[YouTube] Parse watching count in live streams items

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

@@ -304,12 +304,65 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     public long getViewCount() throws ParsingException {
         assertPageFetched();
         try {
+            if (getStreamType().equals(StreamType.LIVE_STREAM)) {
+                return getLiveStreamWatchingCount();
+            }
+
             return Long.parseLong(doc.select("meta[itemprop=interactionCount]").attr(CONTENT));
         } catch (Exception e) {//todo: find fallback method
             throw new ParsingException("Could not get number of views", e);
         }
     }
 
+    private long getLiveStreamWatchingCount() throws ExtractionException, IOException, JsonParserException {
+        // https://www.youtube.com/youtubei/v1/updated_metadata?alt=json&key=
+        String innerTubeKey = null, clientVersion = null;
+        if (playerArgs != null && !playerArgs.isEmpty()) {
+            innerTubeKey = playerArgs.getString("innertube_api_key");
+            clientVersion = playerArgs.getString("innertube_context_client_version");
+        } else if (!videoInfoPage.isEmpty()) {
+            innerTubeKey = videoInfoPage.get("innertube_api_key");
+            clientVersion = videoInfoPage.get("innertube_context_client_version");
+        }
+
+        if (innerTubeKey == null || innerTubeKey.isEmpty()) {
+            throw new ExtractionException("Couldn't get innerTube key");
+        }
+
+        if (clientVersion == null || clientVersion.isEmpty()) {
+            throw new ExtractionException("Couldn't get innerTube client version");
+        }
+
+        final String metadataUrl = "https://www.youtube.com/youtubei/v1/updated_metadata?alt=json&key=" + innerTubeKey;
+        final byte[] dataBody = ("{\"context\":{\"client\":{\"clientName\":1,\"clientVersion\":\"" + clientVersion + "\"}}" +
+                ",\"videoId\":\"" + getId() + "\"}").getBytes("UTF-8");
+        final Response response = getDownloader().execute(Request.newBuilder()
+                .post(metadataUrl, dataBody)
+                .addHeader("Content-Type", "application/json")
+                .build());
+        final JsonObject jsonObject = JsonParser.object().from(response.responseBody());
+
+        for (Object actionEntry : jsonObject.getArray("actions")) {
+            if (!(actionEntry instanceof JsonObject)) continue;
+            final JsonObject entry = (JsonObject) actionEntry;
+
+            final JsonObject updateViewershipAction = entry.getObject("updateViewershipAction", null);
+            if (updateViewershipAction == null) continue;
+
+            final JsonArray viewCountRuns = JsonUtils.getArray(updateViewershipAction, "viewership.videoViewCountRenderer.viewCount.runs");
+            if (viewCountRuns.isEmpty()) continue;
+
+            final JsonObject textObject = viewCountRuns.getObject(0);
+            if (!textObject.has("text")) {
+                throw new ExtractionException("Response don't have \"text\" element");
+            }
+
+            return Long.parseLong(Utils.removeNonDigitCharacters(textObject.getString("text")));
+        }
+
+        throw new ExtractionException("Could not find correct results in response");
+    }
+
     @Override
     public long getLikeCount() throws ParsingException {
         assertPageFetched();

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

@@ -3,10 +3,10 @@ package org.schabi.newpipe.extractor.services.youtube.extractors;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.localization.TimeAgoParser;
 import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemExtractor;
 import org.schabi.newpipe.extractor.stream.StreamType;
-import org.schabi.newpipe.extractor.localization.TimeAgoParser;
 import org.schabi.newpipe.extractor.utils.Utils;
 
 import javax.annotation.Nullable;
@@ -141,6 +141,10 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
 
     @Override
     public String getTextualUploadDate() throws ParsingException {
+        if (getStreamType().equals(StreamType.LIVE_STREAM)) {
+            return null;
+        }
+
         if (cachedUploadDate != null) {
             return cachedUploadDate;
         }
@@ -160,9 +164,12 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
 
     @Override
     public Calendar getUploadDate() throws ParsingException {
+        if (getStreamType().equals(StreamType.LIVE_STREAM)) {
+            return null;
+        }
+
         String textualUploadDate = getTextualUploadDate();
-        if (timeAgoParser != null
-                && textualUploadDate != null && !"".equals(textualUploadDate)) {
+        if (timeAgoParser != null && textualUploadDate != null && !textualUploadDate.isEmpty()) {
             return timeAgoParser.parse(textualUploadDate);
         } else {
             return null;
@@ -172,24 +179,35 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
     @Override
     public long getViewCount() throws ParsingException {
         String input;
-        try {
-            // TODO: Return the actual live stream's watcher count
-            // -1 for no view count
-            if (getStreamType() == StreamType.LIVE_STREAM) return -1;
 
+        if (getStreamType().equals(StreamType.LIVE_STREAM)) {
+            Element meta = item.select("ul[class=\"yt-lockup-meta-info\"]").first();
+            if (meta == null) return 0;
+
+            final Elements li = meta.select("li");
+            if (li.isEmpty()) return 0;
+
+            input = li.first().text();
+        } else {
+            try {
                 Element meta = item.select("div[class=\"yt-lockup-meta\"]").first();
                 if (meta == null) return -1;
 
                 // This case can happen if google releases a special video
-            if(meta.select("li").size() < 2)  return -1;
+                if (meta.select("li").size() < 2) return -1;
 
                 input = meta.select("li").get(1).text();
-
             } catch (IndexOutOfBoundsException e) {
                 throw new ParsingException("Could not parse yt-lockup-meta although available: " + getUrl(), e);
             }
+        }
+
+        if (input == null) {
+            throw new ParsingException("Input is null");
+        }
 
         try {
+
             return Long.parseLong(Utils.removeNonDigitCharacters(input));
         } catch (NumberFormatException e) {
             // if this happens the video probably has no views

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java

@@ -68,7 +68,7 @@ public class YoutubeStreamExtractorLivestreamTest {
     @Test
     public void testGetViewCount() throws ParsingException {
         long count = extractor.getViewCount();
-        assertTrue(Long.toString(count), count >= 7148995);
+        assertTrue(Long.toString(count), count > -1);
     }
 
     @Test