forked from M3-Academy/challenge-algorithms-v2.0
28 lines
794 B
JavaScript
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');
|
|
};
|