processform.php

<?php

private function processForm(Form $form, Event $event): bool
{

    /** @var \Grav\Plugin\Form\Form $form */
    $form->validate();

    /** @var Flex $flex */
    $flex = $this->grav['flex'];

    /** @var FlexDirectory $dir */
    $dir = $flex->getDirectory('therapies');

    /** @var array $data */
    $data = $form->getData()->toArray();

    //no need captcha data
    unset($data['basic-captcha']);

    $addFolder = $this->grav['page']->folder();
    $therapiesFolder = $this->grav['page']->parent()->folder();

    $newData = [];
    foreach ($data['description_files'] as $key => $file) {
        //replace the "user/pages/xxx" url on the image into the flex route
        $path = str_replace('user/pages/' . $therapiesFolder . '/' . $addFolder . '/', '', $file['path']);
        $data['description_files'][$key]['path'] = $path;
        //++
        $newData[$path] = $data['description_files'][$key];
    }
    $data['description_files'] = $newData;

    $obj = $dir->createObject($data);
    $obj->setProperty('published', 0);

    try {
        /** @var FormFlash $flash */
        $flash = $form->getFlash();
        $obj->update($data, $flash->getFilesByFields(true));
        $obj->save();

        if ($obj instanceof FlexObjectInterface) {
            $flash->clearFiles();
            $flash->save();
        }
    } catch (\Exception $e) {
        $form->setMessage($e->getMessage(), 'error');
        //stop the event running
        $event->stopPropagation();

        //TODO: sync with dropzone (it's broken after that code)
        // if ($obj instanceof FlexObjectInterface) {
        //     $flash->clearFiles();
        //     $flash->save();
        // }

        return false;
    }
    
    return true;
}