woocommerce/plugins/woocommerce-blocks/assets/js/hocs/with-product.js

/**
 * External dependencies
 */
import { Component } from '@wordpress/element';
import { createHigherOrderComponent } from '@wordpress/compose';

/**
 * Internal dependencies
 */
import { getProduct } from '../components/utils';
import { formatError } from '../base/utils/errors.js';

const withProduct = createHigherOrderComponent( ( OriginalComponent ) => {
	return class WrappedComponent extends Component {
		constructor() {
			super( ...arguments );
			this.state = {
				error: null,
				loading: false,
				product: null,
			};
			this.loadProduct = this.loadProduct.bind( this );
		}

		componentDidMount() {
			this.loadProduct();
		}

		componentDidUpdate( prevProps ) {
			if (
				prevProps.attributes.productId !==
				this.props.attributes.productId
			) {
				this.loadProduct();
			}
		}

		loadProduct() {
			const { productId } = this.props.attributes;

			if ( ! productId ) {
				this.setState( { product: null, loading: false, error: null } );
				return;
			}

			this.setState( { loading: true } );

			getProduct( productId )
				.then( ( product ) => {
					this.setState( { product, loading: false, error: null } );
				} )
				.catch( async ( e ) => {
					const error = await formatError( e );

					this.setState( { product: null, loading: false, error } );
				} );
		}

		render() {
			const { error, loading, product } = this.state;

			return (
				<OriginalComponent
					{ ...this.props }
					error={ error }
					getProduct={ this.loadProduct }
					isLoading={ loading }
					product={ product }
				/>
			);
		}
	};
}, 'withProduct' );

export default withProduct;