Add IsAvailableToHost & HostFeatureValueProvider & HostFeatureManagementProvider.

framework/src/Volo.Abp.Features/Volo/Abp/Features/AbpFeaturesModule.cs

@@ -26,6 +26,7 @@ namespace Volo.Abp.Features
             context.Services.Configure<AbpFeatureOptions>(options =>
             {
                 options.ValueProviders.Add<DefaultValueFeatureValueProvider>();
+                options.ValueProviders.Add<HostFeatureValueProvider>();
                 options.ValueProviders.Add<EditionFeatureValueProvider>();
                 options.ValueProviders.Add<TenantFeatureValueProvider>();
             });

framework/src/Volo.Abp.Features/Volo/Abp/Features/FeatureDefinition.cs

@@ -51,6 +51,12 @@ namespace Volo.Abp.Features
         /// </summary>
         public bool IsVisibleToClients { get; set; }
 
+        /// <summary>
+        /// Can host use this feature.
+        /// Default: true.
+        /// </summary>
+        public bool IsAvailableToHost { get; set; }
+
         /// <summary>
         /// A list of allowed providers to get/set value of this feature.
         /// An empty list indicates that all providers are allowed.
@@ -93,7 +99,8 @@ namespace Volo.Abp.Features
             ILocalizableString displayName = null,
             ILocalizableString description = null,
             IStringValueType valueType = null,
-            bool isVisibleToClients = true)
+            bool isVisibleToClients = true,
+            bool isAvailableToHost = true)
         {
             Name = name;
             DefaultValue = defaultValue;
@@ -101,6 +108,7 @@ namespace Volo.Abp.Features
             Description = description;
             ValueType = valueType;
             IsVisibleToClients = isVisibleToClients;
+            IsAvailableToHost = isAvailableToHost;
 
             Properties = new Dictionary<string, object>();
             AllowedProviders = new List<string>();
@@ -136,20 +144,22 @@ namespace Volo.Abp.Features
         /// </summary>
         /// <returns>Returns a newly created child feature</returns>
         public FeatureDefinition CreateChild(
-            string name, 
-            string defaultValue = null, 
-            ILocalizableString displayName = null, 
+            string name,
+            string defaultValue = null,
+            ILocalizableString displayName = null,
             ILocalizableString description = null,
             IStringValueType valueType = null,
-            bool isVisibleToClients = true)
+            bool isVisibleToClients = true,
+            bool isAvailableToHost = true)
         {
             var feature = new FeatureDefinition(
-                name, 
-                defaultValue, 
-                displayName, 
+                name,
+                defaultValue,
+                displayName,
                 description,
                 valueType,
-                isVisibleToClients)
+                isVisibleToClients,
+                isAvailableToHost)
             {
                 Parent = this
             };
@@ -175,4 +185,4 @@ namespace Volo.Abp.Features
             return $"[{nameof(FeatureDefinition)}: {Name}]";
         }
     }
-}
+}

framework/src/Volo.Abp.Features/Volo/Abp/Features/HostFeatureValueProvider.cs

@@ -0,0 +1,30 @@
+using System.Threading.Tasks;
+using Volo.Abp.MultiTenancy;
+
+namespace Volo.Abp.Features
+{
+    public class HostFeatureValueProvider : FeatureValueProvider
+    {
+        public const string ProviderName = "H";
+
+        public override string Name => ProviderName;
+
+        protected ICurrentTenant CurrentTenant { get; }
+
+        public HostFeatureValueProvider(IFeatureStore featureStore, ICurrentTenant currentTenant)
+            : base(featureStore)
+        {
+            CurrentTenant = currentTenant;
+        }
+
+        public override async Task<string> GetOrNullAsync(FeatureDefinition feature)
+        {
+            if (CurrentTenant.Id.HasValue || !feature.IsAvailableToHost)
+            {
+                return null;
+            }
+
+            return await FeatureStore.GetOrNullAsync(feature.Name, Name, null);
+        }
+    }
+}

modules/feature-management/src/Volo.Abp.FeatureManagement.Domain/Volo/Abp/FeatureManagement/AbpFeatureManagementDomainModule.cs

@@ -1,10 +1,8 @@
 using Volo.Abp.Caching;
 using Volo.Abp.FeatureManagement.Localization;
 using Volo.Abp.Features;
-using Volo.Abp.Localization;
 using Volo.Abp.Localization.ExceptionHandling;
 using Volo.Abp.Modularity;
-using Volo.Abp.VirtualFileSystem;
 
 namespace Volo.Abp.FeatureManagement
 {
@@ -20,6 +18,7 @@ namespace Volo.Abp.FeatureManagement
             Configure<FeatureManagementOptions>(options =>
             {
                 options.Providers.Add<DefaultValueFeatureManagementProvider>();
+                options.Providers.Add<HostFeatureManagementProvider>();
                 options.Providers.Add<EditionFeatureManagementProvider>();
 
                 //TODO: Should be moved to the Tenant Management module

modules/feature-management/src/Volo.Abp.FeatureManagement.Domain/Volo/Abp/FeatureManagement/HostFeatureManagementProvider.cs

@@ -0,0 +1,59 @@
+using System.Threading.Tasks;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Features;
+using Volo.Abp.MultiTenancy;
+
+namespace Volo.Abp.FeatureManagement
+{
+    public class HostFeatureManagementProvider : FeatureManagementProvider, ITransientDependency
+    {
+        public override string Name => HostFeatureValueProvider.ProviderName;
+
+        protected ICurrentTenant CurrentTenant { get; }
+
+        public HostFeatureManagementProvider(
+            IFeatureManagementStore store,
+            ICurrentTenant currentTenant)
+            : base(store)
+        {
+            CurrentTenant = currentTenant;
+        }
+
+        public override async Task<string> GetOrNullAsync(FeatureDefinition feature, string providerKey)
+        {
+            if (IsHostSide(feature))
+            {
+                return await Store.GetOrNullAsync(feature.Name, Name, NormalizeProviderKey(providerKey));
+            }
+
+            return null;
+        }
+
+        public override async Task SetAsync(FeatureDefinition feature, string value, string providerKey)
+        {
+            if (IsHostSide(feature))
+            {
+                await Store.SetAsync(feature.Name, value, Name, NormalizeProviderKey(providerKey));
+            }
+        }
+
+        public override async Task ClearAsync(FeatureDefinition feature, string providerKey)
+        {
+            if (IsHostSide(feature))
+            {
+                await Store.DeleteAsync(feature.Name, Name, NormalizeProviderKey(providerKey));
+            }
+        }
+
+        protected override string NormalizeProviderKey(string providerKey)
+        {
+            return null;
+        }
+
+        //TODO: Should throw an ex when there is not in the host side?
+        protected virtual bool IsHostSide(FeatureDefinition feature)
+        {
+            return feature.IsAvailableToHost && CurrentTenant.Id == null;
+        }
+    }
+}