Brian Wilkerson
6f15530536
Change-Id: I908e15b4820eab0e8375994ce3cebfac332306f3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141581 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
78 lines
2.9 KiB
Dart
78 lines
2.9 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'package:analyzer_plugin/protocol/protocol_generated.dart';
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/// An object that manages the subscriptions for analysis results.
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///
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/// Clients may not extend, implement or mix-in this class.
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class SubscriptionManager {
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/// The current set of subscriptions.
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Map<AnalysisService, List<String>> _subscriptions;
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/// Initialize a newly created subscription manager to have no subscriptions.
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SubscriptionManager();
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/// Return `true` if the file with the given [filePath] has a subscription for
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/// the given [service].
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bool hasSubscriptionForFile(String filePath, AnalysisService service) {
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if (_subscriptions == null) {
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return false;
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}
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var files = _subscriptions[service];
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return files != null && files.contains(filePath);
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}
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/// Return a list of the services for which the file with the given [filePath]
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/// has been subscribed.
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List<AnalysisService> servicesForFile(String filePath) {
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var services = <AnalysisService>[];
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if (_subscriptions != null) {
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_subscriptions.forEach((AnalysisService service, List<String> files) {
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if (files.contains(filePath)) {
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services.add(service);
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}
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});
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}
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return services;
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}
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/// Set the current set of subscriptions to those described by the given map
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/// of [subscriptions]. Return a map representing the subset of the
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/// subscriptions that are new. These are the subscriptions for which a
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/// notification should be sent. The returned map is keyed by the path of each
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/// file for which notifications should be send and has values representing
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/// the list of services that were added for that file.
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Map<String, List<AnalysisService>> setSubscriptions(
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Map<AnalysisService, List<String>> subscriptions) {
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var newSubscriptions = <String, List<AnalysisService>>{};
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if (_subscriptions == null) {
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// This is the first time subscriptions have been set, so all of the
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// subscriptions are new.
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subscriptions.forEach((AnalysisService service, List<String> paths) {
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for (var path in paths) {
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newSubscriptions
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.putIfAbsent(path, () => <AnalysisService>[])
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.add(service);
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}
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});
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} else {
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// The subscriptions have been changed, to we need to compute the
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// difference.
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subscriptions.forEach((AnalysisService service, List<String> paths) {
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var oldPaths = _subscriptions[service];
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for (var path in paths) {
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if (!oldPaths.contains(path)) {
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newSubscriptions
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.putIfAbsent(path, () => <AnalysisService>[])
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.add(service);
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}
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}
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});
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}
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_subscriptions = subscriptions;
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return newSubscriptions;
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}
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}
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