Initial site commit

gulp/lib/random.js

@@ -0,0 +1,47 @@
+'use strict';
+
+var crypto = require('crypto');
+var uuid = require('uuid').v4;
+
+// based on code from http://stackoverflow.com/a/25690754/110189
+function randomString (length, chars) {
+  if (!chars) {
+    throw new Error('Argument \'chars\' is undefined');
+  }
+
+  var charsLength = chars.length;
+  if (charsLength > 256) {
+    throw new Error('Length must be less than 256 characters');
+  }
+
+  var randomBytes = crypto.randomBytes(length);
+
+  var result = new Array(length);
+
+  var cursor = 0;
+  for (var i = 0; i < length; i++) {
+    cursor += randomBytes[i];
+    result[i] = chars[cursor % charsLength];
+  }
+
+  return result.join('');
+}
+
+module.exports = exports = function (min, max) {
+  if (Array.isArray(min)) return exports.from(min);
+  if (typeof max === 'undefined') {
+    if (min > 0) {
+      max = min;
+      min = 0;
+    } else {
+      max = 0;
+    }
+  }
+  return Math.floor((Math.random() * (max - min + 1)) + min);
+};
+
+exports.alphanumeric = (length) => randomString(length, 'ABCDEFGHIJKLMNOPQRSTUWXYZ0123456789');
+exports.alpha = (length) => randomString(length, 'ABCDEFGHIJKLMNOPQRSTUWXYZ');
+exports.fromCharSet = randomString;
+exports.from = (array) => array[exports(array.length - 1)];
+exports.id = (length) => uuid().replace(/-/g, '').substr(0, length);