Show posts from TableView only from current user login - ios

Question

I have a viewcontroller displaying some post using a tableview and cells. All the datas are being fetched from Firebase ( Database and Users).
I have a login screen before to arrive to the feedview.
I'd like to show only the pots from the current user login in that tableview controller. How is that possible ?
My database is build like this:
For my Signin Page, I am using the following:
//
// ViewController.swift
// MobileAppDemo
//
// Created by Mikko Hilpinen on 27.10.2016.
// Copyright © 2016 Mikkomario. All rights reserved.
//
import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
import Firebase
import FirebaseAuth
import SwiftKeychainWrapper
fileprivate struct RegisterInfo
{
let email: String
let password: String
}
class SignInVC: UIViewController
{
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
override func viewDidLoad()
{
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool)
{
if User.currentUserId != nil
{
print("AUTH: USING EXISTING KEYCHAIN")
User.startTrackingCurrentUser()
//performSegue(withIdentifier: "ToFeed", sender: nil)
}
else
{
print("AUTH: NO EXSTING KEYCHAIN")
}
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
print("AUTH: Preparing for segue \(segue.identifier)")
if let registrationVC = segue.destination as? RegisterVC
{
print("AUTH: Found registration VC")
if let info = sender as? RegisterInfo
{
print("AUTH: Sending email (\(info.email)) and password (\(info.password.characters.count) chars) information: ")
registrationVC.setBaseInfo(email: info.email, password: info.password)
}
}
}
#IBAction func signInButtonPressed(_ sender: UIButton)
{
if let email = emailField.text, let password = passwordField.text
{
FIRAuth.auth()?.signIn(withEmail: email, password: password)
{
(user, error) in
if let error = error
{
// TODO: Handle other errors here as well
switch FIRAuthErrorCode(rawValue: error._code)!
{
case .errorCodeUserNotFound:
print("AUTH: USER NOT FOUND -> CREATING NEW USER")
print("AUTH: Sending email \(email) and password \(password.characters.count) characters")
self.performSegue(withIdentifier: "RegisterUser", sender: RegisterInfo(email: email, password: password))
default: print("AUTH: ERROR IN EMAIL LOGIN \(error)") // TODO: Inform user
}
}
else
{
print("AUTH: EMAIL AUTH SUCCESSFUL")
User.currentUserId = user?.uid
User.startTrackingCurrentUser()
self.performSegue(withIdentifier: "ToFeed", sender: nil)
}
}
}
// TODO: Inform user that the field contents are missing
}
fileprivate func firebaseAuth(with credential: FIRAuthCredential)
{
if FIRAuth.auth() == nil
{
print("AUTH: NO AUTH SERVICE AVAILABLE")
}
FIRAuth.auth()?.signIn(with: credential)
{
(user, error) in
if let error = error
{
print("AUTH: UNABLE TO AUTHENTICATE TO FIREBASE")
print("AUTH: \(error)")
}
else
{
if let user = user
{
print("AUTH: SUCCESSFULLY AUTHENTICATED WITH FIREBASE")
// Updates current user data
var userName = "User"
var image: UIImage?
if let retrievedName = user.displayName
{
userName = retrievedName
}
if let retrievedImageUrl = user.photoURL
{
if let data = try? Data(contentsOf: retrievedImageUrl)
{
image = UIImage(data: data)
}
}
User.post(uid: user.uid, provider: user.providerID, userName: userName, image: image)
{
user in
User.currentUser = user
User.startTrackingCurrentUser()
self.performSegue(withIdentifier: "ToFeed", sender: nil)
}
}
}
}
}
}
To display my data in the table view, I'm using this view controller:
//
// Feed.swift
// MobileAppDemo
//
// Created by Mikko Hilpinen on 31.10.2016.
// Copyright © 2016 Mikkomario. All rights reserved.
//
import UIKit
import FirebaseAuth
import FirebaseDatabase
import FirebaseStorage
import SwiftKeychainWrapper
import SwiftyJSON
var posts = [Post]()
var selectedIndexPath: Int = 0
class FeedVC: UIViewController, UITableViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UITableViewDelegate {
#IBOutlet weak var feedTableView: UITableView!
private var readPosts: ObserveTask?
override func viewDidLoad() {
super.viewDidLoad()
feedTableView.dataSource = self
feedTableView.delegate = self
readPosts = Post.observeList(from: Post.parentReference.queryOrdered(byChild: Post.PROPERTY_CREATED)) {
observedPosts in
posts = observedPosts.reversed()
self.feedTableView.reloadData()
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = self.feedTableView.dequeueReusableCell(withIdentifier: "MessageCell")! as UITableViewCell
let imageView = cell.viewWithTag(1) as! UIImageView
let titleLabel = cell.viewWithTag(2) as! UILabel
titleLabel.text = posts[indexPath.row].title
titleLabel.numberOfLines = 0
Storage.getImage(with: posts[indexPath.row].imageUrl){
postPic in
imageView.image = postPic
}
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedIndexPath = indexPath.row
self.performSegue(withIdentifier: "push", sender: self)
self.feedTableView.reloadData()
}
}
and finally for my Cells:
//
// MessageCell.swift
// MobileAppDemo
//
// Created by Mikko Hilpinen on 31.10.2016.
// Copyright © 2016 Mikkomario. All rights reserved.
//
import UIKit
import FirebaseStorage
class MessageCell: UITableViewCell
{
#IBOutlet weak var messageImageView: UIImageView!
#IBOutlet weak var messageTextView: UITextView!
#IBOutlet weak var titleTextView: UITextView!
#IBOutlet weak var linkbutton: UIButton!
private var post: Post!
func configureCell(tableView: UITableView, post: Post)
{
self.post = post
// Basic info
titleTextView.text = post.title
messageTextView.text = post.caption
// Post user
User.get(id: post.creatorId)
{
postCreator in
}
// Image
Storage.getImage(with: post.imageUrl)
{
postPic in
self.messageImageView.image = postPic
// Row height changes so table needs to be reset
tableView.beginUpdates()
tableView.endUpdates()
}
}
}
If anybody have any clue / suggestion how I can achieve it ?? It will be incredible :) :)
Thanks a lot !!!

Answer 1

With your Posts database reference with queryOrdered(byChild:) add queryEqual(toValue:) and compare it with User.currentUserId.
readPosts = Post.observeList(from: Post.parentReference
.queryOrdered(byChild: Post.PROPERTY_CREATED)
.queryEqual(toValue: User.currentUserId)) {
observedPosts in
posts = observedPosts.reversed()
self.feedTableView.reloadData()
}