Refactor AO2TS to make it easier to componentize.

components/signin/ios/browser/profile_oauth2_token_service_ios.h

-// Copyright 2014 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 COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_
-#define COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_
-
-#include <string>
-
-#include "base/threading/thread_checker.h"
-#include "components/signin/core/browser/profile_oauth2_token_service.h"
-#include "components/signin/core/browser/signin_error_controller.h"
-
-class OAuth2AccessTokenFetcher;
-
-namespace ios{
-class ProfileOAuth2TokenServiceIOSProvider;
-}
-
-// A specialization of ProfileOAuth2TokenService that will be returned by
-// ProfileOAuth2TokenServiceFactory for OS_IOS when iOS authentication service
-// is used to lookup OAuth2 tokens.
-//
-// See |ProfileOAuth2TokenService| for usage details.
-//
-// Note: Requests should be started from the UI thread. To start a
-// request from aother thread, please use OAuth2TokenServiceRequest.
-class ProfileOAuth2TokenServiceIOS : public ProfileOAuth2TokenService {
- public:
-  // KeyedService
-  void Shutdown() override;
-
-  // OAuth2TokenService
-  bool RefreshTokenIsAvailable(const std::string& account_id) const override;
-
-  void InvalidateOAuth2Token(const std::string& account_id,
-                             const std::string& client_id,
-                             const ScopeSet& scopes,
-                             const std::string& access_token) override;
-
-  // ProfileOAuth2TokenService
-  void Initialize(SigninClient* client,
-                  SigninErrorController* signin_error_controller) override;
-  void LoadCredentials(const std::string& primary_account_id) override;
-  std::vector<std::string> GetAccounts() override;
-  void UpdateAuthError(const std::string& account_id,
-                       const GoogleServiceAuthError& error) override;
-
-  // This method should not be called when using shared authentication.
-  void UpdateCredentials(const std::string& account_id,
-                         const std::string& refresh_token) override;
-
-  // Removes all credentials from this instance of |ProfileOAuth2TokenService|,
-  // however, it does not revoke the identities from the device.
-  // Subsequent calls to |RefreshTokenIsAvailable| will return |false|.
-  void RevokeAllCredentials() override;
-
-  // Reloads accounts from the provider. Fires |OnRefreshTokenAvailable| for
-  // each new account. Fires |OnRefreshTokenRevoked| for each account that was
-  // removed.
-  // It expects that there is already a primary account id.
-  void ReloadCredentials();
-
-  // Sets the primary account and then reloads the accounts from the provider.
-  // Should be called when the user signs in to a new account.
-  // |primary_account_id| must not be an empty string.
-  void ReloadCredentials(const std::string& primary_account_id);
-
-  // Sets the account that should be ignored by this token service.
-  // |ReloadCredentials| needs to be called for this change to be effective.
-  void ExcludeSecondaryAccount(const std::string& account_id);
-  void IncludeSecondaryAccount(const std::string& account_id);
-  void ExcludeSecondaryAccounts(const std::vector<std::string>& account_ids);
-
-  // Excludes all secondary accounts. |ReloadCredentials| needs to be called for
-  // this change to be effective.
-  void ExcludeAllSecondaryAccounts();
-
- protected:
-  friend class ProfileOAuth2TokenServiceFactory;
-  friend class ProfileOAuth2TokenServiceIOSTest;
-  FRIEND_TEST_ALL_PREFIXES(ProfileOAuth2TokenServiceIOSTest,
-                           ExcludeSecondaryAccounts);
-  FRIEND_TEST_ALL_PREFIXES(ProfileOAuth2TokenServiceIOSTest,
-                           LoadRevokeCredentialsClearsExcludedAccounts);
-
-  ProfileOAuth2TokenServiceIOS();
-  ~ProfileOAuth2TokenServiceIOS() override;
-
-  OAuth2AccessTokenFetcher* CreateAccessTokenFetcher(
-      const std::string& account_id,
-      net::URLRequestContextGetter* getter,
-      OAuth2AccessTokenConsumer* consumer) override;
-
-  // Protected and virtual to be overriden by fake for testing.
-
-  // Adds |account_id| to |accounts_| if it does not exist or udpates
-  // the auth error state of |account_id| if it exists. Fires
-  // |OnRefreshTokenAvailable| if the account info is updated.
-  virtual void AddOrUpdateAccount(const std::string& account_id);
-
-  // Removes |account_id| from |accounts_|. Fires |OnRefreshTokenRevoked|
-  // if the account info is removed.
-  virtual void RemoveAccount(const std::string& account_id);
-
- private:
-  class AccountInfo : public SigninErrorController::AuthStatusProvider {
-   public:
-    AccountInfo(SigninErrorController* signin_error_controller,
-                const std::string& account_id);
-    ~AccountInfo() override;
-
-    void SetLastAuthError(const GoogleServiceAuthError& error);
-
-    // SigninErrorController::AuthStatusProvider implementation.
-    std::string GetAccountId() const override;
-    GoogleServiceAuthError GetAuthStatus() const override;
-
-    bool marked_for_removal() const { return marked_for_removal_; }
-    void set_marked_for_removal(bool marked_for_removal) {
-      marked_for_removal_ = marked_for_removal;
-    }
-
-   private:
-    SigninErrorController* signin_error_controller_;
-    std::string account_id_;
-    GoogleServiceAuthError last_auth_error_;
-    bool marked_for_removal_;
-
-    DISALLOW_COPY_AND_ASSIGN(AccountInfo);
-  };
-
-  // Maps the |account_id| of accounts known to ProfileOAuth2TokenService
-  // to information about the account.
-  typedef std::map<std::string, linked_ptr<AccountInfo> > AccountInfoMap;
-
-  // Returns the iOS provider;
-  ios::ProfileOAuth2TokenServiceIOSProvider* GetProvider();
-
-  // Returns the account ids that should be ignored by this token service.
-  std::set<std::string> GetExcludedSecondaryAccounts();
-
-  // Returns true if this token service should exclude all secondary accounts.
-  bool GetExcludeAllSecondaryAccounts();
-
-  // Clears exclude secondary accounts preferences.
-  void ClearExcludedSecondaryAccounts();
-
-  // The primary account id.
-  std::string primary_account_id_;
-
-  // Info about the existing accounts.
-  AccountInfoMap accounts_;
-
-  // Calls to this class are expected to be made from the browser UI thread.
-  // The purpose of this checker is to detect access to
-  // ProfileOAuth2TokenService from multiple threads in upstream code.
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProfileOAuth2TokenServiceIOS);
-};
-
-#endif  // COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_