feat: first proto

src/main/java/rootenginear/playground/mixin/ChunkProviderMixin.java

@@ -0,0 +1,47 @@
+package rootenginear.playground.mixin;
+
+import net.minecraft.core.world.chunk.Chunk;
+import net.minecraft.server.world.WorldServer;
+import net.minecraft.server.world.chunk.provider.ChunkProviderServer;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import rootenginear.playground.mixin.accessor.ChunkProviderServerInvoker;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+@Mixin(value = ChunkProviderServer.class, remap = false)
+public abstract class ChunkProviderMixin {
+	@Shadow
+	@Final
+	private WorldServer world;
+
+	@Redirect(method = "prepareChunk", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/world/chunk/provider/ChunkProviderServer;loadChunkFromFile(II)Lnet/minecraft/core/world/chunk/Chunk;"))
+	private Chunk readTopOpaqueBlockData(ChunkProviderServer cps, int chunkX, int chunkZ) throws IOException {
+		Chunk chunk = ((ChunkProviderServerInvoker) cps).invokeLoadChunkFromFile(chunkX, chunkZ);
+		if (chunk == null) return null;
+		if (this.world.dimension.id == 0) {
+			try (FileOutputStream chunkData = new FileOutputStream(String.format("livemap/chunks/%d.%d.txt", chunkX, chunkZ))) {
+				for (int shiftZ = 0; shiftZ < 16; shiftZ++) {
+					for (int shiftX = 0; shiftX < 16; shiftX++) {
+						short blockData = 0;
+						for (int y = chunk.getHeightValue(shiftX, shiftZ); y > -1; y--) {
+							int blockId = chunk.getBlockID(shiftX, y, shiftZ);
+							if (blockId != 0) {
+								int metadata = chunk.getBlockMetadata(shiftX, y, shiftZ);
+								blockData = (short) ((blockId & 0x3FF) | ((metadata & 0xF) << 10));
+								break;
+							}
+						}
+						chunkData.write(blockData & 0xFF);
+						chunkData.write((blockData >> 8) & 0xFF);
+					}
+				}
+			}
+		}
+		return chunk;
+	}
+}

src/main/java/rootenginear/playground/mixin/NetServerHandlerMixin.java

@@ -0,0 +1,28 @@
+package rootenginear.playground.mixin;
+
+import net.minecraft.core.net.packet.Packet10Flying;
+import net.minecraft.server.entity.player.EntityPlayerMP;
+import net.minecraft.server.net.handler.NetServerHandler;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.io.FileWriter;
+import java.io.IOException;
+
+@Mixin(value = NetServerHandler.class, remap = false)
+public class NetServerHandlerMixin {
+	@Shadow
+	private EntityPlayerMP playerEntity;
+
+	@Inject(method = "handleFlying", at = @At("HEAD"))
+	private void trackLocation(Packet10Flying packet, CallbackInfo ci) throws IOException {
+		if (packet.moving) {
+			try (FileWriter chunkData = new FileWriter(String.format("livemap/players/%s.txt", this.playerEntity.username))) {
+				chunkData.write(String.format("%f %f", this.playerEntity.x, this.playerEntity.z));
+			}
+		}
+	}
+}

src/main/java/rootenginear/playground/mixin/accessor/ChunkProviderServerInvoker.java

@@ -0,0 +1,12 @@
+package rootenginear.playground.mixin.accessor;
+
+import net.minecraft.core.world.chunk.Chunk;
+import net.minecraft.server.world.chunk.provider.ChunkProviderServer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(value = ChunkProviderServer.class, remap = false)
+public interface ChunkProviderServerInvoker {
+	@Invoker("loadChunkFromFile")
+	Chunk invokeLoadChunkFromFile(int chunkX, int chunkZ);
+}

src/main/resources/playground.mixins.json

@@ -1,11 +1,14 @@
 {
-    "required": true,
-    "minVersion": "0.8",
-    "package": "rootenginear.playground.mixin",
-    "compatibilityLevel": "JAVA_8",
-    "mixins": [
-    ],
-    "injectors": {
-        "defaultRequire": 1
+  "required": true,
+  "minVersion": "0.8",
+  "package": "rootenginear.playground.mixin",
+  "compatibilityLevel": "JAVA_8",
+  "mixins": [
+    "ChunkProviderMixin",
+    "NetServerHandlerMixin",
+    "accessor.ChunkProviderServerInvoker"
+  ],
+  "injectors": {
+    "defaultRequire": 1
   }
 }