Move continuation_token out of Category struct

(cherry picked from commit 0e96eda28f25171a0344b972af1852a4d6fc3007)

src/invidious/helpers/extractors.cr

@@ -217,6 +217,7 @@ private class CategoryParser < ItemParser
       title = ""
     end
 
+    auxiliary_data = {} of String => String
     browse_endpoint = item_contents["endpoint"]?.try &.["browseEndpoint"] || nil
     browse_endpoint_data = ""
     category_type = 0 # 0: Video, 1: Channels, 2: Playlist/feed, 3: trending
@@ -233,7 +234,14 @@ private class CategoryParser < ItemParser
       # instead it uses the browseId parameter. So if there isn't a params value we can assume the
       # category is a playlist/feed
       if browse_endpoint["params"]?
-        browse_endpoint_data = browse_endpoint["params"].as_s
+        # However, even though the channel category type returns the browse endpoint param
+        # we're not going to be using it in order to preserve compatablity with Youtube.
+        # and for an URL that looks cleaner
+        url = item_contents["endpoint"]["commandMetadata"]["webCommandMetadata"]["url"]
+        url = URI.parse(url.as_s)
+        auxiliary_data["view"] = url.query_params["view"]
+        auxiliary_data["shelf_id"] = url.query_params["shelf_id"]
+
         category_type = 1
       else
         browse_endpoint_data = browse_endpoint["browseId"].as_s
@@ -271,7 +279,6 @@ private class CategoryParser < ItemParser
       title:                title,
       contents:             contents,
       browse_endpoint_data: browse_endpoint_data,
-      continuation_token:   nil,
       badges:               badges,
     })
   end

src/invidious/helpers/invidiousitems.cr

@@ -232,7 +232,6 @@ class Category
   property title : String
   property contents : Array(SearchItem) | SearchItem
   property browse_endpoint_data : String?
-  property continuation_token : String?
   property badges : Array(Tuple(String, String))?
 
   def to_json(locale, json : JSON::Builder)