timefield.cs

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using System;
namespace SDP
{
    /// <summary>
    /// A RepeatTime represents a t= field contained within a TimeDescription. 
    /// 
    /// A RepeatTime specifies the start and stop times for a SessionDescription.
    /// </summary>
    public class TimeField : Field
    {
        private DateTime start;
        /// <summary>
        /// Gets the start time.
        /// </summary>
        public DateTime Start
        {
            get { return this.start; }
        }

        private DateTime stop;
        /// <summary>
        /// Gets the stop time.
        /// </summary>
        public DateTime Stop
        {
            get { return this.stop; }
        }

        /// <summary>
        /// Creates a new TimeField.
        /// </summary>
        /// <param name="value">The value portion of the field.</param>
        public TimeField(string value)
            : base("t=" + value)
        {
            string val = base.value;
            string[] parts = val.Split(' ');
            if (parts.Length == 2)
            {
                this.start = NtpTime.GetDateTime(long.Parse(parts[0]));
                this.stop = NtpTime.GetDateTime(long.Parse(parts[1]));
            }
            else
            {
                throw new Exception("Unsupported time format");
            }
        }

        /// <summary>
        /// Creates a new TimeField.
        /// </summary>
        /// <param name="start">The start time.</param>
        /// <param name="stop">The stop time.</param>
        public TimeField(DateTime start, DateTime stop)
            : this(NtpTime.GetNtpTime(start).ToString() + " " + NtpTime.GetNtpTime(stop).ToString())
        {
            this.start = start;
            this.stop = stop;
        }

        /// <summary>
        /// Converts this TimeField to its string representation.
        /// </summary>
        /// <returns>A string.</returns>
        public override string ToString()
        {
            return NtpTime.GetNtpTime(this.start).ToString() + " " + NtpTime.GetNtpTime(this.stop).ToString();
        }
    }
}