Function safeJoinLines

src/utils/stringUtils.ts:98–133

(
  lines: string[],
  delimiter: string = ',',
  maxSize: number = MAX_STRING_LENGTH,
)

 * @returns The joined string, truncated if necessary
 */
export function safeJoinLines(
  lines: string[],
  delimiter: string = ',',
  maxSize: number = MAX_STRING_LENGTH,
): string {
  const truncationMarker = '...[truncated]'
  let result = ''

  for (const line of lines) {
    const delimiterToAdd = result ? delimiter : ''
    const fullAddition = delimiterToAdd + line

    if (result.length + fullAddition.length <= maxSize) {
      // The full line fits
      result += fullAddition
    } else {
      // Need to truncate
      const remainingSpace =
        maxSize -
        result.length -
        delimiterToAdd.length -
        truncationMarker.length

      if (remainingSpace > 0) {
        // Add delimiter and as much of the line as will fit
        result +=
          delimiterToAdd + line.slice(0, remainingSpace) + truncationMarker
      } else {
        // No room for any of this line, just add truncation marker
        result += truncationMarker
      }
      return result
    }
  }
  return result
}

/**
 * A string accumulator that safely handles large outputs by truncating from the end