api/WhatApi/Middleware/UserLastSeenMiddleware.cs


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using System.Security.Claims;

namespace WhatApi.Middleware;

public class UserLastSeenMiddleware(RequestDelegate next, Database db)
{
    public async Task InvokeAsync(HttpContext context) {
        var userIdString = context.User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (Guid.TryParse(userIdString, out var userId)) {
            var user = await db.Users.FirstOrDefaultAsync(c => c.Id == userId);
            if (user is not null) {
                user.LastSeen = DateTimeOffset.UtcNow;
                await db.SaveChangesAsync();
            }
        }
        await next(context);
    }
}