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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_DBUS_CHROMEBOX_FOR_MEETINGS_CFM_HOTLINE_CLIENT_H_
#define CHROMEOS_ASH_COMPONENTS_DBUS_CHROMEBOX_FOR_MEETINGS_CFM_HOTLINE_CLIENT_H_
#include "base/component_export.h"
#include "base/files/scoped_file.h"
#include "base/functional/callback_forward.h"
#include "dbus/object_proxy.h"
#include "chromeos/ash/components/dbus/chromebox_for_meetings/cfm_observer.h"
namespace dbus {
class Bus;
}
namespace ash {
// CfmHotlineClient is used to communicate with the hotline system daemon.
// The only purpose of the D-Bus service is to bootstrap a Mojo IPC
// connection. All methods should be called from the origin thread (UI thread)
// which initializes the DBusThreadManager instance.
class COMPONENT_EXPORT(CFM_HOTLINE_CLIENT) CfmHotlineClient {
public:
using BootstrapMojoConnectionCallback = base::OnceCallback<void(bool)>;
CfmHotlineClient(const CfmHotlineClient&) = delete;
CfmHotlineClient& operator=(const CfmHotlineClient&) = delete;
// Creates and initializes the global instance. |bus| must not be null.
static void Initialize(dbus::Bus* bus);
// Creates and initializes a fake global instance if not already created.
static void InitializeFake();
// Destroys the global instance.
static void Shutdown();
// Checks if initialization was performed
static bool IsInitialized();
// Returns the global instance which may be null if not initialized.
static CfmHotlineClient* Get();
// Registers |callback| to run when the hotline daemon becomes available.
// If the daemon is already available, or if connecting to the name-owner-
// changed signal fails, |callback| will be run once asynchronously.
// Otherwise, |callback| will be run once in the future after the service
// becomes available.
virtual void WaitForServiceToBeAvailable(
dbus::ObjectProxy::WaitForServiceToBeAvailableCallback callback) = 0;
// Passes the file descriptor |fd| over D-Bus to the hotline daemon.
// * The daemon expects a Mojo invitation in |fd| with an attached Mojo pipe.
// * The daemon will bind the Mojo pipe to an implementation of
// chromeos::cfm::mojom::CfmServiceContext
// * Upon completion of the D-Bus call, |result_callback| will be invoked to
// returning if the operation was successful or not.
// * This method will first wait for the daemon to become
// available.
virtual void BootstrapMojoConnection(
base::ScopedFD fd,
BootstrapMojoConnectionCallback result_callback) = 0;
// Adds an observer instance to the observers list to listen on changes like
// DLC state change, etc.
virtual void AddObserver(cfm::CfmObserver* observer) = 0;
// Removes an observer from observers list.
virtual void RemoveObserver(cfm::CfmObserver* observer) = 0;
protected:
// Initialize/Shutdown should be used instead.
CfmHotlineClient();
virtual ~CfmHotlineClient();
};
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_DBUS_CHROMEBOX_FOR_MEETINGS_CFM_HOTLINE_CLIENT_H_
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