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Assets/Scripts/Economy/PurchaseOrder.cs

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+using System;
+using System.Collections.Generic;
+
+namespace AfterHours.Economy
+{
+    /// <summary>Eine Position einer Großhandelsbestellung.</summary>
+    [Serializable]
+    public struct OrderLine
+    {
+        public int ProductId;
+        public int Quantity;
+        public float UnitPrice;
+
+        public float LineTotal => Quantity * UnitPrice;
+    }
+
+    /// <summary>Bestellung beim Großhandel. Wird nur serverseitig gehalten.</summary>
+    public sealed class PurchaseOrder
+    {
+        private readonly List<OrderLine> _lines = new();
+
+        public IReadOnlyList<OrderLine> Lines => _lines;
+
+        /// <summary>Spielzeit in Sekunden, zu der die Lieferung eintrifft.</summary>
+        public float DeliveryTime { get; set; }
+
+        public bool Delivered { get; set; }
+
+        public void Add(int productId, int quantity, float unitPrice)
+        {
+            if (quantity <= 0) return;
+            _lines.Add(new OrderLine { ProductId = productId, Quantity = quantity, UnitPrice = unitPrice });
+        }
+
+        public float Total()
+        {
+            float sum = 0f;
+            foreach (var line in _lines) sum += line.LineTotal;
+            return sum;
+        }
+    }
+}