[LOOP-2385] Propagating glucose unit changes (#357)

* therapy settings view model created in settings view model to allow propagation of glucose unit changes

* naming update to displayGlucoseUnit

Author: nhamming

Loop/View Models/SettingsViewModel.swift

@@ -84,7 +84,7 @@ public class SettingsViewModel: ObservableObject {
     let syncPumpSchedule: (() -> PumpManager.SyncSchedule?)?
     let sensitivityOverridesEnabled: Bool
     let supportInfoProvider: SupportInfoProvider
-        
+
     @Published var isClosedLoopAllowed: Bool
 
     var closedLoopPreference: Bool {
@@ -126,7 +126,7 @@ public class SettingsViewModel: ObservableObject {
         self.supportInfoProvider = supportInfoProvider
         self.availableSupports = availableSupports
         self.delegate = delegate
-        
+
         // This strangeness ensures the composed ViewModels' (ObservableObjects') changes get reported to this ViewModel (ObservableObject)
         notificationsCriticalAlertPermissionsViewModel.objectWillChange.sink { [weak self] in
             self?.objectWillChange.send()
@@ -144,6 +144,5 @@ public class SettingsViewModel: ObservableObject {
         isClosedLoopAllowed
             .assign(to: \.isClosedLoopAllowed, on: self)
             .store(in: &cancellables)
-        
     }
 }

Loop/Views/SettingsView.swift

@@ -13,6 +13,7 @@ import SwiftUI
 import HealthKit
 
 public struct SettingsView: View {
+    @EnvironmentObject private var displayGlucoseUnitObservable: DisplayGlucoseUnitObservable
     @Environment(\.dismiss) private var dismiss
     @Environment(\.appName) private var appName
     @Environment(\.guidanceColors) private var guidanceColors
@@ -121,6 +122,7 @@ extension SettingsView {
                                                             syncPumpSchedule: self.viewModel.syncPumpSchedule,
                                                             chartColors: .primary,
                                                             didSave: self.viewModel.didSave))
+                        .environmentObject(displayGlucoseUnitObservable)
                         .environment(\.dismiss, self.dismiss)
                         .environment(\.appName, self.appName)
                         .environment(\.carbTintColor, self.carbTintColor)