[LOOP-4483] Study Product Selection

Author: Camji55

Loop/Managers/OnboardingManager.swift

@@ -435,6 +435,7 @@ extension OnboardingManager: TherapySettingsProvider {
 
 extension OnboardingManager: OnboardingProvider {
     var allowDebugFeatures: Bool { FeatureFlags.allowDebugFeatures }   // NOTE: DEBUG FEATURES - DEBUG AND TEST ONLY
+    var studyProductSelection: StudyProduct { StudyProduct(rawValue: UserDefaults.appGroup?.studyProductSelection ?? "none") ?? .none }
 }
 
 // MARK: - OnboardingUI

LoopCore/NSUserDefaults.swift

@@ -20,6 +20,7 @@ extension UserDefaults {
         case lastProfileExpirationAlertDate = "com.loopkit.Loop.lastProfileExpirationAlertDate"
         case allowDebugFeatures = "com.loopkit.Loop.allowDebugFeatures"
         case allowSimulators = "com.loopkit.Loop.allowSimulators"
+        case studyProductSelection = "com.loopkit.Loop.studyProductSelection"
         case resetLoop = "com.loopkit.Loop.resetLoop"
     }
 
@@ -128,6 +129,15 @@ extension UserDefaults {
         return bool(forKey: Key.allowSimulators.rawValue)
     }
 
+    public var studyProductSelection: String? {
+        get {
+            string(forKey: Key.studyProductSelection.rawValue)
+        }
+        set {
+            set(newValue, forKey: Key.studyProductSelection.rawValue)
+        }
+    }
+    
     public var resetLoop: Bool {
         get {
             bool(forKey: Key.resetLoop.rawValue)