foreign/node/src/wire/partition/partition.utils.ts

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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import { serializeIdentifier, type Id } from '../identifier.utils.js';
import { uint32ToBuf } from '../number.utils.js';

/**
 * Serializes partition parameters for create/delete operations.
 *
 * @param streamId - Stream identifier (ID or name)
 * @param topicId - Topic identifier (ID or name)
 * @param partitionCount - Number of partitions (1-1000)
 * @returns Buffer containing serialized partition request
 * @throws Error if partitionCount is not between 1 and 1000
 */
export const serializePartitionParams = (
  streamId: Id, topicId: Id, partitionCount = 1,
) => {

  if (partitionCount < 1 || partitionCount > 1000)
    throw new Error('Topic partition_count must be between 1 and 1000');

  const streamIdentifier = serializeIdentifier(streamId);
  const topicIdentifier = serializeIdentifier(topicId);
  const b = uint32ToBuf(partitionCount);

  return Buffer.concat([
    streamIdentifier,
    topicIdentifier,
    b,
  ])
};