feat:Initial commit

StoreService/Database/Entities/StoreDiscount.cs

@@ -0,0 +1,36 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace StoreService.Database.Entities;
+
+/// <summary>
+/// Percentage discount that can apply to one or more store items within a time window.
+/// </summary>
+public class StoreDiscount
+{
+    #region Properties
+    public long Id { get; set; }
+    public decimal Percentage { get; set; }               // 0 - 100 (%)
+    public string? Description { get; set; }
+    public DateTime FromDate { get; set; }
+    public DateTime UntilDate { get; set; }
+    public bool IsCanceled { get; set; }
+    #endregion
+
+    #region Navigation
+    public ICollection<StoreDiscountItem> DiscountItems { get; set; } = new List<StoreDiscountItem>();
+    public ICollection<StoreOrderItemDiscount> OrderItemDiscounts { get; set; } = new List<StoreOrderItemDiscount>();
+    #endregion
+
+    #region Helpers
+    /// <summary>
+    /// Checks whether discount is active at provided moment (default: now) ignoring cancellation flag (if canceled returns false).
+    /// </summary>
+    public bool IsActive(DateTime? at = null)
+    {
+        if (IsCanceled) return false;
+        var moment = at ?? DateTime.UtcNow;
+        return moment >= FromDate && moment <= UntilDate;
+    }
+    #endregion
+}
+