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