auth: Run removeInvalidTokens 5s after startup

This should prevent problem with the AuthToken purge on Sundays, as the service is either running on sunday or will be restarted there after.

Also move base64url comment to right function

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/auth/auth.service.ts

@@ -21,7 +21,7 @@ import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
 import { ConsoleLoggerService } from '../logger/console-logger.service';
 import { TimestampMillis } from '../utils/timestamp';
-import { Cron } from '@nestjs/schedule';
+import { Cron, Timeout } from '@nestjs/schedule';
 
 @Injectable()
 export class AuthService {
@@ -58,9 +58,6 @@ export class AuthService {
   }
 
   async randomString(length: number): Promise<Buffer> {
-    // This is necessary as the is no base64url encoding in the toString method
-    // but as can be seen on https://tools.ietf.org/html/rfc4648#page-7
-    // base64url is quite easy buildable from base64
     if (length <= 0) {
       return null;
     }
@@ -68,6 +65,9 @@ export class AuthService {
   }
 
   BufferToBase64Url(text: Buffer): string {
+    // This is necessary as the is no base64url encoding in the toString method
+    // but as can be seen on https://tools.ietf.org/html/rfc4648#page-7
+    // base64url is quite easy buildable from base64
     return text
       .toString('base64')
       .replace('+', '-')
@@ -205,12 +205,28 @@ export class AuthService {
   // Delete all non valid tokens  every sunday on 3:00 AM
   @Cron('0 0 3 * * 0')
   async handleCron() {
+    return this.removeInvalidTokens();
+  }
+
+  // Delete all non valid tokens 5 sec after startup
+  @Timeout(5000)
+  async handleTimeout() {
+    return this.removeInvalidTokens();
+  }
+
+  async removeInvalidTokens() {
     const currentTime = new Date().getTime();
     const tokens: AuthToken[] = await this.authTokenRepository.find();
+    let removedTokens = 0;
     for (const token of tokens) {
       if (token.validUntil && token.validUntil.getTime() <= currentTime) {
+        this.logger.debug(`AuthToken '${token.keyId}' was removed`);
         await this.authTokenRepository.remove(token);
+        removedTokens++;
       }
     }
+    this.logger.log(
+      `${removedTokens} invalid AuthTokens were purged from the DB.`,
+    );
   }
 }