AlterUserStatement.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    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;
using System.IO;
using System.Linq;

using Deveel.Data.Security;
using Deveel.Data.Serialization;
using Deveel.Data.Sql.Expressions;

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class AlterUserStatement : SqlStatement, IPreparable {
        public AlterUserStatement(string userName, IAlterUserAction alterAction) {
            if (alterAction == null)
                throw new ArgumentNullException("alterAction");
            if (String.IsNullOrEmpty(userName))
                throw new ArgumentNullException("userName");

            UserName = userName;
            AlterAction = alterAction;
        }

        private AlterUserStatement(ObjectData data) {
            UserName = data.GetString("UserName");
            AlterAction = data.GetValue<IAlterUserAction>("Action");
        }

        public string UserName { get; private set; }

        public IAlterUserAction AlterAction { get; private set; }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var action = AlterAction;
            if (action is IPreparable)
                action = ((IPreparable)action).Prepare(preparer) as IAlterUserAction;

            return new AlterUserStatement(UserName, action);
        }

        protected override void GetData(SerializeData data) {
            data.SetValue("UserName", UserName);
            data.SetValue("Action", AlterAction);
        }

        protected override void ExecuteStatement(ExecutionContext context) {
            if (AlterAction.ActionType == AlterUserActionType.SetPassword) {
                var password = ((SqlConstantExpression)((SetPasswordAction)AlterAction).PasswordExpression).Value.ToString();
                context.Request.Query.AlterUserPassword(UserName, password);
            } else if (AlterAction.ActionType == AlterUserActionType.SetGroups) {
                var groupNames = ((SetUserGroupsAction)AlterAction).Groups
                    .Cast<SqlConstantExpression>()
                    .Select(x => x.Value.Value.ToString())
                    .ToArray();

                context.Request.Query.SetUserGroups(UserName, groupNames);
            } else if (AlterAction.ActionType == AlterUserActionType.SetAccountStatus) {
                context.Request.Query.SetUserStatus(UserName, ((SetAccountStatusAction)AlterAction).Status);
            }
        }
    }
}