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// Copyright 2023 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_CHROMEOS_EXTENSIONS_TELEMETRY_API_EVENTS_EVENT_ROUTER_H_
#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_TELEMETRY_API_EVENTS_EVENT_ROUTER_H_
#include <memory>
#include <vector>
#include "base/containers/fixed_flat_set.h"
#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/chromeos/extensions/telemetry/api/events/event_observation_crosapi.h"
#include "chromeos/crosapi/mojom/telemetry_event_service.mojom.h"
#include "content/public/browser/browser_context.h"
#include "extensions/common/extension_id.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace chromeos {
inline constexpr auto kCategoriesWithFocusRestriction =
base::MakeFixedFlatSet<crosapi::mojom::TelemetryEventCategoryEnum>({
crosapi::mojom::TelemetryEventCategoryEnum::kTouchpadButton,
crosapi::mojom::TelemetryEventCategoryEnum::kTouchpadTouch,
crosapi::mojom::TelemetryEventCategoryEnum::kTouchpadConnected,
crosapi::mojom::TelemetryEventCategoryEnum::kStylusTouch,
crosapi::mojom::TelemetryEventCategoryEnum::kStylusConnected,
crosapi::mojom::TelemetryEventCategoryEnum::kTouchscreenTouch,
crosapi::mojom::TelemetryEventCategoryEnum::kTouchscreenConnected,
});
class EventObservationCrosapi;
class EventRouter {
public:
explicit EventRouter(content::BrowserContext* context);
EventRouter(const EventRouter&) = delete;
EventRouter& operator=(const EventRouter&) = delete;
~EventRouter();
// Binds a `PendingRemote` for a certain category with an associated
// `ExtensionId`. For one category there can always be a number of receivers.
// The `ExtensionId` is needed to dispatch an actual event to a specific
// extension.
mojo::PendingRemote<crosapi::mojom::TelemetryEventObserver>
GetPendingRemoteForCategoryAndExtension(
crosapi::mojom::TelemetryEventCategoryEnum category,
extensions::ExtensionId extension_id);
// Cuts the mojom pipe to all connected remotes for a certain extension.
void ResetReceiversForExtension(extensions::ExtensionId extension_id);
// Cuts the mojom pipe to all connected remotes for a certain extension and
// category.
void ResetReceiversOfExtensionByCategory(
extensions::ExtensionId extension_id,
crosapi::mojom::TelemetryEventCategoryEnum category);
// Prevent the mojom pipe from sending focus-restricted events to all
// connected remotes for a certain extension.
void RestrictReceiversOfExtension(extensions::ExtensionId extension_id);
// Allow the mojom pipe from sending focus-restricted events to all
// connected remotes for a certain extension.
void UnrestrictReceiversOfExtension(extensions::ExtensionId extension_id);
// Checks whether an extension is observing any event.
bool IsExtensionObserving(extensions::ExtensionId extension_id);
// Checks whether an extension is observing a certain category of event.
bool IsExtensionObservingForCategory(
extensions::ExtensionId extension_id,
crosapi::mojom::TelemetryEventCategoryEnum category);
// Checks whether an extension is blocked from focus-restricted events.
bool IsExtensionRestricted(extensions::ExtensionId extension_id);
// Checks whether an extension is allowed (i.e., not restricted) for a certain
// category of event.
bool IsExtensionAllowedForCategory(
extensions::ExtensionId extension_id,
crosapi::mojom::TelemetryEventCategoryEnum category);
private:
// Observers grouped by category and extension.
base::flat_map<extensions::ExtensionId,
base::flat_map<crosapi::mojom::TelemetryEventCategoryEnum,
std::unique_ptr<EventObservationCrosapi>>>
observers_;
// Extensions in the restricted state (i.e., blocked from focus-restricted
// events).
base::flat_set<extensions::ExtensionId> restricted_extensions_;
const raw_ptr<content::BrowserContext, DanglingUntriaged> browser_context_;
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_EXTENSIONS_TELEMETRY_API_EVENTS_EVENT_ROUTER_H_
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