Temperature conversion for twitch chat

twitch-temperature.js

const config = {
    settings: {
        TWITCH: {
            USERNAME: '',
            OAUTH_TOKEN: '',
            CHANNEL_NAME: ''
        },
    },
}

var client;

function sendMessage(message) {
    console.warn(message);
    client.say(config.settings.TWITCH.CHANNEL_NAME, message).catch(console.error);
}

function appendScriptFilesToDocument(filePaths) {
    return new Promise((resolve, reject) => {
        let count = 0;
        const total = filePaths.length;

        if (total === 0) {
            resolve();
        }

        function appendFile(filePath) {
            let file;

            if (filePath.endsWith('.js')) {
                file = document.createElement('script');
                file.src = filePath;
            } else if (filePath.endsWith('.css')) {
                file = document.createElement('link');
                file.rel = 'stylesheet';
                file.href = filePath;
            } else {
                reject(new Error('Unsupported file type'));
            }

            if (!file) return reject(new Error('File could not be loaded'));

            file.addEventListener('load', () => {
                count++;
                if (count === total) {
                    resolve();
                } else {
                    appendFile(filePaths[count]);
                }
            });

            file.addEventListener('error', (err) => {
                reject(err);
            });

            document.head.appendChild(file);
        }

        appendFile(filePaths[0]);
    });
}

function truncateDecimals(number, digits) {
    return number.toFixed(digits);
}

function convertCelciusToFahrenheit(celcius) {
    return truncateDecimals(celcius * 9 / 5 + 32, 0);
}

function convertFahrenheitToCelcius(fahrenheit) {
    return truncateDecimals((fahrenheit - 32) * 5 / 9, 0);
}

function messageHandleTempertature(message) {
    const match = message.match(/(\s|^)\d{1,}[CF](\s|$)/i);

    if (!match) {
        return;
    }

    const value = parseInt(match[0]);
    const unit = match[0].replace(value, "");

    if (unit === 'C' || unit === 'c') {
        sendMessage(`${value}°C is ${convertCelciusToFahrenheit(value)}°F`);
    } else {
        sendMessage(`${value}°F is ${convertFahrenheitToCelcius(value)}°C`);
    }
}

appendScriptFilesToDocument([
    'https://nomercy.tv/js/tmi.js',
]).then(() => {

    client = new tmi.Client({
        options: {
            skipUpdatingEmotesets: true,
        },
        identity: {
            username: config.settings.TWITCH.USERNAME,
            password: `oauth:${config.settings.TWITCH.OAUTH_TOKEN}`,
        },
        channels: [config.settings.TWITCH.CHANNEL_NAME],
    });

    client.connect().then(() => {
        console.log('Connected');
    });

    client.on('message', (channel, tags, message, self) => {
        console.log(`${tags['display-name']}: ${message}`);
        if (self) return;

        messageHandleTempertature(message);
    });

}).catch((err) => {
    console.error(err);
});