diff options
author | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
---|---|---|
committer | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
commit | abd94a7f5a50f43c797a11b53549ae48fff667c3 (patch) | |
tree | ab8ed457f65cdd72e13e0571d2975729428f1551 /node_modules/promise/lib/node-extensions.js | |
parent | a0247c6a3fd6a09a41a7e35a3441324c4dcb58be (diff) | |
download | wallet-core-abd94a7f5a50f43c797a11b53549ae48fff667c3.tar.xz |
add node_modules to address #4364
Diffstat (limited to 'node_modules/promise/lib/node-extensions.js')
-rw-r--r-- | node_modules/promise/lib/node-extensions.js | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/node_modules/promise/lib/node-extensions.js b/node_modules/promise/lib/node-extensions.js new file mode 100644 index 000000000..890ae45dc --- /dev/null +++ b/node_modules/promise/lib/node-extensions.js @@ -0,0 +1,130 @@ +'use strict'; + +// This file contains then/promise specific extensions that are only useful +// for node.js interop + +var Promise = require('./core.js'); +var asap = require('asap'); + +module.exports = Promise; + +/* Static Functions */ + +Promise.denodeify = function (fn, argumentCount) { + if ( + typeof argumentCount === 'number' && argumentCount !== Infinity + ) { + return denodeifyWithCount(fn, argumentCount); + } else { + return denodeifyWithoutCount(fn); + } +} + +var callbackFn = ( + 'function (err, res) {' + + 'if (err) { rj(err); } else { rs(res); }' + + '}' +); +function denodeifyWithCount(fn, argumentCount) { + var args = []; + for (var i = 0; i < argumentCount; i++) { + args.push('a' + i); + } + var body = [ + 'return function (' + args.join(',') + ') {', + 'var self = this;', + 'return new Promise(function (rs, rj) {', + 'var res = fn.call(', + ['self'].concat(args).concat([callbackFn]).join(','), + ');', + 'if (res &&', + '(typeof res === "object" || typeof res === "function") &&', + 'typeof res.then === "function"', + ') {rs(res);}', + '});', + '};' + ].join(''); + return Function(['Promise', 'fn'], body)(Promise, fn); +} +function denodeifyWithoutCount(fn) { + var fnLength = Math.max(fn.length - 1, 3); + var args = []; + for (var i = 0; i < fnLength; i++) { + args.push('a' + i); + } + var body = [ + 'return function (' + args.join(',') + ') {', + 'var self = this;', + 'var args;', + 'var argLength = arguments.length;', + 'if (arguments.length > ' + fnLength + ') {', + 'args = new Array(arguments.length + 1);', + 'for (var i = 0; i < arguments.length; i++) {', + 'args[i] = arguments[i];', + '}', + '}', + 'return new Promise(function (rs, rj) {', + 'var cb = ' + callbackFn + ';', + 'var res;', + 'switch (argLength) {', + args.concat(['extra']).map(function (_, index) { + return ( + 'case ' + (index) + ':' + + 'res = fn.call(' + ['self'].concat(args.slice(0, index)).concat('cb').join(',') + ');' + + 'break;' + ); + }).join(''), + 'default:', + 'args[argLength] = cb;', + 'res = fn.apply(self, args);', + '}', + + 'if (res &&', + '(typeof res === "object" || typeof res === "function") &&', + 'typeof res.then === "function"', + ') {rs(res);}', + '});', + '};' + ].join(''); + + return Function( + ['Promise', 'fn'], + body + )(Promise, fn); +} + +Promise.nodeify = function (fn) { + return function () { + var args = Array.prototype.slice.call(arguments); + var callback = + typeof args[args.length - 1] === 'function' ? args.pop() : null; + var ctx = this; + try { + return fn.apply(this, arguments).nodeify(callback, ctx); + } catch (ex) { + if (callback === null || typeof callback == 'undefined') { + return new Promise(function (resolve, reject) { + reject(ex); + }); + } else { + asap(function () { + callback.call(ctx, ex); + }) + } + } + } +} + +Promise.prototype.nodeify = function (callback, ctx) { + if (typeof callback != 'function') return this; + + this.then(function (value) { + asap(function () { + callback.call(ctx, null, value); + }); + }, function (err) { + asap(function () { + callback.call(ctx, err); + }); + }); +} |