Create WP Nav Menu Programmatically from API Data and Auto Update

/**
 * Create Programmatically WP nav menu from API
 *
 * 1. First retrieve data from url
 * 2. Then Clean nav menu items if already have any
 * 3. Add nav menu items dynamically by using wp_update_nav_menu_item()
 *
 * @package    binAmmer
 * @author     mlimon
 */
class binAmeerNavMenu {

	/**
     * The API url
     *
     * @var string
     */
    public $data_url = 'https://api.binameer.com/v1/visa/freevisacountry?reqtype=menu&fbclid=IwAR3IcMqhVKj1Ng3694CqmvlnHvMQJYN6hQMV-ZtsvDFjL7gInwn6smVT68g';


    /**
     * The nav menu title 
     *
     * @var string
     */
    public $menu_name = 'Menu';


    /**
     * The nav menu id
     *
     * @var int
     */
    public $menu_id = null;


    /**
     * The nav menu item term_id
     * The nav menu item where you want to fetch all item from API   
     * ( Required )
     *
     * @var string
     */
    public $menu_item_id = 11;


    /**
     * The page id
     *
     * @var int
     */
    public $page_id = 2;


    /**
	 * Constructor
	 */
	public function __construct() 
	{
		$main_menu 	= get_term_by( 'name', $this->menu_name, 'nav_menu' );
		$this->menu_id = $main_menu->term_id;

		add_action('init', array($this, 'cleanItems'));
		add_action('wp_loaded', array($this, 'createItems'));
		add_filter('the_content', array($this, 'modifyContent'));
	}


    /**
    * returns retrieve data
    *
    * @link https://developer.wordpress.org/reference/functions/wp_remote_get/
 	* @link https://codex.wordpress.org/Function_API/wp_remote_retrieve_body
 	*
    * @param  string  return data type
    * @access private
    */
    private function retrieveData($type = "")
    {
    	$request = wp_remote_get( $this->data_url );

    	if( is_wp_error( $request ) )
			return false;

		$body = wp_remote_retrieve_body( $request );
		$get_data = json_decode( $body, true );

		$get_arr = array();

		foreach( $get_data['data']['attributes'] as $id ) {
			$get_arr[] = $id['cntr_name'];
		}

		if( $type == "sanitize" )
			return $get_arr;
		else 
			return $get_data;

    }

    /**
    * Clean the nav menu item childs if exists
    *
    * @link https://developer.wordpress.org/reference/functions/wp_get_nav_menu_items/
    * @link https://codex.wordpress.org/Function_Reference/wp_delete_post
    *
    * @access public
    */
    public function cleanItems()
    {
    	$get_arr = $this->retrieveData("sanitize");

		if( empty( $get_arr ) )
			return false;

		$menu_obj    = wp_get_nav_menu_items( $this->menu_id );

		$get_menu_obj = array();

		foreach( $menu_obj as $item ) {
			if( $item->menu_item_parent == $this->menu_item_id ) {
				$get_menu_obj[] = $item->ID;
			}
		}

		if( !is_array( $get_menu_obj ) || empty($get_menu_obj) )
			return false;

		foreach( (array)$get_menu_obj as $ob_item ) {
			wp_delete_post( $ob_item, true );
		}
    }


    /**
    * Create nav item into specific nav menu item
    *
    * @link https://developer.wordpress.org/reference/functions/wp_update_nav_menu_item/
    *
    * @access public
    */
    public function createItems()
    {

    	$fetch_data = $this->retrieveData();

		if( 
			!isset($fetch_data['data']['attributes']) 
			|| empty($fetch_data['data']['attributes']) 
		) 
		{
			return false;
		}

		$item_url = home_url( '/' );

		//then add item into newly-created menu
		foreach( (array)$fetch_data['data']['attributes'] as $item ) {
			if( isset( $this->page_id ) && !empty( $this->page_id ) ) {
				$item_url = get_permalink( $this->page_id ) . "?cntr_code=".$item['cntr_code'];
			}
			wp_update_nav_menu_item($this->menu_id, 0, array(
			'menu-item-title' =>  __($item['cntr_name']),
			'menu-item-classes' => 'cm-item-' . $item['cntr_code'],
			'menu-item-url' => $item_url,
			'menu-item-parent-id' => $this->menu_item_id,
			'menu-item-status' => 'publish'));
		}
    }

    /**
    * the_content filtering
    *
    * @link https://codex.wordpress.org/Plugin_API/Filter_Reference/the_content
    *
    * @access public
    */
    public function modifyContent($content)
    {
    	if( 
    		is_page() && 
    		is_page( $this->page_id ) && 
    		isset( $_GET['cntr_code'] ) && 
    		!empty( $_GET['cntr_code'] ) 
    	) 
		{
			// run your condition here then store data
			$data = "holla Man how are you?";
			if( !empty( $data ) && $data !== FALSE ) {
				$content = $data;
			}
		}
		return $content;
    }
}
$the_nav = new binAmeerNavMenu();