components/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 COMPONENTS_DRIVE_FILE_SYSTEM_SEARCH_OPERATION_H_
   6 #define COMPONENTS_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 "base/threading/thread_checker.h"
  13 #include "components/drive/file_errors.h"
  14 #include "components/drive/file_system_interface.h"
  15 #include "google_apis/drive/drive_api_error_codes.h"
  16
  17 namespace base {
  18 class SequencedTaskRunner;
  19 }  // namespace base
  20
  21 namespace google_apis {
  22 class FileList;
  23 }  // namespace google_apis
  24
  25 namespace drive {
  26
  27 class JobScheduler;
  28
  29 namespace internal {
  30 class LoaderController;
  31 class ResourceMetadata;
  32 }  // namespace internal
  33
  34 namespace file_system {
  35
  36 // This class encapsulates the drive Search function. It is responsible for
  37 // sending the request to the drive API.
  38 class SearchOperation {
  39  public:
  40   SearchOperation(base::SequencedTaskRunner* blocking_task_runner,
  41                   JobScheduler* scheduler,
  42                   internal::ResourceMetadata* metadata,
  43                   internal::LoaderController* loader_controller);
  44   ~SearchOperation();
  45
  46   // Performs server side content search operation for |search_query|.  If
  47   // |next_link| is set, this is the search result url that will be fetched.
  48   // Upon completion, |callback| will be called with the result.  This is
  49   // implementation of FileSystemInterface::Search() method.
  50   //
  51   // |callback| must not be null.
  52   void Search(const std::string& search_query,
  53               const GURL& next_link,
  54               const SearchCallback& callback);
  55
  56  private:
  57   // Part of Search(), called after the FileList is fetched from the server.
  58   void SearchAfterGetFileList(
  59       const SearchCallback& callback,
  60       google_apis::DriveApiErrorCode gdata_error,
  61       scoped_ptr<google_apis::FileList> file_list);
  62
  63   // Part of Search(), called after |result| is filled on the blocking pool.
  64   void SearchAfterResolveSearchResult(
  65       const SearchCallback& callback,
  66       const GURL& next_link,
  67       scoped_ptr<std::vector<SearchResultInfo> > result,
  68       FileError error);
  69
  70   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  71   JobScheduler* scheduler_;
  72   internal::ResourceMetadata* metadata_;
  73   internal::LoaderController* loader_controller_;
  74
  75   base::ThreadChecker thread_checker_;
  76
  77   // Note: This should remain the last member so it'll be destroyed and
  78   // invalidate the weak pointers before any other members are destroyed.
  79   base::WeakPtrFactory<SearchOperation> weak_ptr_factory_;
  80   DISALLOW_COPY_AND_ASSIGN(SearchOperation);
  81 };
  82
  83 }  // namespace file_system
  84 }  // namespace drive
  85
  86 #endif  // COMPONENTS_DRIVE_FILE_SYSTEM_SEARCH_OPERATION_H_