Add structure of channel tags

Tags' getters and/or setters have been added in ChannelExtractor and
ChannelInfo to do so.

Co-authored-by: ThetaDev <t.testboy@gmail.com>

Author: 2 people

extractor/src/main/java/org/schabi/newpipe/extractor/channel/ChannelExtractor.java

@@ -47,4 +47,8 @@ protected ChannelExtractor(final StreamingService service, final ListLinkHandler
     public abstract boolean isVerified() throws ParsingException;
     @Nonnull
     public abstract List<ListLinkHandler> getTabs() throws ParsingException;
+    @Nonnull
+    public List<String> getTags() throws ParsingException {
+        return List.of();
+    }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/channel/ChannelInfo.java

@@ -123,6 +123,12 @@ public static ChannelInfo getInfo(final ChannelExtractor extractor)
             info.addError(e);
         }
 
+        try {
+            info.setTags(extractor.getTags());
+        } catch (final Exception e) {
+            info.addError(e);
+        }
+
         return info;
     }
 
@@ -136,8 +142,8 @@ public static ChannelInfo getInfo(final ChannelExtractor extractor)
     private String description;
     private String[] donationLinks;
     private boolean verified;
-
     private List<ListLinkHandler> tabs = List.of();
+    private List<String> tags = List.of();
 
     public String getParentChannelName() {
         return parentChannelName;
@@ -227,4 +233,13 @@ public List<ListLinkHandler> getTabs() {
     public void setTabs(@Nonnull final List<ListLinkHandler> tabs) {
         this.tabs = tabs;
     }
+
+    @Nonnull
+    public List<String> getTags() {
+        return tags;
+    }
+
+    public void setTags(@Nonnull final List<String> tags) {
+        this.tags = tags;
+    }
 }