Kingkor Roy Tirtho
135 lines
4.1 KiB
Dart
135 lines
4.1 KiB
Dart
// ignore_for_file: invalid_use_of_protected_member
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import 'package:fl_query/fl_query.dart';
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import 'package:fl_query_hooks/src/utils.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
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Query<T, Outside> useQuery<T extends Object, Outside>({
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required QueryJob<T, Outside> job,
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required Outside externalData,
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/// Called when the query returns new data, on query
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/// refetch or query gets expired
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QueryListener<T>? onData,
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/// Called when the query returns error
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QueryListener<dynamic>? onError,
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List<Object?>? keys,
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}) {
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final mounted = useIsMounted();
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final update = useForceUpdate();
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final context = useContext();
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final QueryBowl queryBowl = QueryBowl.of(context);
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final ValueKey<String> uKey = useMemoized(() => ValueKey(uuid.v4()), []);
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final query = useRef(
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useMemoized(
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() => queryBowl.addQuery<T, Outside>(
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job,
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externalData: externalData,
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key: uKey,
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onData: onData,
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onError: onError,
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),
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[],
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),
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);
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final oldJob = usePrevious(job);
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final oldExternalData = usePrevious(externalData);
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final oldOnData = usePrevious(onData);
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final oldOnError = usePrevious(onError);
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final init = useCallback(([T? previousData]) {
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final hasExternalDataChanged = !isShallowEqual(
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query.value.externalData,
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query.value.prevUsedExternalData,
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);
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query.value = queryBowl.addQuery<T, Outside>(
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job,
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externalData: externalData,
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previousData: previousData,
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key: uKey,
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onData: onData,
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onError: onError,
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);
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update();
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if (query.value.fetched && hasExternalDataChanged) {
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query.value.refetch();
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} else if (!query.value.fetched) {
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query.value.fetch();
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}
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}, [queryBowl, query.value, uKey, onData, onError, job, externalData]);
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final disposeQuery = useCallback(() {
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query.value.unmount(uKey);
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if (onData != null) query.value.removeDataListener(onData);
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if (onError != null) query.value.removeErrorListener(onError);
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}, [query.value, onData, onError, uKey]);
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useEffect(() {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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init();
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QueryBowl.of(context).onQueriesUpdate<T, Outside>(
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(newQuery) {
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if (newQuery.queryKey != job.queryKey || !mounted()) return;
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query.value = newQuery;
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update();
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},
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);
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});
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return disposeQuery;
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}, []);
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useEffect(() {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final hasOnErrorChanged = oldOnError != onError && oldOnError != null;
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final hasOnDataChanged = oldOnData != onData && oldOnData != null;
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if (oldJob != null && oldJob.queryKey != job.queryKey) {
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disposeQuery();
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/// setting the new query's initial data as prev query's data
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/// when [job.keepPreviousData] is true and both are dynamic
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if (oldJob.isDynamic &&
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job.isDynamic &&
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oldJob.keepPreviousData == true &&
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job.keepPreviousData == true) {
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init(query.value.data);
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} else {
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init();
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}
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} else if (!isShallowEqual(oldExternalData, externalData)) {
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if (job.refetchOnExternalDataChange ??
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queryBowl.refetchOnExternalDataChange) {
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QueryBowl.of(context).fetchQuery(
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job,
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externalData: externalData,
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onData: onData,
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onError: onError,
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key: uKey,
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);
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} else {
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QueryBowl.of(context)
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.getQuery(job.queryKey)
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?.setExternalData(externalData);
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}
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if (hasOnDataChanged) query.value.removeDataListener(oldOnData);
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if (hasOnErrorChanged) query.value.removeErrorListener(oldOnError);
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} else {
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if (hasOnDataChanged) {
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query.value.removeDataListener(oldOnData);
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if (onData != null) query.value.addDataListener(onData);
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}
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if (hasOnErrorChanged) {
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query.value.removeErrorListener(oldOnError);
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if (onError != null) query.value.addErrorListener(onError);
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}
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}
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});
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return null;
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});
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return query.value;
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}
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