Added settings implementation to Windows project.

src/Mobile/eShopOnContainers/eShopOnContainers.Windows/Services/SettingsServiceImplementation.cs

@@ -0,0 +1,99 @@
+using eShopOnContainers.Core.Services.Settings;
+using eShopOnContainers.Windows.Services;
+using Windows.Storage;
+
+[assembly: Xamarin.Forms.Dependency(typeof(SettingsServiceImplementation))]
+namespace eShopOnContainers.Windows.Services
+{
+    public class SettingsServiceImplementation : ISettingsServiceImplementation
+    {
+        #region Internal Implementation
+
+        readonly object _locker = new object();
+
+        ApplicationDataContainer GetAppSettings()
+        {
+            return ApplicationData.Current.LocalSettings;
+        }
+
+        bool AddOrUpdateValueInternal<T>(string key, T value)
+        {
+            bool valueChanged = false;
+
+            if (value == null)
+            {
+                Remove(key);
+                return true;
+            }
+
+            lock (_locker)
+            {
+                var settings = GetAppSettings();
+                if (settings.Values.ContainsKey(key))
+                {
+                    if (settings.Values[key] != (object)value)
+                    {
+                        settings.Values[key] = value;
+                        valueChanged = true;
+                    }
+                }
+                else
+                {
+                    settings.Values[key] = value;
+                    valueChanged = true;
+                }
+            }
+
+            return valueChanged;
+        }
+
+        T GetValueOrDefaultInternal<T>(string key, T defaultValue = default(T))
+        {
+            object value;
+
+            lock (_locker)
+            {
+                var settings = GetAppSettings();
+                if (settings.Values.ContainsKey(key))
+                {
+                    var tempValue = settings.Values[key];
+                    if (tempValue != null)
+                        value = (T)tempValue;
+                    else
+                        value = defaultValue;
+                }
+                else
+                {
+                    value = defaultValue;
+                }
+            }
+            return null != value ? (T)value : defaultValue;
+        }
+
+        #endregion
+
+        #region ISettingsServiceImplementation
+
+        public bool AddOrUpdateValue(string key, bool value) => AddOrUpdateValueInternal(key, value);
+
+        public bool AddOrUpdateValue(string key, string value) => AddOrUpdateValueInternal(key, value);
+
+        public bool GetValueOrDefault(string key, bool defaultValue) => GetValueOrDefaultInternal(key, defaultValue);
+
+        public string GetValueOrDefault(string key, string defaultValue) => GetValueOrDefaultInternal(key, defaultValue);
+
+        public void Remove(string key)
+        {
+            lock (_locker)
+            {
+                var settings = GetAppSettings();
+                if (settings.Values.ContainsKey(key))
+                {
+                    settings.Values.Remove(key);
+                }
+            }
+        }
+
+        #endregion
+    }
+}

src/Mobile/eShopOnContainers/eShopOnContainers.Windows/eShopOnContainers.Windows.csproj

@@ -121,6 +121,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Renderers\CustomTabbedPageRenderer.cs" />
     <Compile Include="Renderers\SlideDownMenuPageRenderer.cs" />
+    <Compile Include="Services\SettingsServiceImplementation.cs" />
   </ItemGroup>
   <ItemGroup>
     <AppxManifest Include="Package.appxmanifest">