Why is it that every time I call fetchfollowingposts, the post user changes? - swift

Question

Any time the function "fetchfollowingposts" is called, the user's information in the feed cell changes. I've saved the post to firebase with the user's uid and i'm trying to fetch their profilephoto, fullname, etc. from the uid tied to the post. Any time I refresh the feedview, the user's information changes but the post itself never does (timestamp, post caption, post image, likes).
Since I don't fully understand the problem, I wasn't sure what files are needed so just let me know if i missed one. Thank you in advance for any help!
FeedCellView
import SwiftUI
import Kingfisher
struct FeedCell: View {
#ObservedObject var viewModel: FeedCellViewModel
#State private var isShowingBottomSheet = false
var didLike: Bool { return viewModel.post.didLike ?? false }
#Environment(\.presentationMode) var mode
init(viewModel: FeedCellViewModel) {
self.viewModel = viewModel
}
var body: some View {
VStack (alignment: .leading, spacing: 16) {
NavigationLink {
if let user = viewModel.post.user {
LazyView(ProfileView(user: user))
}
} label: {
HStack (alignment: .top) {
KFImage(URL(string: viewModel.post.user?.profileImageUrl ?? "https://firebasestorage.googleapis.com/v0/b/pageturner-951b4.appspot.com/o/profile_image%2FNoProfilePhoto.png?alt=media&token=1055648d-4d6e-4d51-b003-948a47b6bb76"))
.resizable()
.scaledToFill()
.frame(width: 48, height: 48)
.cornerRadius(10)
VStack (alignment: .leading, spacing: 4) {
Text(viewModel.post.user?.fullname ?? "")
.font(.system(size: 16))
.foregroundColor(Color(.label))
Text(viewModel.timestampString)
.font(.system(size: 14))
.foregroundColor(.gray)
}
Spacer()
if viewModel.post.isCurrentUser {
Button {
isShowingBottomSheet.toggle()
} label: {
Image(systemName: "ellipsis")
}.foregroundColor(Color(.gray))
.confirmationDialog("What do you want to do?",
isPresented: $isShowingBottomSheet) {
Button("Delete post", role: .destructive) {
viewModel.deletePost()
}
} message: {
Text("You cannot undo this action")
}
}
}
}
Text(viewModel.post.caption)
.font(.system(size: 16))
if let image = viewModel.post.imageUrl {
KFImage(URL(string: image))
.resizable()
.scaledToFill()
.frame(maxHeight: 250)
.cornerRadius(10)
}
HStack {
HStack (spacing: 24) {
Button {
didLike ? viewModel.unlike() : viewModel.like()
} label: {
Image(didLike ? "heart.fill" : "heart")
.renderingMode(.template)
.resizable()
.foregroundColor(didLike ? Color.accentColor : .black)
.frame(width: 24, height: 24)
Text("\(viewModel.post.likes)")
}
NavigationLink {
CommentView(post: viewModel.post)
} label: {
Image("comment")
.renderingMode(.template)
.resizable()
.frame(width: 24, height: 24)
Text("\(viewModel.post.stats?.CommentCount ?? 0)")
}
}
Spacer()
}
.foregroundColor(Color(.label))
}
}
}
FeedService
import SwiftUI
import FirebaseCore
import FirebaseAuth
import FirebaseFirestore
import FirebaseFirestoreSwift
struct FeedService {
func uploadPost(caption: String, image: UIImage?, completion: #escaping(Bool) -> Void) {
guard let uid = Auth.auth().currentUser?.uid else { return }
ImageUploader.uploadImage(image: image, type: .post) { imageUrl in
let data = ["uid": uid,
"caption": caption,
"likes": 0,
"imageUrl": imageUrl,
"timestamp": Timestamp(date: Date())] as [String: Any]
COLLECTION_POSTS.document()
.setData(data) { error in
if let error = error {
print("DEBUG: Failed to upload post with error: \(error.localizedDescription)")
completion(false)
return
}
}
completion(true)
}
}
func fetchFollowingPosts(forUid uid: String, completion: #escaping([Post]) -> Void) {
var posts = [Post]()
COLLECTION_FOLLOWING.document(uid).collection("user-following")
.getDocuments { snapshot, _ in
guard let documents = snapshot?.documents else { return }
documents.forEach { doc in
let userId = doc.documentID
COLLECTION_POSTS.whereField("uid", isEqualTo: userId)
.getDocuments { snapshot, _ in
guard let documents = snapshot?.documents else { return }
let post = documents.compactMap({ try? $0.data(as: Post.self) })
posts.append(contentsOf: post)
completion(posts.sorted(by: { $0.timestamp.dateValue() > $1.timestamp.dateValue()
}))
}
}
}
}
func uploadStory(caption: String?, image: UIImage, rating: Int?, completion: #escaping(Bool) -> Void) {
guard let uid = Auth.auth().currentUser?.uid else { return }
ImageUploader.uploadImage(image: image, type: .story) { imageUrl in
let data = ["uid": uid,
"caption": caption ?? "",
"imageUrl": imageUrl,
"rating": rating ?? "",
"isSeen": false,
"timestamp": Timestamp(date: Date())] as [String: Any]
COLLECTION_STORIES.document()
.setData(data) { error in
if let error = error {
print("DEBUG: Failed to upload story with error: \(error.localizedDescription)")
completion(false)
return
}
}
completion(true)
}
}
func fetchFollowingStories(forUid uid: String, completion: #escaping([Story]) -> Void) {
var stories = [Story]()
COLLECTION_FOLLOWING.document(uid).collection("user-following")
.getDocuments { snapshot, _ in
guard let documents = snapshot?.documents else { return }
documents.forEach { doc in
let userId = doc.documentID
COLLECTION_STORIES.whereField("uid", isEqualTo: userId)
.getDocuments { snapshot, _ in
guard let documents = snapshot?.documents else { return }
let story = documents.compactMap({ try? $0.data(as: Story.self) })
stories.append(contentsOf: story)
completion(stories.sorted(by: { $0.timestamp.dateValue() > $1.timestamp.dateValue()
}))
}
}
}
}
}
FeedViewModel
import SwiftUI
class FeedViewModel: ObservableObject {
#Published var followingPosts = [Post]()
#Published var followingStories = [Story]()
let service = FeedService()
let userService = UserService()
init() {
fetchFollowingPosts()
fetchFollowingStories()
}
func fetchFollowingPosts() {
guard let userid = AuthViewModel.shared.userSession?.uid else { return }
service.fetchFollowingPosts(forUid: userid) { posts in
self.followingPosts = posts
for i in 0 ..< posts.count {
let uid = posts[i].uid
self.userService.fetchUser(withUid: uid) { user in
self.followingPosts[i].user = user
}
}
}
}
func fetchFollowingStories() {
guard let userid = AuthViewModel.shared.userSession?.uid else { return }
service.fetchFollowingStories(forUid: userid) { stories in
self.followingStories = stories
for i in 0 ..< stories.count {
let uid = stories[i].uid
self.userService.fetchUser(withUid: uid) { user in
self.followingStories[i].user = user
}
}
}
}
}