gott/Middleware/AuthMiddleware.cs

using System.Threading.Tasks;
using Gott.Services;
using Microsoft.AspNetCore.Http;

namespace Gott.Middleware;

public class AuthMiddleware
{
    private readonly RequestDelegate _next;

    public AuthMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    public async Task InvokeAsync(HttpContext ctx, AuthService auth)
    {
        var path = ctx.Request.Path.Value ?? "";

        // Static files and login endpoint don't require auth
        if (!path.StartsWith("/api/") || path == "/api/auth/login")
        {
            await _next(ctx);
            return;
        }

        var token = ctx.Request.Cookies["gott_token"];
        var userId = auth.ValidateToken(token);

        if (userId == null)
        {
            ctx.Response.StatusCode = 401;
            await ctx.Response.WriteAsJsonAsync(new { error = "Not authenticated" });
            return;
        }

        ctx.Items["UserId"] = userId;
        await _next(ctx);
    }
}