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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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
#include <string>
#include <utility>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/sync_file_system/drive_backend/sync_task.h"
#include "chrome/browser/sync_file_system/sync_callbacks.h"
#include "google_apis/drive/drive_api_error_codes.h"
namespace drive {
class DriveServiceInterface;
}
namespace google_apis {
class FileResource;
}
namespace sync_file_system {
namespace drive_backend {
class MetadataDatabase;
class SyncEngineContext;
class TrackerIDSet;
// Resolves server side file confliction.
// If a remote file has an active tracker and multiple managed parents,
// ConflictResolver detaches the file from all parents other than the parent
// of the active tracker.
// If multiple trackers have the same local path or the same remote file,
// ConflictResolver picks up one of them and delete others.
class ConflictResolver : public SyncTask {
public:
typedef std::vector<std::string> FileIDList;
explicit ConflictResolver(SyncEngineContext* sync_context);
~ConflictResolver() override;
void RunPreflight(scoped_ptr<SyncTaskToken> token) override;
void RunExclusive(scoped_ptr<SyncTaskToken> token);
private:
typedef std::pair<std::string, std::string> FileIDAndETag;
void DetachFromNonPrimaryParents(scoped_ptr<SyncTaskToken> token);
void DidDetachFromParent(scoped_ptr<SyncTaskToken> token,
google_apis::DriveApiErrorCode error);
std::string PickPrimaryFile(const TrackerIDSet& trackers);
void RemoveNonPrimaryFiles(scoped_ptr<SyncTaskToken> token);
void DidRemoveFile(scoped_ptr<SyncTaskToken> token,
const std::string& file_id,
google_apis::DriveApiErrorCode error);
void UpdateFileMetadata(const std::string& file_id,
scoped_ptr<SyncTaskToken> token);
void DidGetRemoteMetadata(const std::string& file_id,
scoped_ptr<SyncTaskToken> token,
google_apis::DriveApiErrorCode error,
scoped_ptr<google_apis::FileResource> entry);
std::string target_file_id_;
std::vector<std::string> parents_to_remove_;
std::vector<FileIDAndETag> non_primary_file_ids_;
FileIDList deleted_file_ids_;
bool IsContextReady();
drive::DriveServiceInterface* drive_service();
MetadataDatabase* metadata_database();
SyncEngineContext* sync_context_; // Not owned.
base::WeakPtrFactory<ConflictResolver> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ConflictResolver);
};
} // namespace drive_backend
} // namespace sync_file_system
#endif // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
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