Billing: Add possibility to automatically add business shares

Elwig/Helpers/Billing/Billing.cs

@@ -31,6 +31,18 @@ namespace Elwig.Helpers.Billing {
                 """);
         }
 
+        public async Task AutoAdjustBusinessShare() {
+            using var cnx = await AppDbContext.ConnectAsync();
+            await AppDbContext.ExecuteBatch(cnx, $"""
+                INSERT INTO member_history (mgnr, date, business_shares, type)
+                SELECT u.mgnr, '{Utils.Today:yyyy-MM-dd}', u.diff / s.max_kg_per_bs AS bs, 'auto'
+                FROM v_total_under_delivery u
+                    JOIN season s ON s.year = u.year
+                WHERE s.year = {Year} AND bs > 0
+                ON CONFLICT DO NOTHING
+                """);
+        }
+
         public async Task CalculateBuckets(bool allowAttrsIntoLower, bool avoidUnderDeliveries, bool honorGebunden) {
             var attrVals = Context.WineAttributes.ToDictionary(a => a.AttrId, a => (a.IsStrict, a.FillLower));
             var attrForced = attrVals.Where(a => a.Value.IsStrict && a.Value.FillLower == 0).Select(a => a.Key).ToArray();