78 lines
2.5 KiB
Dart
78 lines
2.5 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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Mutation<T, V> useMutation<T extends Object, V>({
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required MutationJob<T, V> job,
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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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MutationListener<T>? onData,
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/// Called when the query returns error
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MutationListener<dynamic>? onError,
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/// called right before the mutation is about to run
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///
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/// perfect scenario for doing optimistic updates
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MutationListener<V>? onMutate,
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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 mutation =
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useRef(Mutation<T, V>.fromOptions(job, queryBowl: queryBowl));
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final init = useCallback(() {
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mutation.value = queryBowl.addMutation<T, V>(
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job,
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onData: onData,
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onError: onError,
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onMutate: onMutate,
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key: uKey,
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);
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}, [mutation.value, job, onData, onError, onMutate, uKey]);
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final disposeMutation = useCallback(() {
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mutation.value.unmount(uKey);
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if (onData != null) mutation.value.onDataListeners.remove(onData);
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if (onError != null) mutation.value.onErrorListeners.remove(onError);
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if (onMutate != null) mutation.value.onMutateListeners.remove(onMutate);
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}, [mutation.value, onData, onError, onMutate]);
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final oldJob = usePrevious(job);
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final oldOnData = usePrevious(onData);
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final oldOnError = usePrevious(onError);
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final oldOnMutate = usePrevious(onMutate);
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useEffect(() {
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init();
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return disposeMutation;
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}, []);
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useEffect(() {
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if (oldJob != null && oldJob.mutationKey != job.mutationKey) {
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disposeMutation();
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init();
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} else {
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if (oldOnData != onData && oldOnData != null) {
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mutation.value.onDataListeners.remove(oldOnData);
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if (onData != null) mutation.value.onDataListeners.add(onData);
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}
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if (oldOnError != onError && oldOnError != null) {
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mutation.value.onErrorListeners.remove(oldOnError);
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if (onError != null) mutation.value.onErrorListeners.add(onError);
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}
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if (oldOnMutate != onMutate && oldOnMutate != null) {
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mutation.value.onMutateListeners.remove(oldOnMutate);
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if (onMutate != null) mutation.value.onMutateListeners.add(onMutate);
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}
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}
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return null;
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});
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return queryBowl.getMutation<T, V>(job.mutationKey) ?? mutation.value;
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}
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