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// SPDX-License-Identifier: Apache-2.0
#include "hvac-led-helper.hpp"
#include <iostream>
#include <iomanip>
#include <sstream>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/ini_parser.hpp>
namespace property_tree = boost::property_tree;
#define RED "/sys/class/leds/blinkm-3-9-red/brightness"
#define GREEN "/sys/class/leds/blinkm-3-9-green/brightness"
#define BLUE "/sys/class/leds/blinkm-3-9-blue/brightness"
// RGB temperature mapping
static struct {
const int temperature;
const int rgb[3];
} degree_colours[] = {
{15, {0, 0, 229} },
{16, {22, 0, 204} },
{17, {34, 0, 189} },
{18, {46, 0, 175} },
{19, {58, 0, 186} },
{20, {70, 0, 146} },
{21, {82, 0, 131} },
{22, {104, 0, 116} },
{23, {116, 0, 102} },
{24, {128, 0, 87} },
{25, {140, 0, 73} },
{26, {152, 0, 58} },
{27, {164, 0, 43} },
{28, {176, 0, 29} },
{29, {188, 0, 14} },
{30, {201, 0, 5} }
};
HvacLedHelper::HvacLedHelper() :
m_temp_left(21),
m_temp_right(21),
m_config_valid(false),
m_verbose(0)
{
read_config();
}
void HvacLedHelper::read_config()
{
// Using a separate configuration file now, it may make sense
// to revisit this if a workable scheme to handle overriding
// values for the full demo setup can be come up with.
std::string config("/etc/xdg/AGL/agl-service-hvac-leds.conf");
char *home = getenv("XDG_CONFIG_HOME");
if (home) {
config = home;
config += "/AGL/agl-service-hvac.conf";
}
std::cout << "Using configuration " << config << std::endl;
property_tree::ptree pt;
try {
property_tree::ini_parser::read_ini(config, pt);
}
catch (std::exception &ex) {
// Continue with defaults if file missing/broken
std::cerr << "Could not read " << config << std::endl;
m_config_valid = true;
return;
}
const property_tree::ptree &settings =
pt.get_child("leds", property_tree::ptree());
m_led_path_red = settings.get("red", RED);
std::stringstream ss;
ss << m_led_path_red;
ss >> std::quoted(m_led_path_red);
if (m_led_path_red.empty()) {
std::cerr << "Invalid red LED path" << std::endl;
return;
}
// stat file here?
std::cout << "Using red LED path " << m_led_path_red << std::endl;
m_led_path_green = settings.get("green", GREEN);
std::stringstream().swap(ss);
ss << m_led_path_green;
ss >> std::quoted(m_led_path_green);
if (m_led_path_green.empty()) {
std::cerr << "Invalid green LED path" << std::endl;
return;
}
// stat file here?
std::cout << "Using green LED path " << m_led_path_red << std::endl;
m_led_path_blue = settings.get("blue", BLUE);
std::stringstream().swap(ss);
ss << m_led_path_blue;
ss >> std::quoted(m_led_path_blue);
if (m_led_path_blue.empty()) {
std::cerr << "Invalid blue LED path" << std::endl;
return;
}
// stat file here?
std::cout << "Using blue LED path " << m_led_path_red << std::endl;
m_verbose = 0;
std::string verbose = settings.get("verbose", "");
std::stringstream().swap(ss);
ss << verbose;
ss >> std::quoted(verbose);
if (!verbose.empty()) {
if (verbose == "true" || verbose == "1")
m_verbose = 1;
if (verbose == "2")
m_verbose = 2;
}
m_config_valid = true;
}
void HvacLedHelper::set_left_temperature(uint8_t temp)
{
m_temp_left = temp;
led_update();
}
void HvacLedHelper::set_right_temperature(uint8_t temp)
{
m_temp_right = temp;
led_update();
}
void HvacLedHelper::led_update()
{
if (!m_config_valid)
return;
// Calculates average colour value taken from the temperature toggles,
// limiting to our 15 degree range
int temp_left = m_temp_left - 15;
if (temp_left < 0)
temp_left = 0;
else if (temp_left > 15)
temp_left = 15;
int temp_right = m_temp_right - 15;
if (temp_right < 0)
temp_right = 0;
else if (temp_right > 15)
temp_right = 15;
int red_value = (degree_colours[temp_left].rgb[0] + degree_colours[temp_right].rgb[0]) / 2;
int green_value = (degree_colours[temp_left].rgb[1] + degree_colours[temp_right].rgb[1]) / 2;
int blue_value = (degree_colours[temp_left].rgb[2] + degree_colours[temp_right].rgb[2]) / 2;
//
// Push colour mapping out
//
std::ofstream led_red;
led_red.open(m_led_path_red);
if (led_red.is_open()) {
led_red << std::to_string(red_value);
led_red.close();
} else {
std::cerr << "Could not write red LED path " << m_led_path_red << std::endl;
m_config_valid = false;
return;
}
std::ofstream led_green;
led_green.open(m_led_path_green);
if (led_green.is_open()) {
led_green << std::to_string(green_value);
led_green.close();
} else {
std::cerr << "Could not write green LED path " << m_led_path_green << std::endl;
m_config_valid = false;
return;
}
std::ofstream led_blue;
led_blue.open(m_led_path_blue);
if (led_blue.is_open()) {
led_blue << std::to_string(blue_value);
led_blue.close();
} else {
std::cerr << "Could not write blue LED path " << m_led_path_blue << std::endl;
m_config_valid = false;
return;
}
}
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