lemmur-app-android/lib/util/delayed_action.dart

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import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
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import 'package:lemmy_api_client/v3.dart';
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import '../hooks/delayed_loading.dart';
/// Executes an API action that uses [DelayedLoading], has a try-catch
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/// that displays a [SnackBar] when the action fails
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Future<void> delayedAction<T>({
@required BuildContext context,
@required DelayedLoading delayedLoading,
@required String instanceHost,
@required LemmyApiQuery<T> query,
Function(T) onSuccess,
Function(T) cleanup,
}) async {
assert(delayedLoading != null);
assert(instanceHost != null);
assert(query != null);
assert(context != null);
T val;
try {
delayedLoading.start();
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val = await LemmyApiV3(instanceHost).run<T>(query);
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onSuccess?.call(val);
// ignore: avoid_catches_without_on_clauses
} catch (e) {
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ScaffoldMessenger.of(context)
.showSnackBar(SnackBar(content: Text(e.toString())));
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}
cleanup?.call(val);
delayedLoading.cancel();
}