Add in-memory database and CRUD routes

Db.cs

@@ -0,0 +1,42 @@
+namespace PizzaStore.Db;
+
+public record Pizza {
+	public int Id { get; set; }
+	public string? Name { get; set; }
+}
+
+public class PizzaDb {
+	private static List<Pizza> _pizzas = [
+		new() { Id = 1, Name = "Montemagno, Pizza shaped like a great mountain" },
+		new() { Id = 2, Name = "The Galloway, Pizza shaped like a submarine, silent but deadly" },
+		new() { Id = 3, Name = "The Noring, Pizza shaped like a Viking helmet, where's the mead" }
+	];
+
+	public static List<Pizza> GetPizzas() {
+		return _pizzas;
+	}
+
+	public static Pizza? GetPizza(int id) {
+		return _pizzas.SingleOrDefault(p => p.Id == id);
+	}
+
+	public static Pizza CreatePizza(Pizza pizza) {
+		_pizzas.Add(pizza);
+		return pizza;
+	}
+
+	public static Pizza UpdatePizza(Pizza pizza) {
+		_pizzas = _pizzas.Select(p => {
+			if (p.Id == pizza.Id) {
+				p.Name = pizza.Name;
+			}
+			return p;
+		}).ToList();
+
+		return pizza;
+	}
+
+	public static void RemovePizza(int id) {
+		_pizzas = _pizzas.FindAll(p => p.Id != id).ToList();
+	}
+}

Program.cs

@@ -1,3 +1,5 @@
+using PizzaStore.Db;
+
 var builder = WebApplication.CreateBuilder(args);
 
 builder.Services.AddEndpointsApiExplorer();
@@ -14,4 +16,10 @@ app.UseSwaggerUI(c => {
 
 app.MapGet("/", () => "Hello World!");
 
+app.MapGet("/pizzas/{id}", (int id) => PizzaDb.GetPizza(id));
+app.MapGet("/pizzas", () => PizzaDb.GetPizzas());
+app.MapPost("/pizzas", (Pizza pizza) => PizzaDb.CreatePizza(pizza));
+app.MapPut("/pizzas", (Pizza pizza) => PizzaDb.UpdatePizza(pizza));
+app.MapDelete("/pizzas/{id}", (int id) => PizzaDb.RemovePizza(id));
+
 app.Run();