Function writeNewPost

database/scripts/main.ts:123–149

* Saves a new post to the Firebase DB.

(
  uid: string,
  username: string | null,
  picture: string | null,
  title: string,
  body: string,
)

 * Saves a new post to the Firebase DB.
 */
function writeNewPost(
  uid: string,
  username: string | null,
  picture: string | null,
  title: string,
  body: string,
) {
  // A post entry.
  const postData: Post = {
    author: username,
    uid: uid,
    body: body,
    title: title,
    starCount: 0,
    authorPic: picture,
  };

  // Get a key for a new Post.
  const newPostKey = push(child(ref(database), 'posts')).key;

  // Write the new post's data simultaneously in the posts list and the user's post list.
  const updates: Record<string, Post> = {};
  updates['/posts/' + newPostKey] = postData;
  updates['/user-posts/' + uid + '/' + newPostKey] = postData;

  return update(ref(database), updates);
}

/**
 * Star/unstar post.