chrome/browser/net/network_annotation_monitor.h

// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_NET_NETWORK_ANNOTATION_MONITOR_H_
#define CHROME_BROWSER_NET_NETWORK_ANNOTATION_MONITOR_H_

#include "base/containers/flat_set.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "services/network/public/mojom/network_annotation_monitor.mojom.h"

// NetworkAnnotationMonitor monitors network calls reported via the `Report`
// method. Network calls are identified by their Network Annotation hash_code.
// It also maintains a set of network annotations that are expected to be
// disabled. When a network annotation that matches an expected disabled
// annotation is reported, then an UMA metric is emitted for that hash_code.
class NetworkAnnotationMonitor
    : public network::mojom::NetworkAnnotationMonitor {
 public:
  NetworkAnnotationMonitor();
  NetworkAnnotationMonitor(const NetworkAnnotationMonitor&) = delete;
  NetworkAnnotationMonitor& operator=(const NetworkAnnotationMonitor&) = delete;
  ~NetworkAnnotationMonitor() override;

  mojo::PendingRemote<network::mojom::NetworkAnnotationMonitor> GetClient();

  void SetDisabledAnnotationsForTesting(
      base::flat_set<int32_t> disabled_annotations);

  void FlushForTesting();

 private:
  void Report(int32_t hash_code) override;

  mojo::Receiver<network::mojom::NetworkAnnotationMonitor> receiver_{this};
  base::flat_set<int32_t> disabled_annotations_;
};

#endif  // CHROME_BROWSER_NET_NETWORK_ANNOTATION_MONITOR_H_