CommandEventsListener.php

<?php

namespace App;

use Closure;

class CommandEventsListener
{
    protected $startCallbacks  = [];
    protected $finishCallbacks = [];

    public function __construct($commandName)
    {
        app('events')->listen('Illuminate\Console\Events\CommandStarting', function ($event) use ($commandName) {
            if ($event->command == $commandName) {
                $this->callStartCallbacks();
            }
        });

        app('events')->listen('Illuminate\Console\Events\CommandFinished', function ($event) use ($commandName) {
            if ($event->command == $commandName) {
                $this->callFinishCallbacks();
            }
        });
    }

    public function onStart(Closure $callback)
    {
        $this->startCallbacks[] = $callback;

        return $this;
    }

    public function onFinish(Closure $callback)
    {
        $this->finishCallbacks[] = $callback;

        return $this;
    }

    protected function callStartCallbacks()
    {
        foreach ($this->startCallbacks as $callback) {
            $this->exec($callback);
        }
    }

    protected function callFinishCallbacks()
    {
        foreach ($this->finishCallbacks as $callback) {
            $this->exec($callback);
        }
    }

    protected function exec($callBack)
    {
        return call_user_func($callBack);
    }
}

if you want to also check for the command params u can do

$event->input->getParameterOption('migrate:fresh') == '--seed'

so the full condition would be

$cmnd = 'migrate:fresh';

return $event->command == $cmnd && $event->input->getParameterOption($cmnd) == '--seed';