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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_GOOGLE_APIS_AUTH_SERVICE_INTERFACE_H_
#define CHROME_BROWSER_GOOGLE_APIS_AUTH_SERVICE_INTERFACE_H_
#include <string>
#include "chrome/browser/google_apis/base_operations.h"
#include "chrome/browser/google_apis/gdata_errorcode.h"
class Profile;
namespace google_apis {
class OperationRegistry;
class AuthServiceObserver;
// Called when fetching of access token is complete.
typedef base::Callback<void(GDataErrorCode error,
const std::string& access_token)>
AuthStatusCallback;
// This defines an interface for the authentication service which is required
// by authenticated operations (AuthenticatedOperationInterface).
// All functions must be called on UI thread.
class AuthServiceInterface {
public:
// Adds and removes the observer. AddObserver() should be called before
// Initialize() as it can change the refresh token.
virtual void AddObserver(AuthServiceObserver* observer) = 0;
virtual void RemoveObserver(AuthServiceObserver* observer) = 0;
// Initializes the auth service. Starts TokenService to retrieve the
// refresh token.
virtual void Initialize(Profile* profile) = 0;
// Starts fetching OAuth2 access token from the refresh token.
// |callback| must not be null.
virtual void StartAuthentication(OperationRegistry* registry,
const AuthStatusCallback& callback) = 0;
// True if an OAuth2 access token is retrieved and believed to be fresh.
// The access token is used to access the Drive server.
virtual bool HasAccessToken() const = 0;
// 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.
virtual bool HasRefreshToken() const = 0;
// Returns OAuth2 access token.
virtual const std::string& access_token() const = 0;
// Clears OAuth2 access token.
virtual void ClearAccessToken() = 0;
};
} // namespace google_apis
#endif // CHROME_BROWSER_GOOGLE_APIS_AUTH_SERVICE_INTERFACE_H_
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