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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <map>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/background_fetch/background_fetch.mojom.h"
namespace content {
// Tracks the live BackgroundFetchRegistration objects across the
// renderer processes and provides the functionality to notify them of progress
// updates.
class CONTENT_EXPORT BackgroundFetchRegistrationNotifier {
// Registers the |observer| to be notified when fetches for the registration
// identified by the |unique_id| progress.
void AddObserver(
const std::string& unique_id,
// Notifies any registered observers for the |registration_data| of the
// progress. This will cause JavaScript events to fire. Completed fetches must
// also call Notify with the final state.
void Notify(
const std::string& unique_id,
const blink::mojom::BackgroundFetchRegistrationData& registration_data);
// Notifies any registered observers for the registration identified by
// |unique_id| that the records for the fetch are no longer available.
void NotifyRecordsUnavailable(const std::string& unique_id);
// Notifies any registered observers for the registration identified by
// |unique_id| that the |request| has completed. |response| points to the
// completed response, if any.
void NotifyRequestCompleted(const std::string& unique_id,
blink::mojom::FetchAPIRequestPtr request,
blink::mojom::FetchAPIResponsePtr response);
// Add |url| to the list of |observed_urls_|. Once this is done, the
// |observers_| start getting updates about any requests with this URL.
void AddObservedUrl(const std::string& unique_id, const GURL& url);
void NoteTotalRequests(const std::string& unique_id, int num_total_requests);
base::WeakPtr<BackgroundFetchRegistrationNotifier> GetWeakPtr() {
return weak_factory_.GetWeakPtr();
// Called when the connection with the |observer| for the registration
// identified by the |unique_id| goes away.
void OnConnectionError(
const std::string& unique_id,
blink::mojom::BackgroundFetchRegistrationObserver* observer);
// Storage of observers keyed by the |unique_id| of a registration.
// URLs the observers care about, indexed by the unique_id of the observer.
std::map<std::string, std::set<GURL>> observed_urls_;
// For the observer identified by |unique_id|, this stores the number of its
// requests, and the number for which updates are sent across the mojo pipe.
// This is used for UMA recording.
std::map<std::string, std::pair<int, int>> num_requests_and_updates_;
base::WeakPtrFactory<BackgroundFetchRegistrationNotifier> weak_factory_{this};
} // namespace content