[feature] WaveProgressBar

[xoesae]

Several large CLI libraries include an easy way to create progress bars, with this in mind I brought a new class to Wave, the WaveProgressBar.

To instantiate a new WaveProgressBar, we have a 3 params:

• max: the number max of progress, default is 100;
• step: amount that will advance with each step;
• char: the char will be rendered in progress bar;

The WaveProgressBar has 3 main methods:

• init: display the progress bar in the stdout;
• advance: increment the progress bar based on the step defined in the constructor;
• finish: set the progress to max and render the final progress;

Example of usage:

import { WaveCommand, WaveProgressBar } from "wave-shell";

function wait(ms: number) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

export default {
    description: 'Running a progress bar',
    async run() {
        let progressBar = new WaveProgressBar(100, 5, '#');

        progressBar.init();

        for (let i = 0; i < 10; i++) {
            progressBar.advance();
            await wait(100);
        }

        progressBar.finish();
    },
} as WaveCommand

I am available for any necessary changes 😃