25 lines
706 B
JavaScript
25 lines
706 B
JavaScript
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'use strict'
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exports.fromCallback = function (fn) {
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return Object.defineProperty(function (...args) {
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if (typeof args[args.length - 1] === 'function') fn.apply(this, args)
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else {
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return new Promise((resolve, reject) => {
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args.push((err, res) => (err != null) ? reject(err) : resolve(res))
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fn.apply(this, args)
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})
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}
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}, 'name', { value: fn.name })
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}
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exports.fromPromise = function (fn) {
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return Object.defineProperty(function (...args) {
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const cb = args[args.length - 1]
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if (typeof cb !== 'function') return fn.apply(this, args)
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else {
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args.pop()
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fn.apply(this, args).then(r => cb(null, r), cb)
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}
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}, 'name', { value: fn.name })
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}
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