mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/weave/packetizer.h"
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#include <utility>
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#include "absl/status/status.h"
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#include "internal/platform/byte_array.h"
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#include "internal/platform/mutex_lock.h"
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#include "internal/weave/packet.h"
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namespace nearby {
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namespace weave {
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absl::Status Packetizer::AddPacket(Packet packet) {
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MutexLock lock(&mutex_);
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if (is_message_complete_) {
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return absl::InvalidArgumentError(
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"Call GetMessage() first to retrieve message before adding another "
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"packet.");
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}
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if (pending_payloads_.empty() && !packet.IsFirstPacket()) {
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return absl::InvalidArgumentError(
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"First packet added must be marked as the first packet.");
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}
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if (!pending_payloads_.empty() && packet.IsFirstPacket()) {
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return absl::InvalidArgumentError(
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"Packet marked as first packet cannot be added if there are existing "
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"packets.");
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}
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absl::StrAppend(&pending_payloads_, packet.GetPayload());
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if (packet.IsLastPacket()) {
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is_message_complete_ = true;
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}
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return absl::OkStatus();
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}
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absl::StatusOr<ByteArray> Packetizer::TakeMessage() {
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MutexLock lock(&mutex_);
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if (!is_message_complete_) {
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return absl::UnavailableError(
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"Full message is not available, no last packet added yet.");
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}
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ByteArray message = ByteArray(std::move(pending_payloads_));
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pending_payloads_.clear();
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is_message_complete_ = false;
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return message;
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}
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void Packetizer::Reset() {
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MutexLock lock(&mutex_);
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pending_payloads_.clear();
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is_message_complete_ = false;
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}
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} // namespace weave
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} // namespace nearby
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