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// Copyright (c) 2012 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_GDATA_AUTH_SERVICE_H_
#define CHROME_BROWSER_CHROMEOS_GDATA_AUTH_SERVICE_H_
#include <string>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
#include "chrome/browser/chromeos/gdata/operations_base.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "google_apis/gaia/oauth2_access_token_fetcher.h"
class Profile;
namespace gdata {
class OperationRegistry;
// This class provides authentication for Google services.
// It integrates specific service integration with OAuth2 stack
// (TokenService) and provides OAuth2 token refresh infrastructure.
// All public functions must be called on UI thread.
class AuthService : public content::NotificationObserver {
public:
class Observer {
public:
// Triggered when a new OAuth2 refresh token is received from TokenService.
virtual void OnOAuth2RefreshTokenChanged() = 0;
protected:
virtual ~Observer() {}
};
explicit AuthService(const std::vector<std::string>& scopes);
virtual ~AuthService();
// Adds and removes the observer. AddObserver() should be called before
// Initialize() as it can change the refresh token.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Initializes the auth service. Starts TokenService to retrieve the
// refresh token.
void Initialize(Profile* profile);
// Starts fetching OAuth2 auth token from the refresh token for |scopes_|.
void StartAuthentication(OperationRegistry* registry,
const AuthStatusCallback& callback);
// True if an OAuth2 access token is retrieved and believed to be fresh.
// The access token is used to access the gdata server.
bool HasAccessToken() const { return !access_token_.empty(); }
// True if an OAuth2 refresh token is present. Its absence means that user
// is not properly authenticated.
// The refresh token is used to get the access token.
bool HasRefreshToken() const { return !refresh_token_.empty(); }
// Returns OAuth2 access token.
const std::string& access_token() const { return access_token_; }
// Clears OAuth2 access token.
void ClearAccessToken() { access_token_.clear(); }
// Overridden from content::NotificationObserver:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Sets the access_token as specified. This should be used only for testing.
void set_access_token_for_testing(const std::string& token) {
access_token_ = token;
}
private:
// Helper function for StartAuthentication() call.
void StartAuthenticationOnUIThread(OperationRegistry* registry,
const AuthStatusCallback& callback);
// Callback for AuthOperation (InternalAuthStatusCallback).
void OnAuthCompleted(const AuthStatusCallback& callback,
GDataErrorCode error,
const std::string& access_token);
Profile* profile_;
std::string refresh_token_;
std::string access_token_;
std::vector<std::string> scopes_;
ObserverList<Observer> observers_;
content::NotificationRegistrar registrar_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<AuthService> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(AuthService);
};
} // namespace gdata
#endif // CHROME_BROWSER_CHROMEOS_GDATA_AUTH_SERVICE_H_
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