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27 lines
794 B
27 lines
794 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)) |
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? new Array(parseInt(opts.margin)).fill(' ').join('') |
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: (opts.margin || ''); |
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const width = opts.width; |
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return (msg || '').split(/\r?\n/g) |
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.map(line => line |
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.split(/\s+/g) |
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.reduce((arr, w) => { |
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if (w.length + tab.length >= width || arr[arr.length - 1].length + w.length + 1 < width) |
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arr[arr.length - 1] += ` ${w}`; |
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else arr.push(`${tab}${w}`); |
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return arr; |
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}, [ tab ]) |
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.join('\n')) |
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.join('\n'); |
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};
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