opencart-module/admin/controller/module/retailcrm.php

<?php

require_once DIR_SYSTEM . 'library/retailcrm.php';

class ControllerModuleRetailcrm extends Controller
{
    private $error = array();
    protected $log, $statuses, $payments, $deliveryTypes, $retailcrm;
    public $children, $template;

    public function install()
    {
        $this->load->model('setting/setting');
        $this->model_setting_setting->editSetting(
            'retailcrm',
            array('retailcrm_status' => 1)
        );
    }

    public function uninstall()
    {
        $this->load->model('setting/setting');
        $this->model_setting_setting->editSetting(
            'retailcrm',
            array('retailcrm_status' => 0)
        );
    }

    public function index()
    {

        $this->load->model('setting/setting');
        $this->load->model('setting/extension');
        $this->load->model('retailcrm/references');
        $this->load->language('module/retailcrm');
        $this->document->setTitle($this->language->get('heading_title'));
        $this->document->addStyle('/admin/view/stylesheet/retailcrm.css');

        if (
            $this->request->server['REQUEST_METHOD'] == 'POST'
            &&
            $this->validate()
        ) {
            $this->model_setting_setting
                ->editSetting('retailcrm', $this->request->post);

            $this->session->data['success'] = $this->language->get('text_success');

            $this->redirect(
                $this->url->link(
                    'extension/module',
                    'token=' . $this->session->data['token'], 'SSL'
                )
            );
        }

        $text_strings = array(
            'heading_title',
            'text_enabled',
            'text_disabled',
            'button_save',
            'button_cancel',
            'text_notice',
            'retailcrm_url',
            'retailcrm_apikey',
            'retailcrm_base_settings',
            'retailcrm_dict_settings',
            'retailcrm_dict_delivery',
            'retailcrm_dict_status',
            'retailcrm_dict_payment',
        );

        foreach ($text_strings as $text) {
            $this->data[$text] = $this->language->get($text);
        }

        $this->data['retailcrm_errors'] = array();
        $this->data['saved_settings'] = $this->model_setting_setting
            ->getSetting('retailcrm');

        if (
            !empty($this->data['saved_settings']['retailcrm_url'])
            &&
            !empty($this->data['saved_settings']['retailcrm_apikey'])
        ) {

            $this->retailcrm = new ApiHelper(
                $this->data['saved_settings']['retailcrm_url'],
                $this->data['saved_settings']['retailcrm_apikey']
            );

            $this->data['delivery'] = $this->model_retailcrm_references
                ->getDeliveryTypes();
            $this->data['statuses'] = $this->model_retailcrm_references
                ->getOrderStatuses();
            $this->data['payments'] = $this->model_retailcrm_references
                ->getPaymentTypes();

        }

        $config_data = array(
            'retailcrm_status'
        );

        foreach ($config_data as $conf) {
            if (isset($this->request->post[$conf])) {
                $this->data[$conf] = $this->request->post[$conf];
            } else {
                $this->data[$conf] = $this->config->get($conf);
            }
        }

        if (isset($this->error['warning'])) {
            $this->data['error_warning'] = $this->error['warning'];
        } else {
            $this->data['error_warning'] = '';
        }

        $this->data['breadcrumbs'] = array();

        $this->data['breadcrumbs'][] = array(
            'text'      => $this->language->get('text_home'),
            'href'      => $this->url->link(
                'common/home',
                'token=' . $this->session->data['token'], 'SSL'
            ),
            'separator' => false
        );

        $this->data['breadcrumbs'][] = array(
            'text'      => $this->language->get('text_module'),
            'href'      => $this->url->link(
                'extension/module',
                'token=' . $this->session->data['token'], 'SSL'
            ),
            'separator' => ' :: '
        );

        $this->data['breadcrumbs'][] = array(
            'text'      => $this->language->get('heading_title'),
            'href'      => $this->url->link(
                'module/retailcrm',
                'token=' . $this->session->data['token'], 'SSL'
            ),
            'separator' => ' :: '
        );

        $this->data['action'] = $this->url->link(
            'module/retailcrm',
            'token=' . $this->session->data['token'], 'SSL'
        );

        $this->data['cancel'] = $this->url->link(
            'extension/module',
            'token=' . $this->session->data['token'], 'SSL'
        );


        $this->data['modules'] = array();

        if (isset($this->request->post['retailcrm_module'])) {
            $this->data['modules'] = $this->request->post['retailcrm_module'];
        } elseif ($this->config->get('retailcrm_module')) {
            $this->data['modules'] = $this->config->get('retailcrm_module');
        }

        $this->load->model('design/layout');

        $this->data['layouts'] = $this->model_design_layout->getLayouts();

        $this->template = 'module/retailcrm.tpl';
        $this->children = array(
            'common/header',
            'common/footer',
        );

        $this->response->setOutput($this->render());
    }

    public function history()
    {
        if (file_exists(DIR_APPLICATION . 'model/retailcrm/custom/history')) {
            $this->load->model('retailcrm/custom/history');
            $this->model_retailcrm_custom_history->request();
        } else {
            $this->load->model('retailcrm/history');
            $this->model_retailcrm_history->request();
        }
    }

    public function icml()
    {
        if (file_exists(DIR_APPLICATION . 'model/retailcrm/custom/icml')) {
            $this->load->model('retailcrm/custom/icml');
            $this->model_retailcrm_custom_icml->generateICML();
        } else {
            $this->load->model('retailcrm/icml');
            $this->model_retailcrm_icml->generateICML();
        }
    }

    private function validate()
    {
        if (!$this->user->hasPermission('modify', 'module/retailcrm')) {
            $this->error['warning'] = $this->language->get('error_permission');
        }

        if (!$this->error) {
            return TRUE;
        } else {
            return FALSE;
        }
    }
}