src/chrome/browser/chromeos/drive/sync/remove_performer.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_SYNC_REMOVE_PERFORMER_H_
   6 #define CHROME_BROWSER_CHROMEOS_DRIVE_SYNC_REMOVE_PERFORMER_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 "chrome/browser/chromeos/drive/file_errors.h"
  13 #include "google_apis/drive/gdata_errorcode.h"
  14
  15 namespace base {
  16 class SequencedTaskRunner;
  17 }
  18
  19 namespace google_apis {
  20 class FileResource;
  21 }
  22
  23 namespace drive {
  24
  25 class JobScheduler;
  26 class ResourceEntry;
  27 struct ClientContext;
  28
  29 namespace file_system {
  30 class OperationDelegate;
  31 }  // namespace file_system
  32
  33 namespace internal {
  34
  35 class EntryRevertPerformer;
  36 class ResourceMetadata;
  37
  38 // This class encapsulates the drive Remove function.  It is responsible for
  39 // sending the request to the drive API, then updating the local state and
  40 // metadata to reflect the new state.
  41 class RemovePerformer {
  42  public:
  43   RemovePerformer(base::SequencedTaskRunner* blocking_task_runner,
  44                   file_system::OperationDelegate* delegate,
  45                   JobScheduler* scheduler,
  46                   ResourceMetadata* metadata);
  47   ~RemovePerformer();
  48
  49   // Removes the resource.
  50   //
  51   // |callback| must not be null.
  52   void Remove(const std::string& local_id,
  53               const ClientContext& context,
  54               const FileOperationCallback& callback);
  55
  56  private:
  57   // Part of Remove(). Called after GetResourceEntry() completion.
  58   void RemoveAfterGetResourceEntry(const ClientContext& context,
  59                                    const FileOperationCallback& callback,
  60                                    const ResourceEntry* entry,
  61                                    FileError error);
  62
  63   // Requests the server to move the specified resource to the trash.
  64   void TrashResource(const ClientContext& context,
  65                      const FileOperationCallback& callback,
  66                      const std::string& resource_id,
  67                      const std::string& local_id);
  68
  69   // Part of TrashResource(). Called after server-side removal is done.
  70   void TrashResourceAfterUpdateRemoteState(
  71       const ClientContext& context,
  72       const FileOperationCallback& callback,
  73       const std::string& local_id,
  74       google_apis::GDataErrorCode status);
  75
  76   // Requests the server to detach the specified resource from its parent.
  77   void UnparentResource(const ClientContext& context,
  78                         const FileOperationCallback& callback,
  79                         const std::string& resource_id,
  80                         const std::string& local_id);
  81
  82   // Part of UnparentResource().
  83   void UnparentResourceAfterGetFileResource(
  84       const ClientContext& context,
  85       const FileOperationCallback& callback,
  86       const std::string& local_id,
  87       google_apis::GDataErrorCode status,
  88       scoped_ptr<google_apis::FileResource> file_resource);
  89
  90   // Part of UnparentResource().
  91   void UnparentResourceAfterUpdateRemoteState(
  92       const FileOperationCallback& callback,
  93       const std::string& local_id,
  94       google_apis::GDataErrorCode status);
  95
  96   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  97   file_system::OperationDelegate* delegate_;
  98   JobScheduler* scheduler_;
  99   ResourceMetadata* metadata_;
 100   scoped_ptr<EntryRevertPerformer> entry_revert_performer_;
 101
 102   // Note: This should remain the last member so it'll be destroyed and
 103   // invalidate the weak pointers before any other members are destroyed.
 104   base::WeakPtrFactory<RemovePerformer> weak_ptr_factory_;
 105   DISALLOW_COPY_AND_ASSIGN(RemovePerformer);
 106 };
 107
 108 }  // namespace internal
 109 }  // namespace drive
 110
 111 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_SYNC_REMOVE_PERFORMER_H_