nodeify.js•1.65 kB
"use strict";
module.exports = function(Promise) {
var util = require("./util");
var async = Promise._async;
var tryCatch = util.tryCatch;
var errorObj = util.errorObj;
function spreadAdapter(val, nodeback) {
var promise = this;
if (!util.isArray(val)) return successAdapter.call(promise, val, nodeback);
var ret =
tryCatch(nodeback).apply(promise._boundValue(), [null].concat(val));
if (ret === errorObj) {
async.throwLater(ret.e);
}
}
function successAdapter(val, nodeback) {
var promise = this;
var receiver = promise._boundValue();
var ret = val === undefined
? tryCatch(nodeback).call(receiver, null)
: tryCatch(nodeback).call(receiver, null, val);
if (ret === errorObj) {
async.throwLater(ret.e);
}
}
function errorAdapter(reason, nodeback) {
var promise = this;
if (!reason) {
var newReason = new Error(reason + "");
newReason.cause = reason;
reason = newReason;
}
var ret = tryCatch(nodeback).call(promise._boundValue(), reason);
if (ret === errorObj) {
async.throwLater(ret.e);
}
}
Promise.prototype.asCallback = Promise.prototype.nodeify = function (nodeback,
options) {
if (typeof nodeback == "function") {
var adapter = successAdapter;
if (options !== undefined && Object(options).spread) {
adapter = spreadAdapter;
}
this._then(
adapter,
errorAdapter,
undefined,
this,
nodeback
);
}
return this;
};
};