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65 lines
1.6 KiB
JavaScript

var readline = require('readline')
var Promise = require('any-promise')
var objectAssign = require('object-assign')
var Interface = readline.Interface
function wrapCompleter (completer) {
if (completer.length === 2) return completer
return function (line, cb) {
var result = completer(line)
if (typeof result.then !== 'function') {
return cb(null, result)
}
result.catch(cb).then(function (result) {
process.nextTick(function () { cb(null, result) })
})
}
}
function InterfaceAsPromised (input, output, completer, terminal) {
if (arguments.length === 1) {
var options = input
if (typeof options.completer === 'function') {
options = objectAssign({}, options, {
completer: wrapCompleter(options.completer)
})
}
Interface.call(this, options)
} else {
if (typeof completer === 'function') {
completer = wrapCompleter(completer)
}
Interface.call(this, input, output, completer, terminal)
}
}
InterfaceAsPromised.prototype = Object.create(Interface.prototype)
InterfaceAsPromised.prototype.question = function (question, callback) {
if (typeof callback === 'function') {
return Interface.prototype.question.call(this, question, callback)
}
var self = this
return new Promise(function (resolve) {
Interface.prototype.question.call(self, question, resolve)
})
}
objectAssign(exports, readline, {
Interface: InterfaceAsPromised,
createInterface: function (input, output, completer, terminal) {
if (arguments.length === 1) {
return new InterfaceAsPromised(input)
}
return new InterfaceAsPromised(input, output, completer, terminal)
}
})