added dupe book command

src/main/java/me/zeroeightsix/kami/command/commands/DupeBookCommand.java

@@ -0,0 +1,60 @@
+package me.zeroeightsix.kami.command.commands;
+
+import io.netty.buffer.Unpooled;
+import me.zeroeightsix.kami.command.Command;
+import me.zeroeightsix.kami.command.syntax.ChunkBuilder;
+import me.zeroeightsix.kami.util.Wrapper;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.ItemWritableBook;
+import net.minecraft.nbt.NBTTagList;
+import net.minecraft.nbt.NBTTagString;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.network.play.client.CPacketCustomPayload;
+
+import java.util.Random;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+/**
+ * @author 0x2E | PretendingToCode
+ */
+public class DupeBookCommand extends Command {
+
+    public DupeBookCommand() {
+        super("dupebook", new ChunkBuilder().append("name").build());
+        setDescription("Generates books used for chunk savestate dupe.");
+    }
+
+    @Override
+    public void call(String[] args) {
+        ItemStack is = Wrapper.getPlayer().inventory.getCurrentItem();
+
+        if (is.getItem() instanceof ItemWritableBook) {
+            IntStream characterGenerator = new Random().ints(0x80, 0x10ffff - 0x800).map(i -> i < 0xd800 ? i : i + 0x800);
+            NBTTagList pages = new NBTTagList();
+            String joinedPages = characterGenerator.limit(50 * 210).mapToObj(i -> String.valueOf((char) i)).collect(Collectors.joining());
+
+            for (int page = 0; page < 50; page++) {
+                pages.appendTag(new NBTTagString(joinedPages.substring(page * 210, (page + 1) * 210)));
+            }
+
+            if(is.hasTagCompound()){
+                is.getTagCompound().setTag("pages", pages);
+                is.getTagCompound().setTag("title", new NBTTagString(""));
+                is.getTagCompound().setTag("author", new NBTTagString(Wrapper.getPlayer().getName()));
+            } else {
+                is.setTagInfo("pages", pages);
+                is.setTagInfo("title", new NBTTagString(""));
+                is.setTagInfo("author", new NBTTagString(Wrapper.getPlayer().getName()));
+            }
+
+            PacketBuffer buf = new PacketBuffer(Unpooled.buffer());
+            buf.writeItemStack(is);
+
+            Wrapper.getPlayer().connection.sendPacket(new CPacketCustomPayload("MC|BEdit", buf));
+            Command.sendChatMessage("Dupe book generated.");
+        } else {
+            Command.sendChatMessage("You must be holding a writable book.");
+        }
+    }
+}