2.0.x-2.2.x/upload/catalog/model/module/facebook_business.php [250:1071]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
            $this->db->query("UPDATE " . DB_PREFIX . "user_group SET permission = '" . $this->db->escape(json_encode($data)) . "' WHERE user_group_id = '" . (int)$user_group_id . "'");
        }
    }

    public function isExtensionInstalled() {
        $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "extension WHERE `type` = 'module' AND `code` = 'facebook_business'");

        if ($query->num_rows) {
            return true;
        } else {
            return false;
        }
    }


    public function getAgentParameters() {
        $plugin_agent_name = 'exopencart';
        $opencart_version = VERSION;
        $plugin_version = $this->getPluginVersion();
    
        $agent_string = sprintf('%s-%s-%s', $plugin_agent_name, $opencart_version, $plugin_version);

        $facebook_pixel_params = array('agent' => $agent_string);

        return json_encode($facebook_pixel_params, JSON_PRETTY_PRINT | JSON_FORCE_OBJECT);
    }

    public function getPii() {
        $facebook_pixel_pii = array();

        if ($this->config->get('facebook_pixel_use_pii')) {
            if ($this->customer->isLogged()) {
                $customer_id = $this->customer->getId();
                $email = $this->customer->getEmail();
                $firstname = $this->customer->getFirstName();
                $lastname = $this->customer->getLastName();
                $telephone = $this->customer->getTelephone();
            } elseif (isset($this->session->data['guest'])) {
                $customer_id = '';
                $email = isset($this->session->data['guest']['email']) ? $this->session->data['guest']['email'] : '';
                $firstname = isset($this->session->data['guest']['firstname']) ? $this->session->data['guest']['firstname'] : '';
                $lastname = isset($this->session->data['guest']['lastname']) ? $this->session->data['guest']['lastname'] : '';
                $telephone = isset($this->session->data['guest']['telephone']) ? $this->session->data['guest']['telephone'] : '';
            } else {
                $customer_id = '';
                $email = '';
                $firstname = '';
                $lastname = '';
                $telephone = '';
            }

            $enabled_aam_fields = explode(',', $this->config->get('facebook_pixel_enabled_aam_fields'));

            if ($enabled_aam_fields) {
                if ($email && in_array('em', $enabled_aam_fields)) {
                    $facebook_pixel_pii['em'] = htmlspecialchars($email, ENT_QUOTES, 'UTF-8');;
                }

                if ($firstname && in_array('fn', $enabled_aam_fields)) {
                    $facebook_pixel_pii['fn'] = htmlspecialchars($firstname, ENT_QUOTES, 'UTF-8');
                }

                if ($lastname && in_array('ln', $enabled_aam_fields)) {
                    $facebook_pixel_pii['ln'] = htmlspecialchars($lastname, ENT_QUOTES, 'UTF-8');
                }

                if ($telephone && in_array('ph', $enabled_aam_fields)) {
                    $facebook_pixel_pii['ph'] = htmlspecialchars($telephone, ENT_QUOTES, 'UTF-8');
                }

                if ($customer_id && in_array('external_id', $enabled_aam_fields)) {
                    $facebook_pixel_pii['external_id'] = (string)$customer_id;
                }
            }
        }

        return $facebook_pixel_pii;
    }

    public function getEventParameters() {
        $route = (array_key_exists('route', $this->request->get)) ? $this->request->get['route'] : null;
    
        $facebook_pixel_event_params = null;
    
        // This grabs events stored on redirects
        if (array_key_exists('facebook_pixel_event_params', $this->session->data)) {
            $facebook_pixel_event_params = $this->session->data['facebook_pixel_event_params'];
        }

        $event_name = 'ViewContent';
        $event_id = $this->generateEventId();
    
        // Checking route and handling the events fired accordingly
        switch ($route) {
            case 'checkout/success':
                $event_name = 'Purchase';

                $this->load->language('checkout/success');

                $contents = array();
                $content_ids = array();
                $value = 0;
                $num_items = 0;
                $currency = $this->session->data['currency'];

                if (isset($this->session->data['facebook_business_order_id'])) {
                    $order_id = $this->session->data['facebook_business_order_id'];
                    unset($this->session->data['facebook_business_order_id']);

                    $this->load->model('checkout/order');
                    $this->load->model('account/order');

                    $order_info = $this->model_checkout_order->getOrder($order_id);

                    if ($order_info) {
                        $order_products = $this->model_account_order->getOrderProducts($order_id);

                        foreach ($order_products as $product) {
                            $content_ids[] = (string)$product['product_id'];
                            $num_items += $product['quantity'];
                            $contents[] = array(
                                'id'       => $product['product_id'],
                                'quantity' => $product['quantity']
                            );
                        }

                        $value = $this->currency->format($order_info['total'], $order_info['currency_code'], $order_info['currency_value'], false);
                        $currency = $order_info['currency_code'];
                    }
                } 

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($currency),
                    'num_items'     => $num_items,
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;

            case 'product/product':
                $event_name = 'ViewContent';

                $this->load->model('catalog/product');

                $product_id = isset($this->request->get['product_id']) ? (int)$this->request->get['product_id'] : 0;

                $product_info = $this->model_catalog_product->getProduct($product_id);

                if ($product_info) {
                    if ((float)$product_info['special']) {
                        $price = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    } else {
                        $price = $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    }

                    $facebook_pixel_event_params = array(
                        'event_name'       => $event_name,
                        'content_ids'      => array((string)$product_id),
                        'content_name'     => $this->formatString($product_info['name']),
                        'content_type'     => 'product',
                        'currency'         => strtoupper($this->session->data['currency']),
                        'value'            => $price,
                        'event_id'         => $event_id
                    );
                }

                break;

            case 'checkout/cart':
                $event_name = 'AddToCart';

                $this->load->language('checkout/cart');

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($this->cart->getProducts() as $product) {
                    $content_ids[] = (string)$product['product_id'];
                    $value += $this->currency->format($this->tax->calculate($product['total'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    $num_items += $product['quantity'];
                    $contents[] = array(
                        'id'       => $product['product_id'],
                        'quantity' => $product['quantity']
                    );
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;

            case 'account/order/reorder':
                $event_name = 'AddToCart';

                if (isset($this->request->get['order_id'])) {
                    $order_id = $this->request->get['order_id'];
                } else {
                    $order_id = 0;
                }

                $this->load->model('account/order');

                $order_info = $this->model_account_order->getOrder($order_id);

                if ($order_info) {
                    if (isset($this->request->get['order_product_id'])) {
                        $order_product_id = $this->request->get['order_product_id'];
                    } else {
                        $order_product_id = 0;
                    }
              
                    $order_product_info = $this->model_account_order->getOrderProduct($order_id, $order_product_id);

                    if ($order_product_info) {
                        $this->load->model('catalog/product');
                
                        $product_info = $this->model_catalog_product->getProduct($order_product_info['product_id']);
                
                        if ($product_info) {
                            if ((float)$product_info['special']) {
                                $price = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            } else {
                                $price = $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            }

                            $price = $price * $order_product_info['quantity'];

                            $contents = array(
                                'id'       => $product_info['product_id'],
                                'quantity' => $order_product_info['quantity']
                            );

                            $facebook_pixel_event_params = array(
                                'event_name'    => $event_name,
                                'content_ids'   => array((string)$product_info['product_id']),
                                'content_name'  => $this->formatString($product_info['name']),
                                'content_type'  => 'product',
                                'contents'      => $contents,
                                'currency'      => strtoupper($this->session->data['currency']),
                                'value'         => $this->currency->format($this->tax->calculate($price, $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false),
                                'event_id'      => $event_id
                            );
                        }
                    }
                }

                break;

            case 'checkout/checkout':
                $event_name = 'InitiateCheckout';

                $this->load->language('checkout/checkout');

                $contents = array();
                $content_ids = array();
                $value = 0;
                $num_items = 0;

                foreach ($this->cart->getProducts() as $product) {
                    $content_ids[] = (string)$product['product_id'];
                    $value += $this->currency->format($this->tax->calculate($product['total'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    $num_items += $product['quantity'];
                    $contents[] = array(
                        'id'       => $product['product_id'],
                        'quantity' => $product['quantity']
                    );
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_ids'   => $content_ids,
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'num_items'     => $num_items,
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;
    
            case 'product/search':
                $event_name = 'Search';

                $this->load->model('catalog/product');
                $this->load->language('product/search');

                if (isset($this->request->get['search'])) {
                    $search = $this->request->get['search'];
                } else {
                    $search = '';
                }

                if (isset($this->request->get['tag'])) {
                    $tag = $this->request->get['tag'];
                } elseif (isset($this->request->get['search'])) {
                    $tag = $this->request->get['search'];
                } else {
                    $tag = '';
                }

                if (isset($this->request->get['description'])) {
                    $description = $this->request->get['description'];
                } else {
                    $description = '';
                }
            
                if (isset($this->request->get['category_id'])) {
                    $category_id = $this->request->get['category_id'];
                } else {
                    $category_id = 0;
                }
            
                if (isset($this->request->get['sub_category'])) {
                    $sub_category = $this->request->get['sub_category'];
                } else {
                    $sub_category = '';
                }

                $page_filter_data = array(
                    'filter_name'         => $search,
                    'filter_tag'          => $tag,
                    'filter_description'  => $description,
                    'filter_category_id'  => $category_id,
                    'filter_sub_category' => $sub_category
                );

                $filter_data = $this->getFilterData($page_filter_data);

                $products = $this->model_catalog_product->getProducts($filter_data);

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($products as $product) {
                    $content_ids[] = $product['product_id'];

                    if ((float)$product['special']) {
                        $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    } else {
                        $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    }

                    $num_items++;
                    $contents[] = array(
                        'id'        => $product['product_id'],
                        'quantity'  => 1
                    );
                }

                if (isset($this->request->get['search'])) {
                    $search_string = $this->request->get['search'];
                } elseif (isset($this->request->get['tag'])) {
                    $search_string = $this->request->get['tag'];
                } else {
                    $search_string = '';
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'search_string' => $search_string,
                    'value'         => $value,
                    'num_items'     => $num_items,
                    'event_id'      => $event_id
                );

                break;

            case 'product/category':
                $event_name = 'ViewCategory';

                $this->load->model('catalog/category');

                if (isset($this->request->get['path'])) {
                    $parts = explode('_', (string)$this->request->get['path']);

                    $category_id = (int)end($parts);
                } else {
                    $category_id = 0;
                }

                $category_info = $this->model_catalog_category->getCategory($category_id);

                if ($category_info) {
                    if (isset($this->request->get['filter'])) {
                        $filter = $this->request->get['filter'];
                    } else {
                        $filter = '';
                    }

                    $page_filter_data = array(
                        'filter_category_id'     => $category_id,
                        'filter_filter'          => $filter,
                    );

                    $filter_data = $this->getFilterData($page_filter_data);

                    $products = $this->model_catalog_product->getProducts($filter_data);

                    $contents = array();
                    $content_ids = array();
                    $value = 0.0;
                    $num_items = 0;
    
                    foreach ($products as $product) {
                        $content_ids[] = $product['product_id'];
    
                        if ((float)$product['special']) {
                            $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        } else {
                            $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        }
    
                        $num_items++;
                        $contents[] = array(
                            'id'       => $product['product_id'],
                            'quantity' => 1,
                        );
                    }

                    $facebook_pixel_event_params = array(
                        'event_name'        => $event_name,
                        'content_name'      => $this->formatString($category_info['name']),
                        'content_category'  => $this->formatString($category_info['name']),
                        'content_ids'       => $content_ids,
                        'content_type'      => 'product',
                        'contents'          => $contents,
                        'currency'          => strtoupper($this->session->data['currency']),
                        'value'             => $value,
                        'num_items'         => $num_items,
                        'event_id'          => $event_id
                    );
                } else {
                    $facebook_pixel_event_params = array(
                        'event_name'        => $event_name,
                        'event_id'          => $event_id
                    );
                }
              
                break;

            case 'account/wishlist':
                $event_name = 'AddToWishlist';

                $this->load->language('account/wishlist');

                if (version_compare(VERSION, '2.0.3.1') <= 0) {
                    if (isset($this->session->data['wishlist'])) {
                        $wishlist = array_map(
                            function($product_id) {
                                return array('product_id' => $product_id);
                            },
                            $this->session->data['wishlist']
                        );
                    } else {
                        $wishlist = array();
                    }
                } else {
                    $this->load->model('account/wishlist');

                    $wishlist = $this->model_account_wishlist->getWishlist();
                }

                $this->load->model('catalog/product');

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($wishlist as $data) {
                    $product_info = $this->model_catalog_product->getProduct($data['product_id']);

                    if ($product_info) {
                        $content_ids[] = $product_info['product_id'];
                        
                        if ((float)$product_info['special']) {
                            $value += $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        } else {
                            $value += $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        }

                        $num_items++;

                        $contents[] = array(
                            'id'       => $product_info['product_id'],
                            'quantity' => 1
                        );
                    }
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_ids'   => $content_ids,
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'value'         => $value,
                    'num_items'     => $num_items,
                    'event_id'      => $event_id
                );

                break;

            case 'account/success':
                $event_name = 'CompleteRegistration';

                if ($this->customer->isLogged()) {
                    $this->language->load('account/success');

                    $facebook_pixel_event_params = array(
                        'event_name'        => $event_name,
                        'content_name'      => $this->formatString($this->language->get('heading_title')),
                        'currency'          => strtoupper($this->session->data['currency']),
                        'status'            => true,
                        'event_id'          => $event_id
                    );
                }

                break;
    
            case 'information/contact/success':
                $event_name = 'Contact';

                $facebook_pixel_event_params = array(
                    'event_name' => $event_name,
                    'event_id'   => $event_id
                );

                break;
            
            case 'product/manufacturer/info':
                $event_name = 'ViewBrand';

                if (isset($this->request->get['manufacturer_id'])) {
                    $manufacturer_id = $this->request->get['manufacturer_id'];
                } else {
                    $manufacturer_id = 0;
                }

                if ($manufacturer_id) {
                    $this->load->model('catalog/manufacturer');

                    $manufacturer_info = $this->model_catalog_manufacturer->getManufacturer($manufacturer_id);

                    if ($manufacturer_info) {
                        $this->load->model('catalog/product');

                        $page_filter_data = array(
                            'filter_manufacturer_id'     => $manufacturer_id
                        );
    
                        $filter_data = $this->getFilterData($page_filter_data);
                        
                        $products = $this->model_catalog_product->getProducts($filter_data);

                        $contents = array();
                        $content_ids = array();
                        $value = 0.0;
                        $num_items = 0;
        
                        foreach ($products as $product) {
                            $content_ids[] = $product['product_id'];
        
                            if ((float)$product['special']) {
                                $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            } else {
                                $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            }
        
                            $num_items++;
                            $contents[] = array(
                                'id'       => $product['product_id'],
                                'quantity' => 1,
                            );
                        }

                        $facebook_pixel_event_params = array(
                            'event_name'        => $event_name,
                            'content_name'      => $this->formatString($manufacturer_info['name']),
                            'content_category'  => $this->formatString($manufacturer_info['name']),
                            'content_ids'       => $content_ids,
                            'content_type'      => 'product',
                            'contents'          => $contents,
                            'currency'          => strtoupper($this->session->data['currency']),
                            'value'             => $value,
                            'num_items'         => $num_items,
                            'event_id'          => $event_id
                        );
                    } else {
                        $facebook_pixel_event_params = array(
                            'event_name'        => $event_name,
                            'event_id'          => $event_id
                        );
                    }
                }

                break;
        }
    
        $this->trackPixel($facebook_pixel_event_params, $event_name, $event_id);

        if ($facebook_pixel_event_params) {
            return addslashes(json_encode($facebook_pixel_event_params));
        } else {
            return $facebook_pixel_event_params;
        }
    }

    private function getPixelAAMSettings($pixel_id) {
        $settings = AdsPixelSettings::buildFromPixelId($pixel_id);

        if ($settings !== null) {
          return $settings->getEnableAutomaticMatching() ? 'true' : 'false';
        }

        return 'false';
    }

    private function getPixelEnabledAAMFields($pixel_id) {
        $settings = AdsPixelSettings::buildFromPixelId($pixel_id);

        if ($settings !== null) {
          $enabled_aam_fileds = $settings->getEnabledAutomaticMatchingFields();
          return implode(',', $enabled_aam_fileds);
        }

        return '';
    }

    public function getPluginVersion() {
        return $this->pluginVersion;
    }

    public function formatString($string) {
        return trim(strip_tags(html_entity_decode(html_entity_decode($string), ENT_QUOTES | ENT_COMPAT, 'UTF-8')));
    }

    private function getFilterData($page_filter_data = array()) {
        if (isset($this->request->get['sort'])) {
            $sort = $this->request->get['sort'];
        } else {
            $sort = 'p.sort_order';
        }

        if (isset($this->request->get['order'])) {
            $order = $this->request->get['order'];
        } else {
            $order = 'ASC';
        }

        if (isset($this->request->get['page'])) {
            $page = (int)$this->request->get['page'];
        } else {
            $page = 1;
        }

        if (isset($this->request->get['limit'])) {
            $limit = (int)$this->request->get['limit'];
        } else {
            $limit = $this->config->get($this->config->get('config_theme') . '_product_limit');
        }

        $general_filter_data = array(
            'sort'                => $sort,
            'order'               => $order,
            'start'               => ($page - 1) * $limit,
            'limit'               => $limit
        );

        if ($page_filter_data) {
            $filter_data = array_merge($page_filter_data, $general_filter_data);
        } else {
            $filter_data = $general_filter_data;
        }

        return $filter_data;
    }

    public function trackPixel($server_event_params, $event_name, $event_id) {
        if (($this->config->get('facebook_business_cookie_bar_status') && (empty($_COOKIE['fb_cookieconsent_status']) || $_COOKIE['fb_cookieconsent_status'] !== 'deny'))
          || $server_event_params == null) {
            return;
        }

        if ($event_name == 'Purchase' && empty($server_event_params['content_ids'])) {
            return;
        }

        if ($this->config->get('facebook_use_s2s')) {
            $user_pii_data = $this->getPii();

            $client_ips = explode(',', Util::getIpAddress());
            $client_ip = $client_ips[0];

            $user_agent = Util::getHttpUserAgent();

            try {
                if (!empty($client_ip) && !empty($user_agent)) {
                    $user_data = (new UserData())
                        ->setClientIpAddress($client_ip)
                        ->setClientUserAgent($user_agent)
                        ->setFbp(Util::getFbp())
                        ->setFbc(Util::getFbc());
                } else {
                    $user_data = (new UserData())
                        ->setFbp(Util::getFbp())
                        ->setFbc(Util::getFbc());
                }

                if ($user_pii_data) {
                    if (!empty($user_pii_data['em'])) {
                        $user_data->setEmail($user_pii_data['em']);
                    }
            
                    if (!empty($user_pii_data['fn'])) {
                        $user_data->setFirstName($user_pii_data['fn']);
                    }
            
                    if (!empty($user_pii_data['ln'])) {
                        $user_data->setLastName($user_pii_data['ln']);
                    }
            
                    if (!empty($user_pii_data['ph'])) {
                        $user_data->setPhone($user_pii_data['ph']);
                    }

                    if (!empty($user_pii_data['external_id'])) {
                        $user_data->setExternalId($user_pii_data['external_id']);
                    }
                }

                $event = (new Event())
                    ->setEventName($event_name)
                    ->setEventTime(time())
                    ->setEventId($event_id)
                    ->setEventSourceUrl(Util::getRequestUri())
                    ->setActionSource(ActionSource::WEBSITE)
                    ->setUserData($user_data)
                    ->setDataProcessingOptions(array())
                    ->setDataProcessingOptionsCountry(0)
                    ->setDataProcessingOptionsState(0)
                    ->setCustomData(new CustomData());

                $custom_data = $event->getCustomData();

                if (!empty($server_event_params['currency'])) {
                    $custom_data->setCurrency($server_event_params['currency']);
                }
          
                if (!empty($server_event_params['value'])) {
                    $custom_data->setValue($server_event_params['value']);
                }
          
                if (!empty($server_event_params['content_ids'])) {
                    $custom_data->setContentIds($server_event_params['content_ids']);
                }
          
                if (!empty($server_event_params['content_type'])) {
                    $custom_data->setContentType($server_event_params['content_type']);
                }
            } catch (Exception $ex) {
                $this->log->write('Facebook Business Extension :: Fail to create server event!');
                return false;
            }

            $api = Api::init(null, null, $this->config->get('facebook_system_user_access_token'), false);

            $agent_data = json_decode($this->getAgentParameters(), true);
            $agent = $agent_data['agent'];

            $async_request = (new EventRequestAsync($this->config->get('facebook_pixel_id')))
                  ->setEvents(array($event))
                  ->setPartnerAgent($agent);

            return $async_request->execute()
                ->then(
                    null,
                    function(\Exception $ex) {
                        // For debugging
                        // $this->log->write('Facebook Business Extension :: Fail to send server event! Error Message: ' . $ex->getMessage());
                    }
                );
        }
    }

    /**
     * Creates a new guid v4 - via https://stackoverflow.com/a/15875555
     * @return string A 36 character string containing dashes.
     */
    public function generateEventId() {
        $data = openssl_random_pseudo_bytes(16);

        $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10

        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



2.3.x-and-above/upload/catalog/model/extension/module/facebook_business.php [266:1086]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
            $this->db->query("UPDATE " . DB_PREFIX . "user_group SET permission = '" . $this->db->escape(json_encode($data)) . "' WHERE user_group_id = '" . (int)$user_group_id . "'");
        }
    }

    public function isExtensionInstalled() {
        $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "extension WHERE `type` = 'module' AND `code` = 'facebook_business'");

        if ($query->num_rows) {
            return true;
        } else {
            return false;
        }
    }

    public function getAgentParameters() {
        $plugin_agent_name = 'exopencart';
        $opencart_version = VERSION;
        $plugin_version = $this->getPluginVersion();
    
        $agent_string = sprintf('%s-%s-%s', $plugin_agent_name, $opencart_version, $plugin_version);

        $facebook_pixel_params = array('agent' => $agent_string);

        return json_encode($facebook_pixel_params, JSON_PRETTY_PRINT | JSON_FORCE_OBJECT);
    }

    public function getPii() {
        $facebook_pixel_pii = array();

        if ($this->config->get('facebook_pixel_use_pii')) {
            if ($this->customer->isLogged()) {
                $customer_id = $this->customer->getId();
                $email = $this->customer->getEmail();
                $firstname = $this->customer->getFirstName();
                $lastname = $this->customer->getLastName();
                $telephone = $this->customer->getTelephone();
            } elseif (isset($this->session->data['guest'])) {
                $customer_id = '';
                $email = isset($this->session->data['guest']['email']) ? $this->session->data['guest']['email'] : '';
                $firstname = isset($this->session->data['guest']['firstname']) ? $this->session->data['guest']['firstname'] : '';
                $lastname = isset($this->session->data['guest']['lastname']) ? $this->session->data['guest']['lastname'] : '';
                $telephone = isset($this->session->data['guest']['telephone']) ? $this->session->data['guest']['telephone'] : '';
            } else {
                $customer_id = '';
                $email = '';
                $firstname = '';
                $lastname = '';
                $telephone = '';
            }

            $enabled_aam_fields = explode(',', $this->config->get('facebook_pixel_enabled_aam_fields'));

            if ($enabled_aam_fields) {
                if ($email && in_array('em', $enabled_aam_fields)) {
                    $facebook_pixel_pii['em'] = htmlspecialchars($email, ENT_QUOTES, 'UTF-8');;
                }

                if ($firstname && in_array('fn', $enabled_aam_fields)) {
                    $facebook_pixel_pii['fn'] = htmlspecialchars($firstname, ENT_QUOTES, 'UTF-8');
                }

                if ($lastname && in_array('ln', $enabled_aam_fields)) {
                    $facebook_pixel_pii['ln'] = htmlspecialchars($lastname, ENT_QUOTES, 'UTF-8');
                }

                if ($telephone && in_array('ph', $enabled_aam_fields)) {
                    $facebook_pixel_pii['ph'] = htmlspecialchars($telephone, ENT_QUOTES, 'UTF-8');
                }

                if ($customer_id && in_array('external_id', $enabled_aam_fields)) {
                    $facebook_pixel_pii['external_id'] = (string)$customer_id;
                }
            }
        }

        return $facebook_pixel_pii;
    }

    public function getEventParameters() {
        $route = (array_key_exists('route', $this->request->get)) ? $this->request->get['route'] : null;
    
        $facebook_pixel_event_params = null;
    
        // This grabs events stored on redirects
        if (array_key_exists('facebook_pixel_event_params', $this->session->data)) {
            $facebook_pixel_event_params = $this->session->data['facebook_pixel_event_params'];
        }

        $event_name = 'ViewContent';
        $event_id = $this->generateEventId();
    
        // Checking route and handling the events fired accordingly
        switch ($route) {
            case 'checkout/success':
                $event_name = 'Purchase';

                $this->load->language('checkout/success');

                $contents = array();
                $content_ids = array();
                $value = 0;
                $num_items = 0;
                $currency = $this->session->data['currency'];

                if (isset($this->session->data['facebook_business_order_id'])) {
                    $order_id = $this->session->data['facebook_business_order_id'];
                    unset($this->session->data['facebook_business_order_id']);

                    $this->load->model('checkout/order');
                    $this->load->model('account/order');

                    $order_info = $this->model_checkout_order->getOrder($order_id);

                    if ($order_info) {
                        $order_products = $this->model_account_order->getOrderProducts($order_id);

                        foreach ($order_products as $product) {
                            $content_ids[] = (string)$product['product_id'];
                            $num_items += $product['quantity'];
                            $contents[] = array(
                                'id'       => $product['product_id'],
                                'quantity' => $product['quantity']
                            );
                        }

                        $value = $this->currency->format($order_info['total'], $order_info['currency_code'], $order_info['currency_value'], false);
                        $currency = $order_info['currency_code'];
                    }
                } 

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($currency),
                    'num_items'     => $num_items,
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;

            case 'product/product':
                $event_name = 'ViewContent';

                $this->load->model('catalog/product');

                $product_id = isset($this->request->get['product_id']) ? (int)$this->request->get['product_id'] : 0;

                $product_info = $this->model_catalog_product->getProduct($product_id);

                if ($product_info) {
                    if ((float)$product_info['special']) {
                        $price = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    } else {
                        $price = $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    }

                    $facebook_pixel_event_params = array(
                        'event_name'       => $event_name,
                        'content_ids'      => array((string)$product_id),
                        'content_name'     => $this->formatString($product_info['name']),
                        'content_type'     => 'product',
                        'currency'         => strtoupper($this->session->data['currency']),
                        'value'            => $price,
                        'event_id'         => $event_id
                    );
                }

                break;

            case 'checkout/cart':
                $event_name = 'AddToCart';

                $this->load->language('checkout/cart');

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($this->cart->getProducts() as $product) {
                    $content_ids[] = (string)$product['product_id'];
                    $value += $this->currency->format($this->tax->calculate($product['total'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    $num_items += $product['quantity'];
                    $contents[] = array(
                        'id'       => $product['product_id'],
                        'quantity' => $product['quantity']
                    );
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;

            case 'account/order/reorder':
                $event_name = 'AddToCart';

                if (isset($this->request->get['order_id'])) {
                    $order_id = $this->request->get['order_id'];
                } else {
                    $order_id = 0;
                }

                $this->load->model('account/order');

                $order_info = $this->model_account_order->getOrder($order_id);

                if ($order_info) {
                    if (isset($this->request->get['order_product_id'])) {
                        $order_product_id = $this->request->get['order_product_id'];
                    } else {
                        $order_product_id = 0;
                    }
              
                    $order_product_info = $this->model_account_order->getOrderProduct($order_id, $order_product_id);

                    if ($order_product_info) {
                        $this->load->model('catalog/product');
                
                        $product_info = $this->model_catalog_product->getProduct($order_product_info['product_id']);
                
                        if ($product_info) {
                            if ((float)$product_info['special']) {
                                $price = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            } else {
                                $price = $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            }

                            $price = $price * $order_product_info['quantity'];

                            $contents = array(
                                'id'       => $product_info['product_id'],
                                'quantity' => $order_product_info['quantity']
                            );

                            $facebook_pixel_event_params = array(
                                'event_name'    => $event_name,
                                'content_ids'   => array((string)$product_info['product_id']),
                                'content_name'  => $this->formatString($product_info['name']),
                                'content_type'  => 'product',
                                'contents'      => $contents,
                                'currency'      => strtoupper($this->session->data['currency']),
                                'value'         => $this->currency->format($this->tax->calculate($price, $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false),
                                'event_id'      => $event_id
                            );
                        }
                    }
                }

                break;

            case 'checkout/checkout':
                $event_name = 'InitiateCheckout';

                $this->load->language('checkout/checkout');

                $contents = array();
                $content_ids = array();
                $value = 0;
                $num_items = 0;

                foreach ($this->cart->getProducts() as $product) {
                    $content_ids[] = (string)$product['product_id'];
                    $value += $this->currency->format($this->tax->calculate($product['total'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    $num_items += $product['quantity'];
                    $contents[] = array(
                        'id'       => $product['product_id'],
                        'quantity' => $product['quantity']
                    );
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_ids'   => $content_ids,
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'num_items'     => $num_items,
                    'value'         => $value,
                    'event_id'      => $event_id
                );

                break;
    
            case 'product/search':
                $event_name = 'Search';

                $this->load->model('catalog/product');
                $this->load->language('product/search');

                if (isset($this->request->get['search'])) {
                    $search = $this->request->get['search'];
                } else {
                    $search = '';
                }

                if (isset($this->request->get['tag'])) {
                    $tag = $this->request->get['tag'];
                } elseif (isset($this->request->get['search'])) {
                    $tag = $this->request->get['search'];
                } else {
                    $tag = '';
                }

                if (isset($this->request->get['description'])) {
                    $description = $this->request->get['description'];
                } else {
                    $description = '';
                }
            
                if (isset($this->request->get['category_id'])) {
                    $category_id = $this->request->get['category_id'];
                } else {
                    $category_id = 0;
                }
            
                if (isset($this->request->get['sub_category'])) {
                    $sub_category = $this->request->get['sub_category'];
                } else {
                    $sub_category = '';
                }

                $page_filter_data = array(
                    'filter_name'         => $search,
                    'filter_tag'          => $tag,
                    'filter_description'  => $description,
                    'filter_category_id'  => $category_id,
                    'filter_sub_category' => $sub_category
                );

                $filter_data = $this->getFilterData($page_filter_data);

                $products = $this->model_catalog_product->getProducts($filter_data);

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($products as $product) {
                    $content_ids[] = $product['product_id'];

                    if ((float)$product['special']) {
                        $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    } else {
                        $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                    }

                    $num_items++;
                    $contents[] = array(
                        'id'        => $product['product_id'],
                        'quantity'  => 1
                    );
                }

                if (isset($this->request->get['search'])) {
                    $search_string = $this->request->get['search'];
                } elseif (isset($this->request->get['tag'])) {
                    $search_string = $this->request->get['tag'];
                } else {
                    $search_string = '';
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_ids'   => $content_ids,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'search_string' => $search_string,
                    'value'         => $value,
                    'num_items'     => $num_items,
                    'event_id'      => $event_id
                );

                break;

            case 'product/category':
                $event_name = 'ViewCategory';

                $this->load->model('catalog/category');

                if (isset($this->request->get['path'])) {
                    $parts = explode('_', (string)$this->request->get['path']);

                    $category_id = (int)end($parts);
                } else {
                    $category_id = 0;
                }

                $category_info = $this->model_catalog_category->getCategory($category_id);

                if ($category_info) {
                    if (isset($this->request->get['filter'])) {
                        $filter = $this->request->get['filter'];
                    } else {
                        $filter = '';
                    }

                    $page_filter_data = array(
                        'filter_category_id'     => $category_id,
                        'filter_filter'          => $filter,
                    );

                    $filter_data = $this->getFilterData($page_filter_data);

                    $products = $this->model_catalog_product->getProducts($filter_data);

                    $contents = array();
                    $content_ids = array();
                    $value = 0.0;
                    $num_items = 0;
    
                    foreach ($products as $product) {
                        $content_ids[] = $product['product_id'];
    
                        if ((float)$product['special']) {
                            $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        } else {
                            $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        }
    
                        $num_items++;
                        $contents[] = array(
                            'id'       => $product['product_id'],
                            'quantity' => 1,
                        );
                    }

                    $facebook_pixel_event_params = array(
                        'event_name'        => $event_name,
                        'content_name'      => $this->formatString($category_info['name']),
                        'content_category'  => $this->formatString($category_info['name']),
                        'content_ids'       => $content_ids,
                        'content_type'      => 'product',
                        'contents'          => $contents,
                        'currency'          => strtoupper($this->session->data['currency']),
                        'value'             => $value,
                        'num_items'         => $num_items,
                        'event_id'          => $event_id
                    );
                } else {
                    $facebook_pixel_event_params = array(
                        'event_name'        => $event_name,
                        'event_id'          => $event_id
                    );
                }
              
                break;

            case 'account/wishlist':
                $event_name = 'AddToWishlist';

                $this->load->language('account/wishlist');

                if (version_compare(VERSION, '2.0.3.1') <= 0) {
                    if (isset($this->session->data['wishlist'])) {
                        $wishlist = array_map(
                            function($product_id) {
                                return array('product_id' => $product_id);
                            },
                            $this->session->data['wishlist']
                        );
                    } else {
                        $wishlist = array();
                    }
                } else {
                    $this->load->model('account/wishlist');

                    $wishlist = $this->model_account_wishlist->getWishlist();
                }

                $this->load->model('catalog/product');

                $contents = array();
                $content_ids = array();
                $value = 0.0;
                $num_items = 0;

                foreach ($wishlist as $data) {
                    $product_info = $this->model_catalog_product->getProduct($data['product_id']);

                    if ($product_info) {
                        $content_ids[] = $product_info['product_id'];
                        
                        if ((float)$product_info['special']) {
                            $value += $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        } else {
                            $value += $this->currency->format($this->tax->calculate($product_info['price'], $product_info['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                        }

                        $num_items++;

                        $contents[] = array(
                            'id'       => $product_info['product_id'],
                            'quantity' => 1
                        );
                    }
                }

                $facebook_pixel_event_params = array(
                    'event_name'    => $event_name,
                    'content_name'  => $this->formatString($this->language->get('heading_title')),
                    'content_ids'   => $content_ids,
                    'content_type'  => 'product',
                    'contents'      => $contents,
                    'currency'      => strtoupper($this->session->data['currency']),
                    'value'         => $value,
                    'num_items'     => $num_items,
                    'event_id'      => $event_id
                );

                break;

            case 'account/success':
                $event_name = 'CompleteRegistration';

                if ($this->customer->isLogged()) {
                    $this->language->load('account/success');

                    $facebook_pixel_event_params = array(
                        'event_name'   => $event_name,
                        'content_name' => $this->formatString($this->language->get('heading_title')),
                        'currency'     => strtoupper($this->session->data['currency']),
                        'status'       => true,
                        'event_id'     => $event_id
                    );
                }

                break;
    
            case 'information/contact/success':
                $event_name = 'Contact';

                $facebook_pixel_event_params = array(
                    'event_name' => $event_name,
                    'event_id'   => $event_id
                );

                break;
            
            case 'product/manufacturer/info':
                $event_name = 'ViewBrand';

                if (isset($this->request->get['manufacturer_id'])) {
                    $manufacturer_id = $this->request->get['manufacturer_id'];
                } else {
                    $manufacturer_id = 0;
                }

                if ($manufacturer_id) {
                    $this->load->model('catalog/manufacturer');

                    $manufacturer_info = $this->model_catalog_manufacturer->getManufacturer($manufacturer_id);

                    if ($manufacturer_info) {
                        $this->load->model('catalog/product');

                        $page_filter_data = array(
                            'filter_manufacturer_id'     => $manufacturer_id
                        );
    
                        $filter_data = $this->getFilterData($page_filter_data);
                        
                        $products = $this->model_catalog_product->getProducts($filter_data);

                        $contents = array();
                        $content_ids = array();
                        $value = 0.0;
                        $num_items = 0;
        
                        foreach ($products as $product) {
                            $content_ids[] = $product['product_id'];
        
                            if ((float)$product['special']) {
                                $value += $this->currency->format($this->tax->calculate($product['special'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            } else {
                                $value += $this->currency->format($this->tax->calculate($product['price'], $product['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency'], '', false);
                            }
        
                            $num_items++;
                            $contents[] = array(
                                'id'       => $product['product_id'],
                                'quantity' => 1,
                            );
                        }

                        $facebook_pixel_event_params = array(
                            'event_name'        => $event_name,
                            'content_name'      => $this->formatString($manufacturer_info['name']),
                            'content_category'  => $this->formatString($manufacturer_info['name']),
                            'content_ids'       => $content_ids,
                            'content_type'      => 'product',
                            'contents'          => $contents,
                            'currency'          => strtoupper($this->session->data['currency']),
                            'value'             => $value,
                            'num_items'         => $num_items,
                            'event_id'          => $event_id
                        );
                    } else {
                        $facebook_pixel_event_params = array(
                            'event_name'        => $event_name,
                            'event_id'          => $event_id
                        );
                    }
                }

                break;
        }
    
        $this->trackPixel($facebook_pixel_event_params, $event_name, $event_id);

        if ($facebook_pixel_event_params) {
            return addslashes(json_encode($facebook_pixel_event_params));
        } else {
            return $facebook_pixel_event_params;
        }
    }

    private function getPixelAAMSettings($pixel_id) {
        $settings = AdsPixelSettings::buildFromPixelId($pixel_id);

        if ($settings !== null) {
          return $settings->getEnableAutomaticMatching() ? 'true' : 'false';
        }

        return 'false';
    }

    private function getPixelEnabledAAMFields($pixel_id) {
        $settings = AdsPixelSettings::buildFromPixelId($pixel_id);

        if ($settings !== null) {
          $enabled_aam_fileds = $settings->getEnabledAutomaticMatchingFields();
          return implode(',', $enabled_aam_fileds);
        }

        return '';
    }

    public function getPluginVersion() {
        return $this->pluginVersion;
    }

    public function formatString($string) {
        return trim(strip_tags(html_entity_decode(html_entity_decode($string), ENT_QUOTES | ENT_COMPAT, 'UTF-8')));
    }

    private function getFilterData($page_filter_data = array()) {
        if (isset($this->request->get['sort'])) {
            $sort = $this->request->get['sort'];
        } else {
            $sort = 'p.sort_order';
        }

        if (isset($this->request->get['order'])) {
            $order = $this->request->get['order'];
        } else {
            $order = 'ASC';
        }

        if (isset($this->request->get['page'])) {
            $page = (int)$this->request->get['page'];
        } else {
            $page = 1;
        }

        if (isset($this->request->get['limit'])) {
            $limit = (int)$this->request->get['limit'];
        } else {
            $limit = $this->config->get($this->config->get('config_theme') . '_product_limit');
        }

        $general_filter_data = array(
            'sort'                => $sort,
            'order'               => $order,
            'start'               => ($page - 1) * $limit,
            'limit'               => $limit
        );

        if ($page_filter_data) {
            $filter_data = array_merge($page_filter_data, $general_filter_data);
        } else {
            $filter_data = $general_filter_data;
        }

        return $filter_data;
    }

    public function trackPixel($server_event_params, $event_name, $event_id) {
        if (($this->config->get('facebook_business_cookie_bar_status') && (empty($_COOKIE['fb_cookieconsent_status']) || $_COOKIE['fb_cookieconsent_status'] !== 'deny'))
          || $server_event_params == null) {
            return;
        }

        if ($event_name == 'Purchase' && empty($server_event_params['content_ids'])) {
            return;
        }

        if ($this->config->get('facebook_use_s2s')) {
            $user_pii_data = $this->getPii();

            $client_ips = explode(',', Util::getIpAddress());
            $client_ip = $client_ips[0];

            $user_agent = Util::getHttpUserAgent();

            try {
                if (!empty($client_ip) && !empty($user_agent)) {
                    $user_data = (new UserData())
                        ->setClientIpAddress($client_ip)
                        ->setClientUserAgent($user_agent)
                        ->setFbp(Util::getFbp())
                        ->setFbc(Util::getFbc());
                } else {
                    $user_data = (new UserData())
                        ->setFbp(Util::getFbp())
                        ->setFbc(Util::getFbc());
                }

                if ($user_pii_data) {
                    if (!empty($user_pii_data['em'])) {
                        $user_data->setEmail($user_pii_data['em']);
                    }
            
                    if (!empty($user_pii_data['fn'])) {
                        $user_data->setFirstName($user_pii_data['fn']);
                    }
            
                    if (!empty($user_pii_data['ln'])) {
                        $user_data->setLastName($user_pii_data['ln']);
                    }
            
                    if (!empty($user_pii_data['ph'])) {
                        $user_data->setPhone($user_pii_data['ph']);
                    }

                    if (!empty($user_pii_data['external_id'])) {
                        $user_data->setExternalId($user_pii_data['external_id']);
                    }
                }

                $event = (new Event())
                    ->setEventName($event_name)
                    ->setEventTime(time())
                    ->setEventId($event_id)
                    ->setEventSourceUrl(Util::getRequestUri())
                    ->setActionSource(ActionSource::WEBSITE)
                    ->setUserData($user_data)
                    ->setDataProcessingOptions(array())
                    ->setDataProcessingOptionsCountry(0)
                    ->setDataProcessingOptionsState(0)
                    ->setCustomData(new CustomData());

                $custom_data = $event->getCustomData();

                if (!empty($server_event_params['currency'])) {
                    $custom_data->setCurrency($server_event_params['currency']);
                }
          
                if (!empty($server_event_params['value'])) {
                    $custom_data->setValue($server_event_params['value']);
                }
          
                if (!empty($server_event_params['content_ids'])) {
                    $custom_data->setContentIds($server_event_params['content_ids']);
                }
          
                if (!empty($server_event_params['content_type'])) {
                    $custom_data->setContentType($server_event_params['content_type']);
                }
            } catch (Exception $ex) {
                $this->log->write('Facebook Business Extension :: Fail to create server event!');
                return false;
            }

            $api = Api::init(null, null, $this->config->get('facebook_system_user_access_token'), false);

            $agent_data = json_decode($this->getAgentParameters(), true);
            $agent = $agent_data['agent'];

            $async_request = (new EventRequestAsync($this->config->get('facebook_pixel_id')))
                  ->setEvents(array($event))
                  ->setPartnerAgent($agent);

            return $async_request->execute()
                ->then(
                    null,
                    function(\Exception $ex) {
                        // For debugging
                        // $this->log->write('Facebook Business Extension :: Fail to send server event! Error Message: ' . $ex->getMessage());
                    }
                );
        }
    }

    /**
     * Creates a new guid v4 - via https://stackoverflow.com/a/15875555
     * @return string A 36 character string containing dashes.
     */
    public function generateEventId() {
        $data = openssl_random_pseudo_bytes(16);

        $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10

        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
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