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// 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.
#ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_PICASA_DATA_PROVIDER_H_
#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_PICASA_DATA_PROVIDER_H_
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/file_path_watcher.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "chrome/common/media_galleries/picasa_types.h"
namespace picasa {
class SafePicasaAlbumTableReader;
class SafePicasaAlbumsIndexer;
// Created and owned by ImportedMediaGalleryRegistryTaskRunnerValues
class PicasaDataProvider {
public:
typedef base::Callback<void(bool)> ReadyCallback;
enum DataType {
LIST_OF_ALBUMS_AND_FOLDERS_DATA,
ALBUMS_IMAGES_DATA
};
explicit PicasaDataProvider(const base::FilePath& database_path);
virtual ~PicasaDataProvider();
// Ask the data provider to refresh the data if necessary. |ready_callback|
// will be called when the data is up to date.
void RefreshData(DataType needed_data, const ReadyCallback& ready_callback);
// These methods return scoped_ptrs because we want to return a copy that
// will not change to the caller.
scoped_ptr<AlbumMap> GetAlbums();
scoped_ptr<AlbumMap> GetFolders();
// |error| must be non-NULL.
scoped_ptr<AlbumImages> FindAlbumImages(const std::string& key,
base::File::Error* error);
protected:
// Notifies data provider that any currently cached data is stale.
virtual void InvalidateData();
private:
enum State {
STALE_DATA_STATE,
INVALID_DATA_STATE,
LIST_OF_ALBUMS_AND_FOLDERS_FRESH_STATE,
ALBUMS_IMAGES_FRESH_STATE
};
friend class PicasaFileUtilTest;
friend class TestPicasaDataProvider;
// Called when the FilePathWatcher for Picasa's temp directory has started.
virtual void OnTempDirWatchStarted(
scoped_ptr<base::FilePathWatcher> temp_dir_watcher);
// Called when Picasa's temp directory has changed. Virtual for testing.
virtual void OnTempDirChanged(const base::FilePath& temp_dir_path,
bool error);
// Kicks off utility processes needed to fulfill any pending callbacks.
void DoRefreshIfNecessary();
void OnAlbumTableReaderDone(scoped_refptr<SafePicasaAlbumTableReader> reader,
bool parse_success,
const std::vector<AlbumInfo>& albums,
const std::vector<AlbumInfo>& folder);
void OnAlbumsIndexerDone(scoped_refptr<SafePicasaAlbumsIndexer> indexer,
bool success,
const picasa::AlbumImagesMap& albums_images);
static std::string DateToPathString(const base::Time& time);
static void UniquifyNames(const std::vector<AlbumInfo>& info_list,
AlbumMap* result_map);
AlbumMap album_map_;
AlbumMap folder_map_;
AlbumImagesMap albums_images_;
base::FilePath database_path_;
State state_;
// Callbacks that are waiting for their requested data to be ready.
std::vector<ReadyCallback> album_list_ready_callbacks_;
std::vector<ReadyCallback> albums_index_ready_callbacks_;
// Stores the "live" in-flight utility processes. Callbacks from other
// (older) utility processes are stale and ignored. Only one of these at a
// time should be non-NULL.
scoped_refptr<SafePicasaAlbumTableReader> album_table_reader_;
scoped_refptr<SafePicasaAlbumsIndexer> albums_indexer_;
// We watch the temp dir, as we can't detect database file modifications on
// Mac, but we are able to detect creation and deletion of temporary files.
scoped_ptr<base::FilePathWatcher> temp_dir_watcher_;
base::WeakPtrFactory<PicasaDataProvider> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(PicasaDataProvider);
};
} // namespace picasa
#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_PICASA_DATA_PROVIDER_H_
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