Scissors/patches/server/0019-Add-custom-classes-used-by-Scissors.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Telesphoreo <me@telesphoreo.me>
Date: Sat, 11 Jun 2022 22:56:59 -0500
Subject: [PATCH] Add custom classes used by Scissors


diff --git a/src/main/java/me/totalfreedom/scissors/MathUtility.java b/src/main/java/me/totalfreedom/scissors/MathUtility.java
new file mode 100644
index 0000000000000000000000000000000000000000..754b578b575137a9c48cb20dee965a9388fedb3c
--- /dev/null
+++ b/src/main/java/me/totalfreedom/scissors/MathUtility.java
@@ -0,0 +1,29 @@
+package me.totalfreedom.scissors;
+
+public class MathUtility
+{
+    public static int clampInt(int number, int minimum, int maximum)
+    {
+        return Math.min(Math.max(number, minimum), maximum);
+    }
+
+    public static long clampLong(long number, long minimum, long maximum)
+    {
+        return Math.min(Math.max(number, minimum), maximum);
+    }
+
+    public static double clampDouble(double number, double minimum, double maximum)
+    {
+        return Math.min(Math.max(number, minimum), maximum);
+    }
+
+    public static int safeDoubleToInt(double number)
+    {
+        return (int) clampDouble(number, Integer.MIN_VALUE, Integer.MAX_VALUE);
+    }
+
+    public static int safeLongToInt(long number)
+    {
+        return (int) clampLong(number, Integer.MIN_VALUE, Integer.MAX_VALUE);
+    }
+}
diff --git a/src/main/java/me/totalfreedom/scissors/NbtUtility.java b/src/main/java/me/totalfreedom/scissors/NbtUtility.java
new file mode 100644
index 0000000000000000000000000000000000000000..b3efac47ee700d5a7ff26452d6bcbf2f687a32cf
--- /dev/null
+++ b/src/main/java/me/totalfreedom/scissors/NbtUtility.java
@@ -0,0 +1,75 @@
+package me.totalfreedom.scissors;
+
+import java.nio.charset.StandardCharsets;
+import javax.annotation.Nullable;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.Tag;
+
+public class NbtUtility
+{
+    public static final long MAXIMUM_SIZE = (256 * 1024);
+
+    public static long getTagSize(@Nullable Tag tag, int depth)
+    {
+        if (depth > 512)
+        {
+            return 0;
+        }
+        if (tag == null)
+        {
+            return 0;
+        }
+
+        long size = 0;
+
+        if (tag.getType() == CompoundTag.TYPE)
+        {
+            CompoundTag compoundTag = (CompoundTag) tag;
+            for (String key : compoundTag.getAllKeys())
+            {
+                size += key.getBytes(StandardCharsets.UTF_8).length;
+                size += getTagSize(compoundTag.get(key), depth + 1);
+            }
+        }
+        else if (tag.getType() == ListTag.TYPE)
+        {
+            ListTag listTag = (ListTag) tag;
+            for (Tag tag1 : listTag)
+            {
+                size += getTagSize(tag1, depth + 1);
+            }
+        }
+        else
+        {
+            size += tag.getAsString().getBytes(StandardCharsets.UTF_8).length;
+        }
+
+        return size;
+    }
+
+    public static long getTagSize(@Nullable CompoundTag tag)
+    {
+        return getTagSize(tag, 0);
+    }
+
+    public static boolean isTooLarge(@Nullable CompoundTag tag)
+    {
+        if (tag == null)
+        {
+            return false;
+        }
+        return getTagSize(tag) > MAXIMUM_SIZE;
+    }
+
+    public static class Item
+    {
+        public static CompoundTag removeItemData(CompoundTag tag)
+        {
+            CompoundTag cleaned = new CompoundTag();
+            cleaned.putString("id", tag.getString("id"));
+            cleaned.putByte("Count", tag.getByte("Count"));
+            return cleaned;
+        }
+    }
+}
diff --git a/src/main/java/me/totalfreedom/scissors/PositionUtility.java b/src/main/java/me/totalfreedom/scissors/PositionUtility.java
new file mode 100644
index 0000000000000000000000000000000000000000..c5dcc833d6f2c0daa1d0c2a7ab81430f25e0b2f3
--- /dev/null
+++ b/src/main/java/me/totalfreedom/scissors/PositionUtility.java
@@ -0,0 +1,53 @@
+package me.totalfreedom.scissors;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.border.WorldBorder;
+import net.minecraft.world.phys.Vec3;
+
+public class PositionUtility
+{
+
+    public static Vec3 getValidVec3FromBlockPos(BlockPos blockPos, Entity entity)
+    {
+        final BlockPos validBlockPos = getValidBlockPos(blockPos, entity);
+
+        return new Vec3(validBlockPos.getX(), validBlockPos.getY(), validBlockPos.getZ());
+    }
+
+    public static BlockPos getValidBlockPos(BlockPos blockPos, Entity entity)
+    {
+        final Level level = entity.level();
+
+        try
+        {
+            if (level.isInWorldBounds(blockPos))
+            {
+                return blockPos;
+            }
+            else
+            {
+                final int x = blockPos.getX();
+                final int y = blockPos.getY();
+                final int z = blockPos.getZ();
+
+                final WorldBorder worldBorder = level.getWorldBorder();
+
+                final int maxX = MathUtility.safeDoubleToInt(worldBorder.getMaxX());
+                final int maxY = level.getMaxBuildHeight();
+                final int maxZ = MathUtility.safeDoubleToInt(worldBorder.getMaxZ());
+
+                final int minX = MathUtility.safeDoubleToInt(worldBorder.getMinX());
+                final int minY = level.getMinBuildHeight();
+                final int minZ = MathUtility.safeDoubleToInt(worldBorder.getMinZ());
+
+                return new BlockPos(MathUtility.clampInt(x, minX, maxX), MathUtility.clampInt(y, minY, maxY), MathUtility.clampInt(z, minZ, maxZ));
+            }
+        }
+        catch (Exception e)
+        { // If we throw some sort of exception due to the position being crazy, catch it
+            return new BlockPos(0, 0, 0);
+        }
+    }
+}