chrome/browser/chromeos/drive/file_system/search_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_SEARCH_OPERATION_H_
   6 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_SEARCH_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 "chrome/browser/chromeos/drive/file_system_interface.h"
  14 #include "google_apis/drive/drive_api_error_codes.h"
  15
  16 namespace base {
  17 class SequencedTaskRunner;
  18 }  // namespace base
  19
  20 namespace google_apis {
  21 class FileList;
  22 }  // namespace google_apis
  23
  24 namespace drive {
  25
  26 class JobScheduler;
  27
  28 namespace internal {
  29 class LoaderController;
  30 class ResourceMetadata;
  31 }  // namespace internal
  32
  33 namespace file_system {
  34
  35 // This class encapsulates the drive Search function. It is responsible for
  36 // sending the request to the drive API.
  37 class SearchOperation {
  38  public:
  39   SearchOperation(base::SequencedTaskRunner* blocking_task_runner,
  40                   JobScheduler* scheduler,
  41                   internal::ResourceMetadata* metadata,
  42                   internal::LoaderController* loader_controller);
  43   ~SearchOperation();
  44
  45   // Performs server side content search operation for |search_query|.  If
  46   // |next_link| is set, this is the search result url that will be fetched.
  47   // Upon completion, |callback| will be called with the result.  This is
  48   // implementation of FileSystemInterface::Search() method.
  49   //
  50   // |callback| must not be null.
  51   void Search(const std::string& search_query,
  52               const GURL& next_link,
  53               const SearchCallback& callback);
  54
  55  private:
  56   // Part of Search(), called after the FileList is fetched from the server.
  57   void SearchAfterGetFileList(
  58       const SearchCallback& callback,
  59       google_apis::DriveApiErrorCode gdata_error,
  60       scoped_ptr<google_apis::FileList> file_list);
  61
  62   // Part of Search(), called after |result| is filled on the blocking pool.
  63   void SearchAfterResolveSearchResult(
  64       const SearchCallback& callback,
  65       const GURL& next_link,
  66       scoped_ptr<std::vector<SearchResultInfo> > result,
  67       FileError error);
  68
  69   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  70   JobScheduler* scheduler_;
  71   internal::ResourceMetadata* metadata_;
  72   internal::LoaderController* loader_controller_;
  73
  74   // Note: This should remain the last member so it'll be destroyed and
  75   // invalidate the weak pointers before any other members are destroyed.
  76   base::WeakPtrFactory<SearchOperation> weak_ptr_factory_;
  77   DISALLOW_COPY_AND_ASSIGN(SearchOperation);
  78 };
  79
  80 }  // namespace file_system
  81 }  // namespace drive
  82
  83 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_SEARCH_OPERATION_H_