implement service

app/controllers/discourse_donations/charges_controller.rb

@@ -10,20 +10,8 @@ module DiscourseDonations
       if email.nil? || email.empty?
         response = {}
       else
-        Stripe.api_key = SiteSetting.discourse_donations_secret_key
-        currency = SiteSetting.discourse_donations_currency
-
-        customer = Stripe::Customer.create(
-         :email => email,
-         :source  => params[:stripeToken]
-        )
-
-        response = Stripe::Charge.create(
-          :customer    => customer.id,
-          :amount      => params[:amount],
-          :description => SiteSetting.discourse_donations_description,
-          :currency    => currency
-        )
+        payment = DiscourseDonations::Stripe.new(secret_key, stripe_options)
+        response = payment.charge(email, params)
       end
 
       render :json => response
@@ -31,6 +19,17 @@ module DiscourseDonations
 
     private
 
+    def secret_key
+      SiteSetting.discourse_donations_secret_key
+    end
+
+    def stripe_options
+      {
+        description: SiteSetting.discourse_donations_description,
+        currency: SiteSetting.discourse_donations_currency
+      }
+    end
+
     def email
       params[:email] || current_user.try(:email)
     end

spec/controllers/discourse_donations/charges_controller_spec.rb

@@ -7,6 +7,8 @@ module DiscourseDonations
 
     before do
       SiteSetting.stubs(:discourse_donations_secret_key).returns('secret-key-yo')
+      SiteSetting.stubs(:discourse_donations_description).returns('charity begins at discourse plugin')
+      SiteSetting.stubs(:discourse_donations_currency).returns('AUD')
     end
 
     it 'responds ok for anonymous users' do