lay/toREST/include/torrents.hpp

#ifndef _TR_TORRENTS_HPP_
#define _TR_TORRENTS_HPP_
#include <boost/filesystem.hpp>
#include <http.hpp>
#include <libtorrent/magnet_uri.hpp>
#include <util.hpp>

namespace tr {
namespace session {
namespace torrents {
template <class torrent_session, class request, class response>
void get(torrent_session &session, response resp, request req) {
  auto http_response = http::response();
  if (session.is_valid()) {
    auto torrents = session.get_torrents();
    auto response_object = nlohmann::json::object();
    auto torrents_json = nlohmann::json::array();
    for (auto &torrent : torrents) {
      if (torrent.is_valid()) {
        const auto hash = torrent.info_hash().to_string();
        const auto status = torrent.status(
            torrent.query_name |
            torrent.query_save_path);
        torrents_json.push_back({{"hash", hash},
                                 {"paused", status.paused},
                                 {"seeding", status.is_seeding},
                                 {"state", status.state},
                                 {"priority", status.priority},
                                 {"name", status.name}});
      }
    }
    response_object["torrents"] = torrents_json;
    http_response.set_status(http::ok);
    http_response.set_body(response_object);
  } else {
    auto response_code = http::code(http::service_unavailable);
    http_response.set_body({{"code", response_code.first}, {"status", response_code.second}});
    http_response.set_status(response_code.first);
  }
  *resp << http_response;
}

template <class torrent_session, class request, class response>
void del(torrent_session &session, response resp, request req) {
  auto http_response = http::response();
  const auto respond = [&](http::status status) {
    const auto response_code = http::code(status);
    http_response.set_body({{"code", response_code.first}, {"status", response_code.second}});
    http_response.set_status(response_code.first);
    *resp << http_response;
  };

  if (!session.is_valid()) {
    return respond(http::service_unavailable);
  }

  auto request_object = util::json::parse(req->content);

  if (request_object.is_null()) {
    return respond(http::bad_request);
  }

  if (!request_object.is_object()) {
    return respond(http::bad_request);
  }

  if (request_object.find("info_hash") == request_object.end()) {
    return respond(http::bad_request);
  }

  auto obj = request_object.at("info_hash");

  if (!obj.is_string()) {
    return respond(http::bad_request);
  }

  std::string sha1_hash_in = obj;
  libtorrent::sha1_hash sha1_hash;
  std::stringstream ss;
  ss << sha1_hash_in;
  ss >> sha1_hash;
  auto handle = session.find_torrent(sha1_hash);

  if (handle.is_valid()) {
    session.remove_torrent(handle);
  } else {
    return respond(http::bad_request);
  }

  respond(http::no_content);
}

template <class settings, class torrent_session, class request, class response>
void post(settings opts, torrent_session &session, response resp, request req) {
  auto http_response = http::response();
  const auto respond = [&](http::status status) {
    const auto response_code = http::code(status);
    http_response.set_body({{"code", response_code.first}, {"status", response_code.second}});
    http_response.set_status(response_code.first);
    *resp << http_response;
  };

  if (!session.is_valid()) {
    return respond(http::service_unavailable);
  }

  auto request_object = util::json::parse(req->content);

  if (request_object.is_null()) {
    return respond(http::bad_request);
  }

  if (!request_object.is_object()) {
    return respond(http::bad_request);
  }

  if (request_object.find("magnet_uri") == request_object.end()) {
    return respond(http::bad_request);
  }

  std::string uri = request_object.at("magnet_uri");
  boost::system::error_code ec;
  libtorrent::add_torrent_params params;
  libtorrent::parse_magnet_uri(uri, params, ec);
  if (ec) {
    return respond(http::bad_request);
  }

  if (request_object.find("save_path") != request_object.end()) {
    boost::filesystem::path save_path = request_object.at("save_path");
    if (save_path.is_relative())
      params.save_path = (opts.root_dir / save_path).string();
    else
      return respond(http::bad_request);
  } else
    params.save_path = boost::filesystem::path(opts.root_dir / opts.default_download_dir).string();

  params.flags &= ~libtorrent::add_torrent_params::flag_paused;

  if (request_object.find("paused") != request_object.end()) {
    bool paused = false;
    auto obj = request_object.at("paused");
    if (obj.is_boolean())
      paused = request_object.at("paused");
    else if (obj.is_string()) {
      std::string p = obj;
      paused = p == "true";
    }
    if (paused)
      params.flags |= libtorrent::add_torrent_params::flag_paused;
  }

  if (request_object.find("up_speed") != request_object.end()) {
    int up_limit = 0;
    auto obj = request_object.at("up_speed");
    if (obj.is_string()) {
      std::string i = obj;
      up_limit = std::stoi(i);
    } else if (obj.is_number()) {
      up_limit = obj;
    }
    params.upload_limit = up_limit;
  }

  if (request_object.find("down_speed") != request_object.end()) {
    int down_limit = 0;
    auto obj = request_object.at("down_speed");
    if (obj.is_string()) {
      std::string i = obj;
      down_limit = std::stoi(i);
    } else if (obj.is_number()) {
      down_limit = obj;
    }
    params.download_limit = down_limit;
  }

  if (request_object.find("name") != request_object.end()) {
    auto obj = request_object.at("name");
    if (obj.is_string())
      params.name = obj;
  }

  std::stringstream ss;
  ss << params.info_hash;

  session.async_add_torrent(params);

  http_response.add_header({"Location", "/session/torrents/" + ss.str()});
  return respond(http::created);
}
}
}
}
#endif