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using System;
using System.Collections.Generic;
using System.Text;
namespace LumiSoft.Net.SIP.Message
{
/// <summary>
/// Implements "encoding" value. Defined in RFC 3261.
/// </summary>
/// <remarks>
/// <code>
/// RFC 3261 Syntax:
/// encoding = codings *(SEMI accept-param)
/// codings = content-coding / "*"
/// content-coding = token
/// accept-param = ("q" EQUAL qvalue) / generic-param
/// </code>
/// </remarks>
public class SIP_t_Encoding : SIP_t_ValueWithParams
{
private string m_ContentEncoding = "";
/// <summary>
/// Default constructor.
/// </summary>
public SIP_t_Encoding()
{
}
#region method Parse
/// <summary>
/// Parses "encoding" from specified value.
/// </summary>
/// <param name="value">Accept-Encoding 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 "encoding" 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)
{
/*
encoding = codings *(SEMI accept-param)
codings = content-coding / "*"
content-coding = token
*/
if(reader == null){
throw new ArgumentNullException("reader");
}
// Parse content-coding
string word = reader.ReadWord();
if(word == null){
throw new SIP_ParseException("Invalid 'encoding' value is missing !");
}
m_ContentEncoding = word;
// Parse parameters
ParseParameters(reader);
}
#endregion
#region method ToStringValue
/// <summary>
/// Converts this to valid "encoding" value.
/// </summary>
/// <returns>Returns "encoding" value.</returns>
public override string ToStringValue()
{
/*
Accept-Encoding = "Accept-Encoding" HCOLON [ encoding *(COMMA encoding) ]
encoding = codings *(SEMI accept-param)
codings = content-coding / "*"
content-coding = token
*/
StringBuilder retVal = new StringBuilder();
retVal.Append(m_ContentEncoding);
retVal.Append(ParametersToString());
return retVal.ToString();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets content encoding. Value *(STAR) means all content encodings.
/// </summary>
public string ContentEncoding
{
get{ return m_ContentEncoding; }
set{
if(string.IsNullOrEmpty(value)){
throw new ArgumentException("Property ContentEncoding value can't be null or empty !");
}
if(!TextUtils.IsToken(value)){
throw new ArgumentException("Property ContentEncoding value may be 'token' only !");
}
m_ContentEncoding = 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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