woocommerce/plugins/woocommerce-blocks/assets/js/data/cart/resolvers.js

/**
 * External dependencies
 */
import { select, apiFetch } from '@wordpress/data-controls';

/**
 * Internal dependencies
 */
import { receiveCart, receiveError } from './actions';
import { STORE_KEY, CART_API_ERROR } from './constants';

/**
 * Resolver for retrieving all cart data.
 */
export function* getCartData() {
	const cartData = yield apiFetch( {
		path: '/wc/store/cart',
		method: 'GET',
		cache: 'no-store',
	} );

	if ( ! cartData ) {
		yield receiveError( CART_API_ERROR );
		return;
	}

	yield receiveCart( cartData );
}

/**
 * Resolver for retrieving cart totals.
 */
export function* getCartTotals() {
	yield select( STORE_KEY, 'getCartData' );
}