chrome/browser/media_galleries/fileapi/iapps_data_provider.cc

   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 #include "chrome/browser/media_galleries/fileapi/iapps_data_provider.h"
   6
   7 #include <map>
   8
   9 #include "base/bind.h"
  10 #include "base/callback.h"
  11 #include "base/format_macros.h"
  12 #include "base/location.h"
  13 #include "base/logging.h"
  14 #include "base/stl_util.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/threading/thread_restrictions.h"
  18 #include "chrome/browser/media_galleries/fileapi/file_path_watcher_util.h"
  19 #include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
  20 #include "chrome/common/media_galleries/itunes_library.h"
  21 #include "storage/browser/fileapi/native_file_util.h"
  22 #include "third_party/icu/source/common/unicode/locid.h"
  23
  24 namespace iapps {
  25
  26 IAppsDataProvider::IAppsDataProvider(const base::FilePath& library_path)
  27     : library_path_(library_path),
  28       needs_refresh_(true),
  29       is_valid_(false),
  30       weak_factory_(this) {
  31   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
  32   DCHECK(!library_path_.empty());
  33
  34   StartFilePathWatchOnMediaTaskRunner(
  35       library_path_,
  36       base::Bind(&IAppsDataProvider::OnLibraryWatchStarted,
  37                  weak_factory_.GetWeakPtr()),
  38       base::Bind(&IAppsDataProvider::OnLibraryChanged,
  39                  weak_factory_.GetWeakPtr()));
  40 }
  41
  42 IAppsDataProvider::~IAppsDataProvider() {}
  43
  44 bool IAppsDataProvider::valid() const {
  45   return is_valid_;
  46 }
  47
  48 void IAppsDataProvider::set_valid(bool valid) {
  49   is_valid_ = valid;
  50 }
  51
  52 void IAppsDataProvider::RefreshData(const ReadyCallback& ready_callback) {
  53   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
  54   if (!needs_refresh_) {
  55     ready_callback.Run(valid());
  56     return;
  57   }
  58
  59   // TODO(gbillock): this needs re-examination. Could be a refresh bug.
  60   needs_refresh_ = false;
  61   DoParseLibrary(library_path_, ready_callback);
  62 }
  63
  64 const base::FilePath& IAppsDataProvider::library_path() const {
  65   return library_path_;
  66 }
  67
  68 void IAppsDataProvider::OnLibraryWatchStarted(
  69     scoped_ptr<base::FilePathWatcher> library_watcher) {
  70   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
  71   library_watcher_.reset(library_watcher.release());
  72 }
  73
  74 void IAppsDataProvider::OnLibraryChanged(const base::FilePath& path,
  75                                          bool error) {
  76   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
  77   DCHECK_EQ(library_path_.value(), path.value());
  78   if (error)
  79     LOG(ERROR) << "Error watching " << library_path_.value();
  80   needs_refresh_ = true;
  81 }
  82
  83 }  // namespace iapps