Kingkor Roy Tirtho
86 lines
2.4 KiB
Dart
86 lines
2.4 KiB
Dart
import 'package:fl_query/models/query_job.dart';
|
|
import 'package:fl_query/query.dart';
|
|
import 'package:fl_query/query_bowl.dart';
|
|
import 'package:flutter/widgets.dart';
|
|
|
|
class QueryBuilder<T extends Object, Outside> extends StatefulWidget {
|
|
final Function(BuildContext, Query<T, Outside>) builder;
|
|
final QueryJob<T, Outside> job;
|
|
final Outside externalData;
|
|
|
|
/// Called when the query returns new data, on query
|
|
/// refetch or query gets expired
|
|
final QueryListener<T>? onData;
|
|
|
|
/// Called when the query returns error
|
|
final QueryListener<dynamic>? onError;
|
|
|
|
const QueryBuilder({
|
|
required this.job,
|
|
required this.externalData,
|
|
required this.builder,
|
|
this.onData,
|
|
this.onError,
|
|
Key? key,
|
|
}) : super(key: key);
|
|
|
|
@override
|
|
State<QueryBuilder<T, Outside>> createState() =>
|
|
_QueryBuilderState<T, Outside>();
|
|
}
|
|
|
|
class _QueryBuilderState<T extends Object, Outside>
|
|
extends State<QueryBuilder<T, Outside>> {
|
|
late QueryBowl queryBowl;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
WidgetsBinding.instance.addPostFrameCallback((_) async {
|
|
queryBowl = QueryBowl.of(context);
|
|
await queryBowl.fetchQuery<T, Outside>(
|
|
widget.job,
|
|
externalData: widget.externalData,
|
|
onData: widget.onData,
|
|
onError: widget.onError,
|
|
mount: widget,
|
|
);
|
|
});
|
|
}
|
|
|
|
@override
|
|
void didUpdateWidget(covariant oldWidget) {
|
|
if (oldWidget.externalData != widget.externalData) {
|
|
queryBowl = QueryBowl.of(context);
|
|
// clearing up the old widget before adding the new updated one
|
|
// so unmounted zombie widgets don't get piled up
|
|
queryBowl.getQuery(widget.job.queryKey)?.unmount(oldWidget);
|
|
queryBowl.fetchQuery(
|
|
widget.job,
|
|
externalData: widget.externalData,
|
|
onData: widget.onData,
|
|
onError: widget.onError,
|
|
mount: widget,
|
|
);
|
|
}
|
|
super.didUpdateWidget(oldWidget);
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
final query = queryBowl.getQuery(widget.job.queryKey);
|
|
query?.unmount(widget);
|
|
if (widget.onData != null) query?.onDataListeners.remove(widget.onData);
|
|
if (widget.onError != null) query?.onErrorListeners.remove(widget.onError);
|
|
super.dispose();
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
queryBowl = QueryBowl.of(context);
|
|
final query = queryBowl.getQuery<T, Outside>(widget.job.queryKey);
|
|
if (query == null) return Container();
|
|
return widget.builder(context, query);
|
|
}
|
|
}
|