1 files changed, 79 insertions, 0 deletions
diff --git a/remoting/host/setup/oauth_client.h b/remoting/host/setup/oauth_client.h
new file mode 100644
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+++ b/remoting/host/setup/oauth_client.h
@@ -0,0 +1,79 @@
+// 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_OAUTH_CLIENT
+#define REMOTING_HOST_SETUP_OAUTH_CLIENT
+
+#include <queue>
+#include <string>
+
+#include "base/callback.h"
+#include "google_apis/gaia/gaia_oauth_client.h"
+#include "remoting/base/url_request_context.h"
+
+namespace remoting {
+
+// A wrapper around GaiaOAuthClient that provides a more convenient interface,
+// with queueing of requests and a callback rather than a delegate.
+class OAuthClient : public gaia::GaiaOAuthClient::Delegate {
+ public:
+  // Called when GetCredentialsFromAuthCode is completed, with the |user_email|
+  // and |refresh_token| that correspond to the given |auth_code|, or with empty
+  // strings on error.
+  typedef base::Callback<void(
+      const std::string& user_email,
+      const std::string& refresh_token)> CompletionCallback;
+
+  OAuthClient(
+      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
+
+  virtual ~OAuthClient();
+
+  // 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,
+      CompletionCallback on_done);
+
+  // gaia::GaiaOAuthClient::Delegate
+  virtual void OnGetTokensResponse(const std::string& refresh_token,
+                                 const std::string& access_token,
+                                 int expires_in_seconds) OVERRIDE;
+  virtual void OnRefreshTokenResponse(const std::string& access_token,
+                                      int expires_in_seconds) OVERRIDE;
+  virtual void OnGetUserEmailResponse(const std::string& user_email) OVERRIDE;
+
+  virtual void OnOAuthError() OVERRIDE;
+  virtual void OnNetworkError(int response_code) OVERRIDE;
+
+ private:
+  struct Request {
+    Request(const gaia::OAuthClientInfo& oauth_client_info,
+            const std::string& auth_code,
+            CompletionCallback on_done);
+    virtual ~Request();
+    gaia::OAuthClientInfo oauth_client_info;
+    std::string auth_code;
+    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_;
+  CompletionCallback on_done_;
+
+  DISALLOW_COPY_AND_ASSIGN(OAuthClient);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_SETUP_OAUTH_CLIENT