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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 GOOGLE_APIS_GAIA_IDENTITY_PROVIDER_H_
#define GOOGLE_APIS_GAIA_IDENTITY_PROVIDER_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/observer_list.h"
#include "google_apis/gaia/oauth2_token_service.h"
// Helper class that provides access to information about logged-in GAIA
// accounts. Each instance of this class references an entity who may be logged
// in to zero, one or multiple GAIA accounts. The class provides access to the
// OAuth tokens for all logged-in accounts and indicates which of these is
// currently active.
// The main purpose of this abstraction layer is to isolate consumers of GAIA
// information from the different sources and various token service
// implementations. Whenever possible, consumers of GAIA information should be
// provided with an instance of this class instead of accessing other GAIA APIs
// directly.
class IdentityProvider : public OAuth2TokenService::Observer {
public:
class Observer {
public:
// Called when a GAIA account logs in and becomes the active account. All
// account information is available when this method is called and all
// |IdentityProvider| methods will return valid data.
virtual void OnActiveAccountLogin() {}
// Called when the active GAIA account logs out. The account information may
// have been cleared already when this method is called. The
// |IdentityProvider| methods may return inconsistent or outdated
// information if called from within OnLogout().
virtual void OnActiveAccountLogout() {}
protected:
virtual ~Observer();
};
~IdentityProvider() override;
// Adds and removes observers that will be notified of changes to the refresh
// token availability for the active account.
void AddActiveAccountRefreshTokenObserver(
OAuth2TokenService::Observer* observer);
void RemoveActiveAccountRefreshTokenObserver(
OAuth2TokenService::Observer* observer);
// Gets the active account's user name.
virtual std::string GetActiveUsername() = 0;
// Gets the active account's account ID.
virtual std::string GetActiveAccountId() = 0;
// Gets the token service vending OAuth tokens for all logged-in accounts.
virtual OAuth2TokenService* GetTokenService() = 0;
// Requests login to a GAIA account. Implementations can show a login UI, log
// in automatically if sufficient credentials are available or may ignore the
// request. Returns true if the login request was processed and false if it
// was ignored.
virtual bool RequestLogin() = 0;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// OAuth2TokenService::Observer:
void OnRefreshTokenAvailable(const std::string& account_id) override;
void OnRefreshTokenRevoked(const std::string& account_id) override;
void OnRefreshTokensLoaded() override;
protected:
IdentityProvider();
// Fires an OnActiveAccountLogin notification.
void FireOnActiveAccountLogin();
// Fires an OnActiveAccountLogout notification.
void FireOnActiveAccountLogout();
private:
base::ObserverList<Observer, true> observers_;
base::ObserverList<OAuth2TokenService::Observer, true>
token_service_observers_;
int token_service_observer_count_;
DISALLOW_COPY_AND_ASSIGN(IdentityProvider);
};
#endif // GOOGLE_APIS_GAIA_IDENTITY_PROVIDER_H_
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