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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_BASE_OAUTH_TOKEN_GETTER_IMPL_H_
#define REMOTING_BASE_OAUTH_TOKEN_GETTER_IMPL_H_
#include "base/containers/queue.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "google_apis/gaia/gaia_oauth_client.h"
#include "remoting/base/oauth_token_getter.h"
namespace network {
class SharedURLLoaderFactory;
} // namespace network
namespace remoting {
// OAuthTokenGetter accepts an authorization code in the intermediate
// credentials or a refresh token in the authorization credentials. It will
// convert authorization code into a refresh token and access token.
// OAuthTokenGetter will exchange refresh tokens for access tokens and will
// cache access tokens, refreshing them as needed.
// On first usage it is likely an application will only have an auth code,
// from this you can get a refresh token which can be reused next app launch.
class OAuthTokenGetterImpl : public OAuthTokenGetter,
public gaia::GaiaOAuthClient::Delegate {
public:
// |auto_refresh|: If true, automatically refresh the access token when it is
// about to expire; otherwise refresh the access token only when
// CallWithToken() is called while the cached token has expired.
OAuthTokenGetterImpl(
std::unique_ptr<OAuthAuthorizationCredentials> authorization_credentials,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
bool auto_refresh);
~OAuthTokenGetterImpl() override;
// OAuthTokenGetter interface.
void CallWithToken(OAuthTokenGetter::TokenCallback on_access_token) override;
void InvalidateCache() override;
base::WeakPtr<OAuthTokenGetter> GetWeakPtr() override;
private:
// gaia::GaiaOAuthClient::Delegate interface.
void OnGetTokensResponse(const std::string& user_email,
const std::string& access_token,
int expires_seconds) override;
void OnRefreshTokenResponse(const std::string& access_token,
int expires_in_seconds) override;
void OnGetUserEmailResponse(const std::string& user_email) override;
void OnOAuthError() override;
void OnNetworkError(int response_code) override;
void UpdateAccessToken(const std::string& access_token, int expires_seconds);
void NotifyTokenCallbacks(Status status, const OAuthTokenInfo& token_info);
void GetOAuthTokensFromAuthCode();
void RefreshAccessToken();
bool IsResponsePending() const;
void SetResponsePending(bool is_pending);
void OnResponseTimeout();
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
std::unique_ptr<OAuthIntermediateCredentials> intermediate_credentials_;
std::unique_ptr<OAuthAuthorizationCredentials> authorization_credentials_;
std::unique_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
bool email_verified_ = false;
bool email_discovery_ = false;
std::string oauth_access_token_;
std::string scopes_;
base::Time access_token_expiry_time_;
base::queue<OAuthTokenGetter::TokenCallback> pending_callbacks_;
std::unique_ptr<base::OneShotTimer> refresh_timer_;
base::OneShotTimer response_timeout_timer_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<OAuthTokenGetterImpl> weak_factory_{this};
};
} // namespace remoting
#endif // REMOTING_BASE_OAUTH_TOKEN_GETTER_IMPL_H_
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