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- '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');
- };
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