stripe webhook processing

striper-subscription.rb

class Striper::SubscriptionCanceledEvent < Striper
  def process
    return unless user && log
    clear_customer_roles(user)
    UserMailer.unsubscribe_email(user).deliver
  end
end

striper.rb

class Striper
  attr_reader :event, :user, :log, :plan
  def initialize(event, user=nil, plan=nil)
    @event = event
    if (user && plan)
      @user = user
      @plan = plan
      @log = StripeEventLog.new
    else
      @log = create_log(event)
      @user = get_user
    end
  end

  def get_user
    cust_id = @event.data.object.customer
    subscription = Subscription.where(stripe_id:cust_id).first
    if subscription
      subscription.user
    else
      nil
    end
  end

  def get_role(plan_name)
    Ability.find_role_by_plan_name(plan_name)
  end

  def get_plan(event)
    return @plan.name if @plan
    return event.data.object.lines.data[0].plan.name
  end

  def create_log(event)
    r = StripeEventLog.new
    r.stripe_id = event.id
    r.stripe_type = event.type
    return r.save
  end

  def existing_customer_roles?(user)
    [:bronze, :silver, :gold].each do |r|
      return true if user.has_role? r
    end
    return false
  end

  def clear_customer_roles(user)
    [:bronze, :silver, :gold].each do |r|
      user.remove_role r
    end
  end

end