using System;
using System.Xml;

namespace Server.Accounting
{
	public class AccountComment
	{
		private readonly string m_AddedBy;
		private string m_Content;
		private DateTime m_LastModified;

		/// <summary>
		/// A string representing who added this comment.
		/// </summary>
		public string AddedBy
		{
			get{ return m_AddedBy; }
		}

		/// <summary>
		/// Gets or sets the body of this comment. Setting this value will reset LastModified.
		/// </summary>
		public string Content
		{
			get{ return m_Content; }
			set{ m_Content = value; m_LastModified = DateTime.Now; }
		}

		/// <summary>
		/// The date and time when this account was last modified -or- the comment creation time, if never modified.
		/// </summary>
		public DateTime LastModified
		{
			get{ return m_LastModified; }
		}

		/// <summary>
		/// Constructs a new AccountComment instance.
		/// </summary>
		/// <param name="addedBy">Initial AddedBy value.</param>
		/// <param name="content">Initial Content value.</param>
		public AccountComment( string addedBy, string content )
		{
			m_AddedBy = addedBy;
			m_Content = content;
			m_LastModified = DateTime.Now;
		}

		/// <summary>
		/// Deserializes an AccountComment instance from an xml element.
		/// </summary>
		/// <param name="node">The XmlElement instance from which to deserialize.</param>
		public AccountComment( XmlElement node )
		{
			m_AddedBy = Utility.GetAttribute( node, "addedBy", "empty" );
            m_LastModified = Utility.GetXMLDateTime(Utility.GetAttribute(node, "lastModified"), DateTime.Now);
            m_Content = Utility.GetText(node, "");
		}

		/// <summary>
		/// Serializes this AccountComment instance to an XmlTextWriter.
		/// </summary>
		/// <param name="xml">The XmlTextWriter instance from which to serialize.</param>
		public void Save( XmlTextWriter xml )
		{
			xml.WriteStartElement( "comment" );

			xml.WriteAttributeString( "addedBy", m_AddedBy );

			xml.WriteAttributeString( "lastModified", XmlConvert.ToString( m_LastModified, XmlDateTimeSerializationMode.Local ) );

			xml.WriteString( m_Content );

			xml.WriteEndElement();
		}
	}
}