84 lines
2.4 KiB
JavaScript
84 lines
2.4 KiB
JavaScript
/**
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* External dependencies
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*/
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import { useSelect, useDispatch } from '@wordpress/data';
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import { useState, useEffect } from '@wordpress/element';
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import { CART_STORE_KEY as storeKey } from '@woocommerce/block-data';
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import { useDebounce } from 'use-debounce';
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/**
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* Internal dependencies
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*/
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import { useStoreCart } from './use-store-cart';
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/**
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* @typedef {import('@woocommerce/type-defs/hooks').StoreCartItemQuantity} StoreCartItemQuantity
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* @typedef {import('@woocommerce/type-defs/cart').CartItem} CartItem
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*/
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/**
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* This is a custom hook for loading the Store API /cart/ endpoint and
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* actions for removing or changing item quantity.
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*
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* @see https://github.com/woocommerce/woocommerce-gutenberg-products-block/tree/master/src/RestApi/StoreApi
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*
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* @param {string} cartItemKey Key for a cart item.
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* @return {StoreCartItemQuantity} An object exposing data and actions relating to cart items.
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*/
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export const useStoreCartItemQuantity = ( cartItemKey ) => {
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const { cartItems, cartIsLoading } = useStoreCart();
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/**
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* @type {[CartItem, function( CartItem ):undefined]}
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*/
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const [ cartItem, setCartItem ] = useState( {
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key: '',
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quantity: 0,
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} );
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// Store quantity in hook state. This is used to keep the UI
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// updated while server request is updated.
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const [ quantity, changeQuantity ] = useState( cartItem.quantity );
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const [ debouncedQuantity ] = useDebounce( quantity, 400 );
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const isPending = useSelect(
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( select ) => {
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const store = select( storeKey );
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return store.isItemQuantityPending( cartItemKey );
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},
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[ cartItemKey ]
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);
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useEffect( () => {
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if ( ! cartIsLoading ) {
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const foundCartItem = cartItems.find(
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( item ) => item.key === cartItemKey
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);
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if ( foundCartItem ) {
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setCartItem( foundCartItem );
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}
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}
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}, [ cartItems, cartIsLoading, cartItemKey ] );
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const { removeItemFromCart, changeCartItemQuantity } = useDispatch(
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storeKey
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);
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const removeItem = () => {
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removeItemFromCart( cartItemKey );
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};
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// Observe debounced quantity value, fire action to update server when it
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// changes.
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useEffect( () => {
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if ( debouncedQuantity === 0 ) {
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changeQuantity( cartItem.quantity );
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return;
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}
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changeCartItemQuantity( cartItemKey, debouncedQuantity );
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}, [ debouncedQuantity, cartItemKey, cartItem.quantity ] );
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return {
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isPending,
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quantity,
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changeQuantity,
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removeItem,
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isLoading: cartIsLoading,
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};
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};
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