108 lines
3.4 KiB
Dart
108 lines
3.4 KiB
Dart
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 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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Query.fromOptions(
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job,
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externalData: externalData,
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queryBowl: queryBowl,
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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(() {
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query.value = queryBowl.addQuery<T, Outside>(
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query.value,
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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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final hasExternalDataChanged = query.value.externalData != null &&
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query.value.prevUsedExternalData != null &&
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!isShallowEqual(
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query.value.externalData!, query.value.prevUsedExternalData!);
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(query.value.fetched && query.value.refetchOnMount == true) ||
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hasExternalDataChanged
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? query.value.refetch()
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: query.value.fetch();
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}, [queryBowl, query.value, uKey, onData, onError, job]);
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final disposeQuery = useCallback(() {
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query.value.unmount(uKey);
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if (onData != null) query.value.onDataListeners.remove(onData);
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if (onError != null) query.value.onErrorListeners.remove(onError);
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}, [query.value, onData, onError, uKey]);
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useEffect(() {
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init();
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return disposeQuery;
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}, []);
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useEffect(() {
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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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query.value = Query.fromOptions(
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job,
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externalData: externalData,
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queryBowl: queryBowl,
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);
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init();
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} else if (oldExternalData != null &&
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externalData != null &&
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!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.onDataListeners.remove(oldOnData);
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if (hasOnErrorChanged) query.value.onErrorListeners.remove(oldOnError);
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} else {
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if (hasOnDataChanged) {
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query.value.onDataListeners.remove(oldOnData);
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if (onData != null) query.value.onDataListeners.add(onData);
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}
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if (hasOnErrorChanged) {
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query.value.onErrorListeners.remove(oldOnError);
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if (onError != null) query.value.onErrorListeners.add(onError);
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}
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}
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return null;
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});
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return queryBowl.getQuery<T, Outside>(job.queryKey) ?? query.value;
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}
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