feat: set & get validation

CarManagerV3/Car.cs

@@ -11,14 +11,73 @@ namespace CarManagerV3
     /// </summary>
     public class Car
     {
-        public int Id;
-        public string Make;
-        public string Model;
-        public int Year;
-        public string Color;
-        public int Mileage;
-        public decimal Price;
-        public int Order;
+        private int id;
+        private string make;
+        private string model;
+        private int year;
+        private string color;
+        private int mileage;
+        private decimal price;
+        private int order;
+
+        public int Id { get => id; 
+            set {
+                if (value < 0) throw new ArgumentException("Id cannot be negative.");
+                id = value;
+            } 
+        }
+
+        public string Make { get => make; 
+            set
+            {
+                if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Make cannot be empty.");
+                make = value;
+            }
+        }
+
+        public string Model { get => model; 
+            set
+            {
+                if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Model cannot be empty.");
+                model = value;
+            }
+        }
+
+        public int Year { get => year; 
+            set
+            {
+                
+                if (value < 1886 || value > DateTime.Now.Year + 1) throw new ArgumentException("Year must be between 1886 and next year.");
+                Console.WriteLine($"Updating year to {year}");
+                year = value;
+            }
+        }
+
+        public string Color { get => color; 
+            set
+            {
+                if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Color cannot be empty.");
+                color = value;
+            }
+        }
+
+        public int Mileage { get => mileage; 
+            set
+            {
+                if (value < 0) throw new ArgumentException("Mileage cannot be negative.");
+                mileage = value;
+            }
+        }
+
+        public decimal Price { get => price; 
+            set
+            {
+                if (value < 0) throw new ArgumentException("Price cannot be negative.");
+                price = value;
+            }
+        }
+
+        public int Order { get => order; set => order = value; }
 
         //TODO: Make Id read-only CUID. Allows for better integrity, especially when merging.
         //TODO: Add buying price and automatic calculation of profit/loss with selling price suggestion.
@@ -38,6 +97,7 @@ namespace CarManagerV3
         /// <param name="order">The order.</param>
         public Car(int id, string make, string model, int year, string color, int mileage, decimal price, int order = 0)
         {
+            // Sets the properties using the setters to ensure validation is applied.
             this.Id = id;
             this.Make = make;
             this.Model = model;