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// Copyright (c) 2012 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 SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_H_
#define SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_H_
#include <string>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
namespace base {
class DictionaryValue;
} // namespace
namespace syncer {
// Opaque class that represents a local ack handle. We don't reuse the
// invalidation ack handles to avoid unnecessary dependencies.
class AckHandle {
public:
static AckHandle CreateUnique();
static AckHandle InvalidAckHandle();
bool Equals(const AckHandle& other) const;
scoped_ptr<base::DictionaryValue> ToValue() const;
bool ResetFromValue(const base::DictionaryValue& value);
bool IsValid() const;
private:
// Explicitly copyable and assignable for STL containers.
AckHandle(const std::string& state, base::Time timestamp);
std::string state_;
base::Time timestamp_;
};
// Represents a local invalidation, and is roughly analogous to
// invalidation::Invalidation. It contains a payload (which may be empty) and an
// associated ack handle that an InvalidationHandler implementation can use to
// acknowledge receipt of the invalidation. It does not embed the object ID,
// since it is typically associated with it through ObjectIdInvalidationMap.
struct Invalidation {
Invalidation();
bool Equals(const Invalidation& other) const;
scoped_ptr<base::DictionaryValue> ToValue() const;
bool ResetFromValue(const base::DictionaryValue& value);
std::string payload;
AckHandle ack_handle;
};
} // namespace syncer
#endif // SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_H_
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