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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements SIP "To" value. Defined in RFC 3261.
/// The To header field specifies the logical recipient of the request.
/// </summary>
/// <remarks>
/// <code>
/// RFC 3261 Syntax:
/// To = ( name-addr / addr-spec ) *( SEMI to-param )
/// to-param = tag-param / generic-param
/// tag-param = "tag" EQUAL token
/// </code>
/// </remarks>
public class SIP_t_To : SIP_t_ValueWithParams
{
private SIP_t_NameAddress m_pAddress = null;
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="value">To: header field value.</param>
public SIP_t_To(string value)
{
m_pAddress = new SIP_t_NameAddress();
Parse(new StringReader(value));
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="address">To address.</param>
public SIP_t_To(SIP_t_NameAddress address)
{
m_pAddress = address;
}
#region method Parse
/// <summary>
/// Parses "To" from specified value.
/// </summary>
/// <param name="value">SIP "To" value.</param>
/// <exception cref="ArgumentNullException">Raised when <b>reader</b> is null.</exception>
/// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
public void Parse(string value)
{
if(value == null){
throw new ArgumentNullException("reader");
}
Parse(new StringReader(value));
}
/// <summary>
/// Parses "To" from specified reader.
/// </summary>
/// <param name="reader">Reader from where to parse.</param>
/// <exception cref="ArgumentNullException">Raised when <b>reader</b> is null.</exception>
/// <exception cref="SIP_ParseException">Raised when invalid SIP message.</exception>
public override void Parse(StringReader reader)
{
/* To = ( name-addr / addr-spec ) *( SEMI to-param )
to-param = tag-param / generic-param
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
// Parse address
m_pAddress.Parse(reader);
// Parse parameters
ParseParameters(reader);
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts this to valid "To" value.
/// </summary>
/// <returns>Returns "To" value.</returns>
public override string ToStringValue()
{
StringBuilder retVal = new StringBuilder();
retVal.Append(m_pAddress.ToStringValue());
retVal.Append(ParametersToString());
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets to address.
/// </summary>
public SIP_t_NameAddress Address
{
get{ return m_pAddress; }
}
/// <summary>
/// Gets or sets tag parameter value.
/// The "tag" parameter serves as a general mechanism for dialog identification.
/// Value null means that branch paramter doesn't exist.
/// </summary>
public string ToTag
{
get{
SIP_Parameter parameter = this.Parameters["tag"];
if(parameter != null){
return parameter.Value;
}
else{
return null;
}
}
set{
if(string.IsNullOrEmpty(value)){
this.Parameters.Remove("tag");
}
else{
this.Parameters.Set("tag",value);
}
}
}
#endregion
}
}
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