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using System;
using System.Collections.Generic;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements SIP "language" value. Defined in RFC 3261.
/// </summary>
/// <remarks>
/// <code>
/// RFC 3261 Syntax:
/// language = language-range *(SEMI accept-param)
/// language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) / "*" )
/// accept-param = ("q" EQUAL qvalue) / generic-param
/// </code>
/// </remarks>
public class SIP_t_Language : SIP_t_ValueWithParams
{
private string m_LanguageRange = "";
/// <summary>
/// Default constructor.
/// </summary>
public SIP_t_Language()
{
}
#region method Parse
/// <summary>
/// Parses "language" from specified value.
/// </summary>
/// <param name="value">SIP "language" 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 "language" 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)
{
/*
language = language-range *(SEMI accept-param)
language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) / "*" )
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
// Parse content-coding
string word = reader.ReadWord();
if(word == null){
throw new SIP_ParseException("Invalid Accept-Language value, language-range value is missing !");
}
m_LanguageRange = word;
// Parse parameters
ParseParameters(reader);
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts this to valid "language" value.
/// </summary>
/// <returns>Restuns "language" value.</returns>
public override string ToStringValue()
{
/*
Accept-Language = "Accept-Language" HCOLON [ language *(COMMA language) ]
language = language-range *(SEMI accept-param)
language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) / "*" )
*/
StringBuilder retVal = new StringBuilder();
retVal.Append(m_LanguageRange);
retVal.Append(ParametersToString());
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets language range. Value *(STAR) means all languages.
/// </summary>
public string LanguageRange
{
get{ return m_LanguageRange; }
set{
if(string.IsNullOrEmpty(value)){
throw new ArgumentException("Property LanguageRange value can't be null or empty !");
}
m_LanguageRange = value;
}
}
/// <summary>
/// Gets or sets qvalue parameter. Targets are processed from highest qvalue to lowest.
/// This value must be between 0.0 and 1.0. Value -1 means that value not specified.
/// </summary>
public double QValue
{
get{
SIP_Parameter parameter = this.Parameters["qvalue"];
if(parameter != null){
return Convert.ToDouble(parameter.Value);
}
else{
return -1;
}
}
set{
if(value < 0 || value > 1){
throw new ArgumentException("Property QValue value must be between 0.0 and 1.0 !");
}
if(value < 0){
this.Parameters.Remove("qvalue");
}
else{
this.Parameters.Set("qvalue",value.ToString());
}
}
}
#endregion
}
}
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