Transaction.cs

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Data.Linq.Mapping;
using System.ComponentModel;
using Microsoft.Practices.Prism.ViewModel;
using System.Xml.Serialization;
using System.IO;
using Bick.Budget.Data.ValueTypes;
using System.Data.Linq;
using System.Collections;

namespace Bick.Budget.Data.Transactions
{
    /// <summary>
    /// Describes financial transaction
    /// </summary>
    [Table(Name = "Transactions")]
    public class Transaction : NotificationObject
    {
        #region Fields
        /// <summary>
        /// Unique ID for transaction
        /// </summary>
        private Guid id;

        /// <summary>
        /// Unique ID for category
        /// </summary>
        private Guid? categoryID;

        /// <summary>
        /// Transaction's name
        /// </summary>
        private string name;

        /// <summary>
        /// Transaction's description
        /// </summary>
        private string description;

        /// <summary>
        /// Amount of transaction
        /// </summary>
        private double amount;

        /// <summary>
        /// Transaction added date
        /// </summary>
        private DateTime dateAdded;

        /// <summary>
        /// Parent category object
        /// </summary>
        private EntityRef<Categories.Category> category;
        #endregion

        #region Constructors
        /// <summary>
        /// Constructor for Transaction object
        /// </summary>
        public Transaction()
        {
            this.ID = Guid.NewGuid();
            this.DateAdded = DateTime.Now;
        }
        #endregion

        #region Properties
        #region Columns
        /// <summary>
        /// Gets transaction unique ID
        /// </summary>
        [Column(IsPrimaryKey = true)]
        public Guid ID
        {
            get
            {
                return this.id;
            }

            private set
            {
                if (this.id != value)
                {
                    this.id = value;
                    this.RaisePropertyChanged(() => this.ID);
                }
            }
        }

        /// <summary>
        /// Gets transaction parent category ID
        /// </summary>
        [Column(CanBeNull = true)]
        public Guid? CategoryID
        {
            get
            {
                return this.categoryID;
            }

            private set
            {
                if (this.categoryID != value)
                {
                    this.categoryID = value;
                    this.RaisePropertyChanged(() => this.CategoryID);
                }
            }

        }

        /// <summary>
        /// Gets or sets transaction name
        /// </summary>
        [Column]
        public string Name
        {
            get
            {
                return this.name;
            }

            set
            {
                if (this.name != value)
                {
                    this.name = value;
                    this.RaisePropertyChanged(() => this.Name);
                }
            }
        }

        /// <summary>
        /// Gets or sets amount of transaction
        /// </summary>
        [Column]
        [DefaultValue(0)]
        public double Amount
        {
            get
            {
                return this.amount;
            }

            set
            {
                if (this.amount != value)
                {
                    this.amount = value;
                    this.RaisePropertyChanged(() => this.Amount);
                }
            }
        }

        /// <summary>
        /// Gets transaction added date
        /// </summary>
        [Column]
        public DateTime DateAdded
        {
            get
            {
                return this.dateAdded;
            }

            private set
            {
                if (this.dateAdded != value)
                {
                    this.dateAdded = value;
                    this.RaisePropertyChanged(() => this.DateAdded);
                }
            }
        }
        #endregion

        #region Objects
        /// <summary>
        /// Gets or sets parent <see cref="Category"/> object
        /// </summary>
        [Association(Name = "FK_Transactions_Category", Storage = "category", ThisKey = "CategoryID", IsForeignKey = true)]
        public Categories.Category Category
        {
            get
            {
                return this.category.Entity;
            }

            set
            {
                Categories.Category previousValue = this.category.Entity;
                if (((previousValue != value) || (this.category.HasLoadedOrAssignedValue == false)))
                {
                    if ((previousValue != null))
                    {
                        this.category.Entity = null;
                        previousValue.Transactions.Remove(this);
                    }

                    this.category.Entity = value;
                    if ((value != null))
                    {
                        if ((value.AddedTransactions == null) || (!value.AddedTransactions.Contains(this)))
                        {
                            value.Transactions.Add(this);
                        }

                        this.CategoryID = value.ID;
                    }
                    else
                    {
                        this.category = new EntityRef<Categories.Category>();
                    }
                }
            }
        }
        #endregion
        #endregion
    }
}