refactor_answer.rb

class Gatekeeper
  attr_accessor :user, :contexts

  def initialize(user, contexts)
    self.user = user
    self.contexts = Array.wrap(contexts)
  end

  def self.access?(user: user, contexts: contexts)
    new(user, contexts).access?
  end

  def access?
    group_permission || user_permission
  end

  def group_permission
    GroupPermission.where(context_id: contexts, group_id: user.groups)
  end

  def user_permission
    UserPermission.where(context_id: contexts, user_id: user.id)
  end
end