google_apis/drive/auth_service.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef GOOGLE_APIS_DRIVE_AUTH_SERVICE_H_
   6 #define GOOGLE_APIS_DRIVE_AUTH_SERVICE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/observer_list.h"
  13 #include "base/threading/thread_checker.h"
  14 #include "google_apis/drive/auth_service_interface.h"
  15 #include "google_apis/gaia/oauth2_token_service.h"
  16
  17 namespace net {
  18 class URLRequestContextGetter;
  19 }
  20
  21 namespace google_apis {
  22
  23 class AuthServiceObserver;
  24
  25 // This class provides authentication for Google services.
  26 // It integrates specific service integration with OAuth2 stack
  27 // (OAuth2TokenService) and provides OAuth2 token refresh infrastructure.
  28 // All public functions must be called on UI thread.
  29 class AuthService : public AuthServiceInterface,
  30                     public OAuth2TokenService::Observer {
  31  public:
  32   // |url_request_context_getter| is used to perform authentication with
  33   // URLFetcher.
  34   //
  35   // |scopes| specifies OAuth2 scopes.
  36   AuthService(OAuth2TokenService* oauth2_token_service,
  37               const std::string& account_id,
  38               net::URLRequestContextGetter* url_request_context_getter,
  39               const std::vector<std::string>& scopes);
  40   ~AuthService() override;
  41
  42   // Overriden from AuthServiceInterface:
  43   void AddObserver(AuthServiceObserver* observer) override;
  44   void RemoveObserver(AuthServiceObserver* observer) override;
  45   void StartAuthentication(const AuthStatusCallback& callback) override;
  46   bool HasAccessToken() const override;
  47   bool HasRefreshToken() const override;
  48   const std::string& access_token() const override;
  49   void ClearAccessToken() override;
  50   void ClearRefreshToken() override;
  51
  52   // Overridden from OAuth2TokenService::Observer:
  53   void OnRefreshTokenAvailable(const std::string& account_id) override;
  54   void OnRefreshTokenRevoked(const std::string& account_id) override;
  55
  56  private:
  57   // Called when the state of the refresh token changes.
  58   void OnHandleRefreshToken(bool has_refresh_token);
  59
  60   // Called when authentication request from StartAuthentication() is
  61   // completed.
  62   void OnAuthCompleted(const AuthStatusCallback& callback,
  63                        DriveApiErrorCode error,
  64                        const std::string& access_token);
  65
  66   OAuth2TokenService* oauth2_token_service_;
  67   std::string account_id_;
  68   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
  69   bool has_refresh_token_;
  70   std::string access_token_;
  71   std::vector<std::string> scopes_;
  72   ObserverList<AuthServiceObserver> observers_;
  73   base::ThreadChecker thread_checker_;
  74
  75   // Note: This should remain the last member so it'll be destroyed and
  76   // invalidate its weak pointers before any other members are destroyed.
  77   base::WeakPtrFactory<AuthService> weak_ptr_factory_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(AuthService);
  80 };
  81
  82 }  // namespace google_apis
  83
  84 #endif  // GOOGLE_APIS_DRIVE_AUTH_SERVICE_H_