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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_IAPPS_LIBRARY_PARSER_H_
#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_IAPPS_LIBRARY_PARSER_H_
#include <string>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/memory/weak_ptr.h"
#include "chrome/common/media_galleries/iphoto_library.h"
#include "chrome/common/media_galleries/itunes_library.h"
#include "content/public/browser/utility_process_host.h"
#include "content/public/browser/utility_process_host_client.h"
namespace IPC {
class Message;
}
namespace iapps {
// SafeIAppsLibraryParser parses the given iTunes library XML file safely via
// a utility process. The SafeIAppsLibraryParser 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.
// Since iApps library XML files can be big, SafeIAppsLibraryParser passes
// the file handle to the utility process.
// SafeIAppsLibraryParser lives on the Media Task Runner unless otherwise
// noted.
class SafeIAppsLibraryParser : public content::UtilityProcessHostClient {
public:
typedef base::Callback<void(bool, const iphoto::parser::Library&)>
IPhotoParserCallback;
typedef base::Callback<void(bool, const itunes::parser::Library&)>
ITunesParserCallback;
SafeIAppsLibraryParser();
// Start the parse of the iPhoto library file.
void ParseIPhotoLibrary(const base::FilePath& library_file,
const IPhotoParserCallback& callback);
// Start the parse of the iTunes library file.
void ParseITunesLibrary(const base::FilePath& library_file,
const ITunesParserCallback& callback);
private:
enum ParserState {
INITIAL_STATE,
PINGED_UTILITY_PROCESS_STATE,
STARTED_PARSING_STATE,
FINISHED_PARSING_STATE,
};
// content::UtilityProcessHostClient is ref-counted.
~SafeIAppsLibraryParser() override;
// Posts a task to start the XML parsing in the utility process.
void Start();
// Launches the utility process. Must run on the IO thread.
void StartProcessOnIOThread();
// Notification that the utility process is running, and we can now get its
// process handle.
// Runs on the IO thread.
void OnUtilityProcessStarted();
// Notification from the utility process when it finishes parsing the
// iPhoto XML. Runs on the IO thread.
#if defined(OS_MACOSX)
void OnGotIPhotoLibrary(bool result, const iphoto::parser::Library& library);
#endif
// Notification from the utility process when it finishes parsing the
// iTunes XML. Runs on the IO thread.
void OnGotITunesLibrary(bool result, const itunes::parser::Library& library);
// Sets |parser_state_| in case the library XML file cannot be opened.
// Runs on the IO thread.
void OnOpenLibraryFileFailed();
// Communicates an error to the callback given to the constructor.
void OnError();
// UtilityProcessHostClient implementation.
// Runs on the IO thread.
void OnProcessCrashed(int exit_code) override;
bool OnMessageReceived(const IPC::Message& message) override;
base::FilePath library_file_path_;
// Once we have opened the file, we store the handle so that we can use it
// once the utility process has launched.
base::File library_file_;
// Only accessed on the IO thread.
base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
// Only accessed on the Media Task Runner.
ITunesParserCallback itunes_callback_;
// Only accessed on the Media Task Runner.
IPhotoParserCallback iphoto_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(SafeIAppsLibraryParser);
};
} // namespace iapps
#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_IAPPS_LIBRARY_PARSER_H_
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