Merge pull request #30 from phamtiendungcw/dungcw

This pull request focuses on enhancing code robustness, error handling, and reducing redundancy through the adoption of non-nullable reference types and initialization of properties with default values across various classes and DTOs.

Author: phamtiendungcw

src/MLS.Domain/Entities/Address.cs

@@ -4,13 +4,13 @@ namespace MLS.Domain.Entities
 {
     public class Address : BaseEntity
     {
-        public string Street { get; set; }
-        public string City { get; set; }
-        public string State { get; set; }
-        public string Country { get; set; }
-        public string PostalCode { get; set; }
+        public string Street { get; set; } = string.Empty;
+        public string City { get; set; } = string.Empty;
+        public string State { get; set; } = string.Empty;
+        public string Country { get; set; } = string.Empty;
+        public string PostalCode { get; set; } = string.Empty;
 
         public int UserId { get; set; } // Foreign key referencing User
-        public User User { get; set; } // Navigation property for User
+        public User User { get; set; } = null!; // Navigation property for User
     }
 }

src/MLS.Domain/Entities/Article.cs

@@ -4,14 +4,14 @@ namespace MLS.Domain.Entities
 {
     public class Article : BaseEntity
     {
-        public string Title { get; set; } // Article title
-        public string Content { get; set; } // Article content
-        public string Author { get; set; } // Author name
+        public string Title { get; set; } = string.Empty; // Article title
+        public string Content { get; set; } = string.Empty; // Article content
+        public string Author { get; set; } = string.Empty; // Author name
         public DateTime PublicationDate { get; set; } // Date and time of publication
 
         public int UserId { get; set; } // Foreign key referencing User (author)
-        public User AuthorUser { get; set; } // Navigation property for User
+        public User AuthorUser { get; set; } = null!; // Navigation property for User
 
-        public List<Comment> Comments { get; set; } // One-to-Many relationship with Comment
+        public List<Comment> Comments { get; set; } = new(); // One-to-Many relationship with Comment
     }
 }

src/MLS.Domain/Entities/Category.cs

@@ -4,9 +4,9 @@ namespace MLS.Domain.Entities
 {
     public class Category : BaseEntity
     {
-        public string Name { get; set; } // Category name
-        public string Description { get; set; } // Optional category description
+        public string Name { get; set; } = string.Empty; // Category name
+        public string Description { get; set; } = string.Empty; // Optional category description
 
-        public ICollection<Product> Products { get; set; } // One-to-Many relationship with Product
+        public ICollection<Product> Products { get; set; } = new List<Product>(); // One-to-Many relationship with Product
     }
 }

src/MLS.Domain/Entities/Comment.cs

@@ -4,14 +4,14 @@ namespace MLS.Domain.Entities
 {
     public class Comment : BaseEntity
     {
-        public string Content { get; set; } // Comment content
-        public string Author { get; set; } // Comment author name (optional)
+        public string Content { get; set; } = string.Empty; // Comment content
+        public string? Author { get; set; } // Comment author name (optional)
         public DateTime Timestamp { get; set; } // Date and time comment was posted
 
         public int ArticleId { get; set; } // Foreign key referencing Article (optional)
-        public Article Article { get; set; } // Navigation property for Article
+        public Article Article { get; set; } = null!; // Navigation property for Article
 
         public int UserId { get; set; } // Foreign key referencing User (optional)
-        public User Commenter { get; set; } // Navigation property for User
+        public User Commenter { get; set; } = null!; // Navigation property for User
     }
 }

src/MLS.Domain/Entities/Discount.cs

@@ -4,7 +4,7 @@ namespace MLS.Domain.Entities
 {
     public class Discount : BaseEntity
     {
-        public string Code { get; set; }
+        public string Code { get; set; } = string.Empty;
         public decimal Percentage { get; set; } // Percentage discount off the price
         public DateTime StartDate { get; set; } // Start date of the discount
         public DateTime EndDate { get; set; } // End date of the discount

src/MLS.Domain/Entities/Notification.cs

@@ -4,11 +4,11 @@ namespace MLS.Domain.Entities
 {
     public class Notification : BaseEntity
     {
-        public string Message { get; set; } // Notification message content
+        public string Message { get; set; } = string.Empty; // Notification message content
         public DateTime Timestamp { get; set; } // Date and time notification was sent
         public bool IsRead { get; set; }
 
         public int UserId { get; set; } // Foreign key referencing User
-        public User User { get; set; } // Navigation property for User
+        public User User { get; set; } = null!; // Navigation property for User
     }
 }

src/MLS.Domain/Entities/Order.cs

@@ -6,11 +6,11 @@ public class Order : BaseEntity
     {
         public DateTime OrderDate { get; set; } // Date and time order was placed
         public decimal TotalPrice { get; set; } // Total order amount including discounts
-        public string OrderStatus { get; set; } // Order status (e.g., "Pending", "Processing", "Shipped", "Delivered")
+        public string OrderStatus { get; set; } = string.Empty; // Order status (e.g., "Pending", "Processing", "Shipped", "Delivered")
 
         public int UserId { get; set; } // Foreign key referencing User
-        public User User { get; set; } // Navigation property for User
+        public User User { get; set; } = null!; // Navigation property for User
 
-        public List<OrderDetail> OrderDetails { get; set; } // One-to-Many relationship with OrderDetail
+        public List<OrderDetail> OrderDetails { get; set; } = new(); // One-to-Many relationship with OrderDetail
     }
 }

src/MLS.Domain/Entities/OrderDetail.cs

@@ -5,12 +5,12 @@ namespace MLS.Domain.Entities
     public class OrderDetail : BaseEntity
     {
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
 
         public int Quantity { get; set; } // Quantity of the product ordered
         public decimal UnitPrice { get; set; } // UnitPrice of the product at the time of order
 
         public int OrderId { get; set; } // Foreign key referencing Order
-        public Order Order { get; set; } // Navigation property for Order
+        public Order Order { get; set; } = null!; // Navigation property for Order
     }
 }

src/MLS.Domain/Entities/Payment.cs

@@ -4,11 +4,11 @@ namespace MLS.Domain.Entities
 {
     public class Payment : BaseEntity
     {
-        public string PaymentMethod { get; set; } // Payment method (e.g., "Credit Card", "PayPal")
+        public string PaymentMethod { get; set; } = string.Empty; // Payment method (e.g., "Credit Card", "PayPal")
         public decimal AmountPaid { get; set; } // Amount paid
         public DateTime PaymentDate { get; set; } // Date and time payment was made
 
         public int OrderId { get; set; } // Foreign key referencing Order
-        public Order Order { get; set; } // Navigation property for Order
+        public Order Order { get; set; } = null!; // Navigation property for Order
     }
 }

src/MLS.Domain/Entities/Product.cs

@@ -4,17 +4,17 @@ namespace MLS.Domain.Entities
 {
     public class Product : BaseEntity
     {
-        public string Name { get; set; } // Product name
-        public string Description { get; set; } // Product description
+        public string Name { get; set; } = string.Empty; // Product name
+        public string Description { get; set; } = string.Empty; // Product description
         public decimal Price { get; set; } // Product price
 
         public int CategoryId { get; set; } // Foreign key referencing Category
-        public Category Category { get; set; } // Navigation property for Category
+        public Category Category { get; set; } = null!; // Navigation property for Category
 
-        public List<ProductOption> ProductOptions { get; set; } // One-to-Many relationship with ProductOption
-        public List<ProductColor> ProductColors { get; set; } // One-to-Many relationship with ProductColor
-        public List<ProductImage> ProductImages { get; set; } // One-to-Many relationship with ProductImage
-        public List<ProductReview> ProductReviews { get; set; } // One-to-Many relationship with ProductReview
-        public List<OrderDetail> OrderDetails { get; set; } // One-to-Many relationship with OrderDetail
+        public List<ProductOption> ProductOptions { get; set; } = new(); // One-to-Many relationship with ProductOption
+        public List<ProductColor> ProductColors { get; set; } = new(); // One-to-Many relationship with ProductColor
+        public List<ProductImage> ProductImages { get; set; } = new(); // One-to-Many relationship with ProductImage
+        public List<ProductReview> ProductReviews { get; set; } = new(); // One-to-Many relationship with ProductReview
+        public List<OrderDetail> OrderDetails { get; set; } = new(); // One-to-Many relationship with OrderDetail
     }
 }

src/MLS.Domain/Entities/ProductColor.cs

@@ -4,10 +4,10 @@ namespace MLS.Domain.Entities
 {
     public class ProductColor : BaseEntity
     {
-        public string ColorName { get; set; } // Color name (e.g., "Red", "Blue")
-        public string ColorHexCode { get; set; } // Hexadecimal color code (#FF0000, #0000FF)
+        public string ColorName { get; set; } = string.Empty; // Color name (e.g., "Red", "Blue")
+        public string ColorHexCode { get; set; } = string.Empty; // Hexadecimal color code (#FF0000, #0000FF)
 
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
     }
 }

src/MLS.Domain/Entities/ProductImage.cs

@@ -4,10 +4,10 @@ namespace MLS.Domain.Entities
 {
     public class ProductImage : BaseEntity
     {
-        public string ImageUrl { get; set; } // URL of the product image
-        public string ImageDescription { get; set; } // Optional image description
+        public string ImageUrl { get; set; } = string.Empty; // URL of the product image
+        public string? ImageDescription { get; set; } // Optional image description
 
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
     }
 }

src/MLS.Domain/Entities/ProductOption.cs

@@ -4,10 +4,10 @@ namespace MLS.Domain.Entities
 {
     public class ProductOption : BaseEntity
     {
-        public string Name { get; set; } // Option name (e.g., "Size", "Color")
+        public string Name { get; set; } = string.Empty; // Option name (e.g., "Size", "Color")
         public decimal Value { get; set; } // Option value (e.g., "25", "Black")
 
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
     }
 }

src/MLS.Domain/Entities/ProductReview.cs

@@ -5,13 +5,13 @@ namespace MLS.Domain.Entities
     public class ProductReview : BaseEntity
     {
         public int Rating { get; set; } // Rating out of 5 stars
-        public string ReviewText { get; set; } // Detailed review text
+        public string ReviewText { get; set; } = string.Empty; // Detailed review text
         public DateTime ReviewDate { get; set; } // Date and time review was posted
 
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
 
         public int UserId { get; set; } // Foreign key referencing User
-        public User User { get; set; } // Navigation property for User
+        public User User { get; set; } = null!; // Navigation property for User
     }
 }

src/MLS.Domain/Entities/ProductTag.cs

@@ -4,12 +4,12 @@ namespace MLS.Domain.Entities
 {
     public class ProductTag : BaseEntity
     {
-        public string TagName { get; set; } // Tag name (e.g., "Electronics", "Clothing")
+        public string TagName { get; set; } = string.Empty; // Tag name (e.g., "Electronics", "Clothing")
 
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
 
         public int TagId { get; set; } // Foreign key referencing Tag
-        public Tag Tag { get; set; } // Navigation property for Tag
+        public Tag Tag { get; set; } = null!; // Navigation property for Tag
     }
 }

src/MLS.Domain/Entities/Shipment.cs

@@ -4,11 +4,11 @@ namespace MLS.Domain.Entities
 {
     public class Shipment : BaseEntity
     {
-        public string ShippingMethod { get; set; } // Shipping method (e.g., "UPS Ground", "FedEx Express")
-        public string TrackingNumber { get; set; } // Tracking number for the shipment
+        public string ShippingMethod { get; set; } = string.Empty; // Shipping method (e.g., "UPS Ground", "FedEx Express")
+        public string? TrackingNumber { get; set; } // Tracking number for the shipment
         public DateTime EstimatedDeliveryDate { get; set; } // Estimated delivery date
 
         public int OrderId { get; set; } // Foreign key referencing Order
-        public Order Order { get; set; } // Navigation property for Order
+        public Order Order { get; set; } = null!; // Navigation property for Order
     }
 }

src/MLS.Domain/Entities/ShoppingCart.cs

@@ -5,8 +5,8 @@ namespace MLS.Domain.Entities
     public class ShoppingCart : BaseEntity
     {
         public int UserId { get; set; } // Foreign key referencing User
-        public User User { get; set; } // Navigation property for User
+        public User User { get; set; } = null!; // Navigation property for User
 
-        public List<ShoppingCartItem> ShoppingCartItems { get; set; } // One-to-Many relationship with ShoppingCartItem
+        public List<ShoppingCartItem> ShoppingCartItems { get; set; } = new(); // One-to-Many relationship with ShoppingCartItem
     }
 }

src/MLS.Domain/Entities/ShoppingCartItem.cs

@@ -5,12 +5,12 @@ namespace MLS.Domain.Entities
     public class ShoppingCartItem : BaseEntity
     {
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
 
         public int Quantity { get; set; } // Quantity of the product in the cart
         public decimal Price { get; set; } // Price of the product at the time it was added to the cart
 
         public int ShoppingCartId { get; set; } // Foreign key referencing ShoppingCart
-        public ShoppingCart ShoppingCart { get; set; } // Navigation property for ShoppingCart
+        public ShoppingCart ShoppingCart { get; set; } = null!; // Navigation property for ShoppingCart
     }
 }

src/MLS.Domain/Entities/Supplier.cs

@@ -4,10 +4,10 @@ namespace MLS.Domain.Entities
 {
     public class Supplier : BaseEntity
     {
-        public string Name { get; set; } // Supplier name
-        public string ContactEmail { get; set; } // Contact details email
-        public string ContactPhone { get; set; } // Contact details phone
+        public string Name { get; set; } = string.Empty; // Supplier name
+        public string ContactEmail { get; set; } = string.Empty; // Contact details email
+        public string ContactPhone { get; set; } = string.Empty; // Contact details phone
 
-        public List<Product> Products { get; set; } // One-to-Many relationship with Product
+        public List<Product> Products { get; set; } = new(); // One-to-Many relationship with Product
     }
 }

src/MLS.Domain/Entities/Supply.cs

@@ -5,10 +5,10 @@ namespace MLS.Domain.Entities
     public class Supply : BaseEntity
     {
         public int ProductId { get; set; } // Foreign key referencing Product
-        public Product Product { get; set; } // Navigation property for Product
+        public Product Product { get; set; } = null!; // Navigation property for Product
 
         public int SupplierId { get; set; } // Foreign key referencing Supplier
-        public Supplier Supplier { get; set; } // Navigation property for Supplier
+        public Supplier Supplier { get; set; } = null!; // Navigation property for Supplier
 
         public int Quantity { get; set; } // Quantity of the product supplied by the supplier
         public decimal Price { get; set; } // Cost of the product from the supplier

src/MLS.Domain/Entities/Tag.cs

@@ -4,9 +4,9 @@ namespace MLS.Domain.Entities
 {
     public class Tag : BaseEntity
     {
-        public string Name { get; set; } // Tag name (e.g., "Electronics", "Clothing")
+        public string Name { get; set; } = string.Empty; // Tag name (e.g., "Electronics", "Clothing")
 
-        public ICollection<ProductTag> ProductTags { get; set; } // One-to-Many relationship with ProductTag
-        public ICollection<Article> Articles { get; set; } // One-to-Many relationship with Article (optional)
+        public ICollection<ProductTag> ProductTags { get; set; } = new List<ProductTag>(); // One-to-Many relationship with ProductTag
+        public ICollection<Article> Articles { get; set; } = new List<Article>(); // One-to-Many relationship with Article (optional)
     }
 }

src/MLS.Domain/Entities/User.cs

@@ -4,17 +4,17 @@ namespace MLS.Domain.Entities
 {
     public class User : BaseEntity
     {
-        public string Username { get; set; } // Unique username for login
-        public string Email { get; set; } // User's email address
-        public string PasswordHash { get; set; } // Hashed password for security
-        public string FirstName { get; set; } // User's FirstName
-        public string LastName { get; set; } // User's LastName
-        public string Phone { get; set; } // User's phone number
+        public string Username { get; set; } = string.Empty; // Unique username for login
+        public string Email { get; set; } = string.Empty; // User's email address
+        public string PasswordHash { get; set; } = string.Empty; // Hashed password for security
+        public string FirstName { get; set; } = string.Empty; // User's FirstName
+        public string LastName { get; set; } = string.Empty; // User's LastName
+        public string Phone { get; set; } = string.Empty; // User's phone number
 
-        public ICollection<Order> Orders { get; set; } // One-to-Many relationship with Order
-        public ICollection<ProductReview> ProductReviews { get; set; } // One-to-Many relationship with ProductReview
-        public ICollection<WishList> WishLists { get; set; } // One-to-Many relationship with WishList
-        public ICollection<Comment> Comments { get; set; } // One-to-Many relationship with Comment
-        public ICollection<Notification> Notifications { get; set; } // One-to-Many relationship with Notification
+        public ICollection<Order> Orders { get; set; } = new List<Order>(); // One-to-Many relationship with Order
+        public ICollection<ProductReview> ProductReviews { get; set; } = new List<ProductReview>(); // One-to-Many relationship with ProductReview
+        public ICollection<WishList> WishLists { get; set; } = new List<WishList>(); // One-to-Many relationship with WishList
+        public ICollection<Comment> Comments { get; set; } = new List<Comment>(); // One-to-Many relationship with Comment
+        public ICollection<Notification> Notifications { get; set; } = new List<Notification>(); // One-to-Many relationship with Notification
     }
 }