//  Copyright 2019 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using System.Collections.Generic;
using System.Linq;

namespace NtApiDotNet
{
    internal class TokenPrivilegesBuilder
    {
        private List<LuidAndAttributes> _privs;

        public TokenPrivilegesBuilder()
        {
            _privs = new List<LuidAndAttributes>();
        }

        public void AddPrivilege(Luid luid, PrivilegeAttributes attributes)
        {
            LuidAndAttributes priv = new LuidAndAttributes
            {
                Luid = luid,
                Attributes = attributes
            };
            _privs.Add(priv);
        }

        public void AddPrivilege(TokenPrivilegeValue name, PrivilegeAttributes attributes)
        {
            Luid luid = new Luid((uint)name, 0);
            AddPrivilege(luid, attributes);
        }

        public void AddPrivilege(string name, bool enable)
        {
            AddPrivilege(new TokenPrivilege(name, enable ? PrivilegeAttributes.Enabled : PrivilegeAttributes.Disabled));
        }

        public void AddPrivilege(TokenPrivilege privilege)
        {
            AddPrivilege(privilege.Luid, privilege.Attributes);
        }

        public void AddPrivilegeRange(IEnumerable<TokenPrivilege> privileges)
        {
            _privs.AddRange(privileges.Select(p => new LuidAndAttributes() { Luid = p.Luid, Attributes = p.Attributes }));
        }

        public SafeTokenPrivilegesBuffer ToBuffer()
        {
            return new SafeTokenPrivilegesBuffer(_privs.ToArray());
        }
    }
#pragma warning restore 1591
}
