[YouTube] Make non-extraction of videoPrimaryInfoRenderer and/or videoSecondaryInfoRenderer not fatal

Also de-duplicated common code related to the obtain of these video info renderers.

This change allows extraction of videos without visual metadata.

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

@@ -204,10 +204,12 @@ public class YoutubeStreamExtractor extends StreamExtractor {
             return null;
         }
 
-        if (getTextFromObject(getVideoPrimaryInfoRenderer().getObject("dateText"))
+        final String videoPrimaryInfoRendererDateText =
-                .startsWith("Premiered")) {
+                getTextFromObject(getVideoPrimaryInfoRenderer().getObject("dateText"));
-            final String time = getTextFromObject(
+
-                    getVideoPrimaryInfoRenderer().getObject("dateText")).substring(13);
+        if (videoPrimaryInfoRendererDateText != null) {
+            if (videoPrimaryInfoRendererDateText.startsWith("Premiered")) {
+                final String time = videoPrimaryInfoRendererDateText.substring(13);
 
                 try { // Premiered 20 hours ago
                     final TimeAgoParser timeAgoParser = TimeAgoPatternsManager.getTimeAgoParserFor(
@@ -233,16 +235,17 @@ public class YoutubeStreamExtractor extends StreamExtractor {
             }
 
             try {
-            // TODO: this parses English formatted dates only, we need a better approach to parse
+                // TODO: this parses English formatted dates only, we need a better approach to
-            //  the textual date
+                //  parse the textual date
-            final LocalDate localDate = LocalDate.parse(getTextFromObject(
+                final LocalDate localDate = LocalDate.parse(videoPrimaryInfoRendererDateText,
-                    getVideoPrimaryInfoRenderer().getObject("dateText")),
                         DateTimeFormatter.ofPattern("dd MMM yyyy", Locale.ENGLISH));
                 return DateTimeFormatter.ISO_LOCAL_DATE.format(localDate);
             } catch (final Exception e) {
                 throw new ParsingException("Could not get upload date", e);
             }
+        }
 
+        throw new ParsingException("Could not get upload date");
     }
 
     @Override
@@ -565,19 +568,13 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     public String getUploaderAvatarUrl() throws ParsingException {
         assertPageFetched();
 
-        String url = null;
+        final String url = getVideoSecondaryInfoRenderer()
-
-        try {
-            url = getVideoSecondaryInfoRenderer()
                 .getObject("owner")
                 .getObject("videoOwnerRenderer")
                 .getObject("thumbnail")
                 .getArray("thumbnails")
                 .getObject(0)
                 .getString("url");
-        } catch (final ParsingException ignored) {
-            // Age-restricted videos cause a ParsingException here
-        }
 
         if (isNullOrEmpty(url)) {
             if (ageLimit == NO_AGE_LIMIT) {
@@ -1212,40 +1209,29 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     // Utils
     //////////////////////////////////////////////////////////////////////////*/
 
-    private JsonObject getVideoPrimaryInfoRenderer() throws ParsingException {
+    @Nonnull
+    private JsonObject getVideoPrimaryInfoRenderer() {
         if (videoPrimaryInfoRenderer != null) {
             return videoPrimaryInfoRenderer;
         }
 
-        final JsonArray contents = nextResponse.getObject("contents")
+        videoPrimaryInfoRenderer = getVideoInfoRenderer("videoPrimaryInfoRenderer");
-                .getObject("twoColumnWatchNextResults").getObject("results").getObject("results")
+        return videoPrimaryInfoRenderer;
-                .getArray("contents");
-        JsonObject theVideoPrimaryInfoRenderer = null;
-
-        for (final Object content : contents) {
-            if (((JsonObject) content).has("videoPrimaryInfoRenderer")) {
-                theVideoPrimaryInfoRenderer = ((JsonObject) content)
-                        .getObject("videoPrimaryInfoRenderer");
-                break;
-            }
-        }
-
-        if (isNullOrEmpty(theVideoPrimaryInfoRenderer)) {
-            throw new ParsingException("Could not find videoPrimaryInfoRenderer");
-        }
-
-        videoPrimaryInfoRenderer = theVideoPrimaryInfoRenderer;
-        return theVideoPrimaryInfoRenderer;
     }
 
     @Nonnull
-    private JsonObject getVideoSecondaryInfoRenderer() throws ParsingException {
+    private JsonObject getVideoSecondaryInfoRenderer() {
         if (videoSecondaryInfoRenderer != null) {
             return videoSecondaryInfoRenderer;
         }
 
-        videoSecondaryInfoRenderer = nextResponse
+        videoSecondaryInfoRenderer = getVideoInfoRenderer("videoSecondaryInfoRenderer");
-                .getObject("contents")
+        return videoSecondaryInfoRenderer;
+    }
+
+    @Nonnull
+    private JsonObject getVideoInfoRenderer(@Nonnull final String videoRendererName) {
+        return nextResponse.getObject("contents")
                 .getObject("twoColumnWatchNextResults")
                 .getObject("results")
                 .getObject("results")
@@ -1253,13 +1239,10 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                 .stream()
                 .filter(JsonObject.class::isInstance)
                 .map(JsonObject.class::cast)
-                .filter(content -> content.has("videoSecondaryInfoRenderer"))
+                .filter(content -> content.has(videoRendererName))
-                .map(content -> content.getObject("videoSecondaryInfoRenderer"))
+                .map(content -> content.getObject(videoRendererName))
                 .findFirst()
-                .orElseThrow(
+                .orElse(new JsonObject());
-                        () -> new ParsingException("Could not find videoSecondaryInfoRenderer"));
-
-        return videoSecondaryInfoRenderer;
     }
 
     @Nonnull