foreign/node/src/wire/stream/get-streams.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 { wrapCommand } from '../command.utils.js';
import { COMMAND_CODE } from '../command.code.js';
import { deserializeToStream, type Stream } from './stream.utils.js';

/**
 * Get streams command definition.
 * Retrieves all streams.
 */
export const GET_STREAMS = {
  code: COMMAND_CODE.GetStreams,

  serialize: () => Buffer.alloc(0),

  deserialize: (r: CommandResponse) => {
    const payloadSize = r.data.length;
    const streams = [];
    let pos = 0;
    while (pos < payloadSize) {
      const { bytesRead, data } = deserializeToStream(r.data, pos)
      streams.push(data);
      pos += bytesRead;
    }
    return streams;
  }
};


/**
 * Executable get streams command function.
 */
export const getStreams = wrapCommand<void, Stream[]>(GET_STREAMS);