74 lines
2.5 KiB
JavaScript
74 lines
2.5 KiB
JavaScript
/**
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* External dependencies
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*/
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import { useDispatch, useSelect } from '@wordpress/data';
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import { useState, useEffect, useMemo } from '@wordpress/element';
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import { CART_STORE_KEY as storeKey } from '@woocommerce/block-data';
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import { useThrowError } from '@woocommerce/base-hooks';
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/**
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* This is a custom hook for loading the selected shipping rate from the cart store and actions for selecting a rate.
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See also: https://github.com/woocommerce/woocommerce-gutenberg-products-block/tree/master/src/RestApi/StoreApi
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*
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* @param {Array} shippingRates an array of packages with shipping rates.
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* @return {Object} This hook will return an object with two properties:
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* - selectShippingRate A function that immediately returns the selected
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* rate and dispatches an action generator.
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* - selectedShippingRates An object of selected shipping rates and package id as key, maintained
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* locally by a state and updated optimistically.
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*/
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export const useSelectShippingRate = ( shippingRates ) => {
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const throwError = useThrowError();
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const derivedSelectedRates = useMemo(
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() =>
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shippingRates
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.map(
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// the API responds with those keys.
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/* eslint-disable camelcase */
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( p ) => [
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p.package_id,
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p.shipping_rates.find( ( rate ) => rate.selected )
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?.rate_id,
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]
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/* eslint-enable */
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)
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// A fromEntries ponyfill, creates an object from an array of arrays.
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.reduce( ( obj, [ key, val ] ) => {
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obj[ key ] = val;
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return obj;
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}, {} ),
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[ shippingRates ]
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);
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const [ selectedShippingRates, setSelectedShipping ] = useState(
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derivedSelectedRates
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);
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// useState initial state is always remembered, so even if that value changes,
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// useState won't update, we're forcing it to update if the initial value changes,
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// useMemo helps us not running this function when we don't need to.
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useEffect( () => {
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setSelectedShipping( derivedSelectedRates );
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}, [ derivedSelectedRates ] );
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const { selectShippingRate } = useDispatch( storeKey );
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const isSelectingRate = useSelect( ( select ) => {
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return select( storeKey ).isShippingRateBeingSelected();
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}, [] );
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const setRate = ( newShippingRate, packageId ) => {
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setSelectedShipping( {
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...selectedShippingRates,
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[ packageId ]: newShippingRate,
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} );
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selectShippingRate( newShippingRate, packageId ).catch( ( error ) => {
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// we throw this error because an error on selecting a rate
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// is problematic.
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throwError( error );
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} );
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};
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return {
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selectShippingRate: setRate,
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selectedShippingRates,
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isSelectingRate,
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};
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};
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