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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_TOKEN_FETCHER_H_
      6 #define CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_TOKEN_FETCHER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/callback_forward.h"
     12 #include "base/compiler_specific.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "google_apis/gaia/gaia_auth_consumer.h"
     15 #include "google_apis/gaia/gaia_auth_fetcher.h"
     16 
     17 namespace net {
     18 class URLRequestContextGetter;
     19 }
     20 
     21 namespace chromeos {
     22 
     23 // OAuth2TokenFetcher is used to convert authenticated cookie jar from the
     24 // authentication profile into OAuth2 tokens and GAIA credentials that will be
     25 // used to kick off other token retrieval tasks.
     26 class OAuth2TokenFetcher : public base::SupportsWeakPtr<OAuth2TokenFetcher>,
     27                            public GaiaAuthConsumer {
     28  public:
     29   class Delegate {
     30    public:
     31     virtual ~Delegate() {}
     32     virtual void OnOAuth2TokensAvailable(
     33         const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) = 0;
     34     virtual void OnOAuth2TokensFetchFailed() = 0;
     35   };
     36 
     37   OAuth2TokenFetcher(OAuth2TokenFetcher::Delegate* delegate,
     38                      net::URLRequestContextGetter* context_getter);
     39   virtual ~OAuth2TokenFetcher();
     40 
     41   void StartExchangeFromCookies();
     42   void StartExchangeFromAuthCode(const std::string& auth_code);
     43 
     44  private:
     45   // Decides how to proceed on GAIA |error|. If the error looks temporary,
     46   // retries |task| until max retry count is reached.
     47   // If retry count runs out, or error condition is unrecoverable, it runs
     48   // |error_handler|.
     49   void RetryOnError(const GoogleServiceAuthError& error,
     50                     const base::Closure& task,
     51                     const base::Closure& error_handler);
     52 
     53   // GaiaAuthConsumer overrides.
     54   virtual void OnClientOAuthSuccess(
     55       const GaiaAuthConsumer::ClientOAuthResult& result) OVERRIDE;
     56   virtual void OnClientOAuthFailure(
     57       const GoogleServiceAuthError& error) OVERRIDE;
     58 
     59   OAuth2TokenFetcher::Delegate* delegate_;
     60   GaiaAuthConsumer::ClientOAuthResult oauth_tokens_;
     61   GaiaAuthFetcher auth_fetcher_;
     62 
     63   // The retry counter. Increment this only when failure happened.
     64   int retry_count_;
     65   std::string auth_code_;
     66 
     67   DISALLOW_COPY_AND_ASSIGN(OAuth2TokenFetcher);
     68 };
     69 
     70 }  // namespace chromeos
     71 
     72 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_TOKEN_FETCHER_H_
     73