foreign/node/src/wire/consumer-group/create-group.command.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */


import type { CommandResponse } from '../../client/client.type.js';
import { serializeIdentifier, type Id } from '../identifier.utils.js';
import { wrapCommand } from '../command.utils.js';
import { deserializeConsumerGroup, type ConsumerGroup } from './group.utils.js';

export type CreateGroup = {
  streamId: Id,
  topicId: Id,
  groupId: number,
  name: string,
};

export const CREATE_GROUP = {
  code: 602,

  serialize: ({ streamId, topicId, groupId, name }: CreateGroup) => {
    const bName = Buffer.from(name);

    if (bName.length < 1 || bName.length > 255)
      throw new Error('Consumer group name should be between 1 and 255 bytes');

    const b = Buffer.allocUnsafe(5);
    b.writeUInt32LE(groupId);
    b.writeUInt8(bName.length, 4);

    return Buffer.concat([
      serializeIdentifier(streamId),
      serializeIdentifier(topicId),
      b,
      bName
    ]);
  },

  deserialize: (r: CommandResponse) => {
    return deserializeConsumerGroup(r.data).data;
  }
};

export const createGroup = wrapCommand<CreateGroup, ConsumerGroup>(CREATE_GROUP);