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 "extensions/browser/extension_event_histogram_value.h"
  15 #include "storage/browser/fileapi/async_file_util.h"
  16
  17 namespace base {
  18 class ListValue;
  19 }
  20
  21 namespace extensions {
  22 struct Event;
  23 class EventRouter;
  24 }
  25
  26 namespace chromeos {
  27 namespace file_system_provider {
  28 namespace operations {
  29
  30 // Base class for operation bridges between fileapi and providing extensions.
  31 class Operation : public RequestManager::HandlerInterface {
  32  public:
  33   typedef base::Callback<bool(scoped_ptr<extensions::Event> event)>
  34       DispatchEventImplCallback;
  35
  36   Operation(extensions::EventRouter* event_router,
  37             const ProvidedFileSystemInfo& file_system_info);
  38   ~Operation() override;
  39
  40   // RequestManager::HandlerInterface overrides.
  41   bool Execute(int request_id) override = 0;
  42   void OnSuccess(int request_id,
  43                  scoped_ptr<RequestValue> result,
  44                  bool has_more) override = 0;
  45   void OnError(int request_id,
  46                scoped_ptr<RequestValue> result,
  47                base::File::Error error) override = 0;
  48
  49   // Sets custom dispatchign event implementation for tests.
  50   void SetDispatchEventImplForTesting(
  51       const DispatchEventImplCallback& callback);
  52
  53  protected:
  54   // Sends an event to the providing extension. Returns false, if the providing
  55   // extension does not handle the |event_name| event.
  56   bool SendEvent(int request_id,
  57                  extensions::events::HistogramValue histogram_value,
  58                  const std::string& event_name,
  59                  scoped_ptr<base::ListValue> event_args);
  60
  61   ProvidedFileSystemInfo file_system_info_;
  62
  63  private:
  64   DispatchEventImplCallback dispatch_event_impl_;
  65   DISALLOW_COPY_AND_ASSIGN(Operation);
  66 };
  67
  68 }  // namespace operations
  69 }  // namespace file_system_provider
  70 }  // namespace chromeos
  71
  72 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_