Billing: Fixes

Elwig/Helpers/Utils.cs

@@ -12,6 +12,8 @@ using System.Text;
 using System.Numerics;
 using Elwig.Models.Entities;
 using System.IO;
+using ScottPlot.TickGenerators.TimeUnits;
+using Elwig.Helpers.Billing;
 
 namespace Elwig.Helpers {
     public static partial class Utils {
@@ -359,5 +361,27 @@ namespace Elwig.Helpers {
             }
             return output.OrderByDescending(l => l.Count());
         }
+
+        public static List<string> GetAttributeVarieties(AppDbContext ctx, int year, bool withSlash = false) {
+            return ctx.DeliveryParts
+               .Where(d => d.Year == year)
+               .Select(d => $"{d.SortId}{(withSlash ? "/" : "")}{d.AttrId}")
+               .Distinct()
+               .ToList()
+               .Union(ctx.WineVarieties.Select(v => v.SortId))
+               .ToList();
+        }
+
+        public static List<ContractSelection> GetContractsForYear(AppDbContext ctx, int year) {
+            return ctx.DeliveryParts
+                .Where(p => p.Year == year)
+                .Select(d => new ContractSelection(d.Variant, d.Attribute))
+                .Distinct()
+                .ToList()
+                .Union(ctx.WineVarieties.Select(v => new ContractSelection(v, null)))
+                .DistinctBy(c => c.Listing)
+                .Order()
+                .ToList();
+        }
     }
 }