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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_SAFE_PICASA_ALBUMS_INDEXER_H_
#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_PICASA_ALBUMS_INDEXER_H_
#include <queue>
#include <vector>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "chrome/common/media_galleries/picasa_types.h"
#include "content/public/browser/utility_process_host_client.h"
namespace base {
class FilePath;
}
namespace IPC {
class Message;
}
namespace picasa {
// SafePicasaAlbumsIndexer indexes the contents of Picasa Albums by parsing the
// INI files found in Folders. The SafePicasaAlbumsIndexer object is ref-counted
// and kept alive after Start() is called until the ParserCallback is called.
// The ParserCallback is guaranteed to be called eventually either when the
// utility process replies or when it dies.
class SafePicasaAlbumsIndexer : public content::UtilityProcessHostClient {
public:
typedef base::Callback<
void(bool parse_success, const picasa::AlbumImagesMap&)>
DoneCallback;
SafePicasaAlbumsIndexer(const AlbumMap& albums, const AlbumMap& folders);
void Start(const DoneCallback& callback);
private:
enum ParserState {
INITIAL_STATE,
STARTED_PARSING_STATE,
FINISHED_PARSING_STATE,
};
// Private because content::UtilityProcessHostClient is ref-counted.
~SafePicasaAlbumsIndexer() override;
// Processes a batch of folders. Reposts itself until done, then starts IPC.
void ProcessFoldersBatch();
// Launches the utility process. Must run on the IO thread.
void StartWorkOnIOThread();
// Notification from the utility process when it finshes indexing all the
// album contents. On error will return an empty map.
// Runs on the IO thread.
void OnIndexPicasaAlbumsContentsFinished(const AlbumImagesMap& albums_images);
// UtilityProcessHostClient implementation.
// Runs on the IO thread.
void OnProcessCrashed(int exit_code) override;
bool OnMessageReceived(const IPC::Message& message) override;
AlbumUIDSet album_uids_;
// List of folders that still need their INI files read.
std::queue<base::FilePath> folders_queue_;
std::vector<picasa::FolderINIContents> folders_inis_;
// Only accessed on the Media Task Runner.
DoneCallback callback_;
// Verifies the messages from the utility process came at the right time.
// Initialized on the Media Task Runner, but only accessed on the IO thread.
ParserState parser_state_;
DISALLOW_COPY_AND_ASSIGN(SafePicasaAlbumsIndexer);
};
} // namespace picasa
#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_PICASA_ALBUMS_INDEXER_H_
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