done

ChattingApp/ChattingApp.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ChattingApp/ChattingApp.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ChattingApp/ChattingApp/AppDelegate.swift

@@ -0,0 +1,38 @@
+//
+//  AppDelegate.swift
+//  ChattingApp
+//
+//  Created by dmdm on 01/11/2021.
+//
+
+import UIKit
+import Firebase
+
+@main
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
+        FirebaseApp.configure()
+        return true
+    }
+
+    // MARK: UISceneSession Lifecycle
+
+    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
+        // Called when a new scene session is being created.
+        // Use this method to select a configuration to create the new scene with.
+        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
+    }
+
+    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
+        // Called when the user discards a scene session.
+        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
+        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
+    }
+
+
+}
+

ChattingApp/ChattingApp/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ChattingApp/ChattingApp/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ChattingApp/ChattingApp/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ChattingApp/ChattingApp/Assets.xcassets/icon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "icon.PNG",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ChattingApp/ChattingApp/ChatViewController.swift

@@ -0,0 +1,156 @@
+//
+//  ChatViewController.swift
+//  ChattingApp
+//
+//  Created by dmdm on 11/11/2021.
+//
+
+import UIKit
+import Firebase
+import FirebaseFirestore
+
+class ChatVC: UIViewController {
+    var user : User?
+    var messages = [Message]()
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        setupUI()
+        getAllMessages()
+        chatTableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
+    }
+    let chatTableView : UITableView = {
+        $0.translatesAutoresizingMaskIntoConstraints = false
+        return $0
+    }(UITableView())
+    let messageTextField : UITextField = {
+        $0.translatesAutoresizingMaskIntoConstraints = false
+        $0.placeholder = "Message..."
+        $0.backgroundColor = .init(white: 0.85, alpha: 1)
+        $0.layer.cornerRadius = 22.5
+        return $0
+    }(UITextField())
+    let sendButton : UIButton = {
+        $0.translatesAutoresizingMaskIntoConstraints = false
+        $0.setBackgroundImage(UIImage(systemName: "paperplane.circle.fill"), for: .normal)
+        $0.tintColor = .brown
+        $0.addTarget(self, action: #selector(sendMessage), for: .touchUpInside)
+        return $0
+    }(UIButton(type: .system))
+    func setupUI() {
+        view.backgroundColor = .white
+        navigationItem.title = user?.name
+        chatTableView.delegate = self
+        chatTableView.dataSource = self
+        view.addSubview(chatTableView)
+        view.addSubview(messageTextField)
+        view.addSubview(sendButton)
+        NSLayoutConstraint.activate([
+            chatTableView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
+            chatTableView.leftAnchor.constraint(equalTo: view.leftAnchor),
+            chatTableView.rightAnchor.constraint(equalTo: view.rightAnchor),
+            chatTableView.bottomAnchor.constraint(equalTo: messageTextField.topAnchor),
+            messageTextField.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 15),
+            messageTextField.rightAnchor.constraint(equalTo: sendButton.leftAnchor, constant: -5),//*****
+            messageTextField.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor),
+            messageTextField.heightAnchor.constraint(equalToConstant: 45),
+            sendButton.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -15),
+            sendButton.heightAnchor.constraint(equalTo: messageTextField.heightAnchor),
+            sendButton.widthAnchor.constraint(equalTo: sendButton.heightAnchor),
+            sendButton.centerYAnchor.constraint(equalTo: messageTextField.centerYAnchor)
+        ])
+    }
+}
+extension ChatVC : UITableViewDelegate , UITableViewDataSource {
+    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return messages.count
+    }
+    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = chatTableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
+        let currentUserID = Auth.auth().currentUser?.uid
+        cell.textLabel?.text = messages[indexPath.row].content
+        print(messages[indexPath.row].content)
+        if messages[indexPath.row].sender == currentUserID {
+            cell.textLabel?.textAlignment = .right
+            cell.textLabel?.textColor = .blue
+        } else {
+            cell.textLabel?.textAlignment = .left
+            cell.textLabel?.textColor = .red
+        }
+        return cell
+    }
+}
+extension ChatVC {
+    @objc func sendMessage() {
+        let messageId = UUID().uuidString
+        guard let currentUserID = Auth.auth().currentUser?.uid else {return}
+        guard let message = messageTextField.text else {return}
+        guard let user = user else {return}
+        Firestore.firestore().document("messages/\(messageId)").setData([
+            "sender" : currentUserID,
+            "receiver" : user.id!,
+            "content" : message,
+            "id": messageId,
+        ])
+        messageTextField.text = ""
+    }
+    func getAllMessages() {
+        guard let chatID = user?.id else {return}
+        guard let userID = Auth.auth().currentUser?.uid else {return}
+        self.messages.removeAll()
+        //self.chatTableView.reloadData()
+        // self.messages = []
+        Firestore.firestore()
+            .collection("messages")
+            .whereField("receiver", isEqualTo: userID)
+            .whereField("sender", isEqualTo: chatID)
+            .addSnapshotListener { snapshot, error in
+                //guard let userID = Auth.auth().currentUser?.uid else {return}
+                if error == nil {
+                    for document in snapshot!.documents{
+                        let data = document.data()
+                        let newMsg = Message(
+                            content: data["content"] as? String,
+                            sender: data["sender"] as? String,
+                            reciever: data["receiver"] as? String,
+                            id: (data["id"] as? String) ?? "",
+                            timestamp: (data["timestamp"] as? Timestamp) ?? Timestamp()
+                        )
+                        let isMsgAdded = self.messages.contains { msg in
+                            return msg.id == newMsg.id
+                        }
+                        if !isMsgAdded {
+                            self.messages.append(newMsg)
+                        }
+                    }
+                    self.chatTableView.reloadData()
+                }
+                //self.chatTableView.reloadData()
+            }
+        Firestore.firestore()
+            .collection("messages")
+            .whereField("sender", isEqualTo: userID)
+            .whereField("receiver", isEqualTo: chatID)
+            .addSnapshotListener { snapshot, error in
+                if error == nil {
+                    for document in snapshot!.documents{
+                        let data = document.data()
+                        let newMsg = Message(
+                            content: data["content"] as? String,
+                            sender: data["sender"] as? String,
+                            reciever: data["receiver"] as? String,
+                            id: (data["id"] as? String) ?? "",
+                            timestamp: (data["timestamp"] as? Timestamp) ?? Timestamp()
+                        )
+                        let isMsgAdded = self.messages.contains { msg in
+                            return msg.id == newMsg.id
+                        }
+                        if !isMsgAdded {
+                            self.messages.append(newMsg)
+                        }
+                        self.chatTableView.reloadData()
+                    }
+                }
+                // self.chatTableView.reloadData()
+            }
+    }
+}