73 lines
No EOL
1.9 KiB
TypeScript
73 lines
No EOL
1.9 KiB
TypeScript
import produce, { enableMapSet } from 'immer';
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import {
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ENTITIES_IMPORT,
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ENTITIES_FETCH_REQUEST,
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ENTITIES_FETCH_SUCCESS,
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ENTITIES_FETCH_FAIL,
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EntityAction,
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} from './actions';
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import { createCache, createList, updateStore, updateList } from './utils';
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import type { Entity, EntityCache } from './types';
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enableMapSet();
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/** Entity reducer state. */
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type State = Map<string, EntityCache>;
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/** Import entities into the cache. */
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const importEntities = (
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state: Readonly<State>,
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entityType: string,
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entities: Entity[],
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listKey?: string,
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): State => {
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return produce(state, draft => {
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const cache = draft.get(entityType) ?? createCache();
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cache.store = updateStore(cache.store, entities);
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if (listKey) {
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const list = cache.lists.get(listKey) ?? createList();
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cache.lists.set(listKey, updateList(list, entities));
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}
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return draft.set(entityType, cache);
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});
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};
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const setFetching = (
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state: State,
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entityType: string,
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listKey: string | undefined,
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isFetching: boolean,
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) => {
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return produce(state, draft => {
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const cache = draft.get(entityType) ?? createCache();
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if (listKey) {
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const list = cache.lists.get(listKey) ?? createList();
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list.state.fetching = isFetching;
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cache.lists.set(listKey, list);
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}
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return draft.set(entityType, cache);
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});
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};
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/** Stores various entity data and lists in a one reducer. */
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function reducer(state: Readonly<State> = new Map(), action: EntityAction): State {
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switch (action.type) {
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case ENTITIES_IMPORT:
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case ENTITIES_FETCH_SUCCESS:
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return importEntities(state, action.entityType, action.entities, action.listKey);
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case ENTITIES_FETCH_REQUEST:
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return setFetching(state, action.entityType, action.listKey, true);
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case ENTITIES_FETCH_FAIL:
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return setFetching(state, action.entityType, action.listKey, false);
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default:
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return state;
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}
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}
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export default reducer; |