HTTP requests on every load

stamped_io_product_reviews_new was often empty so a new request was being made on every page load, for multiple products. I’ve added caching to the get_request() function to avoid this:

public static function get_request( $product_id, $product_title, $postfields = array(), $method = 'POST' ) {
	$domainName = self::get_site_url();
	$public_key = self::get_public_keys();

	$baseurl = "https://stamped.io/api/widget?";

	$query_args = array(
		'productId'   => $product_id,
		'apiKey'      => $public_key,
		'storeUrl'    => $domainName,
		'productName' => $product_title,
	);
	
	$transient_name = 'stampedio-'. implode( '-', array_map( 'sanitize_key', $query_args ) );
	$transient_value = get_transient( $transient_name );
	if( !empty( $transient_value ) ) {
		// We're storing the value inside an array key because storing a possibly empty value would not work.
		if( isset( $transient_value['data'] ) ) {
			return (object) $transient_value['data'];
		} else {
			return;
		}
	}

	$url = add_query_arg( $query_args, $baseurl );

	$request = wp_remote_get(
		$url,
		array(
			'timeout'   => 5,
			'sslverify' => false,
			'headers'   => array(
				'authorization' => 'Basic {$baseToken}',
				'cache-control' => 'no-cache',
				'content-type'  => 'application/json',
			),
		)
	);

	if ( is_wp_error( $request ) ) {
		return false; // Bail early
	}

	$body = wp_remote_retrieve_body( $request );

	$data = json_decode( $body );

	$transient_data = array( 'expiration_time' => time() + DAY_IN_SECONDS, 'data' => $data );

	set_transient( $transient_name, $transient_data, DAY_IN_SECONDS );

	if ( ! empty( $data ) ) {
		return $data;
	}
}