module Labels class FindOrCreateService def initialize(current_user, parent, params = {}) @current_user = current_user @parent = parent @available_labels = params.delete(:available_labels) @params = params.dup.with_indifferent_access end def execute(skip_authorization: false) @skip_authorization = skip_authorization find_or_create_label end private attr_reader :current_user, :parent, :params, :skip_authorization def available_labels @available_labels ||= LabelsFinder.new( current_user, "#{parent_type}_id".to_sym => parent.id, only_group_labels: parent_is_group? ).execute(skip_authorization: skip_authorization) end # Only creates the label if current_user can do so, if the label does not exist # and the user can not create the label, nil is returned def find_or_create_label new_label = available_labels.find_by(title: title) if new_label.nil? && (skip_authorization || Ability.allowed?(current_user, :admin_label, parent)) new_label = Labels::CreateService.new(params).execute(parent_type.to_sym => parent) end new_label end def title params[:title] || params[:name] end def parent_type parent.model_name.param_key end def parent_is_group? parent_type == "group" end end end