line-gestao-api/Services/TenantMiddleware.cs

using System.Security.Claims;

namespace line_gestao_api.Services;

public class TenantMiddleware
{
    private readonly RequestDelegate _next;

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

    public async Task InvokeAsync(HttpContext context, ITenantProvider tenantProvider)
    {
        Guid? tenantId = null;
        var claim = context.User.FindFirst("tenantId")?.Value
            ?? context.User.FindFirst("tenant")?.Value;
        var headerValue = context.Request.Headers["X-Tenant-Id"].FirstOrDefault();

        if (Guid.TryParse(claim, out var parsed))
        {
            tenantId = parsed;
        }
        else if (Guid.TryParse(headerValue, out var headerTenant))
        {
            tenantId = headerTenant;
        }

        tenantProvider.SetTenantId(tenantId);

        try
        {
            await _next(context);
        }
        finally
        {
            tenantProvider.SetTenantId(null);
        }
    }
}