throws TagMyCodeUnauthorizedException if refresh token is not valid

Author: massimozappino

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+### Added
+- throws TagMyCodeUnauthorizedException if refresh token is not valid
+
 ## [1.2.0] - (2017-11-05)
 ### Changed
 - renamed LanguagesCollection and SnippetsCollection

src/main/java/com/tagmycode/sdk/Client.java

@@ -63,13 +63,21 @@ public void fetchOauthToken(String verificationCode) throws TagMyCodeException {
 
     public void refreshOauthToken() throws TagMyCodeException {
         try {
-            setOauthToken(service.getAccessTokenFromRefreshToken(oauthToken.getRefreshToken()));
+            fetchAndSetRefreshToken(service.getAccessTokenFromRefreshToken(oauthToken.getRefreshToken()));
         } catch (OAuthException e) {
-            //TODO if network error: throw unauthenticated only if server has a valid error response
-            throw new TagMyCodeException("Error fetching refresh token: " + e.getMessage());
+            String message = "Error fetching refresh token: " + e.getMessage();
+            if (e.getMessage().contains("refresh_token")) {
+                throw new TagMyCodeUnauthorizedException(message);
+            } else {
+                throw new TagMyCodeException(message);
+            }
         }
     }
 
+    protected void fetchAndSetRefreshToken(OauthToken accessTokenFromRefreshToken) throws TagMyCodeException {
+        setOauthToken(accessTokenFromRefreshToken);
+    }
+
     public String getAuthorizationUrl() {
         return service.getAuthorizationUrl(null);
     }

src/main/java/com/tagmycode/sdk/exception/TagMyCodeUnauthorizedException.java

@@ -5,4 +5,8 @@ public class TagMyCodeUnauthorizedException extends TagMyCodeException {
     public TagMyCodeUnauthorizedException() {
         super("Unauthorized");
     }
+
+    public TagMyCodeUnauthorizedException(String message) {
+        super(message);
+    }
 }