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

server/config/default.yaml

@@ -55,6 +55,10 @@ enabledLanguages:
 # Inject custom scripts in subscription/layout.mjml.hbs
 # customSubscriptionScripts: [/custom/hello-world.js]
 
+# Customize the random string generation for cid
+cid:
+   alphabet: 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
+   length: 10
 
 # Enable to use Redis session cache or disable if Redis is not installed
 redis:

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);
+}

server/package.json

@@ -91,6 +91,7 @@
     "morgan": "^1.9.1",
     "multer": "^1.4.2",
     "mysql": "^2.17.1",
+    "nanoid": "^3.1.12",
     "node-ipc": "^9.1.1",
     "node-mocks-http": "^1.8.1",
     "node-object-hash": "^1.4.1",