ScoreboardObjectivePacket

protocol/src/main/java/mc/protocol/State.java

@@ -57,6 +57,7 @@ public enum State {
 					PingPacket.class, 0x1F,
 					JoinGamePacket.class, 0x23,
 					ScoreboardDisplayPacket.class, 0x3B,
+					ScoreboardObjectivePacket.class, 0x42,
 					TeamsPacket.class, 0x44,
 					SpawnPositionPacket.class, 0x46,
 					ChunkDataPacket.class, 0x20,

protocol/src/main/java/mc/protocol/packets/server/ScoreboardObjectivePacket.java

@@ -0,0 +1,44 @@
+package mc.protocol.packets.server;
+
+import lombok.Data;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.utils.ScoreboardObjectiveMode;
+import mc.protocol.utils.ScoreboardObjectiveType;
+
+/**
+ * Scoreboard objective packet.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD           | TYPE        | NOTES                                             |
+ * |-----------------|-------------|---------------------------------------------------|
+ * | Objective Name  | String (16) | Уникальное наименование цели (objective)          |
+ * | Mode            | Byte        | 0 - создание Scoreboard                           |
+ * |                 |             | 1 - удаление Scoreboard                           |
+ * |                 |             | 2 - обновление Scoreboard                         |
+ * | Objective Value | String (32) | Если "Mode" равен 0 или 2. Отображаемый текст     |
+ * | Type            | String (16) | Если "Mode" равен 0 или 2. "integer" или "hearts" |
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Scoreboard_Objective" target="_top">Scoreboard Objective</a>
+ */
+@Data
+public class ScoreboardObjectivePacket implements ServerSidePacket {
+
+	private String name;
+	private ScoreboardObjectiveMode mode;
+	private String value;
+	private ScoreboardObjectiveType type;
+
+	@Override
+	public void writeSelf(NetByteBuf netByteBuf) {
+		netByteBuf.writeString(this.name);
+		netByteBuf.writeByte(this.mode.getCode());
+
+		if (ScoreboardObjectiveMode.CREATE.equals(this.mode) || ScoreboardObjectiveMode.UPDATE.equals(this.mode)) {
+			netByteBuf.writeString(this.value);
+			netByteBuf.writeString(this.type.name().toLowerCase());
+		}
+	}
+}

protocol/src/main/java/mc/protocol/utils/ScoreboardObjectiveMode.java

@@ -0,0 +1,14 @@
+package mc.protocol.utils;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public enum ScoreboardObjectiveMode {
+	CREATE(0),
+	REMOVE(1),
+	UPDATE(2);
+
+	@Getter
+	private final int code;
+}

protocol/src/main/java/mc/protocol/utils/ScoreboardObjectiveType.java

@@ -0,0 +1,6 @@
+package mc.protocol.utils;
+
+public enum ScoreboardObjectiveType {
+	INTEGER,
+	HEARTS
+}

server/src/main/java/mc/server/PacketHandler.java

@@ -127,23 +127,41 @@ public class PacketHandler {
 
 		// --- Эксперименты --- //
 
-		TeamsPacket teamsPacket = new TeamsPacket();
+		var scoreboardObjectivePacket = new ScoreboardObjectivePacket();
-		teamsPacket.setName("Score::List");
+		scoreboardObjectivePacket.setName(playerName);
-		teamsPacket.setMode(TeamsMode.CREATE);
+		scoreboardObjectivePacket.setMode(ScoreboardObjectiveMode.CREATE);
-		teamsPacket.setDisplayName(teamsPacket.getName());
+		scoreboardObjectivePacket.setValue("Score::List");
-		teamsPacket.setNameTagVisibility(TeamsNameTagVisibility.NEVER);
+		scoreboardObjectivePacket.setType(ScoreboardObjectiveType.INTEGER);
-		teamsPacket.setCollisionRule(TeamsCollisionRule.NEVER);
-		teamsPacket.setColor(-1/*no color*/);
-		teamsPacket.getMembers().add(playerName);
 
-		context.send(teamsPacket);
+		context.send(scoreboardObjectivePacket);
 
-		ScoreboardDisplayPacket scoreboardDisplayPacket = new ScoreboardDisplayPacket();
+		var scoreboardDisplayPacket = new ScoreboardDisplayPacket();
 		scoreboardDisplayPacket.setPosition(ScoreboardPosition.LIST);
-		scoreboardDisplayPacket.setName(teamsPacket.getName());
+		scoreboardDisplayPacket.setName(playerName);
 
 		context.send(scoreboardDisplayPacket);
 
+		@SuppressWarnings("java:S117")
+		var teamsPacket_Create = new TeamsPacket();
+		teamsPacket_Create.setMode(TeamsMode.CREATE);
+		teamsPacket_Create.setName("__fakeScore0");
+		teamsPacket_Create.setDisplayName(teamsPacket_Create.getName());
+		teamsPacket_Create.setPrefix("");
+		teamsPacket_Create.setSuffix("");
+		teamsPacket_Create.setNameTagVisibility(TeamsNameTagVisibility.ALWAYS);
+		teamsPacket_Create.setCollisionRule(TeamsCollisionRule.ALWAYS);
+		teamsPacket_Create.setColor(-1/*no color*/);
+
+		context.send(teamsPacket_Create);
+
+		@SuppressWarnings("java:S117")
+		var teamsPacket_Add = new TeamsPacket();
+		teamsPacket_Add.setMode(TeamsMode.ADD_MEMBER);
+		teamsPacket_Add.setName(teamsPacket_Create.getName());
+		teamsPacket_Add.getMembers().add(playerName);
+
+		context.send(teamsPacket_Add);
+
 		context.flushSending();
 	}