/// <summary>
/// Returns a union of the current date range and the specified
/// date range. The date ranges do not have to overlap.
/// </summary>
public TimeRange Union(TimeRange timeRange)
{
TimeSpan startTime = TimeSpan.Zero;
TimeSpan stopTime = TimeSpan.Zero;
if (Compare(_startTime, timeRange.StartTime) != 1)
{
startTime = _startTime;
}
else
{
startTime = timeRange.StartTime;
}
if (Compare(_stopTime, timeRange.StopTime) != -1)
{
stopTime = _stopTime;
}
else
{
stopTime = timeRange.StopTime;
}
return new TimeRange(startTime, stopTime);
}
/// <summary>
/// Returns whether the specified object equals the current <see cref="TimeRange"/>.
/// </summary>
public bool Equals(TimeRange compare)
{
return (Compare(_startTime, compare.StartTime) == 0 && Compare(_stopTime, compare.StopTime) == 0);
}
/// <summary>
/// Returns an intersection of the current data range and the specified
/// date range. If there is no intersection between the date ranges, then
/// <see cref="TimeRange.Empty"/> is returned.
/// </summary>
public TimeRange Intersect(TimeRange timeRange)
{
TimeRange intersection = TimeRange.Empty;
// test for scenario 5 & 6
if (Compare(_startTime, timeRange.StopTime) != 1 &&
Compare(_stopTime, timeRange.StartTime) != -1)
{
// if we passed the first test, then there is some overlap.
TimeSpan startTime = TimeSpan.Zero;
TimeSpan stopTime = TimeSpan.Zero;
if (Compare(_startTime, timeRange.StartTime) != -1)
{
startTime = _startTime;
}
else
{
startTime = timeRange.StartTime;
}
if (Compare(_stopTime, timeRange.StopTime) != 1)
{
stopTime = _stopTime;
}
else
{
stopTime = timeRange.StopTime;
}
intersection = new TimeRange(startTime, stopTime);
}
return intersection;
}
/// <summary>
/// Parses the specified string and returns the parsed date range.
/// </summary>
public static bool TryParse(string timeRangeString, out TimeRange timeRangeOutput)
{
timeRangeOutput = null;
bool success = false;
if (timeRangeString != null && timeRangeString.Length != 0)
{
string[] timeRangeParts = timeRangeString.Split('-');
timeRangeOutput = new TimeRange();
DateTime startDate = DateUtility.ZeroDateTime;
string firstPart = timeRangeParts[0].Trim();
if (DateTime.TryParse(firstPart, out startDate))
{
timeRangeOutput.StartTime = startDate.TimeOfDay;
success = true;
if (timeRangeParts.Length != 2)
{
timeRangeOutput.StopTime = TimeSpan.Zero;
}
else
{
DateTime stopDate = DateUtility.ZeroDateTime;
if (DateTime.TryParse(timeRangeParts[1].Trim(), out stopDate))
{
timeRangeOutput.StopTime = stopDate.TimeOfDay;
success = true;
}
else
{
success = false;
}
}
}
else
{
TimeSpan startTime = TimeSpan.Zero;
if (TimeSpan.TryParse(firstPart, out startTime))
{
timeRangeOutput.StartTime = startTime;
success = true;
if (timeRangeParts.Length != 2)
{
timeRangeOutput.StopTime = TimeSpan.Zero;
}
else
{
TimeSpan stopTime = TimeSpan.Zero;
if (TimeSpan.TryParse(timeRangeParts[1].Trim(), out stopTime))
{
timeRangeOutput.StopTime = stopTime;
success = true;
}
else
{
success = false;
}
}
}
}
}
return success;
}
