(notify.getPosition())
+                .setChairId(notify.getChairId())
+                .build();
+
+        this.setData(proto);
+    }
+}

src/main/java/emu/grasscutter/server/packet/send/PacketSitRsp.java

@@ -0,0 +1,21 @@
+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.net.packet.GenshinPacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.SitRspOuterClass.SitRsp;
+import emu.grasscutter.utils.Position;
+
+public class PacketSitRsp extends GenshinPacket {
+
+    public PacketSitRsp(long chairId, Position pos, int EntityId) {
+        super(PacketOpcodes.SitRsp);
+
+        SitRsp proto = SitRsp.newBuilder()
+                .setEntityId(EntityId)
+                .setPosition(pos.toProto())
+                .setChairId(chairId)
+                .build();
+
+        this.setData(proto);
+    }
+}