progress.js

export default class Progress {
    constructor(total, progressBarLength) {
        this.total = total;
        this.progressBarLength = progressBarLength;
        this.cdnLinks = { success: 0, fails: 0 };
        this.downloads = { success: 0, fails: 0 };
        this.printProgress(true);
    }

    cdnLinkSucceeded(didSucceed) {
        didSucceed ? this.cdnLinks.success++ : this.cdnLinks.fails++;
        this.printProgress();
    }

    downloadSucceeded(didSucceed) {
        didSucceed ? this.downloads.success++ : this.downloads.fails++;
        this.printProgress();
    }

    printProgress(firstRun) {
        if (!firstRun) process.stdout.moveCursor(0, -2);

        process.stdout.clearLine();
        process.stdout.cursorTo(0);

        this.printBar(
            "CDN-LINKS: ",
            this.cdnLinks.success,
            this.cdnLinks.fails
        );
        this.printBar(
            "DOWNLOADS: ",
            this.downloads.success,
            this.downloads.fails
        );
    }

    printBar(name, success, fails) {
        process.stdout.write(name);

        var progress = (success + fails) / this.total;

        var bar = Math.floor(this.progressBarLength * progress);
        process.stdout.write("[");
        process.stdout.write(
            "=".repeat(bar) + "-".repeat(this.progressBarLength - bar)
        );
        process.stdout.write("] ");

        //process.stdout.write((progress * 100).toFixed(2) + "% ")
        process.stdout.write("" + success + "/" + this.total);
        process.stdout.write("\tFailed: " + fails);
        process.stdout.write("\n");
    }
};