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git-touch-android-ios-app/lib/scaffolds/refresh_stateful.dart

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import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
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import 'package:git_touch/scaffolds/common.dart';
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import 'package:git_touch/scaffolds/utils.dart';
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import 'package:primer/primer.dart';
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class RefreshStatefulScaffoldPayload<T> {
bool loading;
String error;
T data;
void Function() refresh;
RefreshStatefulScaffoldPayload(
this.loading, this.error, this.data, this.refresh);
}
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class RefreshStatefulScaffold<T> extends StatefulWidget {
final Widget title;
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final Widget Function(RefreshStatefulScaffoldPayload<T> payload) bodyBuilder;
final Future<T> Function() fetchData;
final Widget Function(RefreshStatefulScaffoldPayload<T> payload)
actionBuilder;
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RefreshStatefulScaffold({
@required this.title,
@required this.bodyBuilder,
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@required this.fetchData,
this.actionBuilder,
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});
@override
_RefreshStatefulScaffoldState createState() =>
_RefreshStatefulScaffoldState();
}
class _RefreshStatefulScaffoldState<T>
extends State<RefreshStatefulScaffold<T>> {
bool _loading;
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T _data;
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String _error = '';
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RefreshStatefulScaffoldPayload get _payload =>
RefreshStatefulScaffoldPayload(_loading, _error, _data, _refresh);
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@override
void initState() {
super.initState();
_refresh();
}
Future<void> _refresh() async {
try {
setState(() {
_error = '';
_loading = true;
});
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_data = await widget.fetchData();
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} catch (err) {
_error = err.toString();
throw err;
} finally {
if (mounted) {
setState(() {
_loading = false;
});
}
}
}
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Widget get _action {
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if (widget.actionBuilder == null) return null;
return widget.actionBuilder(_payload);
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}
@override
Widget build(BuildContext context) {
return CommonScaffold(
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backgroundColor: _data == null ? Colors.white : PrimerColors.gray100,
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title: widget.title,
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body: RefreshWrapper(
onRefresh: _refresh,
body: ErrorLoadingWrapper(
bodyBuilder: () => widget.bodyBuilder(_payload),
error: _error,
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loading: _data == null,
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reload: _refresh,
),
),
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action: _action,
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);
}
}