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// Copyright (c) 2009 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.
#ifndef CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_
#include <string>
#include "base/observer_list.h"
#include "base/singleton.h"
#include "base/time.h"
#include "cros/chromeos_update_engine.h"
namespace chromeos {
// This interface defines interaction with the ChromeOS update library APIs.
// Classes can add themselves as observers. Users can get an instance of this
// library class like this: chromeos::CrosLibrary::Get()->GetUpdateLibrary()
class UpdateLibrary {
public:
// TODO(seanparent): Should make the UpdateProgress type copyable.
// We need to copy it to bind it for a deferred notification.
// Modifying the cros library just for that, for a single use case,
// isn't worth it. Instead we define this a local Status struct that
// is copyable.
struct Status {
Status()
: status(UPDATE_STATUS_IDLE),
download_progress(0.0),
last_checked_time(0),
new_size(0) {
}
explicit Status(const UpdateProgress& x) :
status(x.status_),
download_progress(x.download_progress_),
last_checked_time(x.last_checked_time_),
new_version(x.new_version_),
new_size(x.new_size_) {
}
UpdateStatusOperation status;
double download_progress; // 0.0 - 1.0
int64_t last_checked_time; // As reported by std::time().
std::string new_version;
int64_t new_size; // Valid during DOWNLOADING, in bytes.
};
class Observer {
public:
virtual ~Observer() { }
virtual void Changed(UpdateLibrary* obj) = 0;
};
virtual ~UpdateLibrary() {}
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
virtual const Status& status() const = 0;
};
class UpdateLibraryImpl : public UpdateLibrary {
public:
UpdateLibraryImpl();
virtual ~UpdateLibraryImpl();
// UpdateLibrary overrides.
virtual void AddObserver(Observer* observer);
virtual void RemoveObserver(Observer* observer);
virtual const Status& status() const;
private:
// This method is called when there's a change in status.
// This method is called on a background thread.
static void ChangedHandler(void* object, const UpdateProgress& status);
// This methods starts the monitoring of power changes.
void Init();
// Called by the handler to update the power status.
// This will notify all the Observers.
void UpdateStatus(const Status& status);
ObserverList<Observer> observers_;
// A reference to the update api, to allow callbacks when the update
// status changes.
UpdateStatusConnection status_connection_;
// The latest power status.
Status status_;
DISALLOW_COPY_AND_ASSIGN(UpdateLibraryImpl);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_
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