How to use

send

method

in

us.myles.ViaVersion.api.PacketWrapper

/**
 * Send this packet to the associated user.
 * Be careful not to send packets twice.
 * (Sends it after current)
 *
 * @param packetProtocol      - The protocol version of the packet.
 * @param skipCurrentPipeline - Skip the current pipeline
 * @throws Exception if it fails to write
 */
public void send(Class<? extends Protocol> packetProtocol, boolean skipCurrentPipeline) throws Exception {
  send(packetProtocol, skipCurrentPipeline, false);
}

/**
 * Send this packet to the associated user.
 * Be careful not to send packets twice.
 * (Sends it after current)
 *
 * @param packetProtocol - The protocol version of the packet.
 * @throws Exception if it fails to write
 */
public void send(Class<? extends Protocol> packetProtocol) throws Exception {
  send(packetProtocol, true);
}

  public static boolean sendPacket(PacketWrapper packet, Class<? extends Protocol> packetProtocol, boolean skipCurrentPipeline, boolean currentThread) {
    try {
      packet.send(packetProtocol, skipCurrentPipeline, currentThread);
      return true;
    } catch (CancelException ignored) {
      ;
    } catch (Exception ex) {
      ex.printStackTrace();
    }
    return false;
  }
}

  public void sendMetadataBuffer(int entityId) {
    if (!this.metadataBuffer.containsKey(entityId)) return;
    if (entityReplacements.containsKey(entityId)) {
      entityReplacements.get(entityId).updateMetadata(this.metadataBuffer.remove(entityId));
    } else {
      PacketWrapper wrapper = new PacketWrapper(0x1C, null, this.getUser());
      wrapper.write(Type.VAR_INT, entityId);
      wrapper.write(Types1_8.METADATA_LIST, this.metadataBuffer.get(entityId));
      MetadataRewriter.transform(this.getClientEntityTypes().get(entityId), this.metadataBuffer.get(entityId));
      if (!this.metadataBuffer.get(entityId).isEmpty()) {
        try {
          wrapper.send(Protocol1_8TO1_9.class);
        } catch (Exception ex) {
          ex.printStackTrace();
        }
      }

      this.metadataBuffer.remove(entityId);
    }
  }
}

private void sendPacket(UUID uuid, PacketWrapper wrapper) {
  if (!Via.getAPI().isPorted(uuid) || !(Via.getAPI().getPlayerVersion(uuid) >= ProtocolVersion.v1_9.getId())) {
    players.remove(uuid);
    return;
  }
  try {
    wrapper.send(Protocol1_9TO1_8.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
}

private void sendBlockChange(UserConnection user, Position position, int blockId) throws Exception {
  PacketWrapper wrapper = new PacketWrapper(0x0B, null, user);
  wrapper.write(Type.POSITION, position);
  wrapper.write(Type.VAR_INT, blockId);
  wrapper.send(Protocol1_13To1_12_2.class, true, true);
}

public void sendMetadataBuffer(int entityID) {
  List<Metadata> metadataList = metadataBuffer.get(entityID);
  if (metadataList != null) {
    PacketWrapper wrapper = new PacketWrapper(0x39, null, getUser());
    wrapper.write(Type.VAR_INT, entityID);
    wrapper.write(Types1_9.METADATA_LIST, metadataList);
    MetadataRewriter.transform(getClientEntityTypes().get(entityID), metadataList);
    handleMetadata(entityID, metadataList);
    if (metadataList.size() > 0) {
      try {
        wrapper.send(Protocol1_9TO1_8.class);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    metadataBuffer.remove(entityID);
  }
}

public void setSecondHand(int entityID, Item item) {
  PacketWrapper wrapper = new PacketWrapper(0x3C, null, getUser());
  wrapper.write(Type.VAR_INT, entityID);
  wrapper.write(Type.VAR_INT, 1); // slot
  wrapper.write(Type.ITEM, item);
  try {
    wrapper.send(Protocol1_9TO1_8.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
}

  private static void updateBlockEntity(Position pos, short id, CompoundTag tag, UserConnection connection) throws Exception {
    PacketWrapper wrapper = new PacketWrapper(0x09, null, connection);
    wrapper.write(Type.POSITION, pos);
    wrapper.write(Type.UNSIGNED_BYTE, id);
    wrapper.write(Type.NBT, tag);
    wrapper.send(Protocol1_9_1_2TO1_9_3_4.class, false);
  }
}

public void update() {
  PacketWrapper wrapper = new PacketWrapper(0x0F, null, getUser());
  wrapper.write(Type.STRING, Protocol1_9TO1_8.fixJson(generateString()));
  wrapper.write(Type.BYTE, (byte) 2);
  try {
    wrapper.send(Protocol1_12To1_11_1.class);
  } catch (Exception e) {
    ViaBackwards.getPlatform().getLogger().severe("Failed to send the shoulder indication");
    e.printStackTrace();
  }
}

  @Override
  public void run() {
    PacketWrapper wrapper = new PacketWrapper(0x2C, null, getUserConnection(p.getUniqueId()));
    try {
      int entityId = getEntityId(p);
      wrapper.write(Type.VAR_INT, 2); // Event - Entity dead
      wrapper.write(Type.VAR_INT, entityId); // Player ID
      wrapper.write(Type.INT, entityId); // Entity ID
      Protocol1_9TO1_8.FIX_JSON.write(wrapper, msg); // Message
      wrapper.send(Protocol1_9TO1_8.class);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
});

  @Override
  public void run() {
    // If online
    if (getUserConnection(p) != null) {
      PacketWrapper wrapper = new PacketWrapper(0x2C, null, getUserConnection(p));
      try {
        wrapper.write(Type.VAR_INT, 2); // Event - Entity dead
        wrapper.write(Type.VAR_INT, p.getEntityId()); // Player ID
        wrapper.write(Type.INT, p.getEntityId()); // Entity ID
        Protocol1_9TO1_8.FIX_JSON.write(wrapper, msg); // Message
        wrapper.send(Protocol1_9TO1_8.class);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
});

public static void update(UserConnection user, Position position) {
  for (int x = -1; x <= 1; x++) {
    for (int z = -1; z <= 1; z++) {
      for (int y = -1; y <= 1; y++) {
        if (Math.abs(x) + Math.abs(y) + Math.abs(z) != 1) continue;
        Position pos = new Position(position.getX() + x, position.getY() + y, position.getZ() + z);
        int blockState = Via.getManager().getProviders().get(BlockConnectionProvider.class).getBlockdata(user, pos);
        if (!connects(blockState)) continue;
        int newBlockState = connect(user, pos, blockState);
        if (newBlockState == blockState) continue;
        PacketWrapper blockUpdatePacket = new PacketWrapper(0x0B, null, user);
        blockUpdatePacket.write(Type.POSITION, pos);
        blockUpdatePacket.write(Type.VAR_INT, newBlockState);
        try {
          blockUpdatePacket.send(Protocol1_13To1_12_2.class, true, false);
        } catch (Exception ex) {
          ex.printStackTrace();
        }
      }
    }
  }
}

public void sendPermission(UserConnection user) throws Exception {
  if (!isEnabled())
    return;
  PacketWrapper wrapper = new PacketWrapper(0x1B, null, user); // Entity status
  wrapper.write(Type.INT, user.get(EntityTracker.class).getProvidedEntityId()); // Entity ID
  wrapper.write(Type.BYTE, (byte) 26); // Hardcoded op permission level
  wrapper.send(Protocol1_9TO1_8.class);
  user.get(CommandBlockStorage.class).setPermissions(true);
}

  @Subscribe(order = PostOrder.LAST)
  public void onServerConnected(ServerConnectedEvent event) {
    UserConnection user = Via.getManager().getConnection(event.getPlayer().getUniqueId());
    if (user == null) return;

    try {
      if (user.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) {
        int entityId = user.get(EntityTracker.class).getProvidedEntityId();

        PacketWrapper wrapper = new PacketWrapper(0x39, null, user);

        wrapper.write(Type.VAR_INT, entityId);
        wrapper.write(Types1_9.METADATA_LIST, Collections.singletonList(new Metadata(0, MetaType1_9.Byte, (byte) 0)));

        wrapper.send(Protocol1_9TO1_8.class);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

  @EventHandler(priority = EventPriority.HIGH)
  public void onServerConnected(ServerConnectedEvent event) {
    UserConnection user = Via.getManager().getConnection(event.getPlayer().getUniqueId());
    if (user == null) return;

    try {
      if (user.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) {
        int entityId = user.get(EntityTracker.class).getProvidedEntityId();

        PacketWrapper wrapper = new PacketWrapper(0x39, null, user);

        wrapper.write(Type.VAR_INT, entityId);
        wrapper.write(Types1_9.METADATA_LIST, Collections.singletonList(new Metadata(0, MetaType1_9.Byte, (byte) 0)));

        wrapper.send(Protocol1_9TO1_8.class);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

public void sendArmorUpdate(Player player) {
  // Ensure that the player is on our pipe
  if (!isOnPipe(player)) return;
  int armor = 0;
  for (ItemStack stack : player.getInventory().getArmorContents()) {
    armor += ArmorType.findById(stack.getTypeId()).getArmorPoints();
  }
  PacketWrapper wrapper = new PacketWrapper(0x4B, null, getUserConnection(player));
  try {
    wrapper.write(Type.VAR_INT, player.getEntityId()); // Player ID
    wrapper.write(Type.INT, 1); // only 1 property
    wrapper.write(Type.STRING, "generic.armor");
    wrapper.write(Type.DOUBLE, 0D); //default 0 armor
    wrapper.write(Type.VAR_INT, 1); // 1 modifier
    wrapper.write(Type.UUID, ARMOR_ATTRIBUTE); // armor modifier uuid
    wrapper.write(Type.DOUBLE, (double) armor); // the modifier value
    wrapper.write(Type.BYTE, (byte) 0);// the modifier operation, 0 is add number
    wrapper.send(Protocol1_9TO1_8.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
}

public void sendTeamPacket(boolean add, boolean now) {
  PacketWrapper wrapper = new PacketWrapper(0x41, null, getUser());
  wrapper.write(Type.STRING, "viaversion"); // Use viaversion as name
  if (add) {
    // add
    if (!teamExists) {
      wrapper.write(Type.BYTE, (byte) 0); // make team
      wrapper.write(Type.STRING, "viaversion");
      wrapper.write(Type.STRING, ""); // prefix
      wrapper.write(Type.STRING, ""); // suffix
      wrapper.write(Type.BYTE, (byte) 0); // friendly fire
      wrapper.write(Type.STRING, ""); // nametags
      wrapper.write(Type.STRING, "never"); // collision rule :)
      wrapper.write(Type.BYTE, (byte) 0); // color
    } else {
      wrapper.write(Type.BYTE, (byte) 3);
    }
    wrapper.write(Type.STRING_ARRAY, new String[]{getUser().get(ProtocolInfo.class).getUsername()});
  } else {
    wrapper.write(Type.BYTE, (byte) 1); // remove team
  }
  teamExists = add;
  try {
    wrapper.send(Protocol1_9TO1_8.class, true, now);
  } catch (Exception e) {
    e.printStackTrace();
  }
}

public void sendArmorUpdate(Player player) {
  // Ensure that the player is on our pipe
  if (!isOnPipe(player.getUniqueId())) return;
  int armor = 0;
  armor += calculate(player.getHelmet());
  armor += calculate(player.getChestplate());
  armor += calculate(player.getLeggings());
  armor += calculate(player.getBoots());
  PacketWrapper wrapper = new PacketWrapper(0x4B, null, getUserConnection(player.getUniqueId()));
  try {
    wrapper.write(Type.VAR_INT, getEntityId(player)); // Player ID
    wrapper.write(Type.INT, 1); // only 1 property
    wrapper.write(Type.STRING, "generic.armor");
    wrapper.write(Type.DOUBLE, 0D); //default 0 armor
    wrapper.write(Type.VAR_INT, 1); // 1 modifier
    wrapper.write(Type.UUID, ARMOR_ATTRIBUTE); // armor modifier uuid
    wrapper.write(Type.DOUBLE, (double) armor); // the modifier value
    wrapper.write(Type.BYTE, (byte) 0);// the modifier operation, 0 is add number
    wrapper.send(Protocol1_9TO1_8.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
}

public void sendArmorUpdate(Player player) {
  // Ensure that the player is on our pipe
  if (!isOnPipe(player.getUniqueId())) return;
  int armor = 0;
  armor += calculate(player.getHelmet());
  armor += calculate(player.getChestplate());
  armor += calculate(player.getLeggings());
  armor += calculate(player.getBoots());
  PacketWrapper wrapper = new PacketWrapper(0x4B, null, getUserConnection(player.getUniqueId()));
  try {
    wrapper.write(Type.VAR_INT, getEntityId(player)); // Player ID
    wrapper.write(Type.INT, 1); // only 1 property
    wrapper.write(Type.STRING, "generic.armor");
    wrapper.write(Type.DOUBLE, 0D); //default 0 armor
    wrapper.write(Type.VAR_INT, 1); // 1 modifier
    wrapper.write(Type.UUID, ARMOR_ATTRIBUTE); // armor modifier uuid
    wrapper.write(Type.DOUBLE, (double) armor); // the modifier value
    wrapper.write(Type.BYTE, (byte) 0);// the modifier operation, 0 is add number
    wrapper.send(Protocol1_9TO1_8.class);
  } catch (Exception e) {
    e.printStackTrace();
  }
}