chrome/browser/chromeos/drive/file_system/touch_operation.h

   1 // Copyright 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_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_
   6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "chrome/browser/chromeos/drive/file_errors.h"
  12
  13 namespace base {
  14 class FilePath;
  15 class SequencedTaskRunner;
  16 class Time;
  17 }  // namespace base
  18
  19 namespace drive {
  20 namespace internal {
  21 class ResourceMetadata;
  22 }  // namespace internal
  23
  24 class ResourceEntry;
  25
  26 namespace file_system {
  27
  28 class OperationDelegate;
  29
  30 class TouchOperation {
  31  public:
  32   TouchOperation(base::SequencedTaskRunner* blocking_task_runner,
  33                  OperationDelegate* delegate,
  34                  internal::ResourceMetadata* metadata);
  35   ~TouchOperation();
  36
  37   // Touches the file by updating last access time and last modified time.
  38   // Upon completion, invokes |callback|.
  39   // |last_access_time|, |last_modified_time| and |callback| must not be null.
  40   void TouchFile(const base::FilePath& file_path,
  41                  const base::Time& last_access_time,
  42                  const base::Time& last_modified_time,
  43                  const FileOperationCallback& callback);
  44
  45  private:
  46   // Part of TouchFile(). Runs after updating the local state.
  47   void TouchFileAfterUpdateLocalState(const base::FilePath& file_path,
  48                                       const FileOperationCallback& callback,
  49                                       const ResourceEntry* entry,
  50                                       FileError error);
  51
  52   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  53   OperationDelegate* delegate_;
  54   internal::ResourceMetadata* metadata_;
  55
  56   // Note: This should remain the last member so it'll be destroyed and
  57   // invalidate the weak pointers before any other members are destroyed.
  58   base::WeakPtrFactory<TouchOperation> weak_ptr_factory_;
  59   DISALLOW_COPY_AND_ASSIGN(TouchOperation);
  60 };
  61
  62 }  // namespace file_system
  63 }  // namespace drive
  64
  65 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_