Deleting Posts from Firebase - swift

Question

I want to delete a post, if the post has equal/more then 5 dislikes. I implemented the counter part and this works already. But the post will not be deleted even if I have 6 dislikes like on this post below:
Here you can see my database.
This is the code, I want to delete the posts after 5 dislikes:
// Dislike Button
func addTapGestureToDislikeImageView() {
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDidTapDislike))
dislikeImageView.addGestureRecognizer(tapGesture)
dislikeImageView.isUserInteractionEnabled = true
}
#objc func handleDidTapDislike() {
guard let postId = post?.id else { return }
PostApi.shared.incrementDislikes(postId: postId, onSuccess: { (post) in
self.updateDislike(post: post)
self.post?.dislikes = post.dislikes
self.post?.isDisliked = post.isDisliked
self.post?.dislikeCount = post.dislikeCount
}, onError: { (errorMessage) in
ProgressHUD.showError(errorMessage)
})
}
func updateDislike(post: PostModel) {
if post.isDisliked == false || post.dislikes == nil {
dislikeImageView.image = UIImage(named: "icons8-gefaellt-nicht-50")
} else {
dislikeImageView.image = UIImage(named: "icons8-gefaellt-nicht-filled-50")
}
guard let count = post.dislikeCount else { return }
if count >= 5 {
deletePost()
}
}
func deletePost() {
// Remove the post from the DB
let ref = Database.database().reference()
ref.child("posts").child((post?.id)!).removeValue { error,ref in
if error != nil {
print(error!.localizedDescription)
}
}
}
Here I increment Dislikes:
func incrementDislikes(postId id: String, onSuccess: #escaping (PostModel) -> Void, onError: #escaping (_ errorMessage: String?) -> Void) {
let postRef = REF_POSTS.child(id)
postRef.runTransactionBlock({ (currentData: MutableData) -> TransactionResult in
if var post = currentData.value as? [String : AnyObject], let uid = UserApi.shared.CURRENT_USER_ID {
var dislikes: Dictionary<String, Bool>
dislikes = post["dislikes"] as? [String : Bool] ?? [:]
var dislikeCount = post["dislikeCount"] as? Int ?? 0
if let _ = dislikes[uid] {
// Unstar the post and remove self from stars
dislikeCount -= 1
dislikes.removeValue(forKey: uid)
} else {
// Star the post and add self to stars
dislikeCount += 1
dislikes[uid] = true
}
post["dislikeCount"] = dislikeCount as AnyObject?
post["dislikes"] = dislikes as AnyObject?
// Set value and report transaction success
currentData.value = post
return TransactionResult.success(withValue: currentData)
}
return TransactionResult.success(withValue: currentData)
}) { (error, committed, snapshot) in
if let error = error {
onError(error.localizedDescription)
}
guard let dic = snapshot?.value as? [String: Any] else { return }
guard let postId = snapshot?.key else { return }
let updatePost = PostModel(dictionary: dic, key: postId)
onSuccess(updatePost)
}
}
Thanks for your help!

Answer 1

I think you need to share more information, or any error you see, or debug it and test where the action stops. But try this one maybe it will work.
#objc func handleDidTapDislike() {
guard let postId = post?.id else { return }
PostApi.shared.incrementDislikes(postId: postId, onSuccess: { (post) in
self.updateDislike(post: post)
self.post?.dislikes = post.dislikes
self.post?.isDisliked = post.isDisliked
self.post?.dislikeCount = post.dislikeCount
if post.dislikeCount > 4 {
deletePost()
}
}, onError: { (errorMessage) in
ProgressHUD.showError(errorMessage)
})}
and then edit updateDislike() function
func updateDislike(post: PostModel) {
if post.isDisliked == false || post.dislikes == nil {
dislikeImageView.image = UIImage(named: "icons8-gefaellt-nicht-50")
} else {
dislikeImageView.image = UIImage(named: "icons8-gefaellt-nicht-filled-50")
}
}