foodsoft/plugins/messages/app/controllers/messagegroups_controller.rb

class MessagegroupsController < ApplicationController
  def index
    @messagegroups = Messagegroup.order('name')
  end

  def join
    @messagegroup = Messagegroup.find(params[:id])
    @messagegroup.users << current_user
    redirect_to messagegroups_url, notice: I18n.t('messagegroups.join.notice')
  end

  def leave
    @messagegroup = Messagegroup.find(params[:id])
    @messagegroup.users.destroy(current_user)
    redirect_to messagegroups_url, notice: I18n.t('messagegroups.leave.notice')
  end
end