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2 years ago
'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');
};