private static List <(string option, string criteria, decimal adjustedRdv)> CalculateCriteriaAdjustedOptionRdvs(Decision decision, Dictionary <string, decimal> criteriaRdvs)
{
var adjustedOptionCriteriaRdvs = new List <(string option, string criteria, decimal adjustedRdv)>();
foreach (var crit in decision.Criteria.Items)
{
var ocs = decision.OptionComparisons.Where(oc => oc.Criterion == crit).ToList();
// add inverses
var inverseOcs = ocs.Select(cc =>
{
var inverseOc = new OptionComparison(crit, cc.OptionTwo, cc.OptionOne);
inverseOc.SetWeight(GetInverseWeight(cc.Weight.Value));
return(inverseOc);
}).ToList();
ocs.AddRange(inverseOcs);
var totalWeight = ocs.Sum(oc => GetWeightFactor(oc.Weight.Value));
// calculate the total RDV for each option for this criterion
var optionRdvs = ocs.GroupBy(c => c.OptionOne).Select(g =>
new
{
Option = g.Key,
Rdv = g.Sum(cc => GetWeightFactor(cc.Weight.Value)) / totalWeight
}).ToList();
// record the criteria-RDV-adjusted option total RDV
foreach (var optionRdv in optionRdvs)
{
var adjustedOptionRdv = criteriaRdvs[crit] * optionRdv.Rdv;
adjustedOptionCriteriaRdvs.Add((optionRdv.Option, crit, adjustedOptionRdv));
}
}
return(adjustedOptionCriteriaRdvs);
}
private void UpdateOptionComparisons()
{
var currentHashCodes = new HashSet <int>(OptionComparisons.Select(c => c.GetHashCode()));
var proposedHashCodes = new HashSet <int>();
foreach (var crit in Criteria.Items)
{
for (int i = 0; i < Options.Items.Count(); i++)
{
for (int j = i + 1; j < Options.Items.Count(); j++)
{
var oc = new OptionComparison(crit, Options.Items.ElementAt(i), Options.Items.ElementAt(j));
oc.OnWeightChange += OnWeightChange;
var hashCode = oc.GetHashCode();
proposedHashCodes.Add(hashCode);
if (!currentHashCodes.Contains(hashCode))
{
OptionComparisons.Add(oc);
}
}
}
}
foreach (var exitstingOc in OptionComparisons.ToList())
{
if (!proposedHashCodes.Contains(exitstingOc.GetHashCode()))
{
exitstingOc.OnWeightChange -= OnWeightChange;
OptionComparisons.Remove(exitstingOc);
}
}
OptionComparisons = OptionComparisons.OrderBy(b => b.Criterion).ToList();
}