added encryption

Author: Nxyi

src/main/java/com/nxyi/addon/Utils/NetworkUtils.java

@@ -0,0 +1,41 @@
+package com.nxyi.addon.Utils;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.net.HttpRetryException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+import com.google.gson.JsonObject;
+import org.apache.http.client.HttpResponseException;
+
+public class NetworkUtils {
+    public static String postJson(final String urlString, JsonObject requestBody) throws IOException {
+        URL url = new URL(urlString);
+        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+        connection.setDoInput(true);
+        connection.setDoOutput(true);
+        connection.setRequestMethod("POST");
+        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
+        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), StandardCharsets.UTF_8);
+        writer.write(requestBody.toString());
+        writer.close();
+        if (connection.getResponseCode() == 204)
+            return "";
+        if (connection.getResponseCode() != 200) {
+            throw new HttpRetryException("", 403);
+        }
+        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+        StringBuilder builder = new StringBuilder();
+        String line;
+        while ((line = reader.readLine()) != null) {
+            builder.append(line);
+        }
+        reader.close();
+        connection.disconnect();
+        return builder.toString();
+    }
+}

src/main/java/com/nxyi/addon/modules/Bookchat.java

@@ -20,6 +20,7 @@
 import net.minecraft.util.Hand;
 
 import java.lang.reflect.Array;
+import org.apache.commons.codec.binary.Base64;
 import java.util.*;
 
 public class Bookchat extends Module {
@@ -32,13 +33,21 @@ public Bookchat() {
     private final SettingGroup sgGeneral = this.settings.getDefaultGroup();
     private final Setting<String> person = sgGeneral.add(new StringSetting.Builder().name("Person").description("Person your chatting with").defaultValue("").build());
 
+    private final Setting<Boolean> encryption = sgGeneral.add(new BoolSetting.Builder()
+        .name("encryption")
+        .description("Encrypt the messages in base64.")
+        .defaultValue(false)
+        .build()
+    );
+
     @EventHandler
     private void onchat(SendMessageEvent event){
-        String msg = mc.player.getEntityName() + " : " + event.message;
+        String msg = event.message;
         if (mc.player.getMainHandStack().getItem().equals(Items.WRITABLE_BOOK)){
             event.cancel();
-            info(msg);
-            mc.player.networkHandler.sendPacket(new BookUpdateC2SPacket(mc.player.getInventory().selectedSlot, Collections.singletonList(msg), Optional.empty()));
+            info(mc.player.getEntityName() + " : " + msg);
+            String encrypted = Base64.encodeBase64String(msg.getBytes());
+            mc.player.networkHandler.sendPacket(new BookUpdateC2SPacket(mc.player.getInventory().selectedSlot, Collections.singletonList((encryption.get() ? encrypted : msg)), Optional.empty()));
         }
     }
 
@@ -56,6 +65,7 @@ private void ontick(TickEvent.Pre event){
         PlayerEntity playerEntity = null;
 
         if (person.get().isEmpty()) return;
+        if(mc.world.getPlayers() == null) return;
         for (PlayerEntity p : mc.world.getPlayers()){
             if (p.getEntityName().equalsIgnoreCase(person.get())){
                 playerEntity = p;
@@ -65,16 +75,22 @@ private void ontick(TickEvent.Pre event){
         if (playerEntity == null) return;
 
         if (playerEntity.getMainHandStack().getItem().equals(Items.WRITABLE_BOOK)){
+            if (playerEntity.getMainHandStack().getNbt().get("pages").toString() == null) return;
             String text = playerEntity.getMainHandStack().getNbt().get("pages").toString()
                 .replaceAll("\\]", "")
                 .replaceAll("\\[", "")
                 .replaceAll("\"", "")
                 .replaceAll("," , " ");
 
+            byte[] decodedBytes = Base64.decodeBase64(text);
+            String decodedString = new String(decodedBytes);
+
             if (Objects.equals(lasttext, text)) return;
 
+            boolean isBase64 = Base64.isBase64(text.getBytes());
+
             lasttext = text;
-            info(text);
+            info(playerEntity.getEntityName() + " : " + (isBase64 ? decodedString : text));
         }
     }
 }