concern.rb

module AlbumConcern
  private

  def set_album
    @album = Album.find(params[:id])
  end

  def filter_albums(albums)
    filter = params[:filter]
    return albums unless filter
    Albums::AlbumFiltersQuery.call(albums, params)
  end

  def album_params
    params.require(:album).permit(:title,
                                  :center_id,
                                  :description,
                                  event_list: [],
                                  tag_list: [],
                                  user_group_ids: []).merge(
                                    user_id: @current_user.id,
                                  )
  end

  def search_albums(albums, query)
    return albums unless query
    albums.search(query)
  end

  def find_user_group
    if album_params.key?("user_group_ids")
      user_group_ids = album_params["user_group_ids"]
      user_group_ids.each do |id|
        if UserGroup.find_by(id: id).nil?
          @album.errors.add(
            :user_group, "Couldn't find UserGroup with id #{id}"
          )
        end
      end
    end
  end
end