COVIDSafe code from version 1.8 (#15)

CovidSafe/API/MessageAPI.swift

@@ -0,0 +1,102 @@
+//
+//  MessageAPI.swift
+//  CovidSafe
+//
+//  Copyright © 2020 Australian Government. All rights reserved.
+//
+
+import Foundation
+import Alamofire
+import KeychainSwift
+
+class MessageAPI {
+    
+    static let keyLastApiUpdate = "keyLastApiUpdate"
+
+    
+    static func getMessagesIfNeeded(completion: @escaping (MessageResponse?, Swift.Error?) -> Void) {
+        if shouldGetMessages() {
+            guard let token = UserDefaults.standard.string(forKey: "deviceTokenForAPN") else {
+                return
+            }
+            // Make API call to get messages
+            let messageRequest = MessageRequest(remotePushToken: token)
+            getMessages(msgRequest: messageRequest, completion: completion)
+        }
+    }
+    
+    private static func shouldGetMessages() -> Bool {
+        let lastChecked = UserDefaults.standard.double(forKey: keyLastApiUpdate)
+        var shouldGetMessages = true
+        
+        let calendar = NSCalendar.current
+        let currentDate = calendar.startOfDay(for: Date())
+        
+        if lastChecked > 0 {
+            let lastCheckedDate = Date(timeIntervalSince1970: lastChecked)
+            let components = calendar.dateComponents([.day], from: lastCheckedDate, to: currentDate)
+            
+            if let numDays = components.day {
+                shouldGetMessages = numDays > 0
+            }
+        }
+        
+        return shouldGetMessages
+    }
+    
+    static func getMessages(msgRequest: MessageRequest,
+                            completion: @escaping (MessageResponse?, Swift.Error?) -> Void) {
+        let keychain = KeychainSwift()
+        guard let apiHost = PlistHelper.getvalueFromInfoPlist(withKey: "API_Host", plistName: "CovidCare-config") else {
+            return
+        }
+        
+        guard let token = keychain.get("JWT_TOKEN") else {
+            completion(nil, nil)
+            return
+        }
+        let headers: HTTPHeaders = [
+            "Authorization": "Bearer \(token)"
+        ]
+        
+        var params = [
+            "os" : "ios-\(UIDevice.current.systemVersion)"
+            ]
+
+        if let buildString = Bundle.main.version {
+            params["appversion"] = "\(buildString)"
+        }
+        if let remoteToken = msgRequest.remotePushToken {
+            params["token"] = remoteToken
+        }
+        CovidNetworking.shared.session.request("\(apiHost)/messages",
+            method: .get,
+            parameters: params,
+            headers: headers
+        ).validate().responseDecodable(of: MessageResponse.self) { (response) in
+                switch response.result {
+                case .success:
+                    guard let messageResponse = response.value else { return }
+                    
+                    // save successful timestamp
+                    let calendar = NSCalendar.current
+                    let currentDate = calendar.startOfDay(for: Date())
+                    UserDefaults.standard.set(currentDate.timeIntervalSince1970, forKey: keyLastApiUpdate)
+                    
+                    completion(messageResponse, nil)
+                case let .failure(error):
+                    completion(nil, error)
+                }
+        }
+    }
+}
+
+struct MessageRequest {
+    var remotePushToken: String?
+}
+
+struct MessageResponse: Decodable {
+  let message: String
+  let forceappupgrade: Bool
+  
+}