Create a new AccountTrackerService

components/signin/core/browser/account_tracker_service.h

Index: components/signin/core/browser/account_tracker_service.h
diff --git a/components/signin/core/browser/account_tracker_service.h b/components/signin/core/browser/account_tracker_service.h
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+++ b/components/signin/core/browser/account_tracker_service.h
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+// 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_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
+#define COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "google_apis/gaia/oauth2_token_service.h"
+
+class AccountInfoFetcher;
+class OAuth2TokenService;
+class PrefService;
+
+namespace base {
+class DictionaryValue;
+}
+
+// AccountTrackerService is a KeyedService that retrieves and caches GAIA
+// information about Google Accounts.
+class AccountTrackerService : public KeyedService,
+                              public OAuth2TokenService::Observer {
+ public:
+  // Name of the preference property that persists the account information
+  // tracked by this service.
+  static const char kAccountInfoPref[];
+
+  // Information about a specific account.
+  struct AccountInfo {
+    std::string account_id;  // The account ID used by OAuth2TokenService.
+    std::string gaia;
+    std::string email;
+    // TODO(rogerta): eventually this structure will include other information
+    // about the account, like full name, profile picture URL, etc.
+  };
+
+  // Clients of AccountTrackerService can implement this interface and register
+  // with AddObserver() to learn about account information changes.
+  class Observer {
+   public:
+    virtual ~Observer() {}
+    virtual void OnAccountUpdated(const AccountInfo& info) = 0;
+    virtual void OnAccountRemoved(const AccountInfo& info) = 0;
+  };
+
+  AccountTrackerService();
+  virtual ~AccountTrackerService();
+
+  // KeyedService implementation.
+  virtual void Shutdown() OVERRIDE;
+
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  void Initialize(OAuth2TokenService* token_service,
+                  PrefService* pref_service,
+                  net::URLRequestContextGetter* request_context_getter);
+
+  // Returns the list of known accounts and for which gaia IDs
+  // have been fetched.
+  std::vector<AccountInfo> GetAccounts() const;
+  AccountInfo GetAccountInfo(const std::string& account_id);
+  AccountInfo FindAccountInfoByGaiaId(const std::string& gaia_id);
+  AccountInfo FindAccountInfoByEmail(const std::string& email);
+
+  // Indicates if all user information has been fetched. If the result is false,
+  // there are still unfininshed fetchers.
+  virtual bool IsAllUserInfoFetched() const;
+
+ private:
+  friend class AccountInfoFetcher;
+
+  // These methods are called by fetchers.
+  void OnUserInfoFetchSuccess(AccountInfoFetcher* fetcher,
+                              const base::DictionaryValue* user_info);
+  void OnUserInfoFetchFailure(AccountInfoFetcher* fetcher);
+
+  // OAuth2TokenService::Observer implementation.
+  virtual void OnRefreshTokenAvailable(const std::string& account_id) OVERRIDE;
+  virtual void OnRefreshTokenRevoked(const std::string& account_id) OVERRIDE;
+
+  struct AccountState {
+    AccountInfo info;
+  };
+
+  void NotifyAccountUpdated(const AccountState& state);
+  void NotifyAccountRemoved(const AccountState& state);
+
+  void StartTrackingAccount(const std::string& account_id);
+  void StopTrackingAccount(const std::string& account_id);
+  void StartFetchingUserInfo(const std::string& account_id);
+  void DeleteFetcher(AccountInfoFetcher* fetcher);
+
+  // Load the current state of the account info from the preferences file.
+  void LoadFromPrefs();
+  void SaveToPrefs(const AccountState& account);
+  void RemoveFromPrefs(const AccountState& account);
+
+  void LoadFromTokenService();
+
+  OAuth2TokenService* token_service_;  // Not owned.
+  PrefService* pref_service_;  // Not owned.
+  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
+  std::map<std::string, AccountInfoFetcher*> user_info_requests_;
+  std::map<std::string, AccountState> accounts_;
+  ObserverList<Observer> observer_list_;
+  bool shutdown_called_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccountTrackerService);
+};
+
+#endif  // COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_