ntpa/MySql/Source/MySql.Web/Application.cs

// Copyright © 2009, 2011, Oracle and/or its affiliates. All rights reserved.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most 
// MySQL Connectors. There are special exceptions to the terms and 
// conditions of the GPLv2 as it is applied to this software, see the 
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify 
// it under the terms of the GNU General Public License as published 
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but 
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
// for more details.
//
// You should have received a copy of the GNU General Public License along 
// with this program; if not, write to the Free Software Foundation, Inc., 
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA

using System;
using System.Collections.Generic;
using System.Text;
using MySql.Data.MySqlClient;
using System.Configuration.Provider;
using MySql.Web.Properties;

namespace MySql.Web.General
{
  internal class Application
  {
    private long _id;
    private string _desc;

    public Application(string name, string desc)
    {
      Id = -1;
      Name = name;
      Description = desc;
    }
    public long Id
    {
      get { return _id; }
      private set { _id = value; }
    }
    public string Name;

    public string Description
    {
      get { return _desc; }
      private set { _desc = value; }
    }

    public long FetchId(MySqlConnection connection)
    {
      if (Id == -1)
      {
        MySqlCommand cmd = new MySqlCommand(
            @"SELECT id FROM my_aspnet_applications WHERE name=@name", connection);
        cmd.Parameters.AddWithValue("@name", Name);
        object id = cmd.ExecuteScalar();
        Id = id == null ? -1 : Convert.ToInt64(id);
      }
      return Id;
    }

    /// <summary>
    /// Creates the or fetch application id.
    /// </summary>
    /// <param name="applicationName">Name of the application.</param>
    /// <param name="applicationId">The application id.</param>
    /// <param name="applicationDesc">The application desc.</param>
    /// <param name="connection">The connection.</param>
    public long EnsureId(MySqlConnection connection)
    {
      // first try and retrieve the existing id
      if (FetchId(connection) <= 0)
      {
        MySqlCommand cmd = new MySqlCommand(
            "INSERT INTO my_aspnet_applications VALUES (NULL, @appName, @appDesc)", connection);
        cmd.Parameters.AddWithValue("@appName", Name);
        cmd.Parameters.AddWithValue("@appDesc", Description);
        int recordsAffected = cmd.ExecuteNonQuery();
        if (recordsAffected != 1)
          throw new ProviderException(Resources.UnableToCreateApplication);

        Id = cmd.LastInsertedId;
      }
      return Id;
    }
  }
}