public static decimal IntegerRound(decimal amount, IntegerRounding rounding)
{
var rounded = Math.Round(amount);
if (rounding.MinimalAmount == 1)
{
return(rounded);
}
Func <decimal, decimal> roundingMethod;
switch (rounding.Mode)
{
case IntegerRoundingMode.Ceiling:
roundingMethod = Math.Ceiling;
break;
case IntegerRoundingMode.Floor:
roundingMethod = Math.Floor;
break;
case IntegerRoundingMode.Round:
roundingMethod = Math.Round;
break;
default:
roundingMethod = Math.Round;
break;
}
return(roundingMethod(rounded / rounding.MinimalAmount) * rounding.MinimalAmount);
}
private static UnitValue GetUnitValue(TimeSpan value, IntegerRounding rounding, TimeSpanUnit unit)
{
double doubleValue = GetDouble(value, unit);
//int valueRoundedDown = GetInteger(doubleValue, DefaultRounding);
//int valueWithLowestUnitRounding = GetInteger(doubleValue, rounding);
int valueRounded = GetInteger(doubleValue, rounding);
return(new UnitValue(doubleValue, unit, valueRounded)); //Down, valueWithLowestUnitRounding);
}
private static int GetInteger(double doubleValue, IntegerRounding rounding)
{
switch (rounding)
{
case IntegerRounding.Down:
return((int)doubleValue);
case IntegerRounding.ToNearestOrUp:
return(Convert.ToInt32(doubleValue));
case IntegerRounding.Up:
return((int)Math.Ceiling(doubleValue));
default:
throw new NotImplementedException("IntegerRounding: " + rounding);
}
}
private static TimeSpan GetTimeSpanWithLowestUnitRounded(TimeSpan value, TimeSpanUnit lowestUnit,
IntegerRounding lowestUnitRounding)
{
int lowestUnitValueRounded = GetInteger(GetDouble(value, lowestUnit), lowestUnitRounding);
// Round the lowest unit, then reconstruct TimeSpan to round 60 seconds to 1 minute etc.
int days = value.Days,
hours = value.Hours,
minutes = value.Minutes,
seconds = value.Seconds,
milliseconds = value.Milliseconds;
switch (lowestUnit)
{
case TimeSpanUnit.Days:
days = lowestUnitValueRounded;
hours = minutes = seconds = milliseconds = 0;
break;
case TimeSpanUnit.Hours:
hours = lowestUnitValueRounded;
minutes = seconds = milliseconds = 0;
break;
case TimeSpanUnit.Minutes:
minutes = lowestUnitValueRounded;
seconds = milliseconds = 0;
break;
case TimeSpanUnit.Seconds:
seconds = lowestUnitValueRounded;
milliseconds = 0;
break;
case TimeSpanUnit.Milliseconds:
milliseconds = lowestUnitValueRounded;
break;
}
value = new TimeSpan(days, hours, minutes, seconds, milliseconds);
return(value);
}
public string RoundsLowestUnitAsSpecified(double hours, IntegerRounding rounding)
{
return(TimeSpan.FromHours(hours).ToPrettyString(lowestUnitRounding: rounding));
}
/// <summary>
/// Returns a human readable string from TimeSpan, with a max number of parts to include. Units are included from
/// largest to smallest.
/// </summary>
/// <param name="value">Time span value.</param>
/// <param name="maxUnitGroups">
/// The max number of timespan units to use.
/// </param>
/// <param name="lowestUnit">Lowest unit to include in string.</param>
/// <param name="rep"></param>
/// <param name="highestUnit">Highest unit to include in string.</param>
/// <param name="lowestUnitRounding">Rounding behavior of <paramref name="lowestUnit" />.</param>
/// <param name="formatProvider">Specify the formatProvider used to .ToString() the numeric values.</param>
/// <returns>Human readable string.</returns>
public static string ToPrettyString(this TimeSpan value,
int maxUnitGroups = 1,
UnitStringRepresentation rep = UnitStringRepresentation.Long,
TimeSpanUnit highestUnit = TimeSpanUnit.Days,
TimeSpanUnit lowestUnit = TimeSpanUnit.Seconds,
IntegerRounding lowestUnitRounding = IntegerRounding.ToNearestOrUp,
IFormatProvider formatProvider = null)
{
if (maxUnitGroups <= 0)
{
maxUnitGroups = 1;
}
TimeFormat timeFormat;
if (!Formats.TryGetValue(rep, out timeFormat))
{
throw new NotImplementedException("UnitStringRepresentation: " + rep);
}
if (value == TimeSpan.Zero)
{
return(GetUnitValueString(0, lowestUnit, timeFormat, rep, formatProvider));
}
//int days = value.Days,
// hours = value.Hours,
// minutes = value.Minutes,
// seconds = value.Seconds,
// milliseconds = value.Milliseconds;
//if (highestUnit < TimeSpanUnit.Days || lowestUnit > TimeSpanUnit.Days)
// days = 0;
//if (highestUnit < TimeSpanUnit.Hours || lowestUnit > TimeSpanUnit.Hours)
// hours = 0;
//if (highestUnit < TimeSpanUnit.Minutes || lowestUnit > TimeSpanUnit.Minutes)
// minutes = 0;
//if (highestUnit < TimeSpanUnit.Seconds || lowestUnit > TimeSpanUnit.Seconds)
// seconds = 0;
//if (highestUnit < TimeSpanUnit.Milliseconds || lowestUnit > TimeSpanUnit.Milliseconds)
// milliseconds = 0;
// Trim off any values outside range
TimeSpan trimmedValue = value; //new TimeSpan(days, hours, minutes, seconds, milliseconds);
//var roundedValue = GetRoundedValue(trimmedValue, highestUnit, lowestUnit, lowestUnitRounding, maxUnitGroups);
IList <UnitValue> nonZeroUnitValues =
GetNonZeroUnitValues(trimmedValue, highestUnit, lowestUnit, lowestUnitRounding, maxUnitGroups)
.RoundUnitsUp();
if (!nonZeroUnitValues.Any())
{
// Value is zero or near zero. Fall back to lowest unit.
// Example: 0.1 seconds when lowest unit is seconds
int nearZeroValueRounded = GetInteger(GetDouble(value, lowestUnit), lowestUnitRounding);
return(GetUnitValueString(nearZeroValueRounded, lowestUnit, timeFormat, rep, formatProvider));
}
List <string> unitStrings =
nonZeroUnitValues
.Select((uv, i) => GetUnitValueString(uv.Value, uv.Unit, timeFormat, rep, formatProvider))
.ToList();
// Example: "3 hours"
if (unitStrings.Count == 1)
{
return(unitStrings.First());
}
// Example: "1 weeks, 2 days"
string firstParts = string.Join(timeFormat.GroupSeparator, unitStrings.Take(unitStrings.Count - 1).ToArray());
// Example: "3 hours"
string lastPart = unitStrings.Last();
// Example: "1 weeks, 2 days and 3 hours"
return(firstParts + timeFormat.LastGroupSeparator + lastPart);
}
private static IList <UnitValue> GetNonZeroUnitValues(TimeSpan value, TimeSpanUnit highestUnit,
TimeSpanUnit lowestUnit, IntegerRounding lowestUnitRounding, int maxUnitGroups)
{
value = GetTimeSpanWithLowestUnitRounded(value, lowestUnit, lowestUnitRounding);
IList <UnitValue> unitValues = UnitsLargeToSmall
.Where(unit => unit <= highestUnit && unit >= lowestUnit)
.Select(unit => GetUnitValue(value, DefaultRounding, unit))
.Where(unitValue => unitValue.Value >= 1)
.Take(maxUnitGroups)
.ToList();
if (!unitValues.Any())
{
return(unitValues);
}
UnitValue last = unitValues.Last();
// ReSharper disable once CompareOfFloatsByEqualityOperator
if (last.DoubleValue == 0)
{
return(unitValues);
}
List <UnitValue> unitValuesWithLastUnitRoundedUp = unitValues
.Take(unitValues.Count - 1)
.Concat(new[] { GetUnitValue(value, lowestUnitRounding, last.Unit) })
.ToList();
return(unitValuesWithLastUnitRoundedUp);
}