ant-design/components/table/hooks/useLazyKVMap.ts

59 lines
1.6 KiB
TypeScript
Raw Normal View History

import * as React from 'react';
import type { AnyObject } from '../../_util/type';
2022-06-22 14:57:09 +08:00
import type { GetRowKey, Key } from '../interface';
interface MapCache<RecordType extends AnyObject = AnyObject> {
data?: readonly RecordType[];
childrenColumnName?: string;
kvMap?: Map<Key, RecordType>;
getRowKey?: (record: RecordType, index: number) => Key;
}
const useLazyKVMap = <RecordType extends AnyObject = AnyObject>(
data: readonly RecordType[],
childrenColumnName: string,
getRowKey: GetRowKey<RecordType>,
) => {
const mapCacheRef = React.useRef<MapCache<RecordType>>({});
function getRecordByKey(key: Key): RecordType {
if (
!mapCacheRef.current ||
mapCacheRef.current.data !== data ||
mapCacheRef.current.childrenColumnName !== childrenColumnName ||
mapCacheRef.current.getRowKey !== getRowKey
) {
const kvMap = new Map<Key, RecordType>();
/* eslint-disable no-inner-declarations */
function dig(records: readonly RecordType[]) {
records.forEach((record, index) => {
const rowKey = getRowKey(record, index);
kvMap.set(rowKey, record);
if (record && typeof record === 'object' && childrenColumnName in record) {
dig((record as any)[childrenColumnName] || []);
}
});
}
/* eslint-enable */
dig(data);
mapCacheRef.current = {
data,
childrenColumnName,
kvMap,
getRowKey,
};
}
return mapCacheRef.current.kvMap?.get(key)!;
}
return [getRecordByKey] as const;
};
export default useLazyKVMap;