Implement class AppUpdater for checking AppVerison in Appstore

* call Singleton AppUpdater if needed
* PopUp with UpdateInfo if AppStoreVersion is different to local

GoldWars/GoldWars.xcodeproj/project.pbxproj

@@ -54,6 +54,7 @@
 		C064E9A8246C0EA50022B228 /* LabelNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = C064E9A7246C0EA50022B228 /* LabelNode.swift */; };
 		C064E9AA246C114C0022B228 /* LabelComponent.swift in Sources */ = {isa = PBXBuildFile; fileRef = C064E9A9246C114C0022B228 /* LabelComponent.swift */; };
 		C064E9AC246C151F0022B228 /* Label.swift in Sources */ = {isa = PBXBuildFile; fileRef = C064E9AB246C151F0022B228 /* Label.swift */; };
+		C078408B24936C96006E4269 /* AppUpdater.swift in Sources */ = {isa = PBXBuildFile; fileRef = C078408A24936C96006E4269 /* AppUpdater.swift */; };
 		C099579C246C5E5C0016AA22 /* DataService.swift in Sources */ = {isa = PBXBuildFile; fileRef = C099579B246C5E5C0016AA22 /* DataService.swift */; };
 /* End PBXBuildFile section */
 
@@ -120,6 +121,7 @@
 		C064E9A7246C0EA50022B228 /* LabelNode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LabelNode.swift; sourceTree = "<group>"; };
 		C064E9A9246C114C0022B228 /* LabelComponent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LabelComponent.swift; sourceTree = "<group>"; };
 		C064E9AB246C151F0022B228 /* Label.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Label.swift; sourceTree = "<group>"; };
+		C078408A24936C96006E4269 /* AppUpdater.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppUpdater.swift; sourceTree = "<group>"; };
 		C099579B246C5E5C0016AA22 /* DataService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DataService.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -185,6 +187,7 @@
 				C04783EF24685995004961FB /* SettingsScene.swift */,
 				3EAD889424801B6A0048A10A /* RoundTimer.swift */,
 				AB671B242494ECF0003FBE8D /* EloHelper.swift */,
+				C078408A24936C96006E4269 /* AppUpdater.swift */,
 			);
 			path = GoldWars;
 			sourceTree = "<group>";
@@ -421,6 +424,7 @@
 				3F745DF0246F48FC00CE7375 /* PlayerMoveType.swift in Sources */,
 				3EAD889524801B6A0048A10A /* RoundTimer.swift in Sources */,
 				3E67854024728368007B9DE4 /* CElements.swift in Sources */,
+				C078408B24936C96006E4269 /* AppUpdater.swift in Sources */,
 				ABA03DA0244BD54F00A66916 /* Base.swift in Sources */,
 				C064E9AC246C151F0022B228 /* Label.swift in Sources */,
 				ABC0C3732481509300387B8F /* MapUtils.swift in Sources */,

GoldWars/GoldWars/AppUpdater.swift

@@ -0,0 +1,124 @@
+//
+//  AppUpdater.swift
+//  GoldWars
+//
+//  Created by Tim Herbst on 12.06.20.
+//  Copyright © 2020 SP2. All rights reserved.
+//
+import UIKit
+
+enum VersionError: Error {
+    case invalidBundleInfo, invalidResponse
+}
+
+class LookupResult: Decodable {
+    var results: [AppInfo]
+}
+
+class AppInfo: Decodable {
+    var version: String
+    var trackViewUrl: String
+}
+
+class AppUpdater: NSObject {
+    static let appUpdaterInstance = AppUpdater()
+    
+    private override init() {
+        
+    }
+    
+    private func getAppInfo(completion: @escaping (AppInfo?, Error?) -> Void) -> URLSessionDataTask? {
+        guard let identifier = Bundle.main.infoDictionary?["CFBundleIdentifier"] as? String,
+            let url = URL(string: "http://itunes.apple.com/lookup?bundleId=\(identifier)") else {
+                DispatchQueue.main.async {
+                    completion(nil, VersionError.invalidBundleInfo)
+                }
+                return nil
+        }
+        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
+            do {
+                if error != nil { throw error! }
+                guard let data = data else { throw VersionError.invalidResponse }
+                
+                print("Data:::",data)
+                print("response###",response!)
+                
+                let result = try JSONDecoder().decode(LookupResult.self, from: data)
+                
+                let dictionary = try? JSONSerialization.jsonObject(with: data, options: .mutableLeaves)
+                
+                print("dictionary",dictionary!)
+                
+                
+                guard let info = result.results.first else { throw VersionError.invalidResponse }
+                print("result:::",result)
+                completion(info, nil)
+            } catch {
+                completion(nil, error)
+            }
+        }
+        task.resume()
+        print("task ******", task)
+        return task
+    }
+    
+    private func checkVersion(force: Bool) {
+        let info = Bundle.main.infoDictionary
+        let currentVersion = info?["CFBundleShortVersionString"] as? String
+        _ = getAppInfo { (info, error) in
+            let appStoreVersion = info?.version
+            if let error = error {
+                dump(error)
+            } else if appStoreVersion!.compare(currentVersion!, options: .numeric) {
+                DispatchQueue.main.async {
+                    //TODO: Really need UIKit-Alert? -> replace keyWindow (deprecated)
+                    let topController: UIViewController = UIApplication.shared.windows[0].rootViewController!
+                    
+                    topController.showAppUpdateAlert(Version: (info?.version)!, Force: force, AppURL: (info?.trackViewUrl)!)
+                    //END TODO
+                }
+            }
+        }
+    }
+    func showUpdateWithConfirmation() {
+        checkVersion(force : false)
+    }
+    func showUpdateWithForce() {
+        checkVersion(force : true)
+    }
+}
+extension UIViewController {
+    fileprivate func showAppUpdateAlert( Version : String, Force: Bool, AppURL: String) {
+        print("AppURL:::::",AppURL)
+        
+        let bundleName = Bundle.main.infoDictionary!["CFBundleDisplayName"] as! String;
+        let alertMessage = "\(bundleName) Version \(Version) is available on AppStore."
+        let alertTitle = "New Version"
+        
+        
+        let alertController = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: .alert)
+        
+        
+        if !Force {
+            let notNowButton = UIAlertAction(title: "Not Now", style: .default) { (action:UIAlertAction) in
+                print("Don't Call API");
+            }
+            alertController.addAction(notNowButton)
+        }
+        
+        let updateButton = UIAlertAction(title: "Update", style: .default) { (action:UIAlertAction) in
+            print("Call API");
+            print("No update")
+            guard let url = URL(string: AppURL) else {
+                return
+            }
+            if #available(iOS 13.2, *) {
+                UIApplication.shared.open(url, options: [:], completionHandler: nil)
+            } else {
+                UIApplication.shared.openURL(url)
+            }
+        }
+        alertController.addAction(updateButton)
+        self.present(alertController, animated: true, completion: nil)
+    }
+}