From bbeb41dd7eaf8e3754122e0378556119cc04aec6 Mon Sep 17 00:00:00 2001
From: DmitriyMX <dimon550@gmail.com>
Date: Sun, 2 May 2021 17:14:54 +0300
Subject: [PATCH] ClientSettingsPacket

---
 .../src/main/java/mc/protocol/ChatMode.java   | 20 ++++
 .../src/main/java/mc/protocol/MainHand.java   | 18 ++++
 protocol/src/main/java/mc/protocol/State.java |  3 +-
 .../packets/client/ClientSettingsPacket.java  | 94 +++++++++++++++++++
 4 files changed, 134 insertions(+), 1 deletion(-)
 create mode 100644 protocol/src/main/java/mc/protocol/ChatMode.java
 create mode 100644 protocol/src/main/java/mc/protocol/MainHand.java
 create mode 100644 protocol/src/main/java/mc/protocol/packets/client/ClientSettingsPacket.java

diff --git a/protocol/src/main/java/mc/protocol/ChatMode.java b/protocol/src/main/java/mc/protocol/ChatMode.java
new file mode 100644
index 0000000..33c7bcc
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/ChatMode.java
@@ -0,0 +1,20 @@
+package mc.protocol;
+
+import javax.annotation.Nullable;
+
+public enum ChatMode {
+	FULL,
+	COMMANDS_ONLY,
+	HIDDEN;
+
+	@Nullable
+	public static ChatMode valueById(int id) {
+		// а зачем усложнять?
+		//@formatter:off
+		if (id == 1) return FULL;
+		else if (id == 2) return COMMANDS_ONLY;
+		else if (id == 3) return HIDDEN;
+		else return null;
+		//@formatter:on
+	}
+}
diff --git a/protocol/src/main/java/mc/protocol/MainHand.java b/protocol/src/main/java/mc/protocol/MainHand.java
new file mode 100644
index 0000000..15ea441
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/MainHand.java
@@ -0,0 +1,18 @@
+package mc.protocol;
+
+import javax.annotation.Nullable;
+
+public enum MainHand {
+	LEFT,
+	RIGHT;
+
+	@Nullable
+	public static MainHand valueById(int id) {
+		// а зачем усложнять?
+		//@formatter:off
+		if (id == 0) return LEFT;
+		else if (id == 1) return RIGHT;
+		else return null;
+		//@formatter:on
+	}
+}
diff --git a/protocol/src/main/java/mc/protocol/State.java b/protocol/src/main/java/mc/protocol/State.java
index a4227dd..3f7db7b 100644
--- a/protocol/src/main/java/mc/protocol/State.java
+++ b/protocol/src/main/java/mc/protocol/State.java
@@ -6,6 +6,7 @@ import mc.protocol.packets.ClientSidePacket;
 import mc.protocol.packets.Packet;
 import mc.protocol.packets.PingPacket;
 import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.packets.client.ClientSettingsPacket;
 import mc.protocol.packets.client.HandshakePacket;
 import mc.protocol.packets.client.LoginStartPacket;
 import mc.protocol.packets.client.StatusServerRequestPacket;
@@ -48,7 +49,7 @@ public enum State {
 	),
 	PLAY(3,
 			// server bound
-			Map.of(),
+			Map.of(0x04, ClientSettingsPacket.class),
 			// client bound
 			Map.of(JoinGamePacket.class, 0x23)
 	);
diff --git a/protocol/src/main/java/mc/protocol/packets/client/ClientSettingsPacket.java b/protocol/src/main/java/mc/protocol/packets/client/ClientSettingsPacket.java
new file mode 100644
index 0000000..680db2c
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/packets/client/ClientSettingsPacket.java
@@ -0,0 +1,94 @@
+package mc.protocol.packets.client;
+
+import lombok.*;
+import mc.protocol.ChatMode;
+import mc.protocol.MainHand;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.packets.ClientSidePacket;
+
+/**
+ * Client settings packet.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD                | TYPE          | NOTES                                             |
+ * |--------------------  |---------------|---------------------------------------------------|
+ * | Locale               | String (16)   | например en_gb                                    |
+ * | View Distance        | Byte          | Дистанция отрисовки со стороны Клиента, в чанках. |
+ * | Chat Mode            | VarInt        | 0: enabled                                        |
+ * |                      |               | 1: commands only                                  |
+ * |                      |               | 2: hidden                                         |
+ * |                      |               | [1]                                               |
+ * | Chat Colors          | Boolean       | “Colors” multiplayer setting (???)                |
+ * | Displayed Skin Parts | Unsigned Byte | битовая маска отображения скина. См. ниже         |
+ * | Main Hand            | VarInt        | 0: Left                                           |
+ * |                      |               | 1: Right                                          |
+ *
+ * [1] - <a href="https://wiki.vg/index.php?title=Chat&oldid=13165#Processing_chat">Processing chat</a>
+ * </pre>
+ *
+ * <p>Биты "Displayed Skin Parts"</p>
+ * <pre>
+ * Bit 0 (0x01): Плащ (Cape)
+ * Bit 1 (0x02): Рубашка (Jacket)
+ * Bit 2 (0x04): Левый рукав (Left Sleeve)
+ * Bit 3 (0x08): Правый рукав (Right Sleeve)
+ * Bit 4 (0x10): Левая штанина (Left Pants Leg)
+ * Bit 5 (0x20): Правая штанина (Right Pants Leg)
+ * Bit 6 (0x40): Шлем (Hat)
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Client_Settings">Client Settings</a>
+ */
+@NoArgsConstructor
+@Getter
+@EqualsAndHashCode
+@ToString
+public class ClientSettingsPacket implements ClientSidePacket {
+
+	private String locale;
+	private int viewDistance;
+	private ChatMode chatMode;
+	private boolean chatColors;
+	@SuppressWarnings("java:S116")
+	private int $displayedSkinPartsBitMask;
+	private MainHand mainHand;
+
+	@Override
+	public void readSelf(NetByteBuf netByteBuf) {
+		this.locale = netByteBuf.readString(16);
+		this.viewDistance = netByteBuf.readByte();
+		this.chatMode = ChatMode.valueById(netByteBuf.readVarInt());
+		this.chatColors = netByteBuf.readBoolean();
+		this.$displayedSkinPartsBitMask = netByteBuf.readUnsignedByte();
+		this.mainHand = MainHand.valueById(netByteBuf.readVarInt());
+	}
+
+	public boolean isCapeEnabled() {
+		return ($displayedSkinPartsBitMask & 0x01) > 0;
+	}
+
+	public boolean isJacketEnabled() {
+		return ($displayedSkinPartsBitMask & 0x02) > 0;
+	}
+
+	public boolean isLeftSleeveEnabled() {
+		return ($displayedSkinPartsBitMask & 0x04) > 0;
+	}
+
+	public boolean isRightSleeveEnabled() {
+		return ($displayedSkinPartsBitMask & 0x08) > 0;
+	}
+
+	public boolean isLeftPantsEnabled() {
+		return ($displayedSkinPartsBitMask & 0x10) > 0;
+	}
+
+	public boolean isRightPantsEnabled() {
+		return ($displayedSkinPartsBitMask & 0x20) > 0;
+	}
+
+	public boolean isHatEnabled() {
+		return ($displayedSkinPartsBitMask & 0x40) > 0;
+	}
+}