Refactoring

app/src/main/java/eu/faircode/email/Log.java

@@ -144,6 +144,9 @@ public class Log {
     private static final int MAX_CRASH_REPORTS = 5;
     private static final String TAG = "fairemail";
 
+    static final String TOKEN_REFRESH_REQUIRED =
+            "Token refresh required. Is there a VPN based app running?";
+
     public static void setLevel(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         boolean debug = prefs.getBoolean("debug", false);
@@ -471,7 +474,7 @@ public class Log {
 
                     if (ex instanceof IllegalStateException &&
                             (no_internet.equals(ex.getMessage()) ||
-                                    "Token refreshed".equals(ex.getMessage()) ||
+                                    TOKEN_REFRESH_REQUIRED.equals(ex.getMessage()) ||
                                     "Not connected".equals(ex.getMessage()) ||
                                     "This operation is not allowed on a closed folder".equals(ex.getMessage())))
                         return false;
@@ -1505,7 +1508,7 @@ public class Log {
                 return null;
 
             if (ex instanceof IllegalStateException &&
-                    ("Token refreshed".equals(ex.getMessage()) ||
+                    (TOKEN_REFRESH_REQUIRED.equals(ex.getMessage()) ||
                             "Not connected".equals(ex.getMessage()) ||
                             "This operation is not allowed on a closed folder".equals(ex.getMessage())))
                 return null;

app/src/main/java/eu/faircode/email/ServiceAuthenticator.java

@@ -137,7 +137,7 @@ public class ServiceAuthenticator extends Authenticator {
         }
 
         if (expiration != null && expiration - keep_alive < new Date().getTime())
-            throw new IllegalStateException("Token refresh required. Is there a VPN based app running?");
+            throw new IllegalStateException(Log.TOKEN_REFRESH_REQUIRED);
     }
 
     interface IAuthenticated {