GameList/Infrastructure/EnsurePlayerExistsMiddleware.cs

using GameList.Data;
using GameList.Domain;
using Microsoft.AspNetCore.Authentication;

namespace GameList.Infrastructure;

public class EnsurePlayerExistsMiddleware(RequestDelegate next)
{
    public async Task InvokeAsync(HttpContext context, AppDbContext db)
    {
        if (context.User.Identity?.IsAuthenticated == true)
        {
            var id = context.User.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier)?.Value;
            if (string.IsNullOrWhiteSpace(id) || !Guid.TryParse(id, out var playerId))
            {
                await context.SignOutAsync();
                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
                return;
            }

            var player = await db.Players.FindAsync(playerId);
            if (player is null)
            {
                await context.SignOutAsync();
                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
                return;
            }

            context.Items[nameof(Player)] = player;
        }

        await next(context);
    }
}