src/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/gdata_errorcode.h"
  15
  16 namespace base {
  17 class SequencedTaskRunner;
  18 }  // namespace base
  19
  20 namespace google_apis {
  21 class ResourceEntry;
  22 class ResourceList;
  23 }  // namespace google_apis
  24
  25 namespace drive {
  26
  27 class JobScheduler;
  28
  29 namespace internal {
  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   ~SearchOperation();
  43
  44   // Performs server side content search operation for |search_query|.  If
  45   // |next_link| is set, this is the search result url that will be fetched.
  46   // Upon completion, |callback| will be called with the result.  This is
  47   // implementation of FileSystemInterface::Search() method.
  48   //
  49   // |callback| must not be null.
  50   void Search(const std::string& search_query,
  51               const GURL& next_link,
  52               const SearchCallback& callback);
  53
  54  private:
  55   // Part of Search(), called after the ResourceList is fetched from the server.
  56   void SearchAfterGetResourceList(
  57       const SearchCallback& callback,
  58       google_apis::GDataErrorCode gdata_error,
  59       scoped_ptr<google_apis::ResourceList> resource_list);
  60
  61   // Part of Search(), called after |result| is filled on the blocking pool.
  62   void SearchAfterResolveSearchResult(
  63       const SearchCallback& callback,
  64       const GURL& next_link,
  65       scoped_ptr<std::vector<SearchResultInfo> > result,
  66       FileError error);
  67
  68   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
  69   JobScheduler* scheduler_;
  70   internal::ResourceMetadata* metadata_;
  71
  72   // Note: This should remain the last member so it'll be destroyed and
  73   // invalidate the weak pointers before any other members are destroyed.
  74   base::WeakPtrFactory<SearchOperation> weak_ptr_factory_;
  75   DISALLOW_COPY_AND_ASSIGN(SearchOperation);
  76 };
  77
  78 }  // namespace file_system
  79 }  // namespace drive
  80
  81 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_SEARCH_OPERATION_H_