//******************************************************************************************************//  ConsoleHostBase.cs - Gbtc////  Copyright © 2010, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), 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.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  08/14/2014 - J. Ritchie Carroll//       Generated original version of source code.////****************************************************************************************************** using System;using System.Security.Principal;using System.Text;using System.Threading;using GSF.Identity;using GSF.Reflection; namespace GSF.TimeSeries{    /// <summary>    /// Console application operations used to host the time-series framework service.    /// </summary>    public class ConsoleHost    {        #region [ Members ]         // Fields        private readonly ServiceHostBase m_serviceHost;        private readonly ConsoleColor m_originalForegroundColor;        private readonly IPrincipal m_consoleHostPrincipal;        private readonly Guid m_clientID;        private readonly object m_displayLock;         #endregion         #region [ Constructors ]         /// <summary>        /// Creates new <see cref="ConsoleHost"/>.        /// </summary>        /// <param name="serviceHost">Service host instance.</param>        public ConsoleHost(ServiceHostBase serviceHost)        {            m_serviceHost = serviceHost;            m_originalForegroundColor = System.Console.ForegroundColor;            m_consoleHostPrincipal = new GenericPrincipal(new GenericIdentity("ConsoleHost"), new[] { "Administrator" });            m_clientID = Guid.NewGuid();            m_displayLock = new object();        }         #endregion         #region [ Methods ]         /// <summary>        /// Runs the console host.        /// </summary>        public void Run()        {            if ((object)m_serviceHost == null)                throw new NullReferenceException("Service host reference is null");             string userInput = "";             try            {                m_serviceHost.UpdatedStatus += m_serviceHost_UpdatedStatus;                m_serviceHost.StartHostedService();                m_serviceHost.SendRequest(m_consoleHostPrincipal, m_clientID, "Filter -Remove 0");                 while (!string.Equals(userInput, "Exit", StringComparison.OrdinalIgnoreCase))                {                    // Wait for a command from the user.                     userInput = System.Console.ReadLine();                     // Write a blank line to the console.                    WriteLine();                     if (!string.IsNullOrWhiteSpace(userInput))                    {                        // The user typed in a command and didn't just hit <ENTER>.                         switch (userInput.ToUpper())                        {                            case "CLS":                                // User wants to clear the console window.                                 System.Console.Clear();                                break;                            case "EXIT":                                // User wants to exit hosted session.                                break;                            default:                                // User wants to send a request to the service.                                 m_serviceHost.SendRequest(m_consoleHostPrincipal, m_clientID, userInput);                                 if (string.Compare(userInput, "Help", StringComparison.OrdinalIgnoreCase) == 0)                                    DisplayHelp();                                 break;                        }                    }                }            }            finally            {                m_serviceHost.StopHostedService();                m_serviceHost.UpdatedStatus -= m_serviceHost_UpdatedStatus;            }        }         private void m_serviceHost_UpdatedStatus(object sender, EventArgs<Guid, string, UpdateType> e)        {            if (e.Argument1 != m_clientID)                return;             lock (m_displayLock)            {                // Output status updates from the service to the console window.                switch (e.Argument3)                {                    case UpdateType.Alarm:                        System.Console.ForegroundColor = ConsoleColor.Red;                        break;                    case UpdateType.Warning:                        System.Console.ForegroundColor = ConsoleColor.Yellow;                        break;                }                 Write(e.Argument2);                System.Console.ForegroundColor = m_originalForegroundColor;            }        }         private void DisplayHelp()        {            StringBuilder help = new StringBuilder();             help.AppendFormat("Commands supported by {0}:", AssemblyInfo.EntryAssembly.Name);            help.AppendLine();            help.AppendLine();            help.Append("Command".PadRight(20));            help.Append(" ");            help.Append("Description".PadRight(55));            help.AppendLine();            help.Append(new string('-', 20));            help.Append(" ");            help.Append(new string('-', 55));            help.AppendLine();            help.Append("Cls".PadRight(20));            help.Append(" ");            help.Append("Clears this console screen".PadRight(55));            help.AppendLine();            help.Append("Exit".PadRight(20));            help.Append(" ");            help.Append("Exits this console screen".PadRight(55));            help.AppendLine();            help.AppendLine();            help.AppendLine();             Write(help.ToString());        }         private void Write(string format, params object[] args)        {            lock (m_displayLock)            {                if (args.Length == 0)                    System.Console.Write(format);                else                    System.Console.Write(format, args);            }        }         private void WriteLine()        {            lock (m_displayLock)            {                System.Console.WriteLine();            }        }         private void WriteLine(string format, params object[] args)        {            lock (m_displayLock)            {                if (args.Length == 0)                    System.Console.WriteLine(format);                else                    System.Console.WriteLine(format, args);            }        }         #endregion    }}