catch stripe webhook, send confirmation

app.rb

@@ -708,8 +708,25 @@ post '/contact' do
 end
 
 post '/stripe_webhook' do
-  event_json = JSON.parse(request.body.read)
-  puts event_json.inspect
+  event = JSON.parse request.body.read
+  if event['type'] == 'customer.created'
+    username  = event['data']['object']['description']
+    email     = event['data']['object']['email']
+    plan_name = event['data']['object']['subscriptions']['object']['data'].first['plan']['name']
+
+    site = Site[username: username]
+    halt 200, 'ok' if site.nil?
+
+    EmailWorker.perform_async({
+      from: 'web@neocities.org',
+      reply_to: site.email,
+      to: 'contact@neocities.org',
+      subject: "[NeoCities] You've become a supporter!",
+      body: Tilt.new('./views/templates/email_subscription.erb', pretty: true).render(self)
+    })
+  end
+
+  'ok'
 end
 
 post '/api/upload' do