Added ApiExtensions to 00

Author: csharpfritz

save-points/00-get-started/BlazingPizza.Server/PizzaApiExtensions.cs

@@ -0,0 +1,60 @@
+using System.Security.Claims;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.EntityFrameworkCore;
+
+namespace BlazingPizza.Server;
+
+public static class PizzaApiExtensions
+{
+
+	public static WebApplication MapPizzaApi(this WebApplication app)
+	{
+
+		// Subscribe to notifications
+		app.MapPut("/notifications/subscribe", [Authorize] async (
+			HttpContext context,
+			PizzaStoreContext db,
+			NotificationSubscription subscription) =>
+		{
+
+			// We're storing at most one subscription per user, so delete old ones.
+			// Alternatively, you could let the user register multiple subscriptions from different browsers/devices.
+			var userId = GetUserId(context);
+			var oldSubscriptions = db.NotificationSubscriptions.Where(e => e.UserId == userId);
+			db.NotificationSubscriptions.RemoveRange(oldSubscriptions);
+
+			// Store new subscription
+			subscription.UserId = userId;
+			db.NotificationSubscriptions.Attach(subscription);
+
+			await db.SaveChangesAsync();
+			return Results.Ok(subscription);
+
+		});
+
+		// Specials
+		app.MapGet("/specials", async (PizzaStoreContext db) =>
+		{
+
+			var specials = await db.Specials.ToListAsync();
+			return Results.Ok(specials);
+
+		});
+
+		// Toppings
+		app.MapGet("/toppings", async (PizzaStoreContext db) =>
+		{
+			var toppings = await db.Toppings.OrderBy(t => t.Name).ToListAsync();
+			return Results.Ok(toppings);
+		});
+
+		return app;
+
+	}
+
+	private static string GetUserId(HttpContext context)
+	{
+		return context.User.FindFirstValue(ClaimTypes.NameIdentifier);
+	}
+
+}