public:

// An error happened.

virtual void OnError(const std::string& message) {}

virtual void OnError(const std::string& message,

const int code,

const std::string& domain) {}

// Checking to see if there is an update

virtual void OnCheckingForUpdate() {}

// There is an update available and it is being downloaded

virtual void OnUpdateAvailable() {}

// There is no available update.

virtual void OnUpdateNotAvailable() {}

// There is a new update which has been downloaded.

virtual void OnUpdateDownloaded(const std::string& release_notes,

const std::string& release_name,

const base::Time& release_date,

const std::string& update_url) {}

protected:

virtual ~Delegate() {}

public:

typedef std::map<std::string, std::string> HeaderMap;

AutoUpdater() = delete;

// disable copy

AutoUpdater(const AutoUpdater&) = delete;

AutoUpdater& operator=(const AutoUpdater&) = delete;

// Gets/Sets the delegate.

static Delegate* GetDelegate();

static void SetDelegate(Delegate* delegate);

static std::string GetFeedURL();

// FIXME(zcbenz): We should not do V8 in this file, this method should only

// accept C++ struct as parameter, and atom_api_auto_updater.cc is responsible

// for parsing the parameter from JavaScript.

static void SetFeedURL(gin::Arguments* args);

static void CheckForUpdates();

static void QuitAndInstall();

private:

static Delegate* delegate_;