paying an invoice

lib/charging/invoice.rb

@@ -34,7 +34,7 @@ def create!
 
       raise Http::LastResponseError.new(last_response) if last_response.code != 201
 
-      reload_attributes_after_create!
+      reload_attributes!(last_response.headers[:location])
     rescue ::RestClient::Exception => exception
       @last_response = exception.response
 
@@ -43,6 +43,27 @@ def create!
       @errors = [$ERROR_INFO.message] if $ERROR_INFO
     end
 
+    # Pays current invoice at API. You can pass <tt>paid_amount</tt>, 
+    # <tt>payment_date</tt> and <tt>note</tt> about payment. 
+    # Default values:
+    # - <tt>amount</tt>: amount
+    # - <tt>date</tt>:  Time.now.strftime('%Y-%m-%d')
+    def pay!(paid_amount = amount, payment_date = Time.now, note = false)
+      attributes = {
+        amount: paid_amount,
+        date: payment_date.strftime('%Y-%m-%d')
+      }
+      attributes[:note] = note if note
+
+      response = Http.post("/invoices/#{uuid}/pay/", domain.token, MultiJson.encode(attributes), etag: self.etag)
+
+      raise Http::LastResponseError.new(response) if response.code != 201
+
+      reload_attributes!(self.uri)
+    rescue ::RestClient::Exception => excetion
+      raise Http::LastResponseError.new(excetion.response)
+    end
+
     # Finds an invoice by uuid. It requites an <tt>domain</tt> and a
     # <tt>uuid</tt>.
     #
@@ -98,8 +119,8 @@ def self.load_persisted_invoice(attributes, response, domain, charge_account = n
 
     private
 
-    def reload_attributes_after_create!
-      response = Http.get(last_response.headers[:location], domain.token)
+    def reload_attributes!(uri)
+      response = Http.get(uri, domain.token)
 
       new_invoice = Invoice.load_persisted_invoice(MultiJson.decode(response.body), response, domain, charge_account)
 

spec/charging/invoice_spec.rb

@@ -167,7 +167,7 @@
 
       its(:uri) { should eq "http://sandbox.charging.financeconnect.com.br/invoices/#{uuid}/" }
       its(:uuid) { should eq uuid }
-      its(:etag) { should eq '"75de28a49a515edef88b3285921808a3d86ea5bf"' }
+      its(:etag) { should eq '"32a54d2e9e108dc5bb172eec680dfd7fdb0f57a8"' }
       its(:domain) { should eq domain }
     end
   end
@@ -203,4 +203,20 @@
       end
     end
   end
+
+  describe '#pay!' do
+    let!(:invoice) {
+      VCR.use_cassette('finding an invoice by uuid') do
+        described_class.find_by_uuid(domain, uuid)
+      end
+    }
+
+    it 'should update paid value' do
+      VCR.use_cassette('paying_an_invoice') do
+        invoice.pay!
+      end
+
+      expect(invoice.paid).to eq(invoice.amount)
+    end
+  end
 end