53 lines
1.6 KiB
TypeScript
53 lines
1.6 KiB
TypeScript
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import { useAppSelector } from 'soapbox/hooks';
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import type { EntitiesPath } from './hooks/types';
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import type { Entity, EntityListState } from './types';
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import type { RootState } from 'soapbox/store';
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/** Get cache at path from Redux. */
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const selectCache = (state: RootState, path: EntitiesPath) => state.entities[path[0]];
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/** Get list at path from Redux. */
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const selectList = (state: RootState, path: EntitiesPath) => {
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const [, ...listKeys] = path;
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const listKey = listKeys.join(':');
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return selectCache(state, path)?.lists[listKey];
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};
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/** Select a particular item from a list state. */
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function selectListState<K extends keyof EntityListState>(state: RootState, path: EntitiesPath, key: K) {
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const listState = selectList(state, path)?.state;
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return listState ? listState[key] : undefined;
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}
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/** Hook to get a particular item from a list state. */
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function useListState<K extends keyof EntityListState>(path: EntitiesPath, key: K) {
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return useAppSelector(state => selectListState(state, path, key));
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}
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/** Get list of entities from Redux. */
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function selectEntities<TEntity extends Entity>(state: RootState, path: EntitiesPath): readonly TEntity[] {
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const cache = selectCache(state, path);
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const list = selectList(state, path);
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const entityIds = list?.ids;
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return entityIds ? (
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Array.from(entityIds).reduce<TEntity[]>((result, id) => {
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const entity = cache?.store[id];
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if (entity) {
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result.push(entity as TEntity);
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}
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return result;
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}, [])
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) : [];
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}
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export {
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selectCache,
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selectList,
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selectListState,
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useListState,
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selectEntities,
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};
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