74 lines
2 KiB
JavaScript
74 lines
2 KiB
JavaScript
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var thenify = require('thenify')
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module.exports = thenifyAll
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thenifyAll.withCallback = withCallback
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thenifyAll.thenify = thenify
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/**
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* Promisifies all the selected functions in an object.
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*
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* @param {Object} source the source object for the async functions
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* @param {Object} [destination] the destination to set all the promisified methods
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* @param {Array} [methods] an array of method names of `source`
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* @return {Object}
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* @api public
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*/
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function thenifyAll(source, destination, methods) {
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return promisifyAll(source, destination, methods, thenify)
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}
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/**
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* Promisifies all the selected functions in an object and backward compatible with callback.
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*
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* @param {Object} source the source object for the async functions
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* @param {Object} [destination] the destination to set all the promisified methods
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* @param {Array} [methods] an array of method names of `source`
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* @return {Object}
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* @api public
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*/
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function withCallback(source, destination, methods) {
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return promisifyAll(source, destination, methods, thenify.withCallback)
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}
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function promisifyAll(source, destination, methods, promisify) {
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if (!destination) {
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destination = {};
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methods = Object.keys(source)
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}
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if (Array.isArray(destination)) {
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methods = destination
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destination = {}
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}
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if (!methods) {
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methods = Object.keys(source)
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}
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if (typeof source === 'function') destination = promisify(source)
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methods.forEach(function (name) {
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// promisify only if it's a function
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if (typeof source[name] === 'function') destination[name] = promisify(source[name])
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})
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// proxy the rest
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Object.keys(source).forEach(function (name) {
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if (deprecated(source, name)) return
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if (destination[name]) return
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destination[name] = source[name]
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})
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return destination
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}
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function deprecated(source, name) {
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var desc = Object.getOwnPropertyDescriptor(source, name)
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if (!desc || !desc.get) return false
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if (desc.get.name === 'deprecated') return true
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return false
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}
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