old-new-wiaas/backend/app/plugins/wiaas/includes/api/class-wiaas-package-api.php

<?php

class Wiaas_Package_API {

    public static function init() {

        add_filter('woocommerce_rest_product_object_query', array(__CLASS__, 'filter_packages'), 10, 2);

        add_filter('rest_dispatch_request', array(__CLASS__, 'validate_package_search_request'), 10, 4);
    }

    public static function register_routes() {
        // do nothing
    }

    public static function validate_package_search_request($null, $request, $route, $handler) {

    	if (strpos($route, '/wc/v2/products') !== false) {

    		if (empty($request['cl_id']) || ! absint($request['cl_id'])) {

				    return new WP_Error(
					    'missing_commercial_lead',
					    'Commercial lead is missing',
					    array ( 'status' => 400 )
				    );
		    }
	    }

	    return null;
    }

	/**
	 * Filter woocommerce REST API query so only valid wiaas packages are returned to the customer
	 *
	 * @param $args
	 * @param $request
	 *
	 * @return mixed
	 */
    public static function filter_packages($args, $request) {

	    if ( empty($query['tax_query']) ){
		    $query['tax_query'] = array();
	    }

	    // Retrieve only packages with available package status
	    $query['tax_query'][] = array(
			    'taxonomy' => 'package_status',
			    'field' => 'name',
			    'terms' => Wiaas_Package_Status::AVAILABLE
	    );


        $commercial_lead_id = absint($request['cl_id']);

        $customer_id = wiaas_get_current_user_organization_id();

        $pay_types = array_keys(Wiaas_Package_Pricing::get_available_pay_types());

        $price_search_terms = array();
        foreach ($pay_types as $pay_type) {
        	$price_search_terms[] = '_' . $commercial_lead_id . '_' . $pay_type . '_default';
	        $price_search_terms[] = '_' . $commercial_lead_id . '_' . $pay_type . '_customer_' . $customer_id;
        }

        $args['tax_query'][] = array(
            'taxonomy'     => '_wiaas_shop_prices',
            'terms'   =>  $price_search_terms,
	        'field' => 'slug'
        );

        return $args;
    }
}

Wiaas_Package_API::init();