delegate removal from favorites and updating of user fav counts to delayed job

app/models/post.rb

@@ -815,19 +815,19 @@ class Post < ApplicationRecord
 
         when /^-favgroup:(\d+)$/i
           favgroup = FavoriteGroup.where("id = ?", $1.to_i).for_creator(CurrentUser.user.id).first
-          favgroup.remove!(self) if favgroup
+          favgroup.remove!(id) if favgroup
 
         when /^-favgroup:(.+)$/i
           favgroup = FavoriteGroup.named($1).for_creator(CurrentUser.user.id).first
-          favgroup.remove!(self) if favgroup
+          favgroup.remove!(id) if favgroup
 
         when /^favgroup:(\d+)$/i
           favgroup = FavoriteGroup.where("id = ?", $1.to_i).for_creator(CurrentUser.user.id).first
-          favgroup.add!(self) if favgroup
+          favgroup.add!(id) if favgroup
 
         when /^favgroup:(.+)$/i
           favgroup = FavoriteGroup.named($1).for_creator(CurrentUser.user.id).first
-          favgroup.add!(self) if favgroup
+          favgroup.add!(id) if favgroup
         end
       end
     end
@@ -1038,15 +1038,12 @@ class Post < ApplicationRecord
     end
 
     def remove_from_favorites
-      favorites.find_each do |fav|
-        remove_favorite!(fav.user)
-      end
+      Favorite.delay.purge_post(id, fav_string.scan(/\d+/))
+      PostVote.where(post_id: id).delete_all
     end
 
     def remove_from_fav_groups
-      FavoriteGroup.for_post(id).find_each do |group|
-        group.remove!(self)
-      end
+      FavoriteGroup.delay.purge_post(id)
     end
   end
 
@@ -1382,7 +1379,6 @@ class Post < ApplicationRecord
       transaction do
         Post.without_timeout do
           ModAction.log("permanently deleted post ##{id}")
-          #delete!("Permanently deleted post ##{id}", :without_mod_action => true)
 
           give_favorites_to_parent
           update_children_on_destroy