99 lines
2.2 KiB
Dart
99 lines
2.2 KiB
Dart
import 'package:fl_query/query.dart';
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import 'package:collection/collection.dart';
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import 'package:flutter/widgets.dart';
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class QueryBowlScope extends StatefulWidget {
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final Widget child;
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final Duration? staleTime;
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const QueryBowlScope({
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required this.child,
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this.staleTime,
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Key? key,
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}) : super(key: key);
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@override
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State<QueryBowlScope> createState() => _QueryBowlScopeState();
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}
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class _QueryBowlScopeState extends State<QueryBowlScope> {
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late Set<Query> queries;
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@override
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void initState() {
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super.initState();
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queries = {};
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}
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void updateQueries() {
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setState(() {
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queries = Set.from(queries);
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});
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}
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@override
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Widget build(BuildContext context) {
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return QueryBowl(
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onUpdate: updateQueries,
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queries: queries,
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child: widget.child,
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);
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}
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}
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class QueryBowl extends InheritedWidget {
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final Set<Query> queries;
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final Duration staleTime;
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final void Function() onUpdate;
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const QueryBowl({
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required Widget child,
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required this.onUpdate,
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required this.queries,
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this.staleTime = const Duration(minutes: 5),
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Key? key,
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}) : super(child: child, key: key);
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listenToQueryUpdate() {
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for (final query in queries) {
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query.addListener(onUpdate);
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}
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}
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void disposeListeners() {
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for (final query in queries) {
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query.removeListener(onUpdate);
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}
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}
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Future<T?> fetchQuery<T>(Query<T> query) async {
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final prevQuery =
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queries.firstWhereOrNull((q) => q.queryKey == query.queryKey);
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if (prevQuery is Query<T>) {
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if (!prevQuery.hasData) {
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return prevQuery.fetched
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? await prevQuery.refetch()
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: await prevQuery.fetch();
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}
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return prevQuery.data;
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}
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queries.add(query);
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disposeListeners();
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listenToQueryUpdate();
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return await query.fetch();
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}
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Query<T>? getQuery<T>(String queryKey) {
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return queries.firstWhereOrNull(
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(query) => query.queryKey == queryKey && query is Query<T>)
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as Query<T>?;
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}
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static QueryBowl of(BuildContext context) =>
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context.dependOnInheritedWidgetOfExactType<QueryBowl>()!;
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@override
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bool updateShouldNotify(QueryBowl oldWidget) {
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return oldWidget.staleTime != staleTime || oldWidget.queries != queries;
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}
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}
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