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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_EXTENSIONS_TOKEN_CACHE_TOKEN_CACHE_SERVICE_H_
      6 #define CHROME_BROWSER_EXTENSIONS_TOKEN_CACHE_TOKEN_CACHE_SERVICE_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/compiler_specific.h"
     13 #include "base/time/time.h"
     14 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
     15 #include "content/public/browser/notification_observer.h"
     16 #include "content/public/browser/notification_registrar.h"
     17 
     18 namespace content {
     19 class NotificationSource;
     20 }
     21 
     22 class Profile;
     23 
     24 namespace extensions {
     25 
     26 // This class caches tokens for the current user.  It will clear tokens out
     27 // when the user logs out or after the specified timeout interval, or when
     28 // the instance of chrome shuts down.
     29 class TokenCacheService : public BrowserContextKeyedService,
     30                           public content::NotificationObserver {
     31  public:
     32   explicit TokenCacheService(Profile* profile);
     33   virtual ~TokenCacheService();
     34 
     35   // Store a token for the currently logged in user. We will look it up later by
     36   // the name given here, and we will expire the token after the timeout.  For a
     37   // timeout of 0, we never expire the token.  After time_to_live expires, the
     38   // token will be expired.
     39   void StoreToken(const std::string& token_name, const std::string& token_value,
     40                   base::TimeDelta time_to_live);
     41 
     42   // Retrieve a token for the currently logged in user.  This returns an empty
     43   // string if the token was not found or timed out.
     44   std::string RetrieveToken(const std::string& token_name);
     45 
     46   // Inherited from NotificationObserver.
     47   virtual void Observe(int type,
     48                        const content::NotificationSource& source,
     49                        const content::NotificationDetails& details) OVERRIDE;
     50 
     51  private:
     52   friend class TokenCacheTest;
     53 
     54   struct TokenCacheData {
     55     std::string token;
     56     base::Time expiration_time;
     57   };
     58 
     59   // Map the token name (string) to token data.
     60   std::map<std::string, TokenCacheData> token_cache_;
     61   content::NotificationRegistrar registrar_;
     62   const Profile* const profile_;
     63 
     64   DISALLOW_COPY_AND_ASSIGN(TokenCacheService);
     65 };
     66 
     67 }  // namespace extensions
     68 
     69 #endif  // CHROME_BROWSER_EXTENSIONS_TOKEN_CACHE_TOKEN_CACHE_SERVICE_H_
     70