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// Copyright 2021 Google LLC
//
// 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
//
// https://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.
#include "internal/proto_time_encoding.h"
#include <string>
#include "google/protobuf/duration.pb.h"
#include "google/protobuf/timestamp.pb.h"
#include "google/protobuf/util/time_util.h"
#include "absl/status/status.h"
#include "absl/strings/str_cat.h"
#include "absl/time/time.h"
#include "internal/status_macros.h"
#include "internal/time.h"
namespace cel::internal {
namespace {
absl::Status Validate(absl::Time time) {
if (time < cel::internal::MinTimestamp()) {
return absl::InvalidArgumentError("time below min");
}
if (time > cel::internal::MaxTimestamp()) {
return absl::InvalidArgumentError("time above max");
}
return absl::OkStatus();
}
absl::Status CelValidateDuration(absl::Duration duration) {
if (duration < cel::internal::MinDuration()) {
return absl::InvalidArgumentError("duration below min");
}
if (duration > cel::internal::MaxDuration()) {
return absl::InvalidArgumentError("duration above max");
}
return absl::OkStatus();
}
} // namespace
absl::Duration DecodeDuration(const google::protobuf::Duration& proto) {
return absl::Seconds(proto.seconds()) + absl::Nanoseconds(proto.nanos());
}
absl::Time DecodeTime(const google::protobuf::Timestamp& proto) {
return absl::FromUnixSeconds(proto.seconds()) +
absl::Nanoseconds(proto.nanos());
}
absl::Status EncodeDuration(absl::Duration duration,
google::protobuf::Duration* proto) {
CEL_RETURN_IF_ERROR(CelValidateDuration(duration));
// s and n may both be negative, per the Duration proto spec.
const int64_t s = absl::IDivDuration(duration, absl::Seconds(1), &duration);
const int64_t n =
absl::IDivDuration(duration, absl::Nanoseconds(1), &duration);
proto->set_seconds(s);
proto->set_nanos(n);
return absl::OkStatus();
}
absl::StatusOr<std::string> EncodeDurationToString(absl::Duration duration) {
google::protobuf::Duration d;
auto status = EncodeDuration(duration, &d);
if (!status.ok()) {
return status;
}
return google::protobuf::util::TimeUtil::ToString(d);
}
absl::Status EncodeTime(absl::Time time, google::protobuf::Timestamp* proto) {
CEL_RETURN_IF_ERROR(Validate(time));
const int64_t s = absl::ToUnixSeconds(time);
proto->set_seconds(s);
proto->set_nanos((time - absl::FromUnixSeconds(s)) / absl::Nanoseconds(1));
return absl::OkStatus();
}
absl::StatusOr<std::string> EncodeTimeToString(absl::Time time) {
google::protobuf::Timestamp t;
auto status = EncodeTime(time, &t);
if (!status.ok()) {
return status;
}
return google::protobuf::util::TimeUtil::ToString(t);
}
} // namespace cel::internal