refresh api token if necessary

src/main/java/sh/adb/RandomRedditMemesAPI/RedditAPI.java

@@ -39,7 +39,10 @@ public class RedditAPI {
         client = new RedditHttpClient(userAgent, HttpClientBuilder.create().build());
 
         // Create token (will be valid for 1 hour)
-        token = agent.tokenAppOnly(false);
+        newToken();
+    }
+    public void newToken() throws RedditOAuthException {
+        this.token = this.agent.tokenAppOnly(false);
         System.out.println("Access Token: " + token.getAccessToken());
         System.out.println("Token Type: " + token.getTokenType());
         System.out.println("Refreshable: " + token.isRefreshable());
@@ -48,10 +51,8 @@ public class RedditAPI {
         System.out.println("Will expire in 61 minutes: " + token.willExpireIn((long) 3660));
         System.out.println("Will expire in 59 minutes: " + token.willExpireIn((long) 3540));
     }
-    public void newToken() throws RedditOAuthException {
-        this.token = this.agent.tokenAppOnly(false);
-    }
-    public List<Submission> getSub(String subreddit) throws RedditParseException {
+    public List<Submission> getSub(String subreddit) throws RedditParseException, RedditOAuthException {
+        if (token.willExpireIn((long) 120)) newToken();
         SubmissionsListingParser parser = new SubmissionsListingParser();
         SubmissionsOfSubredditRequest request = (SubmissionsOfSubredditRequest) new SubmissionsOfSubredditRequest(subreddit, SubmissionSort.HOT).setLimit(100);
         List<Submission> submissions = parser.parse(client.get(token, request));