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GoalBook - A Hybrid Smart Client

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4.86/5 (24 votes)
25 Sep 2009CPOL10 min read 78.8K   834   69  
A WPF hybrid smart client that synchronises your goals with the Toodledo online To-do service.
//===============================================================================
// Goal Book.
// Copyright © 2009 Mark Brownsword. 
//===============================================================================

#region Using Statements
using System;
using System.Runtime.Serialization;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using Csla;
using Csla.Validation;
using GoalBook.Infrastructure.Properties;
#endregion

namespace GoalBook.Infrastructure
{
    /// <summary>
    /// Proxy type.
    /// </summary>
    [Serializable]
    public class Proxy : BusinessBase<Proxy>, IXmlSerializable
    {
        #region Constants and Enums
        #endregion

        #region Inner Classes and Structures
        #endregion

        #region Delegates and Events
        #endregion

        #region Instance and Shared Fields
        #endregion

        #region Constructors
        /// <summary>
        /// Constructor.
        /// </summary>
        public Proxy()
        {
            MarkAsChild();

            ValidationRules.CheckRules();
        }
        /// <summary>
        /// Constructor.
        /// </summary>        
        public Proxy(string host, string port, bool enabled)
            : this()
        {
            Host = host;
            Port = port;
            Enabled = enabled;
            
            base.MarkOld();
        }
        #endregion

        #region Properties
        private static PropertyInfo<string> hostProperty = RegisterProperty(typeof(Proxy), new PropertyInfo<string>("Host"));
        private static PropertyInfo<string> portProperty = RegisterProperty(typeof(Proxy), new PropertyInfo<string>("Port"));
        private static PropertyInfo<bool> enabledProperty = RegisterProperty(typeof(Proxy), new PropertyInfo<bool>("Enabled"));

        /// <summary>
        /// Reference to Host.
        /// </summary>
        public string Host
        {
            get
            {
                CanReadProperty(hostProperty.Name, true);
                return GetProperty(hostProperty);
            }
            set
            {
                CanWriteProperty(hostProperty.Name, true);
                if (!GetProperty(hostProperty).Equals(value))
                {
                    SetProperty(hostProperty, value);
                    PropertyHasChanged(hostProperty.Name);
                }
            }
        }
        /// <summary>
        /// Reference to Port.
        /// </summary>
        public string Port
        {
            get
            {
                CanReadProperty(portProperty.Name, true);
                return GetProperty(portProperty);
            }
            set
            {
                CanWriteProperty(portProperty.Name, true);
                if (!GetProperty(portProperty).Equals(value))
                {
                    SetProperty(portProperty, value);
                    PropertyHasChanged(portProperty.Name);
                }
            }
        }
        /// <summary>
        /// Reference to Enabled.
        /// </summary>
        public bool Enabled
        {
            get
            {
                CanReadProperty(enabledProperty.Name, true);
                return GetProperty(enabledProperty);
            }
            set
            {
                CanWriteProperty(enabledProperty.Name, true);
                if (!GetProperty(enabledProperty).Equals(value))
                {
                    SetProperty(enabledProperty, value);
                    if (value.Equals(false))                    
                    {
                        SetProperty(hostProperty, string.Empty);
                        SetProperty(portProperty, 0);
                    }
                    ValidationRules.CheckRules();
                    PropertyHasChanged(enabledProperty.Name);
                }
            }
        }
        #endregion

        #region Private and Protected Methods
        
        private static bool IsValidPortNumber(string input)
        {            
            ushort result = 0;
            if (ushort.TryParse(input, out result))
            {
                if (result >= 1024 && result <= 65535)
                {
                    return true;
                }
            }
           
            return false;
        }

        #endregion

        #region Public and internal Methods
        /// <summary>
        /// MapFields. 
        /// </summary>        
        public void MapFields(Proxy proxy)
        {
            this.Host = proxy.Host;
            this.Port = proxy.Port;
            this.Enabled = proxy.Enabled;
            
            ValidationRules.CheckRules();
        }
        /// <summary>
        /// HostValidator.
        /// Called by BusinessBase RulesEngine.
        /// </summary>        
        public static bool HostValidator<T>(T target, RuleArgs e) where T : Proxy
        {
            if (target.Enabled)
            {                
                if (!string.IsNullOrEmpty(target.Host)) { return true; }
                else { e.Description = Resources.ValidationHostMessage; }
            }
            else
            {
                return true;
            }

            return false;
        }
        /// <summary>
        /// PortValidator.
        /// Called by BusinessBase RulesEngine.
        /// </summary>        
        public static bool PortValidator<T>(T target, RuleArgs e) where T : Proxy
        {
            if (target.Enabled)
            {                
                if (IsValidPortNumber(target.Port)) { return true; }
                else { e.Description = Resources.ValidationPortMessage; }
            }
            else
            {
                return true;
            }

            return false;
        }
        
        #endregion

        #region Event Handlers
        /// <summary>
        /// OnDeserialized Handler.
        /// </summary>        
        [OnDeserialized()]
        private void OnDeserializedHandler(StreamingContext context)
        {
            base.OnDeserialized(context);

            //Execute business rules against each property
            //when the item is deserialized.

            //ValidationRules.SuppressRuleChecking = true;
            ValidationRules.CheckRules();
        }
        #endregion

        #region Base Class Overrides
        /// <summary>
        /// Add Business Rules. Defines basic validation rules to execute against specified fields.         
        /// </summary>
        protected override void AddBusinessRules()
        {
            //Host
            ValidationRules.AddRule(CommonRules.StringMaxLength, new CommonRules.MaxLengthRuleArgs(hostProperty, 255));
            ValidationRules.AddRule<Proxy>(HostValidator, hostProperty);

            //Port
            ValidationRules.AddRule(CommonRules.StringMaxLength, new CommonRules.MaxLengthRuleArgs(portProperty, 5));
            ValidationRules.AddRule<Proxy>(PortValidator, portProperty);
        }
        /// <summary>
        /// Override for GetIdValue.
        /// </summary>        
        protected override object GetIdValue()
        {
            return GetProperty(hostProperty);
        }
        #endregion

        #region IXmlSerializable Members
        public XmlSchema GetSchema()
        {
            return null;
        }
        public void ReadXml(XmlReader reader)
        {            
            Host = reader.GetAttribute(hostProperty.Name);
            Port = reader.GetAttribute(portProperty.Name);            
            bool enabled = false;
            if (bool.TryParse(reader.GetAttribute(enabledProperty.Name), out enabled))
            {
                Enabled = enabled;
            }

            base.MarkOld();
        }
        public void WriteXml(XmlWriter writer)
        {            
            writer.WriteAttributeString(hostProperty.Name, Host);
            writer.WriteAttributeString(portProperty.Name, Port);
            writer.WriteAttributeString(enabledProperty.Name, Enabled.ToString());
        }
        #endregion
    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior)
Australia Australia
I've been working as a software developer since 2000 and hold a Bachelor of Business degree from The Open Polytechnic of New Zealand. Computers are for people and I aim to build applications for people that they would want to use.

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