PlatformMethodHandler.swift

//
//  PlatformMethodHandler.swift
//  Runner
//
//  Created by Tigran Kirakosyan on 11/23/20.
//  Copyright © 2020 The Chromium Authors. All rights reserved.
//

import Flutter
import MSAL

class PlatformMethodHandler {

    var controller: FlutterViewController
    var notificationData: [AnyHashable : Any]?

    init(controller: FlutterViewController) {
        self.controller = controller
    }
        
    func msLogin(result: @escaping FlutterResult) {

         let kClientID = "300aafe3-a0bb-4d29-b497-683c16c87ece"
         let kAuthority = "https://login.microsoftonline.com/organizations"
         let kRedirectUri = "msauth.global.raiser://auth"
         let kScopes: [String] = ["user.read","email"]

         var applicationContext : MSALPublicClientApplication?
         var webViewParamaters : MSALWebviewParameters?

         guard let authorityURL = URL(string: kAuthority) else {
            result(FlutterError(code: "FAIL", message: "Unable to create authority URL", details: nil))
            return
         }

        let authority = try? MSALAADAuthority(url: authorityURL)

         let msalConfiguration = MSALPublicClientApplicationConfig(clientId: kClientID,
                                                                   redirectUri: kRedirectUri,
                                                                   authority: authority)
         applicationContext = try? MSALPublicClientApplication(configuration: msalConfiguration)
        webViewParamaters = MSALWebviewParameters(authPresentationViewController: controller)

         guard let appContext = applicationContext else {
            result(FlutterError(code: "FAIL", message: "Unable to create applicationContext", details: nil))
            return
         }

         guard let webViewParams = webViewParamaters else {
            result(FlutterError(code: "FAIL", message: "Unable to create webViewParamaters", details: nil))
            return
         }

         let parameters = MSALInteractiveTokenParameters(scopes: kScopes, webviewParameters: webViewParams)
        parameters.promptType = .selectAccount
         appContext.acquireToken(with: parameters) {  (res, error) in

             if let error = error {
                let msalError = error as NSError
                if msalError.code == MSALError.userCanceled.rawValue {
                    result(FlutterError(code: "-50005", message: "User cancel the operation", details: nil))
                    return
                }
                result(FlutterError(code: "FAIL", message: "Could not acquire token: \(error)", details: nil))
                return
             }
             guard let res = res else {
                result(FlutterError(code: "FAIL", message: "Could not acquire token: No result returned", details: nil))
                return
             }

            let retResult: [String : String] = ["accessToken" : res.accessToken, "authenticationScheme": "Bearer", "idToken" : res.idToken!]
            result(retResult)
         }
     }
    

    func getNotificationData(result: FlutterResult) {
        if let delegate = UIApplication.shared.delegate as? AppDelegate {
            delegate.isKilled = false
        }
        result(notificationData)
    }
    
    func getFirebaseData(result: FlutterResult, deviceToken: String, fcmToken: String) {
        result(["deviceToken" : deviceToken, "fcmToken" : fcmToken])
    }

}