initial commit

Shared/Utils/PurchaseRequisitionHelper.cs

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+using Indotalent.Data.Entities;
+using Indotalent.Infrastructure.Database;
+using Microsoft.EntityFrameworkCore;
+
+namespace Indotalent.Shared.Utils;
+
+public static class PurchaseRequisitionHelper
+{
+    public static void Recalculate(AppDbContext context, string requisitionId)
+    {
+        var requisition = context.PurchaseRequisition
+            .Include(x => x.Tax)
+            .SingleOrDefault(x => x.Id == requisitionId);
+
+        if (requisition == null) return;
+
+        var items = context.PurchaseRequisitionItem
+            .Where(x => x.PurchaseRequisitionId == requisitionId)
+            .ToList();
+
+        requisition.BeforeTaxAmount = items.Sum(x => (x.UnitPrice ?? 0m) * (decimal)(x.Quantity ?? 0.0));
+
+        var taxPercentage = requisition.Tax?.PercentageValue ?? 0;
+        requisition.TaxAmount = (requisition.BeforeTaxAmount ?? 0m) * (decimal)taxPercentage / 100m;
+
+        requisition.AfterTaxAmount = (requisition.BeforeTaxAmount ?? 0m) + (requisition.TaxAmount ?? 0m);
+
+        context.PurchaseRequisition.Update(requisition);
+        context.SaveChanges();
+    }
+}