Managers

Libraries/Esiur/Resource/ResourceContext.cs

@@ -1,19 +1,22 @@
 using Esiur.Data;
 using Esiur.Security.Authority;
 using Esiur.Security.Permissions;
+using Esiur.Security.Management;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Security.Principal;
 using System.Text;
 
 namespace Esiur.Resource
 {
-    public class ResourceContext:IResourceContext
+    public class ResourceContext : IResourceContext, IResourceManagersContext
     {
         public ulong Age { get; }
         public Map<string, object> Attributes { get; }
         public Map<string, object> Properties { get; }
         public IPermissionsManager PermissionsManager { get; }
+        public IReadOnlyList<IResourceManager> ResourceManagers { get; }
 
         public ResourceContext(ulong age, Map<string, object> attributes, Map<string, object> properties, IPermissionsManager permissionsManager)
         {
@@ -21,6 +24,35 @@ namespace Esiur.Resource
             Attributes = attributes;
             Properties = properties;
             PermissionsManager = permissionsManager;
+            ResourceManagers = permissionsManager is null
+                ? Array.Empty<IResourceManager>()
+                : new IResourceManager[] { permissionsManager };
+        }
+
+        /// <summary>
+        /// Creates a context with one or more locally supplied managers. Every manager
+        /// must already be registered with the target Warehouse.
+        /// </summary>
+        public ResourceContext(
+            IEnumerable<IResourceManager> resourceManagers,
+            ulong age = 0,
+            Map<string, object> attributes = null,
+            Map<string, object> properties = null)
+        {
+            if (resourceManagers == null)
+                throw new ArgumentNullException(nameof(resourceManagers));
+
+            var managers = resourceManagers.ToArray();
+            if (managers.Any(manager => manager == null))
+                throw new ArgumentException(
+                    "Resource managers cannot contain null values.",
+                    nameof(resourceManagers));
+
+            Age = age;
+            Attributes = attributes;
+            Properties = properties;
+            ResourceManagers = Array.AsReadOnly(managers);
+            PermissionsManager = managers.OfType<IPermissionsManager>().FirstOrDefault();
         }
 
         //public virtual void Build()