wakitsu/bin/lib/cli/cli-spinner.js

Hobby project for managing anime watch list on Kitsu through CLI

import { stdout } from 'process';
const _dotFrames = ['⠋', '⠙', '⠚', '⠞', '⠖', '⠦', '⠴', '⠲', '⠳', '⠓'];
const _hideCursorChar = '\u001B[?25l';
const _showCursorChar = '\u001B[?25h';
export function createSpinner(text) {
    let interval;
    function start(fps) {
        if (!text.includes('@@')) {
            throw Error('missing "@@" placeholder');
        }
        let framePos = 0;
        writeSpinnerFrame(framePos++, text);
        interval = setInterval(() => {
            framePos = writeSpinnerFrame(framePos++, text);
        }, Math.ceil(1000 / fps));
    }
    return {
        start,
        stop: () => {
            clearInterval(interval);
            clearStdout();
            stdout.write(_showCursorChar);
        },
    };
}
function writeSpinnerFrame(framePos, msg) {
    if (framePos > 0)
        clearStdout();
    if (framePos == _dotFrames.length)
        framePos = 0;
    const str = msg.replaceAll('@@', _dotFrames[framePos]);
    stdout.write(`${str}${_hideCursorChar}\n`);
    return ++framePos;
}
function clearStdout() {
    stdout.moveCursor(0, -1);
    stdout.clearLine(0);
    stdout.cursorTo(0);
}
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