init

2024-03-13 00:33:46 +01:00
commit e124a47765
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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Kreta.BusinessLogic.Classes;
+using Kreta.Ellenorzo.Domain.VN.Ertekeles;
+
+namespace Kreta.Ellenorzo.BL.VN.Logic
+{
+    public static class AtlagLogic
+    {
+        public static decimal? GetSubListAtlag(List<ErtekelesListResponse> ertekelesek)
+            => (decimal?)ertekelesek.WeightedAverage(x => x.SzamErtek.Value, x => x.SulySzazalekErteke.Value, 2); // TODO ne legyen nullable
+
+        public static decimal GetSimpleAtlag(IEnumerable<decimal> ertekelesek)
+            => Math.Round(ertekelesek.Average(), 2);
+
+        public static (decimal? SulyozottOsztalyzatOsszege, decimal? SulyozottOsztalyzatSzama, decimal? SulyozottAtlag) GetAtlagTuple(List<ErtekelesListResponse> ertekelesek)
+            => GetSubListAtlagTuple(ErtekelesLogic.ListAtlagbaSzamitoErtekelesek(ertekelesek).ToList());
+
+        public static (decimal? SulyozottOsztalyzatOsszege, decimal? SulyozottOsztalyzatSzama, decimal? SulyozottAtlag) GetSubListAtlagTuple(List<ErtekelesListResponse> atlagbaSzamitoErtekelesek)
+        => ((decimal? SulyozottOsztalyzatOsszege, decimal? SulyozottOsztalyzatSzama, decimal? SulyozottAtlag))atlagbaSzamitoErtekelesek.WeightedAverageTuple(x => x.SzamErtek.Value, x => x.SulySzazalekErteke.Value, 2);
+
+        private static (double? weightedValueSum, double? weightSum, double? weightAverage) WeightedAverageTuple<T>(this IEnumerable<T> recordEnumeration, Func<T, double> value, Func<T, double> weight, int? round = null)
+        {
+            if (!recordEnumeration.Any())
+            {
+                return (null, null, null);
+            }
+
+            var weightedValueSum = recordEnumeration.Sum(x => value(x) * weight(x));
+            var weightSum = recordEnumeration.Sum(weight);
+            var weightAverage = round.HasValue && round > 0 ? Math.Round(weightedValueSum / weightSum, round.Value) : weightedValueSum / weightSum;
+
+            return (weightedValueSum, weightSum, weightAverage);
+        }
+
+    }
+}