/// <summary>
/// saves ratings for setting AHP
/// </summary>
/// <param name="list">list of user pairweise ratings</param>
/// <param name="issueId">issue id</param>
/// <param name="userId">user who is performing operation</param>
/// <returns>returns success if save was corrent, else detaild consistency error message for user</returns>
public string SaveAHPAlternativeEvaluation(List <PairwiseComparisonRatingModel> list, int issueId, int userId)
{
PairwiseComparisonRatingModel pcrm = new PairwiseComparisonRatingModel();
List <PairwiseComparisonAC> entityList = pcrm.ToEntityList(list);
return(PairwiseComparisonOp.SaveAlternativeComparison(issueId, userId, entityList));
}
/// <summary>
/// returns list of pairwise comparisons
/// if user has not made any comparisons yet then this method will construct empty comparisons
/// else return is the comparisons made
/// </summary>
/// <param name="issueId">issue id</param>
/// <param name="userId">user who is perfomring operation</param>
/// <returns>list of pairwise comparisons</returns>
public List <PairwiseComparisonRatingModel> GetPairwiseAlternativeRatings(int issueId, int userId)
{
PairwiseComparisonRatingModel pcacm = new PairwiseComparisonRatingModel();
List <PairwiseComparisonRatingModel> modelList = pcacm.ToModelList(PairwiseComparisonOp.GetAlternativeComparison(issueId, userId), pcacm);
List <Criterion> cList = CriterionOp.GetIssueCriterions(issueId, userId);
List <Alternative> aList = AlternativeOp.GetIssueAlternatives(issueId, userId);
//if user already compared alternatives then return him that
if (modelList != null && modelList.Count > 0)
{
foreach (PairwiseComparisonRatingModel model in modelList)
{
model.CriterionName = cList.Find(x => x.Id == model.CriterionId).Name;
model.LeftAltName = aList.Find(x => x.Id == model.LeftAltId).Name;
model.RightAltName = aList.Find(x => x.Id == model.RightAltId).Name;
model.Value = model.Value.Replace("important", "preferred");
}
return(modelList);
}
else // else construct the comparisons
{
modelList = new List <PairwiseComparisonRatingModel>();
foreach (Criterion crit in cList)
{
for (int i = 0; i < aList.Count; i++)
{
for (int j = i + 1; j < aList.Count; j++)
{
pcacm = new PairwiseComparisonRatingModel();
pcacm.CriterionId = crit.Id;
pcacm.CriterionName = crit.Name;
pcacm.LeftAltId = aList[i].Id;
pcacm.LeftAltName = aList[i].Name;
pcacm.RightAltId = aList[j].Id;
pcacm.RightAltName = aList[j].Name;
pcacm.Value = "Equally preferred";
pcacm.UserId = userId;
modelList.Add(pcacm);
}
}
}
return(modelList);
}
}
