add Workout, Exercise and their Library, Add, and Details views

WorkoutsPlus/Workout/WorkoutLibrary.swift

@@ -0,0 +1,96 @@
+//
+//  WorkoutLibraryView.swift
+//  WorkoutsPlus
+//
+//  Created by Felix Förtsch on 10.08.24.
+//
+
+import SwiftUI
+import SwiftData
+
+struct WorkoutLibrary: View {
+		@Environment(\.modelContext) private var modelContext
+		@Query(sort: \Workout.name) private var workouts: [Workout]
+		
+		@State private var newWorkout: Workout?
+
+		var body: some View {
+				NavigationSplitView {
+						Group {
+								if !workouts.isEmpty {
+										List {
+												ForEach(workouts) { workout in
+														NavigationLink {
+																WorkoutDetail(workout: workout)
+														} label: {
+																Text(workout.name)
+														}
+												}
+												.onDelete(perform: deleteWorkout)
+										}
+								} else {
+										ContentUnavailableView {
+												Label("No Workouts", systemImage: "figure.run.square.stack")
+										}
+								}
+						}
+						.navigationBarTitle("Workouts")
+						.toolbar {
+								ToolbarItem(placement: .topBarLeading) {
+										EditButton()
+								}
+								ToolbarItem {
+										Button(action: addWorkout) {
+												Label("Add Workout", systemImage: "plus")
+										}
+								}
+						}
+						.sheet(item: $newWorkout) { workout in
+								NavigationStack {
+										AddWorkout(workout: workout)
+								}
+								.interactiveDismissDisabled()
+						}
+				} detail: {
+						// TODO: What does this Detail do?
+						Text("Select a workout")
+								.navigationTitle("Movie")
+				}
+		}
+		
+		private func addWorkout() {
+				withAnimation {
+						let item = Workout(name: "")
+						modelContext.insert(item)
+						newWorkout = item
+				}
+		}
+		
+		// TODO: Brauchen wir das?
+		private func saveWorkout(workout: Workout) {
+				if !workout.name.isEmpty {
+						modelContext.insert(workout)
+						try? modelContext.save()
+				}
+		}
+		
+		private func deleteWorkout(offsets: IndexSet) {
+				withAnimation {
+						for index in offsets {
+								modelContext.delete(workouts[index])
+						}
+						try? modelContext.save()
+				}
+		}
+}
+
+#Preview("With Sample Data") {
+		WorkoutLibrary()
+				.modelContainer(SampleData.shared.modelContainer)
+}
+
+#Preview("Empty Database") {
+		WorkoutLibrary()
+				.modelContainer(for: Workout.self, inMemory: true)
+}
+