[Youtube] Extract initial playlist info

Author: XiangRongLin

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

@@ -1,5 +1,9 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeParsingHelper.getJsonResponse;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
 import java.io.IOException;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -24,6 +28,7 @@
  */
 public class YoutubeMixPlaylistExtractor extends PlaylistExtractor {
 
+  private JsonObject initialData;
   private Document doc;
 
   public YoutubeMixPlaylistExtractor(StreamingService service, ListLinkHandler linkHandler) {
@@ -32,9 +37,14 @@ public YoutubeMixPlaylistExtractor(StreamingService service, ListLinkHandler lin
 
   @Override
   public void onFetchPage(@Nonnull Downloader downloader) throws IOException, ExtractionException {
-    final String url = getUrl();
-    final Response response = downloader.get(url, getExtractorLocalization());
-    doc = YoutubeParsingHelper.parseAndCheckPage(url, response);
+    final String url = getUrl() + "&pbj=1";
+    final JsonArray ajaxJson = getJsonResponse(url, getExtractorLocalization());
+    initialData = ajaxJson.getObject(3).getObject("response");
+    JsonObject a = initialData.getObject("contents");
+    JsonObject b = initialData.getObject("contents").getObject("twoColumnWatchNextResults");
+    JsonObject c = initialData.getObject("contents");
+    JsonObject playlist = initialData.getObject("contents").getObject("twoColumnWatchNextResults").getObject("playlist").getObject("playlist");
+    System.out.println();
   }
 
   @Nonnull
@@ -127,76 +137,76 @@ private void collectStreamsFrom(
     final LinkHandlerFactory streamLinkHandlerFactory = getService().getStreamLHFactory();
     final TimeAgoParser timeAgoParser = getTimeAgoParser();
 
-    for (final Element li : element.children()) {
-
-      collector.commit(new YoutubeStreamInfoItemExtractor(li, timeAgoParser) {
-
-        @Override
-        public boolean isAd() {
-          return false;
-        }
-
-        @Override
-        public String getUrl() throws ParsingException {
-          try {
-            return streamLinkHandlerFactory.fromId(li.attr("data-video-id")).getUrl();
-          } catch (Exception e) {
-            throw new ParsingException("Could not get web page url for the video", e);
-          }
-        }
-
-        @Override
-        public String getName() throws ParsingException {
-          try {
-            return li.attr("data-video-title");
-          } catch (Exception e) {
-            throw new ParsingException("Could not get name", e);
-          }
-        }
-
-        @Override
-        public long getDuration() {
-          //Not present in doc
-          return 0;
-        }
-
-        @Override
-        public String getUploaderName() throws ParsingException {
-          String uploaderName = li.attr("data-video-username");
-          if (uploaderName == null || uploaderName.isEmpty()) {
-            throw new ParsingException("Could not get uploader name");
-          } else {
-            return uploaderName;
-          }
-        }
-
-        @Override
-        public String getUploaderUrl() {
-          //Not present in doc
-          return "";
-        }
-
-        @Override
-        public String getTextualUploadDate() {
-          //Not present in doc
-          return "";
-        }
-
-        @Override
-        public long getViewCount() {
-          return -1;
-        }
-
-        @Override
-        public String getThumbnailUrl() throws ParsingException {
-          try {
-            return getThumbnailUrlFromId(streamLinkHandlerFactory.fromUrl(getUrl()).getId());
-          } catch (Exception e) {
-            throw new ParsingException("Could not get thumbnail url", e);
-          }
-        }
-      });
-    }
+//    for (final Element li : element.children()) {
+//
+//      collector.commit(new YoutubeStreamInfoItemExtractor(li, timeAgoParser) {
+//
+//        @Override
+//        public boolean isAd() {
+//          return false;
+//        }
+//
+//        @Override
+//        public String getUrl() throws ParsingException {
+//          try {
+//            return streamLinkHandlerFactory.fromId(li.attr("data-video-id")).getUrl();
+//          } catch (Exception e) {
+//            throw new ParsingException("Could not get web page url for the video", e);
+//          }
+//        }
+//
+//        @Override
+//        public String getName() throws ParsingException {
+//          try {
+//            return li.attr("data-video-title");
+//          } catch (Exception e) {
+//            throw new ParsingException("Could not get name", e);
+//          }
+//        }
+//
+//        @Override
+//        public long getDuration() {
+//          //Not present in doc
+//          return 0;
+//        }
+//
+//        @Override
+//        public String getUploaderName() throws ParsingException {
+//          String uploaderName = li.attr("data-video-username");
+//          if (uploaderName == null || uploaderName.isEmpty()) {
+//            throw new ParsingException("Could not get uploader name");
+//          } else {
+//            return uploaderName;
+//          }
+//        }
+//
+//        @Override
+//        public String getUploaderUrl() {
+//          //Not present in doc
+//          return "";
+//        }
+//
+//        @Override
+//        public String getTextualUploadDate() {
+//          //Not present in doc
+//          return "";
+//        }
+//
+//        @Override
+//        public long getViewCount() {
+//          return -1;
+//        }
+//
+//        @Override
+//        public String getThumbnailUrl() throws ParsingException {
+//          try {
+//            return getThumbnailUrlFromId(streamLinkHandlerFactory.fromUrl(getUrl()).getId());
+//          } catch (Exception e) {
+//            throw new ParsingException("Could not get thumbnail url", e);
+//          }
+//        }
+//      });
+//    }
   }
 
   private String getThumbnailUrlFromId(String videoId) {