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using System;
using System.Collections.Generic;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements SIP "reason-value" value. Defined in rfc 3326.
/// </summary>
/// <remarks>
/// <code>
/// RFC 3326 Syntax:
/// reason-value = protocol *(SEMI reason-params)
/// protocol = "SIP" / "Q.850" / token
/// reason-params = protocol-cause / reason-text / reason-extension
/// protocol-cause = "cause" EQUAL cause
/// cause = 1*DIGIT
/// reason-text = "text" EQUAL quoted-string
/// reason-extension = generic-param
/// </code>
/// </remarks>
public class SIP_t_ReasonValue : SIP_t_ValueWithParams
{
private string m_Protocol = "";
/// <summary>
/// Default constructor.
/// </summary>
public SIP_t_ReasonValue()
{
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="value">SIP reason-value value.</param>
public SIP_t_ReasonValue(string value)
{
Parse(value);
}
#region method Parse
/// <summary>
/// Parses "reason-value" from specified value.
/// </summary>
/// <param name="value">SIP "reason-value" value.</param>
/// <exception cref="ArgumentNullException">Raised when <b>value</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("value");
}
Parse(new StringReader(value));
}
/// <summary>
/// Parses "reason-value" 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)
{
/*
reason-value = protocol *(SEMI reason-params)
protocol = "SIP" / "Q.850" / token
reason-params = protocol-cause / reason-text / reason-extension
protocol-cause = "cause" EQUAL cause
cause = 1*DIGIT
reason-text = "text" EQUAL quoted-string
reason-extension = generic-param
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
// protocol
string word = reader.ReadWord();
if(word == null){
throw new SIP_ParseException("SIP reason-value 'protocol' value is missing !");
}
m_Protocol = word;
// Parse parameters
ParseParameters(reader);
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts this to valid "reason-value" value.
/// </summary>
/// <returns>Returns "reason-value" value.</returns>
public override string ToStringValue()
{
/*
reason-value = protocol *(SEMI reason-params)
protocol = "SIP" / "Q.850" / token
reason-params = protocol-cause / reason-text / reason-extension
protocol-cause = "cause" EQUAL cause
cause = 1*DIGIT
reason-text = "text" EQUAL quoted-string
reason-extension = generic-param
*/
StringBuilder retVal = new StringBuilder();
// Add protocol
retVal.Append(m_Protocol);
// Add parameters
retVal.Append(ParametersToString());
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets protocol.
/// </summary>
/// <exception cref="ArgumentNullException">Is raised when null value is passed.</exception>
public string Protocol
{
get{ return m_Protocol; }
set{
if(value == null){
throw new ArgumentNullException("Protocol");
}
m_Protocol = value;
}
}
/// <summary>
/// Gets or sets 'cause' parameter value. The cause parameter contains a SIP status code.
/// Value -1 means not specified.
/// </summary>
public int Cause
{
get{
if(this.Parameters["cause"] == null){
return -1;
}
else{
return Convert.ToInt32(this.Parameters["cause"].Value);
}
}
set{
if(value < 0){
this.Parameters.Remove("cause");
}
else{
this.Parameters.Set("cause",value.ToString());
}
}
}
/// <summary>
/// Gets or sets 'text' parameter value. Value null means not specified.
/// </summary>
public string Text
{
get{
SIP_Parameter parameter = this.Parameters["text"];
if(parameter != null){
return parameter.Value;
}
else{
return null;
}
}
set{
if(value == null){
this.Parameters.Remove("text");
}
else{
this.Parameters.Set("text",value);
}
}
}
#endregion
}
}
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