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1 files changed, 96 insertions, 0 deletions

diff --git a/node_modules/uid-safe/index.js b/node_modules/uid-safe/index.js
new file mode 100644
index 0000000..9bef704
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+++ b/node_modules/uid-safe/index.js
@@ -0,0 +1,96 @@
+/*!
+ * uid-safe
+ * Copyright(c) 2014 Jonathan Ong
+ * Copyright(c) 2015-2016 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var escape = require('base64-url').escape
+var randomBytes = require('random-bytes')
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = uid
+module.exports.sync = uidSync
+
+/**
+ * Create a unique ID.
+ *
+ * @param {number} length
+ * @param {function} [callback]
+ * @return {Promise}
+ * @public
+ */
+
+function uid(length, callback) {
+  // validate callback is a function, if provided
+  if (callback !== undefined && typeof callback !== 'function') {
+    throw new TypeError('argument callback must be a function')
+  }
+
+  // require the callback without promises
+  if (!callback && !global.Promise) {
+    throw new TypeError('argument callback is required')
+  }
+
+  if (callback) {
+    // classic callback style
+    return generateUid(length, callback)
+  }
+
+  return new Promise(function executor(resolve, reject) {
+    generateUid(length, function onUid(err, str) {
+      if (err) return reject(err)
+      resolve(str)
+    })
+  })
+}
+
+/**
+ * Create a unique ID sync.
+ *
+ * @param {number} length
+ * @return {string}
+ * @public
+ */
+
+function uidSync(length) {
+  return toString(randomBytes.sync(length))
+}
+
+/**
+ * Generate a unique ID string.
+ *
+ * @param {number} length
+ * @param {function} callback
+ * @private
+ */
+
+function generateUid(length, callback) {
+  randomBytes(length, function (err, buf) {
+    if (err) return callback(err)
+    callback(null, toString(buf))
+  })
+}
+
+/**
+ * Change a Buffer into a string.
+ *
+ * @param {Buffer} buf
+ * @return {string}
+ * @private
+ */
+
+function toString(buf) {
+  return escape(buf.toString('base64'))
+}