add WorkoutIconSelector to select icon and color for a Workout

WorkoutsPlus/Models/Workout.swift

@@ -5,7 +5,7 @@
 //  Created by Felix Förtsch on 10.08.24.
 //
 
-import Foundation
+import SwiftUI
 import SwiftData
 
 @Model
@@ -15,8 +15,12 @@ final class Workout: Nameable {
 		var id = UUID()
 		@Attribute(.unique) var name: String
 		
+		// Icon
+		var workoutIconSystemName = "figure.run.square.stack"
+		var workoutIconColorName = ColorName.black
+		
 		// Other properties and methods
-		var timestamp: Date = Date.now
+		var timestamp = Date.now
 		
 		@Relationship(deleteRule: .cascade) var workoutItems: [WorkoutItem] = []
 		
@@ -46,7 +50,64 @@ final class Workout: Nameable {
 						exercise.position = index
 				}
 		}
-		
+}
+
+extension Workout {
+		// This enum maps the system colors to enable storing them with the SwiftData model data as String.
+		// See Workout.workoutIconColorName for a usage example.
+		// TODO: Use a Macro to reduce this horrible contraption to something maintainable.
+		enum ColorName: String, Codable {
+				case black
+				case blue
+				case cyan
+				case gray
+				case green
+				case indigo
+				case mint
+				case orange
+				case pink
+				case purple
+				case red
+				case white
+				case yellow
+				
+				var color: Color {
+						switch self {
+						case .black: return .black
+						case .blue: return .blue
+						case .cyan: return .cyan
+						case .gray: return .gray
+						case .green: return .green
+						case .indigo: return .indigo
+						case .mint: return .mint
+						case .orange: return .orange
+						case .pink: return .pink
+						case .purple: return .purple
+						case .red: return .red
+						case .white: return .white
+						case .yellow: return .yellow
+						}
+				}
+				
+				static func fromColor(_ color: Color) -> ColorName? {
+						switch color {
+						case .black: return .black
+						case .blue: return .blue
+						case .cyan: return .cyan
+						case .gray: return .gray
+						case .green: return .green
+						case .indigo: return .indigo
+						case .mint: return .mint
+						case .orange: return .orange
+						case .pink: return .pink
+						case .purple: return .purple
+						case .red: return .red
+						case .white: return .white
+						case .yellow: return .yellow
+						default: return nil
+						}
+				}
+		}
 }
 
 extension Workout {