From abac6e8491b29a50e45630e061075cea70265057 Mon Sep 17 00:00:00 2001
From: DmitriyMX <dimon550@gmail.com>
Date: Sat, 8 May 2021 21:22:49 +0300
Subject: [PATCH] OpenSignEditorPacket

---
 protocol/src/main/java/mc/protocol/State.java |  1 +
 .../packets/server/OpenSignEditorPacket.java  | 31 +++++++++++++++++++
 .../packets/server/SpawnPositionPacket.java   | 14 ++-------
 .../serializer/LocationSerializer.java        | 19 ++++++++++++
 .../main/java/mc/server/PacketHandler.java    |  7 +++++
 5 files changed, 61 insertions(+), 11 deletions(-)
 create mode 100644 protocol/src/main/java/mc/protocol/packets/server/OpenSignEditorPacket.java
 create mode 100644 protocol/src/main/java/mc/protocol/serializer/LocationSerializer.java

diff --git a/protocol/src/main/java/mc/protocol/State.java b/protocol/src/main/java/mc/protocol/State.java
index 70cfb0f..038de6c 100644
--- a/protocol/src/main/java/mc/protocol/State.java
+++ b/protocol/src/main/java/mc/protocol/State.java
@@ -58,6 +58,7 @@ public enum State {
 					PingPacket.class, 0x1F,
 					ChunkDataPacket.class, 0x20,
 					JoinGamePacket.class, 0x23,
+					OpenSignEditorPacket.class, 0x2A,
 					PlayerAbilitiesPacket.class,0x2C,
 					SPlayerPositionAndLookPacket.class, 0x2F,
 					SpawnPositionPacket.class, 0x46
diff --git a/protocol/src/main/java/mc/protocol/packets/server/OpenSignEditorPacket.java b/protocol/src/main/java/mc/protocol/packets/server/OpenSignEditorPacket.java
new file mode 100644
index 0000000..7c06dbc
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/packets/server/OpenSignEditorPacket.java
@@ -0,0 +1,31 @@
+package mc.protocol.packets.server;
+
+import lombok.Data;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.model.Location;
+import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.serializer.LocationSerializer;
+
+/**
+ * Открыть окно редактирования таблички.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD    | TYPE     | NOTES |
+ * |----------|----------|-------|
+ * | Location | Location |       |
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Open_Sign_Editor">Open Sign Editor</a>
+ */
+@Data
+public class OpenSignEditorPacket implements ServerSidePacket {
+
+	private Location location;
+
+	@Override
+	public void writeSelf(NetByteBuf netByteBuf) {
+		long value = LocationSerializer.toLongValue(this.location);
+		netByteBuf.writeLong(value);
+	}
+}
diff --git a/protocol/src/main/java/mc/protocol/packets/server/SpawnPositionPacket.java b/protocol/src/main/java/mc/protocol/packets/server/SpawnPositionPacket.java
index 41a3d10..319336a 100644
--- a/protocol/src/main/java/mc/protocol/packets/server/SpawnPositionPacket.java
+++ b/protocol/src/main/java/mc/protocol/packets/server/SpawnPositionPacket.java
@@ -4,6 +4,7 @@ import lombok.Data;
 import mc.protocol.io.NetByteBuf;
 import mc.protocol.model.Location;
 import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.serializer.LocationSerializer;
 
 /**
  * Спавн позиция игрока.
@@ -14,7 +15,7 @@ import mc.protocol.packets.ServerSidePacket;
  * <pre>
  * | FIELD    | TYPE     | NOTES                 |
  * |----------|----------|-----------------------|
- * | Location | Position | Локация спавна игрока |
+ * | Location | Location | Локация спавна игрока |
  * </pre>
  *
  * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Spawn_Position">Spawn Position</a>
@@ -26,16 +27,7 @@ public class SpawnPositionPacket implements ServerSidePacket {
 
 	@Override
 	public void writeSelf(NetByteBuf netByteBuf) {
-		long spawnSerialized =
-				((long) (floorDouble(spawn.getX()) & 0x3FFFFFF) << 38)
-				| ((long) (floorDouble(spawn.getY()) & 0xFFF) << 26)
-				| (floorDouble(spawn.getZ()) & 0x3FFFFFF);
+		long spawnSerialized = LocationSerializer.toLongValue(this.spawn);
 		netByteBuf.writeLong(spawnSerialized);
 	}
-
-	private static int floorDouble(double value) {
-		int i = (int) value;
-		return value < (double) i ? i - 1 : i;
-	}
-
 }
diff --git a/protocol/src/main/java/mc/protocol/serializer/LocationSerializer.java b/protocol/src/main/java/mc/protocol/serializer/LocationSerializer.java
new file mode 100644
index 0000000..bae859a
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/serializer/LocationSerializer.java
@@ -0,0 +1,19 @@
+package mc.protocol.serializer;
+
+import lombok.experimental.UtilityClass;
+import mc.protocol.model.Location;
+
+@UtilityClass
+public class LocationSerializer {
+
+	public long toLongValue(Location location) {
+		return ((long) (floorDouble(location.getX()) & 0x3FFFFFF) << 38)
+				| ((long) (floorDouble(location.getY()) & 0xFFF) << 26)
+				| (floorDouble(location.getZ()) & 0x3FFFFFF);
+	}
+
+	private static int floorDouble(double value) {
+		int i = (int) value;
+		return value < (double) i ? i - 1 : i;
+	}
+}
diff --git a/server/src/main/java/mc/server/PacketHandler.java b/server/src/main/java/mc/server/PacketHandler.java
index fad97df..6e6c501 100644
--- a/server/src/main/java/mc/server/PacketHandler.java
+++ b/server/src/main/java/mc/server/PacketHandler.java
@@ -122,6 +122,13 @@ public class PacketHandler {
 		context.send(pingPacket);
 
 		context.flushSending();
+
+		// -- Эксперименты -- //
+
+		var openSignEditorPacket = new OpenSignEditorPacket();
+		openSignEditorPacket.setLocation(spawnLocation);
+
+		context.sendNow(openSignEditorPacket);
 	}
 
 	private static String faviconToBase64(Path iconPath) {