talk/src/core/server/models/comment/helpers.ts

import { Comment, Revision } from ".";
import { VISIBLE_STATUSES } from "./constants";

/**
 * hasAncestors will check to see if a given comment has any ancestors.
 *
 * @param comment the comment to check the ancestors on
 */
export function hasAncestors(
  comment: Pick<Comment, "ancestorIDs" | "parentID">
): comment is Required<Pick<Comment, "ancestorIDs" | "parentID">> {
  return Boolean(comment.ancestorIDs.length > 0);
}

/**
 * hasVisibleStatus will check to see if the comment has a visibility status
 * where readers could see it.
 *
 * @param comment the comment to check the status on
 */
export function hasVisibleStatus(comment: Pick<Comment, "status">): boolean {
  return VISIBLE_STATUSES.includes(comment.status);
}

/**
 * getLatestRevision will get the latest revision from a Comment.
 *
 * @param comment the comment that contains the revisions
 */
export function getLatestRevision(
  comment: Pick<Comment, "revisions">
): Revision {
  return comment.revisions[comment.revisions.length - 1];
}