function createCategoriesPagingCachedLoader()

in web/src/shared/components/categories-picker/categories-picker.tsx [26:57]

32 lines of code
5 McCabe index (conditional complexity)


    function createCategoriesPagingCachedLoader<TItem, TId>(
        cache: React.MutableRefObject<PagingCache<TItem>>,
        fetcher: PagingFetcher<TItem>
    ) {
        return useCallback(
            async (request: LazyDataSourceApiRequest<TItem, TId, unknown>) => {
                const { range, search = '' } = request;
                const requestFrom = range?.from || 0;
                const requestCount = range?.count || 0;
                if (search !== cache.current.search) {
                    const response = await fetcher(1, pageSizes._100, search, [], {
                        field: 'name',
                        direction: SortingDirection.ASC
                    });
                    cache.current = { page: 1, cache: response.data, search };
                    return { items: response.data };
                } else {
                    const nextPage = Math.floor((requestFrom + requestCount) / pageSizes._100) + 1;
                    if (nextPage !== cache.current.page) {
                        const response = await fetcher(nextPage, pageSizes._100, search, [], {
                            field: 'name',
                            direction: SortingDirection.ASC
                        });
                        cache.current = { page: nextPage, cache: response.data, search };
                        return { items: response.data };
                    }
                    return { items: cache.current.cache.slice(requestFrom, requestCount) };
                }
            },
            [cache.current]
        );
    }