Add base product DbEntities and domain Entities

src/Printbase.Domain/Entities/Products/ProductGroup.cs

@@ -0,0 +1,49 @@
+namespace Printbase.Domain.Entities.Products;
+
+public class ProductGroup
+{
+    public Guid Id { get; private set; }
+    public string Name { get; private set; }
+    public string? Description { get; private set; }
+    public IReadOnlyCollection<ProductType> Types => _types.AsReadOnly();
+    
+    private readonly List<ProductType> _types = new();
+    
+    private ProductGroup() { }
+    
+    public ProductGroup(Guid id, string name, string? description = null)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+            throw new ArgumentException("Group name cannot be empty", nameof(name));
+            
+        Id = id;
+        Name = name;
+        Description = description;
+    }
+    
+    public void AddType(ProductType type)
+    {
+        ArgumentNullException.ThrowIfNull(type);
+
+        _types.Add(type);
+    }
+    
+    public void RemoveType(Guid typeId)
+    {
+        var type = _types.Find(t => t.Id == typeId);
+        if (type != null) _types.Remove(type);
+    }
+    
+    public void UpdateName(string name)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+            throw new ArgumentException("Group name cannot be empty", nameof(name));
+            
+        Name = name;
+    }
+    
+    public void UpdateDescription(string? description)
+    {
+        Description = description;
+    }
+}