52 lines
1.3 KiB
TypeScript
52 lines
1.3 KiB
TypeScript
import type { Ref } from 'vue';
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import { watch, ref } from 'vue';
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import type { Key, GetRowKey } from '../interface';
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interface MapCache<RecordType> {
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kvMap?: Map<Key, RecordType>;
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}
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export default function useLazyKVMap<RecordType>(
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dataRef: Ref<readonly RecordType[]>,
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childrenColumnNameRef: Ref<string>,
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getRowKeyRef: Ref<GetRowKey<RecordType>>,
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) {
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const mapCacheRef = ref<MapCache<RecordType>>({});
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watch(
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[dataRef, childrenColumnNameRef, getRowKeyRef],
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() => {
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const kvMap = new Map<Key, RecordType>();
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const getRowKey = getRowKeyRef.value;
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const childrenColumnName = childrenColumnNameRef.value;
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/* eslint-disable no-inner-declarations */
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function dig(records: readonly RecordType[]) {
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records.forEach((record, index) => {
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const rowKey = getRowKey(record, index);
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kvMap.set(rowKey, record);
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if (record && typeof record === 'object' && childrenColumnName in record) {
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dig((record as any)[childrenColumnName] || []);
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}
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});
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}
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/* eslint-enable */
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dig(dataRef.value);
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mapCacheRef.value = {
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kvMap,
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};
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},
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{
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deep: false,
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immediate: true,
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},
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);
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function getRecordByKey(key: Key): RecordType {
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return mapCacheRef.value.kvMap!.get(key)!;
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}
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return [getRecordByKey];
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}
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