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/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_SNAPSHOT_VERSION_H_
#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_SNAPSHOT_VERSION_H_
#include "Firestore/core/include/firebase/firestore/timestamp.h"
namespace firebase {
namespace firestore {
namespace model {
/**
* A version of a document in Firestore. This corresponds to the version
* timestamp, such as update_time or read_time.
*/
class SnapshotVersion {
public:
#if __OBJC__
SnapshotVersion() {
}
#endif // __OBJC__
explicit SnapshotVersion(const Timestamp& timestamp);
const Timestamp& timestamp() const {
return timestamp_;
}
/** Creates a new version that is smaller than all other versions. */
static const SnapshotVersion& None();
#if __OBJC__
size_t Hash() const {
return std::hash<Timestamp>{}(timestamp_);
}
#endif // __OBJC__
private:
Timestamp timestamp_;
};
/** Compares against another SnapshotVersion. */
inline bool operator<(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() < rhs.timestamp();
}
inline bool operator>(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() > rhs.timestamp();
}
inline bool operator>=(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() >= rhs.timestamp();
}
inline bool operator<=(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() <= rhs.timestamp();
}
inline bool operator!=(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() != rhs.timestamp();
}
inline bool operator==(const SnapshotVersion& lhs, const SnapshotVersion& rhs) {
return lhs.timestamp() == rhs.timestamp();
}
} // namespace model
} // namespace firestore
} // namespace firebase
#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_MODEL_SNAPSHOT_VERSION_H_
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