Multi-tenant role authorization

Oqtane.Server/Repository/Context/DBContextBase.cs

@@ -8,7 +8,7 @@ using System.Linq;
 
 namespace Oqtane.Repository
 {
-    public class DBContextBase : IdentityDbContext<IdentityUser>
+    public class DBContextBase :  IdentityUserContext<IdentityUser> 
     {
         private Tenant tenant;
         private IHttpContextAccessor accessor;

Oqtane.Server/Repository/Interfaces/ITenantResolver.cs

@@ -4,6 +4,7 @@ namespace Oqtane.Repository
 {
     public interface ITenantResolver
     {
+        Alias GetAlias();
         Tenant GetTenant();
     }
 }

Oqtane.Server/Repository/Interfaces/IUserRoleRepository.cs

@@ -7,6 +7,7 @@ namespace Oqtane.Repository
     {
         IEnumerable<UserRole> GetUserRoles();
         IEnumerable<UserRole> GetUserRoles(int UserId);
+        IEnumerable<UserRole> GetUserRoles(int UserId, int SiteId);
         UserRole AddUserRole(UserRole UserRole);
         UserRole UpdateUserRole(UserRole UserRole);
         UserRole GetUserRole(int UserRoleId);

Oqtane.Server/Repository/TenantResolver.cs

@@ -32,14 +32,25 @@ namespace Oqtane.Repository
             }
         }
 
-        public Tenant GetTenant()
+        public Alias GetAlias()
         {
             try
             {
                 IEnumerable<Alias> aliases = _aliasrepository.GetAliases(); // cached
-                Alias alias = aliases.Where(item => item.Name == aliasname).FirstOrDefault();
+                return aliases.Where(item => item.Name == aliasname).FirstOrDefault();
+            }
+            catch
+            {
+                throw;
+            }
+        }
+
+        public Tenant GetTenant()
+        {
+            try
+            {
                 IEnumerable<Tenant> tenants = _tenantrepository.GetTenants(); // cached
-                return tenants.Where(item => item.TenantId == alias.TenantId).FirstOrDefault();
+                return tenants.Where(item => item.TenantId == GetAlias().TenantId).FirstOrDefault();
             }
             catch
             {

Oqtane.Server/Repository/UserRoleRepository.cs

@@ -39,6 +39,21 @@ namespace Oqtane.Repository
             }
         }
 
+        public IEnumerable<UserRole> GetUserRoles(int UserId, int SiteId)
+        {
+            try
+            {
+                return db.UserRole.Where(item => item.UserId == UserId)
+                    .Include(item => item.Role) // eager load roles
+                    .Where(item => item.Role.SiteId == SiteId)
+                    .ToList();
+            }
+            catch
+            {
+                throw;
+            }
+        }
+
         public UserRole AddUserRole(UserRole UserRole)
         {
             try