index.js

// Library to send signal to Q keyboards
const q = require('daskeyboard-applet');
const moment = require('moment');

const logger = q.logger;

class Clock extends q.DesktopApp {
    constructor() {
        super();
        this.pollingInterval = 1000 * 60 * 10; // only poll rarely, as we will schedule to run right when time changes
        this.timeout = null;
        logger.info("Clock ready to go!");
    }

    async schedule() {
        let now = moment();
        let next = moment().add(1,'minute').set('seconds',0);
        let delay = next.diff(now, 'milliseconds');
        logger.debug('Wait for '+delay);
        this.setTimeout(this.poll,delay);
    }

    async run() {
        let time = moment();
        let formatted = time.format('h:mm a');
        logger.debug("Clock tick: "+formatted);
        this.schedule();
        return new q.Signal({
            points: this.generatePoints(time),
            name: 'Clock',
            message: 'The time is ' + formatted,
            isMuted: true,
        });
    }

    generatePoints(time) {
        let row1 = [];
        // populate am/pm indicator
        let half = time.format('a');
        row1.push(new q.Point(this.getColor('pm', half)));

        row1.push(new q.Point(this.config.backgroundColor)); // blank spot between esc and f1
        // populate hour indicators
        let hour = time.format('h');
        for (var i = 1; i < 13; i++) {
            if (i == 5) {
                row1.push(new q.Point(this.config.backgroundColor)); // blank spot between f4 and f5
            }
            row1.push(new q.Point(this.getColor(i, hour)));
        }

        let row2 = [new q.Point(this.config.backgroundColor)]; // blank spot for ~ before 1
        // populate minute indicators
        let minute = time.format('m').split('').map(Number);
        for (var i = 1; i < 11; i++) {
            row2.push(new q.Point(this.getColor(i % 10, minute)));
        }
        for (var i = 0; i < 3; i++) {
            row2.push(new q.Point(this.config.backgroundColor)); // blank keys at end of second row
        }

        return [row1, row2];
    }

    getColor(index, current) {
        if (index == current) {
            return this.config.primaryColor;
        } else if (current instanceof Array) {
            let isDouble = (current[0] == current[1] && current[0] == index);
            let isPrimary = (current[0] == index);
            let isSecondary = (current[1] == index);
            switch (true) {
                case isDouble: return this.config.doubleColor;
                case isPrimary: return this.config.primaryColor;
                case isSecondary: return this.config.secondaryColor;
            }
        }
        return this.config.backgroundColor;
    }

    setTimeout(method,delay) {
        if (this.timeout) {
            clearTimeout(this.timeout);
        }
        this.timeout = setTimeout(method.bind(this),delay);
    }
}

module.exports = {
    Clock: Clock
};
const clock = new Clock();