marocchino-sticky-pull-request-comment/src/validate.ts

export function validateBody(
  body: string,
  deleteOldComment: boolean,
  hideOldComment: boolean,
): void {
  if (!deleteOldComment && !hideOldComment && !body) {
    throw new Error("Either message or path input is required")
  }
}

export function validateExclusiveModes(
  deleteOldComment: boolean,
  recreate: boolean,
  onlyCreateComment: boolean,
  onlyUpdateComment: boolean,
  hideOldComment: boolean,
  hideAndRecreate: boolean,
): void {
  const exclusiveModes: [string, boolean][] = [
    ["delete", deleteOldComment],
    ["recreate", recreate],
    ["only_create", onlyCreateComment],
    ["only_update", onlyUpdateComment],
    ["hide", hideOldComment],
    ["hide_and_recreate", hideAndRecreate],
  ]
  const enabledModes = exclusiveModes.filter(([, flag]) => flag).map(([name]) => name)
  if (enabledModes.length > 1) {
    const last = enabledModes[enabledModes.length - 1]
    const rest = enabledModes.slice(0, -1)
    const joined =
      enabledModes.length === 2 ? `${rest[0]} and ${last}` : `${rest.join(", ")}, and ${last}`
    throw new Error(`${joined} cannot be set to true simultaneously`)
  }
}