Opencart Api' de ÜRün Özelliklerini Nasıl Gösterebilirim ?

MErhabalar,
Opencart api ile ürünlerin api olarak çıktısını alıyorum ancak ürün özelliklerini o sayfaya nasıl ekleyebilirim ?

<?php
class ControllerApiProduct extends Controller
{
    public function index()
    {
        $this->load->language('api/cart');
        $this->load->model('catalog/product');
        $this->load->model('tool/image');
        $json = array();
        $json['products'] = array();
        $filter_data = array();
        $results = $this->model_catalog_product->getProducts($filter_data);
        foreach ($results as $result) {
            if ($result['image']) {
                $image = $this->model_tool_image->resize($result['image'], $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_width'), $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_height'));
            } else {
                $image = $this->model_tool_image->resize('placeholder.png', $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_width'), $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_height'));
            }
            if ($this->customer->isLogged() || !$this->config->get('config_customer_price')) {
                $price = $this->currency->format($this->tax->calculate($result['price'], $result['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency']);
            } else {
                $price = false;
            }
            if ((float) $result['special']) {
                $special = $this->currency->format($this->tax->calculate($result['special'], $result['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency']);
            } else {
                $special = false;
            }
            if ($this->config->get('config_tax')) {
                $tax = $this->currency->format((float) $result['special'] ? $result['special'] : $result['price'], $this->session->data['currency']);
            } else {
                $tax = false;
            }
            if ($this->config->get('config_review_status')) {
                $rating = (int) $result['rating'];
            } else {
                $rating = false;
            }
            $data['products'][] = array(
                'product_id' => $result['product_id'],
                'thumb' => $image,
                'name' => $result['name'],
                'description' => utf8_substr(trim(strip_tags(html_entity_decode($result['description'], ENT_QUOTES, 'UTF-8'))), 0, $this->config->get('theme_' . $this->config->get('config_theme') . '_product_description_length')) . '..',
                'price' => $price,
                'special' => $special,
                'tax' => $tax,
                'minimum' => $result['minimum'] > 0 ? $result['minimum'] : 1,
                'rating' => $result['rating'],
                'href' => $this->url->link('product/product', 'product_id=' . $result['product_id']),
            );
        }
        $json['products'] = $data['products'];
        $this->response->addHeader('Content-Type: application/json');
        $this->response->setOutput(json_encode($json));
    }
}

Şu an bu kodu kullanıyorum çıktı sayfası için
Renk, ölçü vb. bilgileri buraya nasıl yazdırabilirim ?

<?php
class ControllerApiProduct extends Controller
{
public function index()
{
$this->load->language('api/cart');
$this->load->model('catalog/product');
$this->load->model('tool/image');
$json = array();
$json['products'] = array();
$filter_data = array();
$results = $this->model_catalog_product->getProducts($filter_data);
foreach ($results as $result) {
if ($result['image']) {
$image = $this->model_tool_image->resize($result['image'], $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_width'), $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_height'));
} else {
$image = $this->model_tool_image->resize('placeholder.png', $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_width'), $this->config->get('theme_' . $this->config->get('config_theme') . '_image_product_height'));
}
if ($this->customer->isLogged() || !$this->config->get('config_customer_price')) {
$price = $this->currency->format($this->tax->calculate($result['price'], $result['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency']);
} else {
$price = false;
}
if ((float) $result['special']) {
$special = $this->currency->format($this->tax->calculate($result['special'], $result['tax_class_id'], $this->config->get('config_tax')), $this->session->data['currency']);
} else {
$special = false;
}
if ($this->config->get('config_tax')) {
$tax = $this->currency->format((float) $result['special'] ? $result['special'] : $result['price'], $this->session->data['currency']);
} else {
$tax = false;
}
if ($this->config->get('config_review_status')) {
$rating = (int) $result['rating'];
} else {
$rating = false;
}


            $data['options'] = array();

            foreach ($this->model_catalog_product->getProductOptions($result['product_id']) as $option) {
                $product_option_value_data = array();

                foreach ($option['product_option_value'] as $option_value) {
                    
                    if (!$option_value['subtract'] || ($option_value['quantity'] > 0)) {
                        if ((($this->config->get('config_customer_price') && $this->customer->isLogged()) || !$this->config->get('config_customer_price')) && (float)$option_value['price']) {
                            $price = $this->currency->format($this->tax->calculate($option_value['price'], $product_info['tax_class_id'], $this->config->get('config_tax') ? 'P' : false), $this->session->data['currency']);
                        } else {
                            $price = false;
                        }

                        $product_option_value_data[] = array(
                            'product_option_value_id' => $option_value['product_option_value_id'],
                            'option_value_id' => $option_value['option_value_id'],
                            'name' => $option_value['name'],
                            'image' => $this->model_tool_image->resize($option_value['image'], 50, 50),
                            'price' => $price,
                            'price_prefix' => $option_value['price_prefix']
                        );
                    }
                }

                $data['options'][] = array(
                    'product_option_id' => $option['product_option_id'],
                    'product_option_value' => $product_option_value_data,
                    'option_id' => $option['option_id'],
                    'name' => $option['name'],
                    'type' => $option['type'],
                    'value' => $option['value'],
                    'required' => $option['required']
                );
            }


$data['products'][] = array(
'product_id' => $result['product_id'],
'products_option' => $data['options'],//yeni eklenen
'thumb' => $image,
'name' => $result['name'],
'description' => utf8_substr(trim(strip_tags(html_entity_decode($result['description'], ENT_QUOTES, 'UTF-8'))), 0, $this->config->get('theme_' . $this->config->get('config_theme') . '_product_description_length')) . '..',
'price' => $price,
'special' => $special,
'tax' => $tax,
'minimum' => $result['minimum'] > 0 ? $result['minimum'] : 1,
'rating' => $result['rating'],
'href' => $this->url->link('product/product', 'product_id=' . $result['product_id']),
);
}
$json['products'] = $data['products'];
$this->response->addHeader('Content-Type: application/json');
$this->response->setOutput(json_encode($json));
}
}