fix: add invite code generate check to avoid duplicated invite code

Author: moonrailgun

pnpm-lock.yaml

@@ -11,6 +11,7 @@ import type { Types } from 'mongoose';
 import { nanoid } from 'nanoid';
 import { User } from '../user/user';
 import { Group } from './group';
+import promiseRetry from 'promise-retry';
 
 function generateCode() {
   return nanoid(8);
@@ -73,9 +74,27 @@ export class GroupInvite extends TimeStamps implements Base {
       expiredAt = undefined;
     }
 
+    const code = await promiseRetry(
+      async () => {
+        const code = generateCode();
+        const exists = await this.exists({ code });
+
+        if (exists) {
+          throw new Error('Cannot find unused invite code, please try again.');
+        }
+
+        return code;
+      },
+      {
+        minTimeout: 0,
+        maxTimeout: 0,
+        retries: 5,
+      }
+    );
+
     const invite = await this.create({
       groupId,
-      code: generateCode(),
+      code,
       creator,
       expiredAt,
     });

server/models/group/invite.ts

@@ -67,6 +67,7 @@
     "nodemailer": "^6.7.2",
     "oidc-provider": "^7.10.6",
     "p-map": "^4.0.0",
+    "promise-retry": "^2.0.1",
     "qs": "^6.10.3",
     "redlock": "^4.2.0",
     "send": "^0.18.0",
@@ -98,6 +99,7 @@
     "@types/node": "16.11.7",
     "@types/nodemailer": "^6.4.4",
     "@types/oidc-provider": "^7.8.1",
+    "@types/promise-retry": "^1.1.3",
     "@types/send": "^0.17.1",
     "@types/serve-static": "^1.15.0",
     "@types/swagger-jsdoc": "^6.0.1",