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feat: GUID

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This commit is contained in:
Jaro Kaulmann
2026-03-02 14:23:15 +01:00
parent f6b70fa387
commit 48be020dc4
7 changed files with 158 additions and 44 deletions
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80
CarManagerV3/Car.cs
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@@ -7,7 +7,7 @@ namespace CarManagerV3
/// </summary>
public class Car
{
private int id;
private string id;
private string make;
private string model;
private int year;
@@ -16,14 +16,11 @@ namespace CarManagerV3
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 Id { get => id; }
public string Make { get => make;
public string Make
{
get => make;
set
{
if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Make cannot be empty.");
@@ -31,7 +28,9 @@ namespace CarManagerV3
}
}
public string Model { get => model;
public string Model
{
get => model;
set
{
if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Model cannot be empty.");
@@ -39,7 +38,9 @@ namespace CarManagerV3
}
}
public int Year { get => year;
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.");
@@ -47,7 +48,9 @@ namespace CarManagerV3
}
}
public string Color { get => color;
public string Color
{
get => color;
set
{
if (string.IsNullOrWhiteSpace(value)) throw new ArgumentException("Color cannot be empty.");
@@ -55,7 +58,9 @@ namespace CarManagerV3
}
}
public int Mileage { get => mileage;
public int Mileage
{
get => mileage;
set
{
if (value < 0) throw new ArgumentException("Mileage cannot be negative.");
@@ -63,7 +68,9 @@ namespace CarManagerV3
}
}
public decimal Price { get => price;
public decimal Price
{
get => price;
set
{
if (value < 0) throw new ArgumentException("Price cannot be negative.");
@@ -102,10 +109,21 @@ namespace CarManagerV3
/// <param name="mileage">The current mileage on the car.</param>
/// <param name="price">The selling-price of the car.</param>
/// <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)
public Car(string id, string make, string model, int year, string color, int mileage, decimal price, int order = 0)
{
// is ID just a number? Then it is legacy and needs a new ID string.
int numericId = 0;
if ((string.IsNullOrWhiteSpace(id) || int.TryParse(id, out numericId)) && id != "0")
{
id = Guid.NewGuid().ToString();
if (numericId > 0)
{
order = numericId + order;
}
}
// Sets the properties using the setters to ensure validation is applied.
this.Id = id;
this.id = id;
this.Make = make;
this.Model = model;
this.Year = year;
@@ -137,7 +155,7 @@ namespace CarManagerV3
/// <returns></returns>
public string ToCsvString()
{
return $"{this.Id};{this.Make};{this.Model};{this.Year};{this.Color};{this.Mileage};{this.Price}";
return $"{this.Id};{this.Make};{this.Model};{this.Year};{this.Color};{this.Mileage};{this.Price};{this.Order}";
}
//TODO: Add error handling for malformed CSV strings and detection for missing fields.
@@ -156,10 +174,23 @@ namespace CarManagerV3
try
{
string[] parts = csv.Split(';');
Car temp = new Car(int.Parse(parts[0]), parts[1], parts[2], int.Parse(parts[3]), parts[4], int.Parse(parts[5]), decimal.Parse(parts[6]));
if (temp.Year < 1886 || temp.Year > DateTime.Now.Year + 1) throw new Exception($"Invalid year: {temp.Year}");
if (temp.Mileage < 0) throw new Exception($"Mileage cannot be negative: {temp.Mileage}");
if (temp.Price < 0) throw new Exception($"Price cannot be negative: {temp.Price}");
// is part 7 a valid int? if not set it to 0 and log a warning.
if (parts.Length == 7)
{
Console.Error.WriteLine($"Warning: CSV string has only 7 fields, expected 8. Setting Order to 0. CSV: {csv}");
if (!StateManager.askForMigration())
{
throw new Exception("User declined migration. Cannot parse CSV string with missing Order field.");
}
Array.Resize(ref parts, 8);
parts[7] = "0";
}
else if (parts.Length != 8)
{
throw new FormatException($"CSV string has {parts.Length} fields, expected 8. CSV: {csv}");
}
Car temp = new Car(parts[0], parts[1], parts[2], int.Parse(parts[3]), parts[4], int.Parse(parts[5]), decimal.Parse(parts[6]), int.Parse(parts[7]));
return temp;
}
catch (Exception ex)
@@ -187,7 +218,14 @@ namespace CarManagerV3
/// <returns>An identical but seperate <see cref="Car"/></returns>
public Car Clone()
{
return new Car(this.Id, this.Make, this.Model, this.Year, this.Color, this.Mileage, this.Price);
return new Car(this.Id, this.Make, this.Model, this.Year, this.Color, this.Mileage, this.Price, this.Order);
}
public static bool isLegacyCsvString(string csv)
{
string[] parts = csv.Split(';');
return parts.Length == 7; // Legacy format has 7 fields, new format has 8 fields (with Order).
}
}
}