Ton

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/*
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    This file is part of TON Blockchain Library.
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    TON Blockchain Library is free software: you can redistribute it and/or modify
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    it under the terms of the GNU Lesser General Public License as published by
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    the Free Software Foundation, either version 2 of the License, or
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    (at your option) any later version.
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    TON Blockchain Library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public License
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    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
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    Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "InboundTransfer.h"
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#include "common/errorcode.h"
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namespace ton {
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namespace rldp2 {
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size_t InboundTransfer::total_size() const {
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  return data_.size();
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}
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std::map<td::uint32, InboundTransfer::Part> &InboundTransfer::parts() {
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  return parts_;
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}
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bool InboundTransfer::is_part_completed(td::uint32 part_i) {
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  return parts_.count(part_i) == 0 && part_i < next_part_;
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}
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td::Result<InboundTransfer::Part *> InboundTransfer::get_part(td::uint32 part_i, const ton::fec::FecType &fec_type) {
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  auto it = parts_.find(part_i);
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  if (it != parts_.end()) {
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    return &it->second;
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  }
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  //TODO: pass offset off and process even newer parts.
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  //LOG_CHECK(next_part_ >= part_i) << next_part_ << " >= " << part_i;
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  if (next_part_ == part_i && parts_.size() < 20) {
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    auto offset = offset_;
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    offset_ += fec_type.size();
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    if (offset_ > total_size()) {
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      return td::Status::Error(ErrorCode::protoviolation,
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                               PSTRING() << "too big part: offset=" << offset_ << " total_size=" << total_size()
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                                         << " total_size=" << fec_type.size() << " part=" << part_i);
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    }
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    auto decoder = fec_type.create_decoder().move_as_ok();
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    auto it = parts_.emplace(part_i, Part{std::move(decoder), RldpReceiver(RldpSender::Config()), offset});
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    next_part_++;
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    return &it.first->second;
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  }
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  return nullptr;
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}
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void InboundTransfer::finish_part(td::uint32 part_i, td::Slice data) {
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  auto it = parts_.find(part_i);
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  CHECK(it != parts_.end());
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  data_.as_slice().substr(it->second.offset).copy_from(data);
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  parts_.erase(it);
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}
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td::optional<td::Result<td::BufferSlice>> InboundTransfer::try_finish() {
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  if (parts_.empty() && offset_ == data_.size()) {
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    return std::move(data_);
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  }
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  return {};
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}
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}  // namespace rldp2
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}  // namespace ton
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