unlikePost method

  1. @override
Future<TimelinePost> unlikePost(
  1. String userId,
  2. TimelinePost post
)

Implementation

@override
Future<TimelinePost> unlikePost(String userId, TimelinePost post) async {
  // update the post with the new like
  var updatedPost = post.copyWith(
    likes: post.likes - 1,
    likedBy: post.likedBy?..remove(userId),
  );
  posts = posts
      .map(
        (p) => p.id == post.id ? updatedPost : p,
      )
      .toList();
  var postRef = _db.collection(_options.timelineCollectionName).doc(post.id);
  await postRef.update({
    'likes': FieldValue.increment(-1),
    'liked_by': FieldValue.arrayRemove([userId]),
  });
  notifyListeners();
  return updatedPost;
}