create ER diagram, refactor to conform to diagram, simplify session management

WorkoutsPlus/ActiveWorkout/ActiveWorkoutSession.swift

@@ -8,50 +8,21 @@ struct ActiveWorkoutSession: View {
 		@State var isTimerRunning: Bool = true
 		
 		@Query(sort: \WorkoutSession.name) var workoutSessions: [WorkoutSession]
-		@State var activeWorkoutSession: WorkoutSession?
-		@Default(\.activeWorkoutSessionId) var activeWorkoutSessionId
+		@Binding var activeWorkoutSession: WorkoutSession?
 		
 		@Query(sort: \Workout.name) var workouts: [Workout]
-		@State var activeWorkout: Workout?
-		@Default(\.activeWorkoutId) var activeWorkoutId
+		@State var activeWorkout: Workout
 		
 		var body: some View {
 				VStack {
 						List {
-								Section(header: Text("Workout"), footer: Text(activeWorkoutSession?.creationDate.ISO8601Format() ?? "Unknown Date")) {
-										NavigationLink(destination: {
-												ItemPicker<Workout>(selectedItem: $activeWorkout, items: workouts)
-										}) {
-												Text(activeWorkout?.name ?? "Select Workout")
-										}
-										.onChange(of: activeWorkout) { _, newWorkout in
-												if let newWorkout {
-														activeWorkoutId = newWorkout.id.uuidString
-														activeWorkoutSession?.workout = newWorkout
-												}
-										}
+								Section(header: Text("Workout")) {
+										Text(activeWorkout.name)
 								}
-								
-								if let activeWorkout {
-										Section(header: Text("Exercises")) {
-												ForEach(getActiveWorkoutItems(activeWorkout: activeWorkout)) { workoutItem in
-														ActiveWorkoutSessionListItem(workoutItem: workoutItem)
-												}
+								Section(header: Text("Exercises")) {
+										ForEach(getActiveWorkoutItems(activeWorkout: activeWorkout)) { workoutItem in
+												ActiveWorkoutSessionListItem(workoutItem: workoutItem)
 										}
-								} else {
-										ContentUnavailableView {
-												Label("Select a Workout", systemImage: "arrow.up")
-										}
-								}
-						}
-						// MARK: Workout Controls
-						if (isWorkingOut) {
-								if activeWorkoutSession != nil {
-										ActiveWorkoutSessionControls(
-												session: Binding(
-														get: { self.activeWorkoutSession! },
-														set: { self.activeWorkoutSession = $0 }
-												))
 								}
 						}
 				}
@@ -70,12 +41,11 @@ struct ActiveWorkoutSession: View {
 								.bold()
 								.fontDesign(.rounded)
 								.tint(.red)
-						} else {
+						}
+						else {
 								Button(action: {
 										isWorkingOut = true
-										if let activeWorkout {
-												activeWorkoutSession?.start(with: activeWorkout)
-										}
+										activeWorkoutSession = activeWorkout.start()
 								}) {
 										HStack {
 												Image(systemName: "play.fill")
@@ -87,25 +57,6 @@ struct ActiveWorkoutSession: View {
 								.tint(.green)
 						}
 				}
-				.onAppear {
-						if let activeWorkoutSession = getItem(from: workoutSessions, by: activeWorkoutSessionId) {
-								self.activeWorkoutSession = activeWorkoutSession
-								if let workout = getItem(from: workouts, by: activeWorkoutId) {
-										self.activeWorkout = workout
-								}
-						} else {
-								createNewWorkoutSession()
-						}
-				}
-		}
-		
-		private func createNewWorkoutSession() {
-				let newWorkoutSession = WorkoutSession()
-				activeWorkoutSessionId = newWorkoutSession.id.uuidString
-				if let selectedWorkout = getItem(from: workouts, by: activeWorkoutId) {
-						newWorkoutSession.workout = selectedWorkout
-				}
-				self.activeWorkoutSession = newWorkoutSession
 		}
 		
 		private func getActiveWorkoutItems(activeWorkout: Workout?) -> [WorkoutItem] {
@@ -120,10 +71,12 @@ struct ActiveWorkoutSession: View {
 		}
 }
 
-#Preview("RR Selected") {
-		@Previewable @State var activeWorkout = Workout.sampleData.first!
+#Preview {
+		@Previewable @State var activeWorkoutSession: WorkoutSession?
+		@Previewable @State var workout = Workout.sampleData.first!
+		
 		NavigationStack {
-				ActiveWorkoutSession(activeWorkout: activeWorkout)
+				ActiveWorkoutSession(activeWorkoutSession: $activeWorkoutSession, activeWorkout: workout)
 		}
 		.onAppear {
 				Defaults.shared.isWorkingOut = false
@@ -131,18 +84,13 @@ struct ActiveWorkoutSession: View {
 		.modelContainer(SampleData.shared.modelContainer)
 }
 
-#Preview("No Workout Selected") {
-		NavigationStack {
-				ActiveWorkoutSession()
-		}
-		.onAppear {
-				Defaults.shared.isWorkingOut = false
-		}
-		.modelContainer(SampleData.shared.modelContainer)
-}
-
-#Preview("No Workout Data available") {
-		NavigationStack {
-				ActiveWorkoutSession()
-		}
-}
+//#Preview("Empty modelContainer") {
+//		@Previewable @State var activeWorkoutSession: WorkoutSession?
+//
+//		NavigationStack {
+//				ActiveWorkoutSession(activeWorkoutSession: $activeWorkoutSession)
+//		}
+//		.onAppear {
+//				Defaults.shared.isWorkingOut = false
+//		}
+//}