@timebyping/semantic-release-slack-bot/lib/chunkifier.js

A slack bot for semantic-release notifying release statuses

/**
 * Copyright © Time By Ping, Inc. 2025. All rights reserved.
 *
 * Any unauthorized reproduction, distribution, public display, public
 * performance or derivatization thereof can constitute, among other things, an
 * infringement of Time By Ping Inc.'s exclusive rights under the Copyright Law
 * of the U.S. (17 U.S.C. § 106) and may subject the infringer thereof to
 * severe legal liability.
 */
export const chunkifyArray = (messageLines, maxLength, delimiter) => {
  delimiter = delimiter || '\n';

  let message = '';
  const resultLines = [];
  messageLines.forEach((line) => {
    // the next chunk is made up of the (next) line and the delimiter
    const nextChunk = line + delimiter;
    // if the message plus the next chunk puts us over the maxLength limit...
    if ((message + nextChunk).length > maxLength) {
      // ...we add the message to the result array...
      resultLines.push(message.trimEnd());
      // ...and "reset" the message with the next chunk.
      message = nextChunk;
    } else {
      // if not, we add the next chunk to the message
      message += nextChunk;
    }
  });

  // handle the case where we have a trailing message
  if (message.length > 0) {
    resultLines.push(message.trimEnd());
  }

  return resultLines;
};

export const chunkifyString = (messageText, maxLength, delimiter) => {
  if (messageText.length <= maxLength) {
    return [messageText];
  }

  delimiter = delimiter || '\n';
  const messageLines = messageText.split(delimiter);

  return chunkifyArray(messageLines, maxLength, delimiter);
};