Adds confirm_payment endpoint for manual confirmation (#50)

* Adds confirm payment endpoint.

* Adds return_url param

* Adds confirm params.

* Don't double confirm.

* Explicitly pass whether to confirm instead of inferring from return_url

Author: csabol-stripe

web.rb

@@ -55,6 +55,7 @@ def log_info(message)
       payload[:metadata],
       'usd',
       payload[:shipping],
+      payload[:return_url],
     )
   rescue Stripe::StripeError => e
     status 402
@@ -65,6 +66,23 @@ def log_info(message)
   return payment_intent.to_json
 end
 
+post '/confirm_payment' do
+    authenticate!
+    payload = params
+    if request.content_type.include? 'application/json' and params.empty?
+        payload = Sinatra::IndifferentHash[JSON.parse(request.body.read)]
+    end
+    begin
+        payment_intent = Stripe::PaymentIntent.confirm(payload[:payment_intent_id])
+        rescue Stripe::StripeError => e
+        status 402
+        return log_info("Error: #{e.message}")
+    end
+
+    status 200
+    return payment_intent.to_json
+end
+
 def authenticate!
   # This code simulates "loading the Stripe customer for your current session".
   # Your own logic will likely look very different.
@@ -104,6 +122,7 @@ def authenticate!
       nil,
       params[:metadata],
       params[:currency],
+      nil,
       nil
     )
   rescue Stripe::StripeError => e
@@ -141,6 +160,7 @@ def authenticate!
         source.metadata["customer"],
         source.metadata,
         source.currency,
+        nil,
         nil
       )
     rescue Stripe::StripeError => e
@@ -156,7 +176,7 @@ def authenticate!
 end
 
 def create_payment_intent(amount, source_id, payment_method_id, customer_id = nil,
-                          metadata = {}, currency = 'usd', shipping = nil)
+                          metadata = {}, currency = 'usd', shipping = nil, return_url = nil, confirm = false)
   return Stripe::PaymentIntent.create(
     :amount => amount,
     :currency => currency || 'usd',
@@ -166,15 +186,18 @@ def create_payment_intent(amount, source_id, payment_method_id, customer_id = ni
     :payment_method_types => ['card'],
     :description => "Example PaymentIntent",
     :shipping => shipping,
+    :return_url => return_url,
+    :confirm => confirm,
+    :confirmation_method => confirm ? "manual" : "automatic",
     :metadata => {
       :order_id => '5278735C-1F40-407D-933A-286E463E72D8',
     }.merge(metadata || {}),
   )
 end
 
 def create_and_capture_payment_intent(amount, source_id, payment_method_id, customer_id = nil,
-                                      metadata = {}, currency = 'usd', shipping = nil)
+                                      metadata = {}, currency = 'usd', shipping = nil, return_url = nil)
   payment_intent = create_payment_intent(amount, source_id, payment_method_id, customer_id,
-                                          metadata, currency, shipping)
-  return payment_intent.confirm()
-end
+                                          metadata, currency, shipping, return_url, true)
+  return payment_intent
+end