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GoalBook - A Hybrid Smart Client

, 25 Sep 2009
A WPF hybrid smart client that synchronises your goals with the Toodledo online To-do service.
Prize winner in Competition "Smart Client Article Contest"
GoalBook.zip
GoalBook
Dependencies
CAG WPF 2
Microsoft.Practices.Composite.dll
Microsoft.Practices.Composite.Presentation.dll
Microsoft.Practices.Composite.UnityExtensions.dll
Microsoft.Practices.ObjectBuilder2.dll
Microsoft.Practices.ServiceLocation.dll
Microsoft.Practices.Unity.dll
vssver2.scc
CSLA
Csla.dll
Csla.XmlSerializers.dll
vssver2.scc
Infragistics
Infragistics3.Wpf.DataPresenter.v9.1.Express.dll
Infragistics3.Wpf.Editors.v9.1.Express.dll
Infragistics3.Wpf.v9.1.Express.dll
vssver2.scc
WPFToolkit
vssver2.scc
WPFToolkit.dll
GoalBook.Controls
CheckedList
vssver2.scc
Properties
vssver2.scc
vssver2.scc
GoalBook.Goals
GoalBook.Goals.csproj.user
Properties
vssver2.scc
Views
vssver2.scc
vssver2.scc
GoalBook.Infrastructure
Comparers
vssver2.scc
Constants
vssver2.scc
Controls
Converters
vssver2.scc
Enums
vssver2.scc
Events
vssver2.scc
GoalBook.Infrastructure.csproj.user
Helpers
vssver2.scc
Interfaces
vssver2.scc
ObjectModel
vssver2.scc
Printing
vssver2.scc
Properties
vssver2.scc
vssver2.scc
GoalBook.Notes
GoalBook.Notes.csproj.user
Properties
vssver2.scc
Resources
arrow_redo.png
arrow_undo.png
cut.png
page_copy.png
paste_plain.png
text_bold.png
text_indent.png
text_indent_remove.png
text_italic.png
text_list_bullets.png
text_list_numbers.png
vssver2.scc
world_link.png
Views
vssver2.scc
vssver2.scc
GoalBook.Public
Encryption
vssver2.scc
HtmlConverter
vssver2.scc
HtmlParser
vssver2.scc
Misc
vssver2.scc
Properties
vssver2.scc
vssver2.scc
GoalBook.Shell
App.ico
Commands
vssver2.scc
GoalBook.Shell.csproj.user
Journal.ico
Journal48.ico
Misc
vssver2.scc
Modules
vssver2.scc
Properties
licenses.licx
vssver2.scc
Resources
arrow_refresh.png
arrow_undo.png
checked.gif
cross.png
disk.png
email.png
erase.png
error.png
exclamation.png
flag_red.png
group.png
help.png
information.png
magnifier.png
page_red.png
pencil.png
printer.png
user.png
vssver2.scc
Wave.jpg
world.png
world_link.png
Services
vssver2.scc
Splash.png
Views
vssver2.scc
vssver2.scc
Windows
vssver2.scc
GoalBook.snk
GoalBook.Synchronisation
Events
vssver2.scc
Properties
vssver2.scc
ToodleDo
vssver2.scc
vssver2.scc
GoalBook.Tasks
Controls
vssver2.scc
Properties
vssver2.scc
Views
vssver2.scc
vssver2.scc
vssver2.scc
//===============================================================================
// Goal Book.
// Copyright © 2009 Mark Brownsword. 
//===============================================================================

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

namespace GoalBook.Infrastructure.ObjectModel
{
    /// <summary>
    /// Task Type.
    /// </summary>    
    [Serializable] public class Task : BusinessBase<Task>
    {        
        #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>
        private Task()
        {
            MarkAsChild();
        }

        /// <summary>
        /// Constructor. Use this constructor for new records.
        /// </summary>
        public Task(Guid taskID) : this()
        {
            LoadProperty(IdProperty, taskID);
            
            //Execute business rules against each property.
            ValidationRules.CheckRules();
        }

        /// <summary>
        /// Constructor. Use this constructor for new records created by GoalBook.
        /// </summary>        
        public Task(Guid taskID, int parentTask, int children, string title, string tag, Guid folderID, Guid contextID, Guid goalID,
            DateTime? added, DateTime? modified, DateTime? start, DateTime? due, string dueModifier, TimeInfo? dueTime, string startTime, DateTime? completed,
            int repeat, string repeatAdvanced, int status, bool star, int priority, int length, int timer, string note)
            : this()
        {
            LoadProperty(IdProperty, taskID);
            LoadProperty(ParentTaskProperty, parentTask);
            LoadProperty(ChildrenProperty, children);
            LoadProperty(TitleProperty, title);
            LoadProperty(TagProperty, tag);
            LoadProperty(FolderIdProperty, folderID);
            LoadProperty(ContextIdProperty, contextID);
            LoadProperty(GoalIdProperty, goalID);
            LoadProperty(AddedProperty, added);
            LoadProperty(ModifiedProperty, modified);
            LoadProperty(StartProperty, start);            
            LoadProperty(DueProperty, due);
            LoadProperty(DueModifierProperty, dueModifier);
            LoadProperty(DueTimeProperty, dueTime);
            LoadProperty(StartTimeProperty, startTime);
            LoadProperty(CompletedProperty, completed);
            LoadProperty(RepeatProperty, repeat);
            LoadProperty(RepeatAdvancedProperty, repeatAdvanced);
            LoadProperty(StatusProperty, status);
            LoadProperty(StarProperty, star);
            LoadProperty(PriorityProperty, priority);
            LoadProperty(LengthProperty, length);
            LoadProperty(TimerProperty, timer);
            LoadProperty(NoteProperty, note);
            
            //Execute business rules against each property.
            ValidationRules.CheckRules();
                        
            MarkOld();
        }
        /// <summary>
        /// Constructor. Use this constructor for new records created by Toodledo.
        /// </summary>        
        public Task(Guid taskID, int parentTask, int children, string title, string tag, Guid folderID, Guid contextID, Guid goalID,
            DateTime? added, DateTime? modified, DateTime? start, DateTime? due, string dueModifier, TimeInfo? dueTime, string startTime, DateTime? completed, 
            int repeat, string repeatAdvanced, int status, bool star, int priority, int length, int timer, string note, int externalIdentifier)
            : this()
        {
            LoadProperty(IdProperty, taskID);
            LoadProperty(ParentTaskProperty, parentTask);
            LoadProperty(ChildrenProperty, children);
            LoadProperty(TitleProperty, title);
            LoadProperty(TagProperty, tag);            
            LoadProperty(FolderIdProperty, folderID);
            LoadProperty(ContextIdProperty, contextID);
            LoadProperty(GoalIdProperty, goalID);
            LoadProperty(AddedProperty, added);
            LoadProperty(ModifiedProperty, modified);
            LoadProperty(StartProperty, start);            
            LoadProperty(DueProperty, due);
            LoadProperty(DueModifierProperty, dueModifier);
            LoadProperty(DueTimeProperty, dueTime);
            LoadProperty(StartTimeProperty, startTime);
            LoadProperty(CompletedProperty, completed);
            LoadProperty(RepeatProperty, repeat);
            LoadProperty(RepeatAdvancedProperty, repeatAdvanced);
            LoadProperty(StatusProperty, status);
            LoadProperty(StarProperty, star);
            LoadProperty(PriorityProperty, priority);
            LoadProperty(LengthProperty, length);
            LoadProperty(TimerProperty, timer);
            LoadProperty(NoteProperty, note);
            LoadProperty(ExternalIdentifierProperty, externalIdentifier);

            //Execute business rules against each property.
            ValidationRules.CheckRules();

            MarkOld();
        }
        #endregion

        #region Properties
        public static PropertyInfo<Guid> IdProperty = RegisterProperty(typeof(Task), new PropertyInfo<Guid>("TaskID"));
        public static PropertyInfo<int> ParentTaskProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("ParentTask"));
        public static PropertyInfo<int> ChildrenProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Children"));
        public static PropertyInfo<string> TitleProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("Title"));
        public static PropertyInfo<string> TagProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("Tag"));
        public static PropertyInfo<Guid> FolderIdProperty = RegisterProperty(typeof(Task), new PropertyInfo<Guid>("FolderID", "Folder"));
        public static PropertyInfo<Guid> ContextIdProperty = RegisterProperty(typeof(Task), new PropertyInfo<Guid>("ContextID", "Context"));
        public static PropertyInfo<Guid> GoalIdProperty = RegisterProperty(typeof(Task), new PropertyInfo<Guid>("GoalID", "Goal"));
        public static PropertyInfo<DateTime?> AddedProperty = RegisterProperty(typeof(Task), new PropertyInfo<DateTime?>("Added"));
        public static PropertyInfo<DateTime?> ModifiedProperty = RegisterProperty(typeof(Task), new PropertyInfo<DateTime?>("Modified"));
        public static PropertyInfo<DateTime?> StartProperty = RegisterProperty(typeof(Task), new PropertyInfo<DateTime?>("Start"));
        public static PropertyInfo<DateTime?> DueProperty = RegisterProperty(typeof(Task), new PropertyInfo<DateTime?>("Due"));
        public static PropertyInfo<string> DueModifierProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("DueModifier"));
        public static PropertyInfo<TimeInfo> DueTimeProperty = RegisterProperty(typeof(Task), new PropertyInfo<TimeInfo>("DueTime"));
        public static PropertyInfo<string> StartTimeProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("StartTime"));
        public static PropertyInfo<DateTime?> CompletedProperty = RegisterProperty(typeof(Task), new PropertyInfo<DateTime?>("Completed"));
        public static PropertyInfo<int> RepeatProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Repeat"));
        public static PropertyInfo<string> RepeatAdvancedProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("RepeatAdvanced"));
        public static PropertyInfo<int> StatusProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Status"));
        public static PropertyInfo<bool> StarProperty = RegisterProperty(typeof(Task), new PropertyInfo<bool>("Star"));
        public static PropertyInfo<int> PriorityProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Priority"));
        public static PropertyInfo<int> LengthProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Length"));
        public static PropertyInfo<int> TimerProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("Timer"));
        public static PropertyInfo<string> NoteProperty = RegisterProperty(typeof(Task), new PropertyInfo<string>("Note"));
        public static PropertyInfo<int> ExternalIdentifierProperty = RegisterProperty(typeof(Task), new PropertyInfo<int>("ExternalIdentifier"));

        /*
        <task>
		        <id>1234</id>
		        <parent>1122</parent>
		        <children>0</children>
		        <title>Buy Milk</title>
		        <tag>After work</tag>
		        <folder>123</folder>
		        <context id="123">Home</context>
		        <goal id="123">Get a Raise</goal>
		        <added>2006-01-23</added>
		        <modified>2006-01-25 05:12:45</modified>
		        <startdate></startdate>
		        <duedate modifier=""></duedate>
		        <duetime>2:00pm</duetime>
		        <starttime>1:00pm</starttime>
		        <completed></completed>
		        <repeat>1</repeat>
		        <rep_advanced></rep_advanced>
		        <status>4</status>
		        <star>0</star>
		        <priority>2</priority>
		        <length>20</length>
		        <timer onfor="0">0</timer>
		        <note></note>
	    </task>
         */

        /// <summary>
        /// Reference to TaskID field. This is the unique identifier for the Task.
        /// </summary>        
        public Guid TaskID
        {
            get 
            { 
                CanReadProperty(IdProperty.Name, true); 
                return GetProperty(IdProperty); 
            }
            set
            {
                CanWriteProperty(IdProperty.Name, true);
                if (!GetProperty(IdProperty).Equals(value))
                {
                    SetProperty(IdProperty, value);
                    PropertyHasChanged(IdProperty.Name);
                }
            }            
        }  
        
        /// <summary>
        /// Reference to ParentTask.
        /// </summary>        
        public int ParentTask
        {
            get
            {
                CanReadProperty(ParentTaskProperty.Name, true);
                return GetProperty(ParentTaskProperty);
            }
            set
            {
                CanWriteProperty(ParentTaskProperty.Name, true);
                if (!GetProperty(ParentTaskProperty).Equals(value))
                {
                    SetProperty(ParentTaskProperty, value);
                    PropertyHasChanged(ParentTaskProperty.Name);
                }
            }
        }        
        
        /// <summary>
        /// Reference to Children.
        /// </summary>        
        public int Children 
        {
            get
            {
                CanReadProperty(ChildrenProperty.Name, true);
                return GetProperty(ChildrenProperty);
            }
            set
            {
                CanWriteProperty(ChildrenProperty.Name, true);
                if (!GetProperty(ChildrenProperty).Equals(value))
                {
                    SetProperty(ChildrenProperty, value);
                    PropertyHasChanged(ChildrenProperty.Name);
                }
            }
        }
                
        /// <summary>
        /// Reference to Title field.
        /// </summary>
        public string Title
        {
            get
            {
                CanReadProperty(TitleProperty.Name, true);
                return GetProperty(TitleProperty);
            }
            set 
            {
                CanWriteProperty(TitleProperty.Name, true);
                if (!GetProperty(TitleProperty).Equals(value))
                {
                    SetProperty(TitleProperty, value);
                    PropertyHasChanged(TitleProperty.Name);                    
                }
            }
        }
        
        /// <summary>
        /// Reference to Tag field.
        /// </summary>
        public string Tag
        {
            get
            {
                CanReadProperty(TagProperty.Name, true);
                return GetProperty(TagProperty);
            }
            set 
            {
                CanWriteProperty(TagProperty.Name, true);
                if (!GetProperty(TagProperty).Equals(value))
                {
                    SetProperty(TagProperty, value);
                    PropertyHasChanged(TagProperty.Name);                    
                }
            }
        }  
                
        /// <summary>
        /// Reference to FolderID field.
        /// </summary>        
        public Guid FolderID
        {
            get
            {
                CanReadProperty(FolderIdProperty.Name, true);
                return GetProperty(FolderIdProperty);
            }
            set
            {
                CanWriteProperty(FolderIdProperty.Name, true);
                if (!GetProperty(FolderIdProperty).Equals(value))
                {
                    SetProperty(FolderIdProperty, value);
                    PropertyHasChanged(FolderIdProperty.Name);
                }
            }
        }
        
        /// <summary>
        /// Reference to ContextID field.
        /// </summary>        
        public Guid ContextID
        {
            get
            {
                CanReadProperty(ContextIdProperty.Name, true);
                return GetProperty(ContextIdProperty);
            }
            set
            {
                CanWriteProperty(ContextIdProperty.Name, true);
                if (!GetProperty(ContextIdProperty).Equals(value))
                {
                    SetProperty(ContextIdProperty, value);
                    PropertyHasChanged(ContextIdProperty.Name);
                }
            }
        }
        
        /// <summary>
        /// Reference to GoalID field.
        /// </summary>        
        public Guid GoalID
        {
            get
            {
                CanReadProperty(GoalIdProperty.Name, true);
                return GetProperty(GoalIdProperty);
            }
            set
            {
                CanWriteProperty(GoalIdProperty.Name, true);
                if (!GetProperty(GoalIdProperty).Equals(value))
                {
                    SetProperty(GoalIdProperty, value);
                    PropertyHasChanged(GoalIdProperty.Name);
                }
            }
        }
             

        /// <summary>
        /// Reference to Added field.
        /// </summary>        
        public DateTime? Added
        {
            get
            {
                CanReadProperty(AddedProperty.Name, true);
                return GetProperty(AddedProperty);
            }
            set
            {
                CanWriteProperty(AddedProperty.Name, true);
                if (!GetProperty(AddedProperty).Equals(value))
                {
                    SetProperty(AddedProperty, value);
                    PropertyHasChanged(AddedProperty.Name);
                }
            }            
        }

        /// <summary>
        /// Reference to Modified field.
        /// </summary>        
        public DateTime? Modified
        {
            get
            {
                CanReadProperty(ModifiedProperty.Name, true);
                return GetProperty(ModifiedProperty);
            }
            set
            {
                CanWriteProperty(ModifiedProperty.Name, true);
                if (!GetProperty(ModifiedProperty).Equals(value))
                {
                    SetProperty(ModifiedProperty, value);
                    PropertyHasChanged(ModifiedProperty.Name);
                }
            }            
        }
                
        /// <summary>
        /// Reference to Start field.
        /// </summary>        
        public DateTime? Start
        {
            get
            {
                CanReadProperty(StartProperty.Name, true);
                return GetProperty(StartProperty);
            }
            set
            {
                CanWriteProperty(StartProperty.Name, true);
                if (!GetProperty(StartProperty).Equals(value))
                {
                    SetProperty(StartProperty, value);
                    PropertyHasChanged(StartProperty.Name);
                }
            }            
        }
        
        /// <summary>
        /// Reference to Due field.
        /// </summary>        
        public DateTime? Due
        {
            get
            {
                CanReadProperty(DueProperty.Name, true);
                return GetProperty(DueProperty);
            }
            set
            {
                CanWriteProperty(DueProperty.Name, true);
                if (!GetProperty(DueProperty).Equals(value))
                {
                    SetProperty(DueProperty, value);
                    PropertyHasChanged(DueProperty.Name);
                }
            }            
        }
                
        /// <summary>
        /// Reference to DueTime field.
        /// </summary>
        public TimeInfo? DueTime
        {
            get
            {
                CanReadProperty(DueTimeProperty.Name, true);
                return GetProperty(DueTimeProperty);
            }
            set 
            {
                CanWriteProperty(DueTimeProperty.Name, true);
                if (!GetProperty(DueTimeProperty).Equals(value))
                {
                    SetProperty(DueTimeProperty, value);
                    PropertyHasChanged(DueTimeProperty.Name);                    
                }
            }
        }

        /// <summary>
        /// Reference to DueModifier field.
        /// </summary>
        public string DueModifier
        {
            get
            {
                CanReadProperty(DueModifierProperty.Name, true);
                return GetProperty(DueModifierProperty);
            }
            set
            {
                CanWriteProperty(DueModifierProperty.Name, true);
                if (!GetProperty(DueModifierProperty).Equals(value))
                {
                    SetProperty(DueModifierProperty, value);
                    PropertyHasChanged(DueModifierProperty.Name);
                }
            }
        } 
        
        /// <summary>
        /// Reference to StartTime field.
        /// </summary>
        public string StartTime
        {
            get
            {
                CanReadProperty(StartTimeProperty.Name, true);
                return GetProperty(StartTimeProperty);
            }
            set 
            {
                CanWriteProperty(StartTimeProperty.Name, true);
                if (!GetProperty(StartTimeProperty).Equals(value))
                {
                    SetProperty(StartTimeProperty, value);
                    PropertyHasChanged(StartTimeProperty.Name);                    
                }
            }
        } 
        
        /// <summary>
        /// Reference to Completed field.
        /// </summary>        
        public DateTime? Completed
        {
            get
            {
                CanReadProperty(CompletedProperty.Name, true);
                return GetProperty(CompletedProperty);
            }
            set
            {
                CanWriteProperty(CompletedProperty.Name, true);
                if (!GetProperty(CompletedProperty).Equals(value))
                {
                    SetProperty(CompletedProperty, value);
                    PropertyHasChanged(CompletedProperty.Name);
                }
            }            
        }
        
        /// <summary>
        /// Reference to Repeat field.
        /// </summary>        
        public int Repeat
        {
            get
            {
                CanReadProperty(RepeatProperty.Name, true);
                return GetProperty(RepeatProperty);
            }
            set
            {
                CanWriteProperty(RepeatProperty.Name, true);
                if (!GetProperty(RepeatProperty).Equals(value))
                {
                    SetProperty(RepeatProperty, value);
                    PropertyHasChanged(RepeatProperty.Name);
                }
            }            
        }
        
        /// <summary>
        /// Reference to RepeatAdvanced field.
        /// </summary>
        public string RepeatAdvanced
        {
            get
            {
                CanReadProperty(RepeatAdvancedProperty.Name, true);
                return GetProperty(RepeatAdvancedProperty);
            }
            set 
            {
                CanWriteProperty(RepeatAdvancedProperty.Name, true);
                if (!GetProperty(RepeatAdvancedProperty).Equals(value))
                {
                    SetProperty(RepeatAdvancedProperty, value);
                    PropertyHasChanged(RepeatAdvancedProperty.Name);                    
                }
            }
        } 
        
        /// <summary>
        /// Reference to Status.
        /// </summary>        
        public int Status 
        {
            get
            {
                CanReadProperty(StatusProperty.Name, true);
                return GetProperty(StatusProperty);
            }
            set
            {
                CanWriteProperty(StatusProperty.Name, true);
                if (!GetProperty(StatusProperty).Equals(value))
                {
                    SetProperty(StatusProperty, value);
                    PropertyHasChanged(StatusProperty.Name);
                }
            }
        }
        
        /// <summary>
        /// Reference to Star field.
        /// </summary>        
        public bool Star
        {
            get
            {
                CanReadProperty(StarProperty.Name, true);
                return GetProperty(StarProperty);
            }
            set
            {
                CanWriteProperty(StarProperty.Name, true);
                if (!GetProperty(StarProperty).Equals(value))
                {
                    SetProperty(StarProperty, value);
                    PropertyHasChanged(StarProperty.Name);
                }
            }            
        }
        
        /// <summary>
        /// Reference to Priority.
        /// </summary>        
        public int Priority 
        {
            get
            {
                CanReadProperty(PriorityProperty.Name, true);
                return GetProperty(PriorityProperty);
            }
            set
            {
                CanWriteProperty(PriorityProperty.Name, true);
                if (!GetProperty(PriorityProperty).Equals(value))
                {
                    SetProperty(PriorityProperty, value);
                    PropertyHasChanged(PriorityProperty.Name);
                }
            }
        } 
        
        /// <summary>
        /// Reference to Length.
        /// </summary>        
        public int Length 
        {
            get
            {
                CanReadProperty(LengthProperty.Name, true);
                return GetProperty(LengthProperty);
            }
            set
            {
                CanWriteProperty(LengthProperty.Name, true);
                if (!GetProperty(LengthProperty).Equals(value))
                {
                    SetProperty(LengthProperty, value);
                    PropertyHasChanged(LengthProperty.Name);
                }
            }
        } 
        
        /// <summary>
        /// Reference to Timer.
        /// </summary>        
        public int Timer 
        {
            get
            {
                CanReadProperty(TimerProperty.Name, true);
                return GetProperty(TimerProperty);
            }
            set
            {
                CanWriteProperty(TimerProperty.Name, true);
                if (!GetProperty(TimerProperty).Equals(value))
                {
                    SetProperty(TimerProperty, value);
                    PropertyHasChanged(TimerProperty.Name);
                }
            }
        }
        
        /// <summary>
        /// Reference to Note field.
        /// </summary>
        public string Note
        {
            get
            {
                CanReadProperty(NoteProperty.Name, true);
                return GetProperty(NoteProperty);
            }
            set 
            {
                CanWriteProperty(NoteProperty.Name, true);
                if (!GetProperty(NoteProperty).Equals(value))
                {
                    SetProperty(NoteProperty, value);
                    PropertyHasChanged(NoteProperty.Name);                    
                }
            }
        } 

        /// <summary>
        /// Reference to ExternalIdentifier.
        /// </summary>        
        public int ExternalIdentifier 
        {
            get
            {
                CanReadProperty(ExternalIdentifierProperty.Name, true);
                return GetProperty(ExternalIdentifierProperty);
            }
            set
            {
                CanWriteProperty(ExternalIdentifierProperty.Name, true);
                if (!GetProperty(ExternalIdentifierProperty).Equals(value))
                {
                    SetProperty(ExternalIdentifierProperty, value);
                    PropertyHasChanged(ExternalIdentifierProperty.Name);
                }
            }
        } 
       
        /// <summary>
        /// Reference to SyncRequired (client -> server).
        /// </summary>        
        public bool SyncRequired { get; set; }        
        #endregion

        #region Private and Protected Methods
        #endregion

        #region Public and internal Methods

        #region External
        /// <summary>
        /// Serialize As XElement.
        /// </summary>        
        public XElement SerializeAsXElement()
        {
            XElement taskElement = new XElement(Constants.TaskSerializationConstants.SERIALIZATION_TASK,
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_TASKID, this.TaskID),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_PARENTTASK, this.ParentTask),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_CHILDREN, this.Children),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_TITLE, this.Title),                                               
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_TAG, this.Tag),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_FOLDERID, this.FolderID),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_CONTEXTID, this.ContextID),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_GOALID, this.GoalID),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_ADDED, this.Added.HasValue ? this.Added.Value.ToString() : string.Empty),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_MODIFIED, this.Modified.HasValue ? this.Modified.Value.ToString() : string.Empty),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_START, this.Start.HasValue ? this.Start.Value.ToString() : string.Empty),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_DUE, this.Due.HasValue ? this.Due.Value.ToString() : string.Empty),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_DUEMODIFIER, this.DueModifier),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_DUETIME, this.DueTime.ToString()),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_STARTTIME, this.StartTime),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_COMPLETED, this.Completed.HasValue ? this.Completed.Value.ToString() : string.Empty),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_REPEAT, this.Repeat),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_REPEATADVANCED, this.RepeatAdvanced),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_STATUS, this.Status),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_STAR, this.Star),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_PRIORITY, this.Priority),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_LENGTH, this.Length),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_TIMER, this.Timer),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_NOTE, this.Note),
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_EXTERNALIDENTIFIER, this.ExternalIdentifier), //?
                new XAttribute(Constants.TaskSerializationConstants.SERIALIZATION_SYNCREQUIRED, this.SyncRequired));

            return taskElement;
        }

        /// <summary>
        /// Marks the Task as Old.
        /// </summary>        
        public Task MarkTaskOld()
        {
            if (base.IsDirty) { base.MarkOld(); }
            return this;
        }

        /// <summary>
        /// Reference to EditLevel.
        /// </summary>
        public int GetEditLevel()
        {
            return base.EditLevel;
        }

        /// <summary>
        /// MapFields. 
        /// </summary>        
        public void MapFields(Task task)
        {
            this.ParentTask = task.ParentTask;
            this.Children = task.Children;
            this.Title = task.Title;
            this.Tag = task.Tag;
            this.FolderID = task.FolderID;
            this.ContextID = task.ContextID;
            this.GoalID = task.GoalID;
            this.Added = task.Added;
            this.Modified = task.Modified;
            this.Start = task.Start;
            this.Due = task.Due;
            this.DueModifier = task.DueModifier;
            this.DueTime = task.DueTime;
            this.StartTime = task.StartTime;
            this.Completed = task.Completed;
            this.Repeat = task.Repeat;
            this.RepeatAdvanced = task.RepeatAdvanced;
            this.Status = task.Status;
            this.Star = task.Star;
            this.Priority = task.Priority;
            this.Length = task.Length;
            this.Timer = task.Timer;
            this.Note = task.Note;
            this.ExternalIdentifier = task.ExternalIdentifier;
                                                                                                      
            ValidationRules.CheckRules();
        }
        #endregion

        #region Validation Handlers
        /// <summary>
        /// Validate NoteID is not empty Guid. 
        /// Called by BusinessBase RulesEngine.
        /// </summary>        
        public static bool IdValidator<T>(T target, RuleArgs e) where T : Task
        {
            if (target.TaskID == Guid.Empty) 
            {
                e.Description = Resources.ValidationIDMessage;
                return false; 
            }

            return true;
        }

        /// <summary>
        /// DueTime Validator.
        /// </summary>        
        public static bool DueTimeValidator<T>(T target, RuleArgs e) where T : Task
        {
            if (target.DueTime.HasValue)
            {
                if (string.IsNullOrEmpty(target.DueTime.Value.Hour) &&
                    string.IsNullOrEmpty(target.DueTime.Value.Minute) &&
                    target.DueTime.Value.Format == null)
                {
                    return true; // All fields are null.
                }
                else if (string.IsNullOrEmpty(target.DueTime.Value.Hour) ||
                    string.IsNullOrEmpty(target.DueTime.Value.Minute) ||
                    target.DueTime.Value.Format == null)
                {
                    e.Description = Resources.ValidationTimeMessage;
                    return false; // Some fields are null.
                }
            }

            return true;
        }
        #endregion
        
        #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>
        /// OnPropertyChanged. Override to record LastModified.
        /// </summary>        
        protected override void OnPropertyChanged(string propertyName)
        {
            base.OnPropertyChanged(propertyName);

            //Set SyncRequired when propertyName has a value
            //(value is empty when Note is marked clean).
            if (!string.IsNullOrEmpty(propertyName))
            {                          
                SyncRequired = true;                
            }
        }

        /// <summary>
        /// Add Business Rules. Defines basic validation rules to execute against specified fields.         
        /// </summary>
        protected override void AddBusinessRules()
        {
            // Id - Validate value is Guid.
            ValidationRules.AddRule<Task>(IdValidator, IdProperty);  
                        
            // Title
            ValidationRules.AddRule(CommonRules.StringRequired, TitleProperty);
            ValidationRules.AddRule(CommonRules.StringMaxLength, new CommonRules.MaxLengthRuleArgs(TitleProperty, 255));

            // DueTime
            ValidationRules.AddRule<Task>(DueTimeValidator, DueTimeProperty);

            /*
                <id>1234</id>
                ?<parent>1122</parent>
                ?<children>0</children>
                <title>Buy Milk</title>
                ?<tag>After work</tag>
                ?<folder>123</folder>
                ?<context id="123">Home</context>
                ?<goal id="123">Get a Raise</goal>
                ?<added>2006-01-23</added>
                ?<modified>2006-01-25 05:12:45</modified>
                ?<startdate></startdate>
                ?<duedate modifier=""></duedate>
                <duetime>2:00pm</duetime>
                <starttime>1:00pm</starttime>
                ?<completed></completed>
                ?<repeat>1</repeat>
                ?<rep_advanced></rep_advanced>
                ?<status>4</status>
                ?<star>0</star>
                ?<priority>2</priority>
                ?<length>20</length>
                ?<timer onfor="0">0</timer>
                ?<note></note>
           */
        }

        /// <summary>
        /// Override for GetIdValue.
        /// </summary>        
        protected override object GetIdValue()
        {
            return GetProperty(IdProperty);
        }
        
        /// <summary>
        /// Override for ToString.
        /// </summary>        
        public override string ToString()
        {
            return GetProperty(TitleProperty).ToString();
        }
        #endregion
    }
}

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About the Author

Mark Brownsword
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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