channel: use YT API to fetch playlist items

src/invidious/channels/playlists.cr

@@ -1,28 +1,30 @@
 def fetch_channel_playlists(ucid, author, continuation, sort_by)
   if continuation
-    response_json = YoutubeAPI.browse(continuation)
-    items, continuation = extract_items(response_json, author, ucid)
+    initial_data = YoutubeAPI.browse(continuation)
   else
-    url = "/channel/#{ucid}/playlists?flow=list&view=1"
+    params =
+      case sort_by
+      when "last", "last_added"
+        # Equivalent to "&sort=lad"
+        # {"2:string": "playlists", "3:varint": 4, "4:varint": 1, "6:varint": 1}
+        "EglwbGF5bGlzdHMYBCABMAE%3D"
+      when "oldest", "oldest_created"
+        # formerly "&sort=da"
+        # Not available anymore :c or maybe ??
+        # {"2:string": "playlists", "3:varint": 2, "4:varint": 1, "6:varint": 1}
+        "EglwbGF5bGlzdHMYAiABMAE%3D"
+        # {"2:string": "playlists", "3:varint": 1, "4:varint": 1, "6:varint": 1}
+        # "EglwbGF5bGlzdHMYASABMAE%3D"
+      when "newest", "newest_created"
+        # Formerly "&sort=dd"
+        # {"2:string": "playlists", "3:varint": 3, "4:varint": 1, "6:varint": 1}
+        "EglwbGF5bGlzdHMYAyABMAE%3D"
+      end
 
-    case sort_by
-    when "last", "last_added"
-      #
-    when "oldest", "oldest_created"
-      url += "&sort=da"
-    when "newest", "newest_created"
-      url += "&sort=dd"
-    else nil # Ignore
-    end
-
-    response = YT_POOL.client &.get(url)
-    initial_data = extract_initial_data(response.body)
-    return [] of SearchItem, nil if !initial_data
-
-    items, continuation = extract_items(initial_data, author, ucid)
+    initial_data = YoutubeAPI.browse(ucid, params: params || "")
   end
 
-  return items, continuation
+  return extract_items(initial_data, ucid, author)
 end
 
 # ## NOTE: DEPRECATED