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Edit File: RegacyHelper.php

<?php

namespace AcyMailing\Helpers;

use AcyMailing\Classes\ListClass;
use AcyMailing\Classes\UserClass;
use AcyMailing\Core\AcymObject;

class RegacyHelper extends AcymObject
{
    private array $options = [];

// What we want to add to the registration form
    public string $label = '';
    public array $lists = [];
    public string $listsHtml = '';

public function prepareLists(array $options): bool
    {
        if (empty($options['baseOption'])) {
            $options['baseOption'] = 'regacy';
        }
        $this->options = $options;

// 1 - Make sure we need to display some lists
        $visibleLists = $this->config->get($options['baseOption'].'_lists');
        if (empty($visibleLists)) return false;
        $visibleLists = explode(',', $visibleLists);
        acym_arrayToInteger($visibleLists);

$listsClass = new ListClass();
        $allLists = $listsClass->getAllWithoutManagement(true);

// Display only published and visible lists, except if we're on the back-end
        $isAdmin = acym_isAdmin();
        foreach ($visibleLists as $i => $oneListId) {
            if (in_array($oneListId, array_keys($allLists)) && $allLists[$oneListId]->active && ($allLists[$oneListId]->visible || $isAdmin)) continue;
            unset($visibleLists[$i]);
        }
        if (empty($visibleLists)) return false;

// 2 - Get the lists we should check by default
        $checkedLists = explode(',', $this->config->get($options['baseOption'].'_checkedlists'));
        acym_arrayToInteger($checkedLists);
        $userClass = new UserClass();

if ('wordpress' === ACYM_CMS) {
            // If editing a user, get its lists
            $currentCMSId = acym_getVar('int', 'user_id', 0);
            if (!empty($currentCMSId) && !current_user_can('edit_user', $currentCMSId)) {
                $currentCMSId = 0;
            }
            if (empty($currentCMSId)) $currentCMSId = acym_currentUserId();
        } else {
            if (acym_isAdmin()) {
                // If editing a user, get its lists
                $currentCMSId = acym_getVar('int', 'id', 0);
            } else {
                // If the user is logged in, take its subscription
                $currentCMSId = acym_currentUserId();
            }
        }

if (!empty($currentCMSId)) {
            $currentUser = $userClass->getOneByCMSId($currentCMSId);
            if (!empty($currentUser)) {
                $checkedLists = [];
                $currentSubscription = $userClass->getSubscriptionStatus($currentUser->id, $visibleLists);
                acym_trigger('onRegacyPrepareCheckedLists', [&$currentSubscription]);

foreach ($currentSubscription as $listId => $oneSubsciption) {
                    if ($oneSubsciption->status == '1') $checkedLists[] = $listId;
                }
            }
        }

// 3 - remove autolists from display
        $autolist = explode(',', $this->config->get($options['baseOption'].'_autolists'));
        acym_arrayToInteger($autolist);
        if (!empty($autolist)) {
            $visibleLists = array_diff($visibleLists, $autolist);
        }

// 4 - Prepare the HTML block we'll insert in the form
        $this->label = $this->config->get($options['baseOption'].'_text');
        if (empty($this->label)) $this->label = 'ACYM_SUBSCRIPTION';
        $this->label = acym_translation($this->label);

$this->lists = [];

foreach ($visibleLists as $oneListId) {
            $this->lists[$oneListId] = [
                'name' => !empty($allLists[$oneListId]->display_name) ? $allLists[$oneListId]->display_name : $allLists[$oneListId]->name,
                'checked' => in_array($oneListId, $checkedLists),
            ];
        }

if ('joomla' === ACYM_CMS || !empty($options['formatted'])) {
            $this->formatResults();
        }

return true;
    }

private function formatResults(): void
    {
        $base = $this->options['baseOption'];
        $checkedListsOnAjaxUpdate = acym_getVar('array', $base.'_visible_lists_checked', []);
        $result = '<table class="acym__'.$base.'__lists" style="border:0">';
        foreach ($this->lists as $id => $oneList) {
            $result .= '<tr style="border:0">
                            <td style="border:0">
                                <input type="checkbox" id="acym__'.$base.'__lists-'.intval(
                    $id
                ).'" class="acym_checkbox" name="'.$base.'_visible_lists_checked[]" '.acym_checked(
                    $oneList['checked'] || in_array($id, $checkedListsOnAjaxUpdate),
                    true,
                    false
                ).' value="'.intval($id).'"/>
                            </td>
                            <td style="border:0; padding-left:10px;">
                                <label for="acym__'.$base.'__lists-'.intval($id).'" class="acym__'.$base.'__lists__label">'.esc_html($oneList['name']).'</label>
                            </td>
                        </tr>';
        }
        $result .= '</table>';
        $result .= '<input type="hidden" value="'.implode(',', array_keys($this->lists)).'" name="'.$base.'_visible_lists" />';
        $source = !empty($base) && $base != 'regacy' ? $base : ACYM_CMS;
        $result .= '<input type="hidden" value="'.$source.' registration form" name="acy_source" />';
        $this->listsHtml = $result;
    }
}