feat(baseEntity) : add notifications

Src/Product.Domain/Base/BaseEntity.cs

@@ -0,0 +1,88 @@
+namespace Product.Domain.Entities;
+
+public class BaseEntity
+{
+    int? _requestedHashCode;
+    int _Id;
+    public virtual int Id
+    {
+        get
+        {
+            return _Id;
+        }
+        protected set
+        {
+            _Id = value;
+        }
+    }
+
+    private List<INotification> _domainEvents;
+    public IReadOnlyCollection<INotification> DomainEvents => _domainEvents?.AsReadOnly();
+
+    public void AddDomainEvent(INotification eventItem)
+    {
+        _domainEvents = _domainEvents ?? new List<INotification>();
+        _domainEvents.Add(eventItem);
+    }
+
+    public void RemoveDomainEvent(INotification eventItem)
+    {
+        _domainEvents?.Remove(eventItem);
+    }
+
+    public void ClearDomainEvents()
+    {
+        _domainEvents?.Clear();
+    }
+
+    public bool IsTransient()
+    {
+        return this.Id == default;
+    }
+
+    public override bool Equals(object obj)
+    {
+        if (!(obj is BaseEntity))
+            return false;
+
+        if (Object.ReferenceEquals(this, obj))
+            return true;
+
+        if (this.GetType() != obj.GetType())
+            return false;
+
+        BaseEntity item = (BaseEntity)obj;
+
+        if (item.IsTransient() || this.IsTransient())
+            return false;
+        else
+            return item.Id == this.Id;
+    }
+
+    public override int GetHashCode()
+    {
+        if (!IsTransient())
+        {
+            if (!_requestedHashCode.HasValue)
+                _requestedHashCode = this.Id.GetHashCode() ^ 31; // XOR for random distribution (http://blogs.msdn.com/b/ericlippert/archive/2011/02/28/guidelines-and-rules-for-gethashcode.aspx)
+
+            return _requestedHashCode.Value;
+        }
+        else
+            return base.GetHashCode();
+
+    }
+    public static bool operator ==(BaseEntity left, BaseEntity right)
+    {
+        if (Object.Equals(left, null))
+            return (Object.Equals(right, null)) ? true : false;
+        else
+            return left.Equals(right);
+    }
+    public static bool operator !=(BaseEntity left, BaseEntity right)
+    {
+        return !(left == right);
+    }
+}
+
+

Src/Product.Domain/Base/INotification.cs

@@ -0,0 +1,6 @@
+namespace Product.Domain.Entities;
+
+public interface INotification
+{
+
+}