Moving oauth code from host to base to allow code sharing between host and client.

remoting/host/setup/gaia_oauth_client.h

-// Copyright 2013 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 REMOTING_HOST_SETUP_GAIA_OAUTH_CLIENT_H_
-#define REMOTING_HOST_SETUP_GAIA_OAUTH_CLIENT_H_
-
-#include <queue>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "google_apis/gaia/gaia_oauth_client.h"
-#include "net/url_request/url_request_context_getter.h"
-
-#include "remoting/host/setup/oauth_client.h"
-
-namespace remoting {
-
-// A wrapper around gaia::GaiaOAuthClient that provides a more
-// convenient interface, with queueing of requests and a callback
-// rather than a delegate.
-class GaiaOAuthClient : public OAuthClient,
-                        public gaia::GaiaOAuthClient::Delegate {
- public:
-  GaiaOAuthClient(
-      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
-
-  ~GaiaOAuthClient() override;
-
-  // Redeems |auth_code| using |oauth_client_info| to obtain |refresh_token| and
-  // |access_token|, then uses the userinfo endpoint to obtain |user_email|.
-  // Calls CompletionCallback with |user_email| and |refresh_token| when done,
-  // or with empty strings on error.
-  // If a request is received while another one is  being processed, it is
-  // enqueued and processed after the first one is finished.
-  void GetCredentialsFromAuthCode(
-      const gaia::OAuthClientInfo& oauth_client_info,
-      const std::string& auth_code,
-      bool need_user_email,
-      CompletionCallback on_done) override;
-
-  // gaia::GaiaOAuthClient::Delegate
-  void OnGetTokensResponse(const std::string& refresh_token,
-                           const std::string& access_token,
-                           int expires_in_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;
-
- private:
-  struct Request {
-    Request(const gaia::OAuthClientInfo& oauth_client_info,
-            const std::string& auth_code,
-            bool need_user_email,
-            CompletionCallback on_done);
-    Request(const Request& other);
-    virtual ~Request();
-    gaia::OAuthClientInfo oauth_client_info;
-    std::string auth_code;
-    bool need_user_email;
-    CompletionCallback on_done;
-  };
-
-  void SendResponse(const std::string& user_email,
-                    const std::string& refresh_token);
-
-  std::queue<Request> pending_requests_;
-  gaia::GaiaOAuthClient gaia_oauth_client_;
-  std::string refresh_token_;
-  bool need_user_email_;
-  CompletionCallback on_done_;
-
-  DISALLOW_COPY_AND_ASSIGN(GaiaOAuthClient);
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_SETUP_GAIA_OAUTH_CLIENT_H_