Reemplace shortid with nanoid in background with alphabet and length configurable #810

server/lib/shortid.js

@@ -0,0 +1,27 @@
+"use strict";
+
+// Modules
+const nanoid = require('nanoid');
+const config = require('./config');
+
+// Default hardcoded values
+let alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+let customlength = 10;
+
+// Gets from config if defined
+if (config.cid && config.cid.alphabet) alphabet=config.cid.alphabet;
+if (config.cid && config.cid.length) customlength=config.cid.length;
+
+// Create custom nanoid
+const customnanoid = nanoid.customAlphabet(alphabet, customlength);
+
+const re = new RegExp('['+alphabet+']{'+customlength+'}');
+
+// Implements the public methods of shortid module with nanoid and export them
+module.exports.generate = function() {
+  return customnanoid();
+}
+
+module.exports.isValid = function(id) {
+  return re.test(id);
+}