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      1 // Copyright (c) 2012 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_POLICY_USER_POLICY_TOKEN_LOADER_H_
      6 #define CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TOKEN_LOADER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/files/file_path.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "base/memory/weak_ptr.h"
     14 
     15 namespace policy {
     16 
     17 // Handles disk access and threading details for loading and storing tokens.
     18 // This is legacy-support code that reads the token from its prior location
     19 // within the profile directory new code keeps the token in the policy blob
     20 // maintained by session_manager.
     21 class UserPolicyTokenLoader
     22     : public base::RefCountedThreadSafe<UserPolicyTokenLoader> {
     23  public:
     24   // Callback interface for reporting a successful load.
     25   class Delegate {
     26    public:
     27     virtual ~Delegate();
     28     virtual void OnTokenLoaded(const std::string& token,
     29                                const std::string& device_id) = 0;
     30   };
     31 
     32   UserPolicyTokenLoader(const base::WeakPtr<Delegate>& delegate,
     33                         const base::FilePath& cache_file);
     34 
     35   // Starts loading the disk cache. After the load is finished, the result is
     36   // reported through the delegate.
     37   void Load();
     38 
     39  private:
     40   friend class base::RefCountedThreadSafe<UserPolicyTokenLoader>;
     41   ~UserPolicyTokenLoader();
     42 
     43   void LoadOnFileThread();
     44   void NotifyOnUIThread(const std::string& token,
     45                         const std::string& device_id);
     46 
     47   const base::WeakPtr<Delegate> delegate_;
     48   const base::FilePath cache_file_;
     49 
     50   DISALLOW_COPY_AND_ASSIGN(UserPolicyTokenLoader);
     51 };
     52 
     53 }  // namespace policy
     54 
     55 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TOKEN_LOADER_H_
     56