get all products in opencart 3.0 api

product.php

<?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 ) {
			$product_images = $this->model_catalog_product->getProductImages( $result['product_id'] );
			$thumbs         = array();
			if ( $product_images ) {
				foreach ( $product_images as $product_image ) {
					$thumbs[] = $this->model_tool_image->resize( $product_image['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' ) );
				}
			}
			if ( $thumbs ) {
				$thumbs = implode( ',', $thumbs );
			} else {
				$thumbs = '';
			}
			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'],
				'name'        => $result['name'],
				'description' => trim( strip_tags( html_entity_decode( $result['description'], ENT_QUOTES, 'UTF-8' ) ) ),
				'thumb'       => $image,
				'images'      => $thumbs,
				'price'       => $price,
				'tax'         => $tax,
				'minimum'     => $result['minimum'] > 0 ? $result['minimum'] : 1,
				'quantity'    => $result['quantity'],
				'sku'         => $result['sku'],
				'model'       => $result['model'],
				'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 ) );
	}
}

thank you.