Home | History | Annotate | Download | only in file_system 
      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_DRIVE_FILE_SYSTEM_UPDATE_OPERATION_H_
      6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_UPDATE_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 "chrome/browser/chromeos/drive/file_errors.h"
     13 #include "google_apis/drive/gdata_errorcode.h"
     14 
     15 namespace base {
     16 class FilePath;
     17 class SequencedTaskRunner;
     18 }  // namespace base
     19 
     20 namespace google_apis {
     21 class ResourceEntry;
     22 }  // namespace google_apis
     23 
     24 namespace drive {
     25 
     26 class JobScheduler;
     27 class ResourceEntry;
     28 struct ClientContext;
     29 
     30 namespace internal {
     31 class FileCache;
     32 class ResourceMetadata;
     33 }  // namespace internal
     34 
     35 namespace file_system {
     36 
     37 class OperationObserver;
     38 
     39 // This class encapsulates the drive Update function.  It is responsible for
     40 // sending the request to the drive API, then updating the local state and
     41 // metadata to reflect the new state.
     42 class UpdateOperation {
     43  public:
     44   UpdateOperation(base::SequencedTaskRunner* blocking_task_runner,
     45                   OperationObserver* observer,
     46                   JobScheduler* scheduler,
     47                   internal::ResourceMetadata* metadata,
     48                   internal::FileCache* cache);
     49   ~UpdateOperation();
     50 
     51   // Flags to specify whether the md5 checksum should be compared to the value
     52   // stored in metadata. If |RUN_CONTENT_CHECK| is set, the check is run and the
     53   // upload takes place only when there is a mismatch in the checksum.
     54   enum ContentCheckMode {
     55     NO_CONTENT_CHECK,
     56     RUN_CONTENT_CHECK,
     57   };
     58 
     59   // Updates a file by the given |local_id| on the Drive server by
     60   // uploading an updated version. Used for uploading dirty files. The file
     61   // should already be present in the cache.
     62   //
     63   // |callback| must not be null.
     64   void UpdateFileByLocalId(const std::string& local_id,
     65                            const ClientContext& context,
     66                            ContentCheckMode check,
     67                            const FileOperationCallback& callback);
     68 
     69   struct LocalState;
     70 
     71  private:
     72   void UpdateFileAfterGetLocalState(const ClientContext& context,
     73                                     const FileOperationCallback& callback,
     74                                     const LocalState* local_state,
     75                                     FileError error);
     76 
     77   void UpdateFileAfterUpload(
     78       const FileOperationCallback& callback,
     79       const std::string& local_id,
     80       google_apis::GDataErrorCode error,
     81       scoped_ptr<google_apis::ResourceEntry> resource_entry);
     82 
     83   void UpdateFileAfterUpdateLocalState(const FileOperationCallback& callback,
     84                                        const base::FilePath* drive_file_path,
     85                                        FileError error);
     86 
     87   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
     88   OperationObserver* observer_;
     89   JobScheduler* scheduler_;
     90   internal::ResourceMetadata* metadata_;
     91   internal::FileCache* cache_;
     92 
     93   // Note: This should remain the last member so it'll be destroyed and
     94   // invalidate the weak pointers before any other members are destroyed.
     95   base::WeakPtrFactory<UpdateOperation> weak_ptr_factory_;
     96   DISALLOW_COPY_AND_ASSIGN(UpdateOperation);
     97 };
     98 
     99 }  // namespace file_system
    100 }  // namespace drive
    101 
    102 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_UPDATE_OPERATION_H_
    103