sndlock/kirdy.cpp

#include <iostream>

#include <asio.hpp>
#include <json/json.h>

#include "kirdy.hpp"

Kirdy::Kirdy(asio::string_view host, asio::string_view service)
{
    socket.connect(host, service);
    if(!socket)
        std::cerr << "failed to connect to Kirdy at " << host << ": " << socket.error().message() << "\n";
}

Json::Value Kirdy::command(Json::Value &request)
{
    Json::StreamWriterBuilder builder_w;
    std::string request_str = Json::writeString(builder_w, request);
    socket << request_str;

    std::string reply_str;
    std::getline(socket, reply_str);
    Json::CharReaderBuilder builder_r;
    const std::unique_ptr<Json::CharReader> reader(builder_r.newCharReader());
    Json::Value reply;
    JSONCPP_STRING err;
    if(!reader->parse(reply_str.data(), reply_str.data() + reply_str.size(), &reply, &err))
        std::cerr << "JSON parse error: " << err << "\n";
    return reply;
}

float Kirdy::get_laser_temp()
{
    Json::Value request;
    request["device_cmd"] = "GetStatusReport";
    Json::Value reply = command(request);
    return reply["thermostat"]["temperature"].asFloat();
}

void Kirdy::set_tec_current(float milliamps)
{
    Json::Value request;
    request["tec_set_i"] = milliamps*0.001f;
    Json::Value reply = command(request);
    if(reply["msg_type"].asString() != "Acknowledge")
        std::cerr << "TEC set current failed\n";
}