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1 files changed, 80 insertions, 0 deletions

diff --git a/node_modules/thenify/index.js b/node_modules/thenify/index.js
new file mode 100644
index 00000000..161d32e6
--- /dev/null
+++ b/node_modules/thenify/index.js
@@ -0,0 +1,80 @@
+
+var Promise = require('any-promise')
+var assert = require('assert')
+
+module.exports = thenify
+
+/**
+ * Turn async functions into promises
+ *
+ * @param {Function} $$__fn__$$
+ * @return {Function}
+ * @api public
+ */
+
+function thenify($$__fn__$$, options) {
+  assert(typeof $$__fn__$$ === 'function')
+  return eval(createWrapper($$__fn__$$.name, options))
+}
+
+/**
+ * Turn async functions into promises and backward compatible with callback
+ *
+ * @param {Function} $$__fn__$$
+ * @return {Function}
+ * @api public
+ */
+
+thenify.withCallback = function ($$__fn__$$, options) {
+  assert(typeof $$__fn__$$ === 'function')
+  options = options || {}
+  options.withCallback = true
+  if (options.multiArgs === undefined) options.multiArgs = true
+  return eval(createWrapper($$__fn__$$.name, options))
+}
+
+function createCallback(resolve, reject, multiArgs) {
+  return function(err, value) {
+    if (err) return reject(err)
+    var length = arguments.length
+
+    if (length <= 2 || !multiArgs) return resolve(value)
+
+    if (Array.isArray(multiArgs)) {
+      var values = {}
+      for (var i = 1; i < length; i++) values[multiArgs[i - 1]] = arguments[i]
+      return resolve(values)
+    }
+
+    var values = new Array(length - 1)
+    for (var i = 1; i < length; ++i) values[i - 1] = arguments[i]
+    resolve(values)
+  }
+}
+
+function createWrapper(name, options) {
+  name = (name || '').replace(/\s|bound(?!$)/g, '')
+  options = options || {}
+  // default to true
+  var multiArgs = options.multiArgs !== undefined ? options.multiArgs : true
+  multiArgs = 'var multiArgs = ' + JSON.stringify(multiArgs) + '\n'
+
+  var withCallback = options.withCallback ?
+    'var lastType = typeof arguments[len - 1]\n'
+    + 'if (lastType === "function") return $$__fn__$$.apply(self, arguments)\n'
+   : ''
+
+  return '(function ' + name + '() {\n'
+    + 'var self = this\n'
+    + 'var len = arguments.length\n'
+    + multiArgs
+    + withCallback
+    + 'var args = new Array(len + 1)\n'
+    + 'for (var i = 0; i < len; ++i) args[i] = arguments[i]\n'
+    + 'var lastIndex = i\n'
+    + 'return new Promise(function (resolve, reject) {\n'
+      + 'args[lastIndex] = createCallback(resolve, reject, multiArgs)\n'
+      + '$$__fn__$$.apply(self, args)\n'
+    + '})\n'
+  + '})'
+}