110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
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/**
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* External dependencies
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*/
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import { select, dispatch } from '@wordpress/data-controls';
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import { addQueryArgs } from '@wordpress/url';
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/**
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* Internal dependencies
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*/
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import { receiveCollection, receiveCollectionError } from './actions';
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import { STORE_KEY as SCHEMA_STORE_KEY } from '../schema/constants';
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import { STORE_KEY, DEFAULT_EMPTY_ARRAY } from './constants';
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import { apiFetchWithHeaders } from '../shared-controls';
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/**
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* Check if the store needs invalidating due to a change in last modified headers.
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*
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* @param {number} timestamp Last update timestamp.
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*/
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function* invalidateModifiedCollection( timestamp ) {
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const lastModified = yield select( STORE_KEY, 'getCollectionLastModified' );
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if ( ! lastModified ) {
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yield dispatch( STORE_KEY, 'receiveLastModified', timestamp );
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} else if ( timestamp > lastModified ) {
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yield dispatch( STORE_KEY, 'invalidateResolutionForStore' );
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yield dispatch( STORE_KEY, 'receiveLastModified', timestamp );
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}
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}
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/**
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* Resolver for retrieving a collection via a api route.
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*
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* @param {string} namespace
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* @param {string} resourceName
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* @param {Object} query
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* @param {Array} ids
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*/
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export function* getCollection( namespace, resourceName, query, ids ) {
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const route = yield select(
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SCHEMA_STORE_KEY,
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'getRoute',
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namespace,
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resourceName,
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ids
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);
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const queryString = addQueryArgs( '', query );
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if ( ! route ) {
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yield receiveCollection( namespace, resourceName, queryString, ids );
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return;
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}
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try {
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const {
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response = DEFAULT_EMPTY_ARRAY,
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headers,
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} = yield apiFetchWithHeaders( { path: route + queryString } );
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if ( headers && headers.get && headers.has( 'last-modified' ) ) {
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// Do any invalidation before the collection is received to prevent
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// this query running again.
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yield invalidateModifiedCollection(
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parseInt( headers.get( 'last-modified' ), 10 )
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);
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}
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yield receiveCollection( namespace, resourceName, queryString, ids, {
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items: response,
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headers,
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} );
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} catch ( error ) {
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yield receiveCollectionError(
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namespace,
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resourceName,
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queryString,
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ids,
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error
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);
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}
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}
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/**
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* Resolver for retrieving a specific collection header for the given arguments
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*
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* Note: This triggers the `getCollection` resolver if it hasn't been resolved
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* yet.
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*
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* @param {string} header
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* @param {string} namespace
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* @param {string} resourceName
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* @param {Object} query
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* @param {Array} ids
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*/
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export function* getCollectionHeader(
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header,
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namespace,
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resourceName,
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query,
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ids
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) {
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// feed the correct number of args in for the select so we don't resolve
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// unnecessarily. Any undefined args will be excluded. This is important
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// because resolver resolution is cached by both number and value of args.
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const args = [ namespace, resourceName, query, ids ].filter(
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( arg ) => typeof arg !== 'undefined'
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);
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//we call this simply to do any resolution of the collection if necessary.
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yield select( STORE_KEY, 'getCollection', ...args );
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}
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