src/chrome/browser/chromeos/drive/file_system/create_file_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_CREATE_FILE_OPERATION_H_
   6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CREATE_FILE_OPERATION_H_
   7
   8 #include "base/basictypes.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 }  // namespace base
  17
  18 namespace drive {
  19
  20 namespace internal {
  21 class ResourceMetadata;
  22 }  // namespace internal
  23
  24 class ResourceEntry;
  25
  26 namespace file_system {
  27
  28 class OperationDelegate;
  29
  30 // This class encapsulates the drive CreateFile function.  It is responsible for
  31 // sending the request to the drive API, then updating the local state and
  32 // metadata to reflect the new state.
  33 class CreateFileOperation {
  34  public:
  35   CreateFileOperation(base::SequencedTaskRunner* blocking_task_runner,
  36                       OperationDelegate* delegate,
  37                       internal::ResourceMetadata* metadata);
  38   ~CreateFileOperation();
  39
  40   // Creates an empty file at |file_path|. When the file
  41   // already exists at that path, the operation fails if |is_exclusive| is true,
  42   // and it succeeds without doing anything if the flag is false.
  43   // If |mime_type| is non-empty, it is used as the mime type of the entry. If
  44   // the parameter is empty, the type is guessed from |file_path|.
  45   //
  46   // |callback| must not be null.
  47   void CreateFile(const base::FilePath& file_path,
  48                   bool is_exclusive,
  49                   const std::string& mime_type,
  50                   const FileOperationCallback& callback);
  51
  52  private:
  53   // Part of CreateFile(). Called after the updating local state is completed.
  54   void CreateFileAfterUpdateLocalState(const FileOperationCallback& callback,
  55                                        const base::FilePath& file_path,
  56                                        bool is_exclusive,
  57                                        ResourceEntry* entry,
  58                                        FileError error);
  59
  60   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  61   OperationDelegate* delegate_;
  62   internal::ResourceMetadata* metadata_;
  63
  64   // Note: This should remain the last member so it'll be destroyed and
  65   // invalidate the weak pointers before any other members are destroyed.
  66   base::WeakPtrFactory<CreateFileOperation> weak_ptr_factory_;
  67   DISALLOW_COPY_AND_ASSIGN(CreateFileOperation);
  68 };
  69
  70 }  // namespace file_system
  71 }  // namespace drive
  72
  73 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CREATE_FILE_OPERATION_H_