Trying to work on a recurring meeting feature in Espo and need help

[nocstaff@urbancom.net]

Since espo doesn't come with an ability to make recurring calendar, I was trying to make one myself. So far progress has been going alright, but I ran into a problem. It duplicates any meeting I try making, I don't know what is causing this, so I will share everything I've been working on and screenshots of the process to show what I've done so far.

I made a base for recurring calendar items, which will be extended for each calendar item I want this to work with in /var/www/espocrm/data/espocrm/custom/Espo/Custom/Hooks/Common/RecurringBase.php:

<?php

namespace Espo\Custom\Hooks\Common;

use Espo\ORM\Entity;
use Espo\Core\Hook\Hook\AfterSave;
use Espo\ORM\EntityManager;
use Espo\ORM\Repository\Option\SaveOptions;

class RecurringBase implements AfterSave
{
    protected EntityManager $em;

    public function __construct(EntityManager $em)
    {
        $this->em = $em;
    }

    public function afterSave(Entity $entity, SaveOptions $options): void
    {
        // Skip if not recurring or if already a generated child
        if (!$entity->get('repeat') || $options->get('isRecurringChild') === true) {
            return;
        }

        $startDate = new \DateTime($entity->get('dateStart'));
        $endDate   = new \DateTime($entity->get('dateEnd'));
        $until     = $entity->get('repeatUntil') ? new \DateTime($entity->get('repeatUntil')) : null;

        $interval  = (int) $entity->get('repeatInterval') ?: 1;
        $repeat    = $entity->get('repeat');

        $count = 0;
        $max   = 200;

        while (true) {
            $count++;

            $newStart = (clone $startDate);
            $newEnd   = (clone $endDate);

            switch ($repeat) {
                case 'Daily':
                    $newStart->modify("+{$interval} days");
                    $newEnd->modify("+{$interval} days");
                    break;
                case 'Weekly':
                    $newStart->modify("+{$interval} weeks");
                    $newEnd->modify("+{$interval} weeks");
                    break;
                case 'Monthly':
                    $newStart->modify("+{$interval} months");
                    $newEnd->modify("+{$interval} months");
                    break;
                default:
                    return;
            }

            if ($until && $newStart > $until) {
                break;
            }

            $duplicate = $this->em->getEntityFactory()->create($entity->getEntityType());

            foreach ([
                'name','description','status',
                'assignedUserId','teamsIds',
                'parentId','parentType',
                'allDay','reminders'
            ] as $f) {
                if ($entity->has($f)) {
                    $duplicate->set($f, $entity->get($f));
                }
            }

            $duplicate->set('dateStart', $newStart->format('Y-m-d H:i:s'));
            $duplicate->set('dateEnd',   $newEnd->format('Y-m-d H:i:s'));

            // Clear recurrence so children don’t recurse
            $duplicate->set('repeat', null);
            $duplicate->set('repeatInterval', null);
            $duplicate->set('repeatUntil', null);

            // Save with flag
            $this->em->saveEntity($duplicate, ['isRecurringChild' => true]);

            if ($count >= $max) {
                break;
            }

            $startDate = $newStart;
            $endDate   = $newEnd;
        }
    }
}

And in /var/www/espocrm/data/espocrm/custom/Espo/Custom/Hooks/Meeting/Recurring.php:

<?php

namespace Espo\Custom\Hooks\Meeting;

use Espo\Custom\Hooks\Common\RecurringBase;

class Recurring extends RecurringBase {}

I will be completely honest, I don't really understand how coding works in espo, my knowledge of php is very limited, and espo is very difficult to understand, so I've just been using a lot of reference material to get to where I am. I uploaded screenshots of what the process looks like and what the results are currently, and I circled the part I added into espo myself. I don't know what is causing the meeting to duplicate twice a day instead of once. This also happens when you select weekly or monthly. Can someone help me with this please?