[Bandcamp] Implement PlaylistExtractor.getDescsription()

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampPlaylistExtractor.java

@@ -11,6 +11,8 @@ import com.grack.nanojson.JsonParserException;
 
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.downloader.Downloader;
@@ -25,6 +27,7 @@ import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import java.io.IOException;
+import java.util.Objects;
 
 import javax.annotation.Nonnull;
 
@@ -112,7 +115,27 @@ public class BandcampPlaylistExtractor extends PlaylistExtractor {
     @Nonnull
     @Override
     public Description getDescription() throws ParsingException {
-        return Description.EMPTY_DESCRIPTION;
+        final Element tInfo = document.getElementById("trackInfo");
+        if (tInfo == null) {
+            throw new ParsingException("Could not find trackInfo in document");
+        }
+        final Elements about = tInfo.getElementsByClass("tralbum-about");
+        final Elements credits = tInfo.getElementsByClass("tralbum-credits");
+        final Element license = document.getElementById("license");
+        if (about.isEmpty() && credits.isEmpty() && license == null) {
+            return Description.EMPTY_DESCRIPTION;
+        }
+        final StringBuilder sb = new StringBuilder();
+        if (!about.isEmpty()) {
+            sb.append(Objects.requireNonNull(about.first()).html());
+        }
+        if (!credits.isEmpty()) {
+            sb.append(Objects.requireNonNull(credits.first()).html());
+        }
+        if (license != null) {
+            sb.append(license.html());
+        }
+        return new Description(sb.toString(), Description.HTML);
     }
 
     @Nonnull

extractor/src/test/java/org/schabi/newpipe/extractor/services/bandcamp/BandcampPlaylistExtractorTest.java

@@ -13,12 +13,14 @@ import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
 import org.schabi.newpipe.extractor.services.BasePlaylistExtractorTest;
 import org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampPlaylistExtractor;
+import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
 import java.io.IOException;
 import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.*;
+import static org.schabi.newpipe.extractor.ExtractorAsserts.assertContains;
 import static org.schabi.newpipe.extractor.ServiceList.Bandcamp;
 
 /**
@@ -135,6 +137,16 @@ public class BandcampPlaylistExtractorTest {
             assertEquals(5, extractor.getStreamCount());
         }
 
+        @Test
+        public void testDescription() throws ParsingException {
+            final Description description = extractor.getDescription();
+            assertNotEquals(Description.EMPTY_DESCRIPTION, description);
+            assertContains("Artwork by Shona Radcliffe", description.getContent()); // about
+            assertContains("All tracks written, produced and recorded by Mac Benson",
+                    description.getContent()); // credits
+            assertContains("all rights reserved", description.getContent()); // license
+        }
+
         @Override
         public void testUploaderVerified() throws Exception {
             assertFalse(extractor.isUploaderVerified());