[media.ccc.de] Fix NPE in search results if they contain a future talk

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/MediaCCCParsingHelper.java

@@ -28,9 +28,9 @@ public final class MediaCCCParsingHelper {
         }
     }
 
-    public static boolean isLiveStreamId(final String url) {
+    public static boolean isLiveStreamId(final String id) {
         final String pattern = "\\w+/\\w+";
-        return Pattern.matches(pattern, url); // {conference_slug}/{room_slug}
+        return Pattern.matches(pattern, id); // {conference_slug}/{room_slug}
     }
 
     public static JsonArray getLiveStreams(final Downloader downloader, final Localization localization) throws ExtractionException {

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/MediaCCCSearchExtractor.java

@@ -81,8 +81,13 @@ public class MediaCCCSearchExtractor extends SearchExtractor {
                 || getLinkHandler().getContentFilters().isEmpty()) {
             JsonArray events = doc.getArray("events");
             for (int i = 0; i < events.size(); i++) {
-                searchItems.commit(new MediaCCCStreamInfoItemExtractor(
-                        events.getObject(i)));
+                // Ensure only uploaded talks are shown in the search results.
+                // If the release date is null, the talk has not been held or uploaded yet
+                // and no streams are going to be available anyway.
+                if (events.getObject(i).getString("release_date") != null) {
+                    searchItems.commit(new MediaCCCStreamInfoItemExtractor(
+                            events.getObject(i)));
+                }
             }
         }
         return new InfoItemsPage<>(searchItems, null);
@@ -105,7 +110,7 @@ public class MediaCCCSearchExtractor extends SearchExtractor {
             try {
                 doc = JsonParser.object().from(site);
             } catch (JsonParserException jpe) {
-                throw new ExtractionException("Could not parse json.", jpe);
+                throw new ExtractionException("Could not parse JSON.", jpe);
             }
         }
         if (getLinkHandler().getContentFilters().contains(CONFERENCES)

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/infoItems/MediaCCCStreamInfoItemExtractor.java

@@ -56,7 +56,11 @@ public class MediaCCCStreamInfoItemExtractor implements StreamInfoItemExtractor
     @Nullable
     @Override
     public DateWrapper getUploadDate() throws ParsingException {
-        return new DateWrapper(MediaCCCParsingHelper.parseDateFrom(getTextualUploadDate()));
+        final String date = getTextualUploadDate();
+        if (date == null) {
+            return null; // event is in the future...
+        }
+        return new DateWrapper(MediaCCCParsingHelper.parseDateFrom(date));
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/linkHandler/MediaCCCSearchQueryHandlerFactory.java

@@ -33,7 +33,7 @@ public class MediaCCCSearchQueryHandlerFactory extends SearchQueryHandlerFactory
             return "https://media.ccc.de/public/events/search?q="
                     + URLEncoder.encode(query, "UTF-8");
         } catch (UnsupportedEncodingException e) {
-            throw new ParsingException("Could not create search string with querry: " + query, e);
+            throw new ParsingException("Could not create search string with query: " + query, e);
         }
     }
 }