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// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
//
// 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 INCLUDED_SRC_BUILDTOOL_COMMON_REMOTE_COMMON_HPP
#define INCLUDED_SRC_BUILDTOOL_COMMON_REMOTE_COMMON_HPP
#include <cstdint>
#include <exception>
#include <map>
#include <optional>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "fmt/core.h"
#include "nlohmann/json.hpp"
#include "src/buildtool/common/remote/port.hpp"
#include "src/utils/cpp/expected.hpp"
struct ServerAddress {
std::string host;
Port port;
[[nodiscard]] auto ToJson() const noexcept -> nlohmann::json {
return nlohmann::json(
fmt::format("{}:{}", host, static_cast<std::uint16_t>(port)));
}
};
// Useful additional types
using ExecutionProperties = std::map<std::string, std::string>;
using DispatchEndpoint = std::pair<ExecutionProperties, ServerAddress>;
[[nodiscard]] static inline auto ParseAddress(
std::string const& address) noexcept -> std::optional<ServerAddress> {
std::istringstream iss(address);
std::string host;
std::string port;
if (not std::getline(iss, host, ':') or not std::getline(iss, port, ':')) {
return std::nullopt;
}
auto port_num = ParsePort(port);
if (not host.empty() and port_num) {
return ServerAddress{std::move(host), *port_num};
}
return std::nullopt;
}
[[nodiscard]] static inline auto ParseProperty(
std::string const& property) noexcept
-> std::optional<std::pair<std::string, std::string>> {
std::istringstream pss(property);
std::string key;
std::string val;
if (not std::getline(pss, key, ':') or not std::getline(pss, val, ':')) {
return std::nullopt;
}
return std::make_pair(key, val);
}
[[nodiscard]] static inline auto ParseDispatch(
std::string const& dispatch_info) noexcept
-> expected<std::vector<DispatchEndpoint>, std::string> {
nlohmann::json dispatch;
try {
dispatch = nlohmann::json::parse(dispatch_info);
} catch (std::exception const& e) {
return unexpected{fmt::format(
"Failed to parse endpoint configuration: {}", e.what())};
}
std::vector<DispatchEndpoint> parsed{};
try {
if (not dispatch.is_array()) {
return unexpected{
fmt::format("Endpoint configuration has to be a "
"list of pairs, but found {}",
dispatch.dump())};
}
for (auto const& entry : dispatch) {
if (not entry.is_array() or entry.size() != 2) {
return unexpected{
fmt::format("Endpoint configuration has to be a list of "
"pairs, but found entry {}",
entry.dump())};
}
if (not entry[0].is_object()) {
return unexpected{
fmt::format("Property condition has to be "
"given as an object, but found {}",
entry[0].dump())};
}
ExecutionProperties props{};
for (auto const& [k, v] : entry[0].items()) {
if (not v.is_string()) {
return unexpected{
fmt::format("Property condition has to be given as an "
"object of strings but found {}",
entry[0].dump())};
}
props.emplace(k, v.template get<std::string>());
}
if (not entry[1].is_string()) {
return unexpected{
fmt::format("Endpoint has to be specified as string (in "
"the form host:port), but found {}",
entry[1].dump())};
}
auto endpoint = ParseAddress(entry[1].template get<std::string>());
if (not endpoint) {
return unexpected{fmt::format("Failed to parse {} as endpoint.",
entry[1].dump())};
}
parsed.emplace_back(props, *endpoint);
}
} catch (std::exception const& e) {
return unexpected{
fmt::format("Failure analysing endpoint configuration {}: {}",
dispatch.dump(),
e.what())};
}
// success!
return parsed;
}
#endif // INCLUDED_SRC_BUILDTOOL_COMMON_REMOTE_COMMON_HPP
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