components/drive/file_system/remove_operation.h

   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 COMPONENTS_DRIVE_FILE_SYSTEM_REMOVE_OPERATION_H_
   6 #define COMPONENTS_DRIVE_FILE_SYSTEM_REMOVE_OPERATION_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/threading/thread_checker.h"
  13 #include "components/drive/file_errors.h"
  14 #include "google_apis/drive/drive_api_error_codes.h"
  15
  16 namespace base {
  17 class FilePath;
  18 class SequencedTaskRunner;
  19 }  // namespace base
  20
  21 namespace drive {
  22
  23 class ResourceEntry;
  24
  25 namespace internal {
  26 class FileCache;
  27 class ResourceMetadata;
  28 }  // namespace internal
  29
  30 namespace file_system {
  31
  32 class OperationDelegate;
  33
  34 // This class encapsulates the drive Remove function.  It is responsible for
  35 // moving the removed entry to the trash.
  36 class RemoveOperation {
  37  public:
  38   RemoveOperation(base::SequencedTaskRunner* blocking_task_runner,
  39                   OperationDelegate* delegate,
  40                   internal::ResourceMetadata* metadata,
  41                   internal::FileCache* cache);
  42   ~RemoveOperation();
  43
  44   // Removes the resource at |path|. If |path| is a directory and |is_recursive|
  45   // is set, it recursively removes all the descendants. If |is_recursive| is
  46   // not set, it succeeds only when the directory is empty.
  47   //
  48   // |callback| must not be null.
  49   void Remove(const base::FilePath& path,
  50               bool is_recursive,
  51               const FileOperationCallback& callback);
  52
  53  private:
  54   // Part of Remove(). Called after UpdateLocalState() completion.
  55   void RemoveAfterUpdateLocalState(const FileOperationCallback& callback,
  56                                    const std::string* local_id,
  57                                    const ResourceEntry* entry,
  58                                    const base::FilePath* changed_directory_path,
  59                                    FileError error);
  60
  61   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  62   OperationDelegate* delegate_;
  63   internal::ResourceMetadata* metadata_;
  64   internal::FileCache* cache_;
  65
  66   base::ThreadChecker thread_checker_;
  67
  68   // Note: This should remain the last member so it'll be destroyed and
  69   // invalidate the weak pointers before any other members are destroyed.
  70   base::WeakPtrFactory<RemoveOperation> weak_ptr_factory_;
  71   DISALLOW_COPY_AND_ASSIGN(RemoveOperation);
  72 };
  73
  74 }  // namespace file_system
  75 }  // namespace drive
  76
  77 #endif  // COMPONENTS_DRIVE_FILE_SYSTEM_REMOVE_OPERATION_H_