Feature/2854 version management

bwi/ServerMaintenance/ValidAppVersionsDefaultService.swift

@@ -91,7 +91,7 @@ import Foundation
 }
 
 extension  ValidAppVersionsDefaultService : ValidAppVersionsService {
-    
+
     @objc func isCurrentAppVersionOutdated() -> Bool {
         return currentAppVersionState() == .outdated || currentAppVersionState() == .deprecated
     }
@@ -100,4 +100,12 @@ extension  ValidAppVersionsDefaultService : ValidAppVersionsService {
         return currentAppVersionState() == .deprecated
     }
     
+    @objc func wasOutdatedAlertShown() -> Bool {
+        return UserDefaults.standard.bool(forKey: "BWIOutdatedAlertShown")
+    }
+
+    @objc func setOutdatedAlertShown(_ shown: Bool) {
+        UserDefaults.standard.set(shown, forKey: "BWIOutdatedAlertShown")
+        UserDefaults.standard.synchronize()
+    }
 }