challenge-algorithms-v2.0-u.../node_modules/prompts/lib/util/wrap.js

28 lines
794 B
JavaScript

'use strict';
/**
* @param {string} msg The message to wrap
* @param {object} opts
* @param {number|string} [opts.margin] Left margin
* @param {number} opts.width Maximum characters per line including the margin
*/
module.exports = (msg, opts = {}) => {
const tab = Number.isSafeInteger(parseInt(opts.margin))
? new Array(parseInt(opts.margin)).fill(' ').join('')
: (opts.margin || '');
const width = opts.width;
return (msg || '').split(/\r?\n/g)
.map(line => line
.split(/\s+/g)
.reduce((arr, w) => {
if (w.length + tab.length >= width || arr[arr.length - 1].length + w.length + 1 < width)
arr[arr.length - 1] += ` ${w}`;
else arr.push(`${tab}${w}`);
return arr;
}, [ tab ])
.join('\n'))
.join('\n');
};