Version 3.0.381

SharedBusinessLogic/Services/ThemeNS/ITheme.cs

@@ -0,0 +1,17 @@
+
+namespace ShareeBike.Services.ThemeNS
+{
+	/// <summary>
+	/// Set of available app themes
+	/// </summary>
+	public enum ThemeSet
+	{
+		ShareeBike,
+		LastenradBayern
+	}
+
+	public interface ITheme
+	{
+		void SetActiveTheme(string themeName);
+	}
+}

SharedBusinessLogic/Services/ThemeNS/Theme.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using Xamarin.Forms;
+
+namespace ShareeBike.Services.ThemeNS
+{
+	/// <summary>
+	/// Manges themeing functionalty.
+	/// Objects ResourceDictionary, Themes.ShareeBike, ... need Xamarin.Forms framework to be initialized which might break tests.
+	/// </summary>
+	public class Theme : ITheme
+	{
+		private ICollection<ResourceDictionary> _MergedDictionaries;
+
+		public Theme(ICollection<ResourceDictionary> mergedDictionaries)
+		{
+			_MergedDictionaries = mergedDictionaries ?? throw new ArgumentNullException(nameof(mergedDictionaries));
+		}
+
+		/// <summary>
+		/// Sets active theme. 
+		/// </summary>
+		/// <param name="themeName">Name of the new active theme.</param>
+		public void SetActiveTheme(string themeName)
+		{
+			if (!Enum.TryParse(themeName, false, out ThemeSet theme))
+				return;
+
+			if (_MergedDictionaries == null)
+				return;
+
+			_MergedDictionaries.Clear();
+
+			switch (theme)
+			{
+				case ThemeSet.LastenradBayern:
+					_MergedDictionaries.Add(new Themes.LastenradBayern());
+					break;
+
+				default:
+					_MergedDictionaries.Add(new Themes.ShareeBike());
+					break;
+			}
+		}
+	}
+}