chrome/browser/chromeos/file_system_provider/operations/operation.h

   1 // Copyright 2014 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_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_
   6 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_
   7
   8 #include <string>
   9
  10 #include "base/files/file.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
  13 #include "chrome/browser/chromeos/file_system_provider/request_manager.h"
  14 #include "storage/browser/fileapi/async_file_util.h"
  15
  16 namespace base {
  17 class ListValue;
  18 }  // namespace base
  19
  20 namespace extensions {
  21 struct Event;
  22 class EventRouter;
  23 }  // namespace extensions
  24
  25 namespace chromeos {
  26 namespace file_system_provider {
  27 namespace operations {
  28
  29 // Base class for operation bridges between fileapi and providing extensions.
  30 class Operation : public RequestManager::HandlerInterface {
  31  public:
  32   typedef base::Callback<bool(scoped_ptr<extensions::Event> event)>
  33       DispatchEventImplCallback;
  34
  35   Operation(extensions::EventRouter* event_router,
  36             const ProvidedFileSystemInfo& file_system_info);
  37   ~Operation() override;
  38
  39   // RequestManager::HandlerInterface overrides.
  40   bool Execute(int request_id) override = 0;
  41   void OnSuccess(int request_id,
  42                  scoped_ptr<RequestValue> result,
  43                  bool has_more) override = 0;
  44   void OnError(int request_id,
  45                scoped_ptr<RequestValue> result,
  46                base::File::Error error) override = 0;
  47
  48   // Sets custom dispatchign event implementation for tests.
  49   void SetDispatchEventImplForTesting(
  50       const DispatchEventImplCallback& callback);
  51
  52  protected:
  53   // Sends an event to the providing extension. Returns false, if the providing
  54   // extension does not handle the |event_name| event.
  55   bool SendEvent(int request_id,
  56                  const std::string& event_name,
  57                  scoped_ptr<base::ListValue> event_args);
  58
  59   ProvidedFileSystemInfo file_system_info_;
  60
  61  private:
  62   DispatchEventImplCallback dispatch_event_impl_;
  63   DISALLOW_COPY_AND_ASSIGN(Operation);
  64 };
  65
  66 }  // namespace operations
  67 }  // namespace file_system_provider
  68 }  // namespace chromeos
  69
  70 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_