Donation controller and payment model that accepts one time or recurring donations through Stripe.

donation_controller.rb

class DonationsController < ApplicationController
  def create
    @customer = Customer.find_or_create_by_email(params[:stripeEmail], params[:stripeToken], params[:stripeName])
    new_payment
    if @payment.save && @payment.charge
      @payment.delay_until(1.minutes.from_now).email_payer
      redirect_to page_path('thanks')
    end
    rescue Stripe::CardError => e
      flash[:error] = e.message
      redirect_to donations_errors_path
  end

  private

  def new_payment
    @payment = Payment.new(
      email: params[:stripeEmail],
      amount: params[:amount],
      currency: 'usd',
      customer: @customer,
      description: params[:description],
      monthly_donation: params[:monthlyDonation],
      donation_form_id: params[:donationID],
      uuid: SecureRandom.uuid
    )
  end
end

payment.rb

class Payment < ActiveRecord::Base
  belongs_to :customer

  def to_param
    uuid
  end

  def charge
    if monthly_donation
      charge_monthly
    else
      charge_one_time
    end
  end

  def email_payer
    PaymentMailer.payment_receipt(self).deliver
  end

  protected

  def charge_monthly
    stripe_plan = Stripe::Plan.create(
      :amount       => self.amount.to_i * 100,
      :interval     => 'month',
      :name         => 'Online Monthly Donation' + ' - ' + self.customer.email,
      :currency     => 'usd',
      :id           => SecureRandom.hex,
      :metadata     => {
        'plan_description'    => self.description,
        'donation_form_id'       => self.donation_form_id,
      }
    )
    self.update_attributes(is_charged: true, stripe_plan_id: stripe_plan.id)
    customer.stripe_customer.subscriptions.create(
      :plan => stripe_plan.id
    )
    return true
  end

  def charge_one_time
    begin
      charge = Stripe::Charge.create(
        :customer    => self.customer.stripe_customer_id,
        :amount      => self.amount.to_i * 100,
        :description => self.description,
        :currency    => 'usd',
        :metadata    => {
          'donation_form_id'       => self.donation_form_id,
          'frequency_type'        => 'one_time',
          'uuid'                  => self.uuid
        }
      )
      self.update_attributes(is_charged: true, stripe_charge_id: charge.id)
      return true
    end
  end
end