add signbook command

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

@@ -0,0 +1,84 @@
+package me.zeroeightsix.kami.command.commands;
+
+import me.zeroeightsix.kami.command.Command;
+import me.zeroeightsix.kami.command.syntax.ChunkBuilder;
+import me.zeroeightsix.kami.command.syntax.SyntaxChunk;
+import me.zeroeightsix.kami.util.Wrapper;
+
+import net.minecraft.item.ItemWritableBook;
+import net.minecraft.item.ItemStack;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.network.play.client.CPacketCustomPayload;
+import net.minecraft.nbt.NBTTagList;
+import net.minecraft.nbt.NBTTagString;
+import net.minecraft.nbt.NBTTagCompound;
+
+import java.util.ArrayList;
+
+import io.netty.buffer.Unpooled;
+
+/**
+ * @author 0x2E | PretendingToCode
+ */
+public class SignBookCommand extends Command {
+
+    public SignBookCommand() {
+        super("signbook", new ChunkBuilder().append("name").build());
+        setDescription("Colored book names. #n for a new line and & for color codes");
+    }
+
+    @Override
+    public void call(String[] args) {
+        ItemStack is = Wrapper.getPlayer().inventory.getCurrentItem();
+        int c = 0x00A7;
+
+        if (args.length == 1) {
+            Command.sendChatMessage("Please specify a title.");
+            return;
+        }
+
+        if (is.getItem() instanceof ItemWritableBook) {
+            ArrayList<String> toAdd = new ArrayList<String>();
+
+            for (int i = 0; i < args.length; i++) {
+                toAdd.add(args[i]);
+            }
+
+            String futureTitle = String.join(" ", toAdd);
+            futureTitle = futureTitle.replaceAll("&", Character.toString((char)c));
+            futureTitle = futureTitle.replaceAll("#n", "\n");
+            futureTitle = futureTitle.replaceAll("null", ""); //Random extra null added sometimes
+
+            if(futureTitle.length() > 31){
+                Command.sendChatMessage("Title cannot be over 31 characters.");
+                return;
+            }
+
+            NBTTagList pages = new NBTTagList();
+            String pageText = "";
+            pages.appendTag(new NBTTagString(pageText));
+
+            NBTTagCompound bookData = is.getTagCompound();
+
+            if(is.hasTagCompound()){
+                if(bookData != null) {
+                    is.setTagCompound(bookData);
+                }
+                is.getTagCompound().setTag("title", new NBTTagString(futureTitle));
+                is.getTagCompound().setTag("author", new NBTTagString(Wrapper.getPlayer().getName()));
+            } else {
+                is.setTagInfo("pages", pages);
+                is.setTagInfo("title", new NBTTagString(futureTitle));
+                is.setTagInfo("author", new NBTTagString(Wrapper.getPlayer().getName()));
+            }
+
+            PacketBuffer buf = new PacketBuffer(Unpooled.buffer());
+            buf.writeItemStack(is);
+
+            Wrapper.getPlayer().connection.sendPacket(new CPacketCustomPayload("MC|BSign", buf));
+            Command.sendChatMessage("Signed book with title: " + futureTitle + "&r");
+        } else {
+            Command.sendChatMessage("You must be holding a writable book.");
+        }
+    }
+}