Function toggleStar

database/scripts/main.ts:154–170

* Star/unstar post.

(postRef: DatabaseReference, uid: string)

 * Star/unstar post.
 */
function toggleStar(postRef: DatabaseReference, uid: string) {
  runTransaction(postRef, function (post) {
    if (post) {
      if (post.stars && post.stars[uid]) {
        post.starCount--;
        post.stars[uid] = null;
      } else {
        post.starCount++;
        if (!post.stars) {
          post.stars = {};
        }
        post.stars[uid] = true;
      }
    }
    return post;
  });
}

/**
 * Creates a post element.