charge_app.rb

require 'pry'
require 'json'
require 'httparty'
require 'stripe'

class ChargeApp < Sinatra::Base
  AMOUNT = 300

  Stripe.api_key = "SECRET_STRIPE_KEY"

  post '/charge' do
    status = charge_customer(params[:stripeToken], params[:stripeEmail])
    add_email_to_spreadsheet(stripe_email) if status == 'succeeded'

    content_type :json
    { transaction_status: status }.to_json
  end

  get '/has-paid' do
    email = params['email']

    content_type :json
    { has_paid: check_if_email_in_spreadsheet(email) }.to_json
  end

  not_found do
    status 404
    '<h1 style="text-align: center;">404<br>No such page.<br><a href="copyfixes.com">copyfixes.com</a></h1>'
  end

  protected

    def charge_customer(token, customer_email)
      begin
        customer = create_customer(token, customer_email)
        payment = create_payment(customer.id)
      rescue Exception => e
      end

      payment.status
    end

    def create_customer(token, email)
      Stripe::Customer.create(source: token, description: "#{email}")
    end

    def create_payment(customer_id)
      Stripe::Charge.create(amount: AMOUNT, currency: 'usd', customer: customer_id)
    end

    def add_email_to_spreadsheet(email)
      HTTParty.post(
        'https://sheetsu.com/apis/v1.0/c12aec61',
        body: { email: email }.to_json,
        headers: { 'Content-Type' => 'application/json', 'Accept' => 'application/json'}
      ).body
    end

    def check_if_email_in_spreadsheet(email)
      response = HTTParty.get("https://sheetsu.com/apis/v1.0/c12aec61/search?email=m@sheetsu.com")
      response.is_a?(Array) && response.first['email'] == email
    end

end