/// <summary>
/// Returns the sum of all cells that meet multiple criteria.
/// </summary>
/// <param name="arguments">The arguments used to calculate the sum.</param>
/// <param name="context">The context for the function.</param>
/// <returns>Returns the sum of all cells in the given range that pass the given criteria.</returns>
public override CompileResult Execute(IEnumerable <FunctionArgument> arguments, ParsingContext context)
{
if (!this.ArgumentsAreValid(arguments, 3, out eErrorType errorType))
{
return(new CompileResult(errorType));
}
var sumRange = arguments.ElementAt(0).Value as ExcelDataProvider.IRangeInfo;
if (sumRange == null)
{
return(new CompileResult(0d, DataType.Decimal));
}
var indicesOfValidCells = new List <int>();
for (var argumentIndex = 1; argumentIndex < arguments.Count(); argumentIndex += 2)
{
var currentRangeToCompare = arguments.ElementAt(argumentIndex).ValueAsRangeInfo;
if (currentRangeToCompare == null || !IfHelper.RangesAreTheSameShape(sumRange, currentRangeToCompare))
{
return(new CompileResult(eErrorType.Value));
}
var currentCriterion = IfHelper.ExtractCriterionObject(arguments.ElementAt(argumentIndex + 1), context);
// This will always look at every cell in the given range of cells to compare. This is done instead of
// using the iterator provided by the range of cells to compare because the collection of cells that it iterates over
// does not include empty cells that have not been set since the workbook's creation. This function
// wants to consider empty cells for comparing with the criterion, but it can be better optimized.
// A similar problem and optimization opportunity exists in the AverageIf, AverageIfs, SumIf, CountIf, and CountIfs functions.
var passingIndices = IfHelper.GetIndicesOfCellsPassingCriterion(currentRangeToCompare, currentCriterion);
if (argumentIndex == 1)
{
indicesOfValidCells = passingIndices;
}
else
{
indicesOfValidCells = indicesOfValidCells.Intersect(passingIndices).ToList();
}
}
double sumOfValidValues = 0d;
if (sumRange.Count() > 0)
{
// Again, all cells, including empty cells, need to be available here.
// The IRangeInfo will only provide non-empty cells.
var allSumValues = sumRange.AllValues();
foreach (var cellIndex in indicesOfValidCells)
{
var currentCellValue = allSumValues.ElementAt(cellIndex);
if (currentCellValue is ExcelErrorValue cellError)
{
return(new CompileResult(cellError.Type));
}
else if (ConvertUtil.IsNumeric(currentCellValue, true))
{
sumOfValidValues += ConvertUtil.GetValueDouble(currentCellValue);
}
}
}
return(this.CreateResult(sumOfValidValues, DataType.Decimal));
}
/// <summary>
/// This function applies criteria to cells across multiple ranges and counts the number of times
/// all criteria are met. If multiple cell ranges are being compared against criteria, all ranges must
/// have the same number of rows and columns as the first given range, but the ranges do not have to be
/// adjacent to each other.
/// </summary>
/// <param name="arguments">The arguments being evaluated.</param>
/// <param name="context">The context for this function.</param>
/// <returns>Returns the number of times all criteria are met across a row of cells.</returns>
public override CompileResult Execute(IEnumerable <FunctionArgument> arguments, ParsingContext context)
{
if (this.ArgumentCountIsValid(arguments, 2) == false)
{
return(new CompileResult(eErrorType.Value));
}
var firstRangeToCompare = arguments.ElementAt(0).ValueAsRangeInfo;
if (firstRangeToCompare == null)
{
return(new CompileResult(eErrorType.Value));
}
var indicesOfValidCells = new List <int>();
for (var argumentIndex = 0; argumentIndex < arguments.Count(); argumentIndex += 2)
{
var currentRangeToCompare = arguments.ElementAt(argumentIndex).ValueAsRangeInfo;
if (currentRangeToCompare == null || !IfHelper.RangesAreTheSameShape(firstRangeToCompare, currentRangeToCompare))
{
return(new CompileResult(eErrorType.Value));
}
var currentCriterion = IfHelper.ExtractCriterionObject(arguments.ElementAt(argumentIndex + 1), context);
// This will always look at every cell in the given range of cells to compare. This is done instead of
// using the iterator provided by the range of cells to compare because the collection of cells that it iterates over
// does not include empty cells that have not been set since the workbook's creation. This function
// wants to consider empty cells for comparing with the criterion, but it can be better optimized.
// A similar problem and optimization opportunity exists in the AverageIf, AverageIfs, SumIf, SumIfs, and CountIf functions.
var passingIndices = IfHelper.GetIndicesOfCellsPassingCriterion(currentRangeToCompare, currentCriterion);
if (argumentIndex == 0)
{
indicesOfValidCells = passingIndices;
}
else
{
indicesOfValidCells = indicesOfValidCells.Intersect(passingIndices).ToList();
}
}
double count = indicesOfValidCells.Count();
return(this.CreateResult(count, DataType.Integer));
}
