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