views – Send hook preprocess_views_view results to custom form or services

I am developing a feature that allows anonymous users to receive by email the result of a facets + searchAPI.

Facets and Search API work perfectly. The custom module that allows to send an email too. I have also created a custom form (FormAPi) to let user gives its mail and send the datas on submit.

To get the results of the facets search, I use the preprocess_views_view in .module file

function my_module_preprocess_views_view__VIEW_ID(array &$variables): void {
  foreach ($variables('view')->result as $result) {
    $node = $result->_object->getEntity();
    $title = $node->get('title')->getValue()(0)('value');
    $custom_field = $node->get('custom_field')->getValue()(0)('value');

Every time a facet is modified, I can see the result with a dump() and everything is ok. Maybe this is not the right hook in my case but it returns what I expect.

However, I don’t know how to pass the result of this hook to my custom form which is inserted in a custom block on the page with the facets results view.

When the user submits the form, I need to know what the hook previously returned in SendSearchForm()

public function submitForm(array &$form, FormStateInterface $form_state) {

        // email entered by user
        $email = $form_state->getValue('email');
        // send email but need to send also my_module_preprocess_views_view__VIEW_ID results
        $this->sendEmail($email, $facets_result);

Do you have a suggestion to do this properly with Drupal?