public static bool TryGetTimeSpan(string data, out TimeSpan span, out ValueNodeBase.ValueUnits units)
{
span = TimeSpan.MinValue;
units = ValueNodeBase.ValueUnits.General;
if (string.IsNullOrWhiteSpace(data)) return false;
var split = data.Split(' ');
if (split.Length != 2) return false;
int val;
if (!int.TryParse(split[0], out val)) return false;
switch (split[1][0]) //just check first character
{
case 'D':
case 'd':
span = new TimeSpan(val, 0, 0, 0);
units = ValueNodeBase.ValueUnits.Days;
return true;
case 'H':
case 'h':
span = new TimeSpan(val, 0, 0);
units = ValueNodeBase.ValueUnits.Hours;
return true;
case 'M':
case 'm':
span = new TimeSpan(0, val, 0);
units = ValueNodeBase.ValueUnits.Days;
return true;
default:
return false;
}
}
private bool FinishEvaluation(string val1, ValueNodeBase.ValueNodeType nodetype1,
string val2, ValueNodeBase.ValueNodeType nodetype2)
{
do //single-pass loop to allow breaking on error
{
//ints
if (nodetype1 == ValueNodeBase.ValueNodeType.Int
&& nodetype2 == ValueNodeBase.ValueNodeType.Int)
{
int a, b;
if (!int.TryParse(val1, out a)) break;
if (!int.TryParse(val2, out b)) break;
return Compare(a, b);
}
//floats or in/float mix
if ((nodetype1 == ValueNodeBase.ValueNodeType.Float
|| nodetype1 == ValueNodeBase.ValueNodeType.Int)
&& (nodetype2 == ValueNodeBase.ValueNodeType.Float
|| nodetype2 == ValueNodeBase.ValueNodeType.Int))
{
float a, b;
if (!float.TryParse(val1, out a)) break;
if (!float.TryParse(val2, out b)) break;
return Compare(a, b);
}
//dates
if (nodetype1 == ValueNodeBase.ValueNodeType.Date
&& nodetype2 == ValueNodeBase.ValueNodeType.Date)
{
DateTime a, b;
if (!DateTime.TryParse(val1, out a)) break;
if (!DateTime.TryParse(val2, out b)) break;
return Compare(a, b);
}
//timespans
if (nodetype1 == ValueNodeBase.ValueNodeType.DateSpan
&& nodetype2 == ValueNodeBase.ValueNodeType.DateSpan)
{
TimeSpan a, b;
ValueNodeBase.ValueUnits units1, units2;
if (!Input.TryGetTimeSpan(val1, out a, out units1)) break;
if (!Input.TryGetTimeSpan(val2, out b, out units2)) break;
return Compare(a, b);
}
//mix of int/float/tiemspan
if ((nodetype1 == ValueNodeBase.ValueNodeType.DateSpan
|| nodetype1 == ValueNodeBase.ValueNodeType.Float
|| nodetype1 == ValueNodeBase.ValueNodeType.Int)
&& (nodetype2 == ValueNodeBase.ValueNodeType.DateSpan
|| nodetype2 == ValueNodeBase.ValueNodeType.Float
|| nodetype2 == ValueNodeBase.ValueNodeType.Int))
{
string span, val;
float a, b;
if (nodetype1 == ValueNodeBase.ValueNodeType.DateSpan)
{
span = val1;
val = val2;
}
else
{
span = val2;
val = val1;
}
var end = span.IndexOf(" ");
if (end < 1) break;
if (!float.TryParse(span.Substring(0, end), out a)) break;
if (!float.TryParse(val, out b)) break;
return Compare(a, b);
}
//special case for handling null dates (i.e. field node returned null)
if (((nodetype1 == ValueNodeBase.ValueNodeType.DateSpan
|| nodetype1 == ValueNodeBase.ValueNodeType.Date)
&& val2 == null)
|| ((nodetype2 == ValueNodeBase.ValueNodeType.DateSpan
|| nodetype2 == ValueNodeBase.ValueNodeType.Date)
&& val1 == null))
return false;
} while (false);
//if all else fails, compare as strings
return Compare(val1, val2);
}
public static string EncodeTimeSpan(TimeSpan span, ValueNodeBase.ValueUnits units)
{
var test = span.ToString();
switch (units)
{
case ValueNodeBase.ValueUnits.Days:
return string.Format("{0} Days", span.Days);
case ValueNodeBase.ValueUnits.Hours:
return string.Format("{0} Days", span.Hours);
case ValueNodeBase.ValueUnits.Minutes:
case ValueNodeBase.ValueUnits.General:
return string.Format("{0} Minutes", span.Days);
default:
throw new ArgumentOutOfRangeException("units");
}
}
