Nativefier/src/helpers/dishonestProgress.js

import ProgressBar from 'progress';

class DishonestProgress {
    constructor(total) {
        this.tickParts = total * 10;

        this.bar = new ProgressBar('  :task [:bar] :percent', {
            complete: '=',
            incomplete: ' ',
            total: total * this.tickParts,
            width: 50,
            clear: true
        });

        this.tickingPrevious = {
            message: '',
            remainder: 0,
            interval: null
        };
    }

    tick(message) {

        const {remainder: prevRemainder, message: prevMessage, interval: prevInterval} = this.tickingPrevious;

        if (prevRemainder) {
            this.bar.tick(prevRemainder, {
                task: prevMessage
            });
            clearInterval(prevInterval);
        }

        const realRemainder = this.bar.total - this.bar.curr;
        if (realRemainder === this.tickParts) {
            this.bar.tick(this.tickParts, {
                task: message
            });
            return;
        }

        this.bar.tick({
            task: message
        });

        this.tickingPrevious = {
            message: message,
            remainder: this.tickParts,
            interval: null
        };

        this.tickingPrevious.remainder -= 1;

        this.tickingPrevious.interval = setInterval(() => {
            if (this.tickingPrevious.remainder === 1) {
                clearInterval(this.tickingPrevious.interval);
                return;
            }

            this.bar.tick({
                task: message
            });
            this.tickingPrevious.remainder -= 1;
        }, 200);

    }
}

export default DishonestProgress;