Fix:Alert Controller in logout cell in SettingVC (#501)

* Alert Controller in logout cell

* Changes done

Author: baquer

Susi/Controllers/SettingsController/SettingsViewController.swift

@@ -125,8 +125,19 @@ class SettingsViewController: UITableViewController {
             } else if row == 2 {
                 presentResetPasswordController()
             } else if row == 3 {
-                logoutUser()
-            } 
+                if logoutTitle.text == ControllerConstants.Settings.logout.localized() {
+                    let logoutAlert = UIAlertController(title: ControllerConstants.Logout.title, message: ControllerConstants.Logout.message, preferredStyle: UIAlertController.Style.alert)
+                    logoutAlert.addAction(UIAlertAction(title: ControllerConstants.Logout.cancel, style: .default, handler: { (action: UIAlertAction!) in
+                        logoutAlert.dismiss(animated: true, completion: nil)
+                    }))
+                    logoutAlert.addAction(UIAlertAction(title: ControllerConstants.Logout.confirm, style: .destructive, handler: { (action: UIAlertAction!) in
+                        self.logoutUser()
+                    }))
+                    present(logoutAlert, animated: true, completion: nil)
+                } else {
+                    logoutUser()
+                }
+           }
         }
         tableView.deselectRow(at: indexPath, animated: true)
     }

Susi/Helpers/ControllerConstants.swift

@@ -273,5 +273,12 @@ class ControllerConstants {
         static let reportIssueURL = "https://github.com/fossasia/susi_iOS/issues"
         static let licenseURL = "https://github.com/fossasia/susi_iOS/blob/master/LICENSE"
     }
+    
+    struct Logout {
+        static let title = "Logout"
+        static let message = "Are you sure, you want to log out?"
+        static let cancel = "Cancel"
+        static let confirm = "Confirm"
+    }
 
 }