Likes

  likes: sui::table::Table<address, u8>

  public fun add(
      likes: &mut Likes,
      key: address
  ) {
      likes.likes.add(key, LIKE);
  }

  public fun assert_has_not_liked(
      likes: &Likes,
      key: address
  ) {
      let has_liked = has_liked(
          likes,
          key
      );

      assert!(!has_liked, EAlreadyLiked);
  }

  public fun create(
      ctx: &mut TxContext
  ): Likes {
      let likes = Likes {
          likes: table::new(ctx)
      };

      likes
  }

  public fun get_length(
      likes: &Likes
  ): u64 {
      likes.likes.length()
  }

  public fun has_liked(
      likes: &Likes,
      key: address
  ): bool {
      likes.likes.contains(key)
  }