Deduped code; Using default values...

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfoItemExtractor.java

@@ -9,6 +9,7 @@ import org.schabi.newpipe.extractor.utils.Utils;
 import javax.annotation.Nullable;
 
 public interface CommentsInfoItemExtractor extends InfoItemExtractor {
+
     /**
      * The formatted text (e.g. 420, 4K, 4.2M) of the votes
      *
@@ -21,14 +22,18 @@ public interface CommentsInfoItemExtractor extends InfoItemExtractor {
     /**
      * The text of the comment
      */
-    String getCommentText() throws ParsingException;
+    default String getCommentText() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
     /**
      * The upload date given by the service, unmodified
      *
      * @see StreamExtractor#getTextualUploadDate()
      */
-    String getTextualUploadDate() throws ParsingException;
+    default String getTextualUploadDate() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
     /**
      * The upload date wrapped with DateWrapper class
@@ -36,28 +41,44 @@ public interface CommentsInfoItemExtractor extends InfoItemExtractor {
      * @see StreamExtractor#getUploadDate()
      */
     @Nullable
-    DateWrapper getUploadDate() throws ParsingException;
+    default DateWrapper getUploadDate() throws ParsingException {
+        return null;
+    }
 
-    String getCommentId() throws ParsingException;
+    default String getCommentId() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
-    String getUploaderUrl() throws ParsingException;
+    default String getUploaderUrl() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
-    String getUploaderName() throws ParsingException;
+    default String getUploaderName() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
-    String getUploaderAvatarUrl() throws ParsingException;
+    default String getUploaderAvatarUrl() throws ParsingException {
+        return Utils.EMPTY_STRING;
+    }
 
     /**
      * Whether the comment has been hearted by the uploader
      */
-    boolean isHeartedByUploader() throws ParsingException;
+    default boolean isHeartedByUploader() throws ParsingException {
+        return false;
+    }
 
     /**
      * Whether the comment is pinned
      */
-    boolean isPinned() throws ParsingException;
+    default boolean isPinned() throws ParsingException {
+        return false;
+    }
 
     /**
      * Whether the uploader is verified by the service
      */
-    boolean isUploaderVerified() throws ParsingException;
+    default boolean isUploaderVerified() throws ParsingException {
+        return false;
+    }
 }

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

@@ -3,9 +3,6 @@ package org.schabi.newpipe.extractor.services.bandcamp.extractors;
 import org.jsoup.nodes.Element;
 import org.schabi.newpipe.extractor.comments.CommentsInfoItemExtractor;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.localization.DateWrapper;
-
-import javax.annotation.Nullable;
 
 public class BandcampCommentsInfoItemExtractor implements CommentsInfoItemExtractor {
 
@@ -37,29 +34,6 @@ public class BandcampCommentsInfoItemExtractor implements CommentsInfoItemExtrac
         return writing.getElementsByClass("text").first().ownText();
     }
 
-    @Override
-    public String getTextualUploadDate() {
-        return "";
-    }
-
-    @Nullable
-    @Override
-    public DateWrapper getUploadDate() {
-        return null;
-    }
-
-    @Override
-    public String getCommentId() {
-        return "";
-    }
-
-    @Override
-    public String getUploaderUrl() {
-        //return writing.getElementsByClass("name").attr("href");
-        // Fan links cannot be opened
-        return "";
-    }
-
     @Override
     public String getUploaderName() throws ParsingException {
         return writing.getElementsByClass("name").first().text();
@@ -69,19 +43,4 @@ public class BandcampCommentsInfoItemExtractor implements CommentsInfoItemExtrac
     public String getUploaderAvatarUrl() {
         return writing.getElementsByClass("thumb").attr("src");
     }
-
-    @Override
-    public boolean isHeartedByUploader() {
-        return false;
-    }
-
-    @Override
-    public boolean isPinned() {
-        return false;
-    }
-
-    @Override
-    public boolean isUploaderVerified() throws ParsingException {
-        return false;
-    }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/peertube/extractors/PeertubeCommentsInfoItemExtractor.java

@@ -84,21 +84,6 @@ public class PeertubeCommentsInfoItemExtractor implements CommentsInfoItemExtrac
         return baseUrl + value;
     }
 
-    @Override
-    public boolean isHeartedByUploader() throws ParsingException {
-        return false;
-    }
-
-    @Override
-    public boolean isPinned() throws ParsingException {
-        return false;
-    }
-
-    @Override
-    public boolean isUploaderVerified() throws ParsingException {
-        return false;
-    }
-
     @Override
     public String getUploaderName() throws ParsingException {
         return JsonUtils.getString(item, "account.name") + "@" + JsonUtils.getString(item, "account.host");

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudCommentsInfoItemExtractor.java

@@ -38,16 +38,6 @@ public class SoundcloudCommentsInfoItemExtractor implements CommentsInfoItemExtr
         return json.getObject("user").getString("avatar_url");
     }
 
-    @Override
-    public boolean isHeartedByUploader() throws ParsingException {
-        return false;
-    }
-
-    @Override
-    public boolean isPinned() throws ParsingException {
-        return false;
-    }
-
     @Override
     public boolean isUploaderVerified() throws ParsingException {
         return json.getObject("user").getBoolean("verified");