streamline-emr/docker/_streamline-src/app/Http/Middleware/UserActivity.php

<?php

namespace Streamline\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Auth;
use Cache;
use Streamline\Models\User;

class UserActivity
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        if (Auth::check()) {
            $expiresAt = now()->addSeconds(120); /* keep online for 2 min */
            Cache::put('user-is-online-' . Auth::user()->id, true, $expiresAt);
  
            /* last seen */
            User::where('id', Auth::user()->id)->update(['last_seen' => now()]);
        }
  
        return $next($request);
    }
}