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using System;
using System.Collections.Generic;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements SIP "Retry-After" value. Defined in rfc 3261.
/// Retry after specifies how many seconds the service is expected to be unavailable to the requesting client.
/// </summary>
/// <remarks>
/// <code>
/// RFC 3261 Syntax:
/// Retry-After = delta-seconds [ comment ] *( SEMI retry-param )
/// retry-param = ("duration" EQUAL delta-seconds) / generic-param
/// </code>
/// </remarks>
public class SIP_t_RetryAfter : SIP_t_ValueWithParams
{
private int m_Time = 0;
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="value">SIP Retry-After value.</param>
public SIP_t_RetryAfter(string value)
{
Parse(value);
}
#region method Parse
/// <summary>
/// Parses "Retry-After" from specified value.
/// </summary>
/// <param name="value">SIP "Retry-After" 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 "Retry-After" 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)
{
/*
Retry-After = delta-seconds [ comment ] *( SEMI retry-param )
retry-param = ("duration" EQUAL delta-seconds) / generic-param
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
// delta-seconds
string word = reader.ReadWord();
if(word == null){
throw new SIP_ParseException("SIP Retry-After 'delta-seconds' value is missing !");
}
try{
m_Time = Convert.ToInt32(word);
}
catch{
throw new SIP_ParseException("Invalid SIP Retry-After 'delta-seconds' value !");
}
// Parse parameters
ParseParameters(reader);
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts this to valid "Retry-After" value.
/// </summary>
/// <returns>Returns "Retry-After" value.</returns>
public override string ToStringValue()
{
/*
Retry-After = delta-seconds [ comment ] *( SEMI retry-param )
retry-param = ("duration" EQUAL delta-seconds) / generic-param
*/
StringBuilder retVal = new StringBuilder();
// delta-seconds
retVal.Append(m_Time);
// Add parameters
retVal.Append(ParametersToString());
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets how many seconds the service is expected to be unavailable to the requesting client.
/// </summary>
/// <exception cref="ArgumentException">Is raised when when value less than 1 is passed.</exception>
public int Time
{
get{ return m_Time; }
set{
if(value < 1){
throw new ArgumentException("Property Time value must be >= 1 !");
}
m_Time = value;
}
}
/// <summary>
/// Gets or sets 'duration' parameter value. The 'duration' parameter indicates how long the
/// called party will be reachable starting at the initial time of availability. If no duration
/// parameter is given, the service is assumed to be available indefinitely. Value -1 means not specified.
/// </summary>
/// <exception cref="ArgumentException">Is raised when when value less than 1 is passed.</exception>
public int Duration
{
get{
SIP_Parameter parameter = this.Parameters["duration"];
if(parameter != null){
return Convert.ToInt32(parameter.Value);
}
else{
return -1;
}
}
set{
if(value == -1){
this.Parameters.Remove("duration");
}
else{
if(value < 1){
throw new ArgumentException("Property Duration value must be >= 1 !");
}
this.Parameters.Set("duration",value.ToString());
}
}
}
#endregion
}
}
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