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