Fix #3: Fixing Refreshing Token feature

- Deleting existing token and refreshing all token
- Refreshing token error fix

Fixes: #9

src/main/java/S10P22D204/authentication/common/jwt/JwtManager.java

@@ -54,19 +54,27 @@ public Mono<Void> createRefreshToken(String internalId, ServerWebExchange exchan
  public Mono<String> checkAccessToken(ServerWebExchange exchange) {
  return Mono.justOrEmpty(exchange.getRequest().getCookies().getFirst("ACCESS_TOKEN"))
  .flatMap(cookie -> tokenRepository.getToken(cookie.getValue())
- .switchIfEmpty(checkRefreshToken(exchange).mapNotNull(internalId -> "null")))
+ .switchIfEmpty(Mono.defer(() -> checkRefreshToken(exchange)))
+ )
  .defaultIfEmpty("null");
  }
 
  public Mono<String> checkRefreshToken(ServerWebExchange exchange) {
  return Mono.justOrEmpty(exchange.getRequest().getCookies().getFirst("REFRESH_TOKEN"))
  .flatMap(cookie -> tokenRepository.getToken(cookie.getValue())
- .flatMap(internalId -> regenerateToken(internalId, exchange).thenReturn(internalId)))
+ .flatMap(internalId ->
+ tokenRepository.deleteToken(cookie.getValue())
+ .then(regenerateToken(internalId, exchange))
+ .thenReturn(internalId))
+ )
  .defaultIfEmpty("null");
  }
 
+
  public Mono<Void> regenerateToken(String internalId, ServerWebExchange exchange) {
- return createAccessToken(internalId, exchange)
+ return Mono.justOrEmpty(exchange.getRequest().getCookies().getFirst("REFRESH_TOKEN"))
+ .flatMap(cookie -> tokenRepository.deleteToken(cookie.getValue()))
+ .then(createAccessToken(internalId, exchange))
  .then(createRefreshToken(internalId, exchange));
  }