search_operation.h revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7 
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
16namespace base {
17class SequencedTaskRunner;
18}  // namespace base
19
20namespace google_apis {
21class ResourceEntry;
22class ResourceList;
23}  // namespace google_apis
24
25namespace drive {
26
27class JobScheduler;
28
29namespace internal {
30class ResourceMetadata;
31}  // namespace internal
32
33namespace file_system {
34
35// This class encapsulates the drive Search function. It is responsible for
36// sending the request to the drive API.
37class 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_
82