forked from public/fvtt-cthulhu-eternal
29 lines
739 B
JavaScript
29 lines
739 B
JavaScript
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'use strict'
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var nextTick = require('./next-tick')
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exports.fromCallback = function (callback, symbol) {
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if (callback === undefined) {
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var promise = new Promise(function (resolve, reject) {
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callback = function (err, res) {
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if (err) reject(err)
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else resolve(res)
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}
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})
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callback[symbol !== undefined ? symbol : 'promise'] = promise
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} else if (typeof callback !== 'function') {
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throw new TypeError('Callback must be a function')
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}
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return callback
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}
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exports.fromPromise = function (promise, callback) {
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if (callback === undefined) return promise
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promise
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.then(function (res) { nextTick(() => callback(null, res)) })
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.catch(function (err) { nextTick(() => callback(err)) })
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}
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