Media Galleries API Picasa: Move Picasa source files to correct location.

chrome/browser/media_galleries/fileapi/picasa/picasa_data_provider.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/media_galleries/fileapi/picasa/picasa_data_provider.h"
-
-#include <utility>
-
-#include "base/basictypes.h"
-#include "base/bind_helpers.h"
-#include "base/callback.h"
-#include "base/file_util.h"
-#include "base/strings/stringprintf.h"
-#include "chrome/browser/media_galleries/fileapi/file_path_watcher_util.h"
-#include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
-#include "chrome/browser/media_galleries/fileapi/safe_picasa_album_table_reader.h"
-#include "chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.h"
-#include "chrome/browser/media_galleries/imported_media_gallery_registry.h"
-#include "webkit/browser/fileapi/file_system_operation_context.h"
-#include "webkit/browser/fileapi/file_system_url.h"
-
-using chrome::MediaFileSystemBackend;
-
-namespace picasa {
-
-namespace {
-
-void RunAllCallbacks(
-    std::queue<PicasaDataProvider::ReadyCallback>* ready_callbacks_queue,
-    bool success) {
-  while (!ready_callbacks_queue->empty()) {
-    ready_callbacks_queue->front().Run(success);
-    ready_callbacks_queue->pop();
-  }
-}
-
-}  // namespace
-
-PicasaDataProvider::PicasaDataProvider(const base::FilePath& database_path)
-    : database_path_(database_path),
-      state_(STALE_DATA_STATE),
-      weak_factory_(this) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-
-  chrome::StartFilePathWatchOnMediaTaskRunner(
-      database_path_.DirName().AppendASCII(kPicasaTempDirName),
-      base::Bind(&PicasaDataProvider::OnTempDirWatchStarted,
-                 weak_factory_.GetWeakPtr()),
-      base::Bind(&PicasaDataProvider::OnTempDirChanged,
-                 weak_factory_.GetWeakPtr()));
-}
-
-PicasaDataProvider::~PicasaDataProvider() {}
-
-void PicasaDataProvider::RefreshData(DataType needed_data,
-                                     const ReadyCallback& ready_callback) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  // TODO(tommycli): Need to watch the database_path_ folder and handle
-  // rereading the data when it changes.
-
-  if (state_ == INVALID_DATA_STATE) {
-    ready_callback.Run(false /* success */);
-    return;
-  }
-
-  if (needed_data == LIST_OF_ALBUMS_AND_FOLDERS_DATA) {
-    if (state_ == LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE ||
-        state_ == ALBUMS_IMAGES_FRESH_STATE) {
-      ready_callback.Run(true /* success */);
-      return;
-    }
-    album_list_ready_callbacks_.push(ready_callback);
-  } else {
-    if (state_ == ALBUMS_IMAGES_FRESH_STATE) {
-      ready_callback.Run(true /* success */);
-      return;
-    }
-    albums_index_ready_callbacks_.push(ready_callback);
-  }
-  DoRefreshIfNecessary();
-}
-
-scoped_ptr<AlbumMap> PicasaDataProvider::GetFolders() {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  DCHECK(state_ == LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE ||
-         state_ == ALBUMS_IMAGES_FRESH_STATE);
-  return make_scoped_ptr(new AlbumMap(folder_map_));
-}
-
-scoped_ptr<AlbumMap> PicasaDataProvider::GetAlbums() {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  DCHECK(state_ == LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE ||
-         state_ == ALBUMS_IMAGES_FRESH_STATE);
-  return make_scoped_ptr(new AlbumMap(album_map_));
-}
-
-scoped_ptr<AlbumImages> PicasaDataProvider::FindAlbumImages(
-    const std::string& key,
-    base::PlatformFileError* error) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  DCHECK(state_ == ALBUMS_IMAGES_FRESH_STATE);
-  DCHECK(error);
-
-  AlbumImagesMap::const_iterator it = albums_images_.find(key);
-
-  if (it == albums_images_.end()) {
-    *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
-    return scoped_ptr<AlbumImages>();
-  }
-
-  *error = base::PLATFORM_FILE_OK;
-  return make_scoped_ptr(new AlbumImages(it->second));
-}
-
-void PicasaDataProvider::InvalidateData() {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-
-  // Set data state to stale and ignore responses from any in-flight processes.
-  // TODO(tommycli): Implement and call Cancel function for these
-  // UtilityProcessHostClients to actually kill the in-flight processes.
-  state_ = STALE_DATA_STATE;
-  album_table_reader_ = NULL;
-  albums_indexer_ = NULL;
-
-  DoRefreshIfNecessary();
-}
-
-void PicasaDataProvider::OnTempDirWatchStarted(
-    scoped_ptr<base::FilePathWatcher> temp_dir_watcher) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  temp_dir_watcher_.reset(temp_dir_watcher.release());
-}
-
-void PicasaDataProvider::OnTempDirChanged(const base::FilePath& temp_dir_path,
-                                          bool error) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  if (file_util::IsDirectoryEmpty(temp_dir_path))
-    InvalidateData();
-}
-
-void PicasaDataProvider::DoRefreshIfNecessary() {
-  DCHECK(state_ != INVALID_DATA_STATE);
-  DCHECK(state_ != ALBUMS_IMAGES_FRESH_STATE);
-  DCHECK(!(album_table_reader_ && albums_indexer_));
-
-  if (album_list_ready_callbacks_.empty() &&
-      albums_index_ready_callbacks_.empty()) {
-    return;
-  }
-
-  if (state_ == STALE_DATA_STATE) {
-    if (album_table_reader_)
-      return;
-    album_table_reader_ =
-        new SafePicasaAlbumTableReader(AlbumTableFiles(database_path_));
-    album_table_reader_->Start(
-        base::Bind(&PicasaDataProvider::OnAlbumTableReaderDone,
-                   weak_factory_.GetWeakPtr(),
-                   album_table_reader_));
-  } else {
-    DCHECK(state_ == LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE);
-    if (albums_indexer_)
-      return;
-    albums_indexer_ = new SafePicasaAlbumsIndexer(album_map_, folder_map_);
-    albums_indexer_->Start(base::Bind(&PicasaDataProvider::OnAlbumsIndexerDone,
-                                      weak_factory_.GetWeakPtr(),
-                                      albums_indexer_));
-  }
-}
-
-void PicasaDataProvider::OnAlbumTableReaderDone(
-    scoped_refptr<SafePicasaAlbumTableReader> reader,
-    bool parse_success,
-    const std::vector<AlbumInfo>& albums,
-    const std::vector<AlbumInfo>& folders) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  // If the reader has already been deemed stale, ignore the result.
-  if (reader != album_table_reader_)
-    return;
-  album_table_reader_ = NULL;
-
-  DCHECK(state_ == STALE_DATA_STATE);
-
-  if (!parse_success) {
-    // If we didn't get the list successfully, fail all those waiting for
-    // the albums indexer also.
-    state_ = INVALID_DATA_STATE;
-    RunAllCallbacks(&album_list_ready_callbacks_, false /* success */);
-    RunAllCallbacks(&albums_index_ready_callbacks_, false /* success */);
-    return;
-  }
-
-  album_map_.clear();
-  folder_map_.clear();
-  UniquifyNames(albums, &album_map_);
-  UniquifyNames(folders, &folder_map_);
-
-  state_ = LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE;
-  RunAllCallbacks(&album_list_ready_callbacks_, parse_success);
-
-  // Chain from this process onto refreshing the albums images if necessary.
-  DoRefreshIfNecessary();
-}
-
-void PicasaDataProvider::OnAlbumsIndexerDone(
-    scoped_refptr<SafePicasaAlbumsIndexer> indexer,
-    bool success,
-    const picasa::AlbumImagesMap& albums_images) {
-  DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
-  // If the indexer has already been deemed stale, ignore the result.
-  if (indexer != albums_indexer_)
-    return;
-  albums_indexer_ = NULL;
-
-  DCHECK(state_ == LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE);
-
-  if (success) {
-    state_ = ALBUMS_IMAGES_FRESH_STATE;
-
-    albums_images_ = albums_images;
-  }
-
-  RunAllCallbacks(&albums_index_ready_callbacks_, success);
-}
-
-// static
-std::string PicasaDataProvider::DateToPathString(const base::Time& time) {
-  base::Time::Exploded exploded_time;
-  time.LocalExplode(&exploded_time);
-
-  // TODO(tommycli): Investigate better localization and persisting which locale
-  // we use to generate these unique names.
-  return base::StringPrintf("%04d-%02d-%02d", exploded_time.year,
-                            exploded_time.month, exploded_time.day_of_month);
-}
-
-// static
-void PicasaDataProvider::UniquifyNames(const std::vector<AlbumInfo>& info_list,
-                                       AlbumMap* result_map) {
-  // TODO(tommycli): We should persist the uniquified names.
-  std::vector<std::string> desired_names;
-
-  std::map<std::string, int> total_counts;
-  std::map<std::string, int> current_counts;
-
-  for (std::vector<AlbumInfo>::const_iterator it = info_list.begin();
-       it != info_list.end(); ++it) {
-    std::string desired_name =
-        it->name + " " + DateToPathString(it->timestamp);
-    desired_names.push_back(desired_name);
-    ++total_counts[desired_name];
-  }
-
-  for (unsigned int i = 0; i < info_list.size(); i++) {
-    std::string name = desired_names[i];
-
-    if (total_counts[name] != 1) {
-      name = base::StringPrintf("%s (%d)", name.c_str(),
-                                ++current_counts[name]);
-    }
-
-    result_map->insert(std::pair<std::string, AlbumInfo>(name, info_list[i]));
-  }
-}
-
-}  // namespace picasa