Don't cache comments count and return early on page fetch if no token.

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java

@@ -33,12 +33,7 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
     /**
      * Whether comments are disabled on video.
      */
-    private boolean commentsDisabled = true;
-
-    /**
-     * The total number of comments on video.
-     */
-    private int commentsCount = (int) ITEM_COUNT_UNKNOWN;
+    private boolean commentsDisabled;
 
     /**
      * The second ajax <b>/next</b> response.
@@ -268,6 +263,10 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
         final String initialToken =
                 findInitialCommentsToken(getJsonPostResponse("next", body, localization));
 
+        if (initialToken == null) {
+            return;
+        }
+
         // @formatter:off
         final byte[] ajaxBody = JsonWriter.string(
                         prepareDesktopJsonBuilder(localization, getExtractorContentCountry())
@@ -289,7 +288,10 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
     public int getCommentsCount() throws ExtractionException {
         assertPageFetched();
 
-        if (commentsCount == ITEM_COUNT_UNKNOWN) {
+        if (commentsDisabled) {
+            return -1;
+        }
+
         final JsonObject countText = ajaxJson
                 .getArray("onResponseReceivedEndpoints").getObject(0)
                 .getObject("reloadContinuationItemsCommand")
@@ -298,14 +300,11 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
                 .getObject("countText");
 
         try {
-                commentsCount = Integer.parseInt(
+            return Integer.parseInt(
                     Utils.removeNonDigitCharacters(getTextFromObject(countText))
             );
         } catch (final Exception e) {
             throw new ExtractionException("Unable to get comments count", e);
         }
     }
-
-        return commentsCount;
-    }
 }