PaperMC/Spigot-Server-Patches/0004-MC-Utils.patch

From 7da21dbfe05ab9e7d89f7e1f9a5d1cc422205569 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 28 Mar 2016 20:55:47 -0400
Subject: [PATCH] MC Utils


diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
new file mode 100644
index 0000000..f059bc2
--- /dev/null
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -0,0 +1,185 @@
+package net.minecraft.server;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.util.Waitable;
+import org.spigotmc.AsyncCatcher;
+
+import javax.annotation.Nullable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.function.Supplier;
+import java.util.regex.Pattern;
+
+public final class MCUtil {
+    private static final Pattern REPLACE_QUOTES = Pattern.compile("\"");
+    private static final Executor asyncExecutor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("Paper Async Task Handler Thread - %1$d").build());
+
+    private MCUtil() {}
+
+
+    /**
+     * Builds a chat componenent from a string.
+     * @param str
+     * @return
+     */
+    public static IChatBaseComponent cmpFromMessage(String str) {
+        return IChatBaseComponent.ChatSerializer.a("{\"text\":\"" + REPLACE_QUOTES.matcher(str).replaceAll("\\\"") + "\"}");
+    }
+
+    /**
+     * Ensures the target code is running on the main thread
+     * @param reason
+     * @param run
+     * @param <T>
+     * @return
+     */
+    public static <T> T ensureMain(String reason, Supplier<T> run) {
+        if (AsyncCatcher.enabled && Thread.currentThread() != MinecraftServer.getServer().primaryThread) {
+            new IllegalStateException( "Asynchronous " + reason + "! Blocking thread until it returns ").printStackTrace();
+            Waitable<T> wait = new Waitable<T>() {
+                @Override
+                protected T evaluate() {
+                    return run.get();
+                }
+            };
+            MinecraftServer.getServer().processQueue.add(wait);
+            try {
+                return wait.get();
+            } catch (InterruptedException | ExecutionException e) {
+                e.printStackTrace();
+            }
+            return null;
+        }
+        return run.get();
+    }
+
+    /**
+     * Calculates distance between 2 entities
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distance(Entity e1, Entity e2) {
+        return Math.sqrt(distanceSq(e1, e2));
+    }
+
+
+    /**
+     * Calculates distance between 2 block positions
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distance(BlockPosition e1, BlockPosition e2) {
+        return Math.sqrt(distanceSq(e1, e2));
+    }
+
+    /**
+     * Gets the distance between 2 positions
+     * @param x1
+     * @param y1
+     * @param z1
+     * @param x2
+     * @param y2
+     * @param z2
+     * @return
+     */
+    public static double distance(double x1, double y1, double z1, double x2, double y2, double z2) {
+        return Math.sqrt(distanceSq(x1, y1, z1, x2, y2, z2));
+    }
+
+    /**
+     * Get's the distance squared between 2 entities
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distanceSq(Entity e1, Entity e2) {
+        return distanceSq(e1.locX,e1.locY,e1.locZ, e2.locX,e2.locY,e2.locZ);
+    }
+
+    /**
+     * Gets the distance sqaured between 2 block positions
+     * @param pos1
+     * @param pos2
+     * @return
+     */
+    public static double distanceSq(BlockPosition pos1, BlockPosition pos2) {
+        return distanceSq(pos1.getX(), pos1.getY(), pos1.getZ(), pos2.getX(), pos2.getY(), pos2.getZ());
+    }
+
+    /**
+     * Gets the distance squared between 2 positions
+     * @param x1
+     * @param y1
+     * @param z1
+     * @param x2
+     * @param y2
+     * @param z2
+     * @return
+     */
+    public static double distanceSq(double x1, double y1, double z1, double x2, double y2, double z2) {
+        return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2);
+    }
+
+    /**
+     * Converts a NMS World/BlockPosition to Bukkit Location
+     * @param world
+     * @param pos
+     * @return
+     */
+    public static Location toLocation(World world, BlockPosition pos) {
+        return new Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    /**
+     * Converts an NMS entity's current location to a Bukkit Location
+     * @param entity
+     * @return
+     */
+    public static Location toLocation(Entity entity) {
+        return new Location(entity.getWorld().getWorld(), entity.locX, entity.locY, entity.locZ);
+    }
+
+    public static BlockPosition toBlockPosition(Location loc) {
+        return new BlockPosition(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
+    }
+
+    public static boolean isEdgeOfChunk(BlockPosition pos) {
+        final int modX = pos.getX() & 15;
+        final int modZ = pos.getZ() & 15;
+        return (modX == 0 || modX == 15 || modZ == 0 || modZ == 15);
+    }
+
+    /**
+     * Gets a chunk without changing its boolean for should unload
+     * @param world
+     * @param x
+     * @param z
+     * @return
+     */
+    @Nullable public static Chunk getLoadedChunkWithoutMarkingActive(World world, int x, int z) {
+        return ((ChunkProviderServer) world.chunkProvider).chunks.get(ChunkCoordIntPair.a(x, z));
+    }
+
+    /**
+     * Gets a chunk without changing its boolean for should unload
+     * @param provider
+     * @param x
+     * @param z
+     * @return
+     */
+    @Nullable public static Chunk getLoadedChunkWithoutMarkingActive(IChunkProvider provider, int x, int z) {
+        return ((ChunkProviderServer)provider).chunks.get(ChunkCoordIntPair.a(x, z));
+    }
+
+    /**
+     * Posts a task to be executed asynchronously
+     * @param run
+     */
+    public static void scheduleAsyncTask(Runnable run) {
+        asyncExecutor.execute(run);
+    }
+}
diff --git a/src/main/java/net/minecraft/server/NBTTagCompound.java b/src/main/java/net/minecraft/server/NBTTagCompound.java
index 154a2d5..f8a624e 100644
--- a/src/main/java/net/minecraft/server/NBTTagCompound.java
+++ b/src/main/java/net/minecraft/server/NBTTagCompound.java
@@ -13,7 +13,7 @@ import javax.annotation.Nullable;
 
 public class NBTTagCompound extends NBTBase {
 
-    private final Map<String, NBTBase> map = Maps.newHashMap();
+    public final Map<String, NBTBase> map = Maps.newHashMap(); // Paper
 
     public NBTTagCompound() {}
 
@@ -85,11 +85,13 @@ public class NBTTagCompound extends NBTBase {
         this.map.put(s, new NBTTagLong(i));
     }
 
+    public void setUUID(String prefix, UUID uuid) { a(prefix, uuid); } // Paper // OBFHELPER
     public void a(String s, UUID uuid) {
         this.setLong(s + "Most", uuid.getMostSignificantBits());
         this.setLong(s + "Least", uuid.getLeastSignificantBits());
     }
 
+    public UUID getUUID(String prefix) { return a(prefix); } // Paper // OBFHELPER
     @Nullable
     public UUID a(String s) {
         return new UUID(this.getLong(s + "Most"), this.getLong(s + "Least"));
diff --git a/src/main/java/net/minecraft/server/NBTTagList.java b/src/main/java/net/minecraft/server/NBTTagList.java
index 13b93a4..ffe2353 100644
--- a/src/main/java/net/minecraft/server/NBTTagList.java
+++ b/src/main/java/net/minecraft/server/NBTTagList.java
@@ -12,7 +12,7 @@ import org.apache.logging.log4j.Logger;
 public class NBTTagList extends NBTBase {
 
     private static final Logger b = LogManager.getLogger();
-    private List<NBTBase> list = Lists.newArrayList();
+    public List<NBTBase> list = Lists.newArrayList(); // Paper
     private byte type = 0;
 
     public NBTTagList() {}
-- 
2.8.3