Add GetCSV and GetPDF methods to InvoiceService (#305)

* Add GetCSV and GetPDF methods to InvoiceService

Co-authored-by: Zach Gershman <zachgersh@users.noreply.github.com>

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## unreleased
 
+- #305 invoices: GetPDF and GetCSV methods - @rbutler
 - #301 invoices: Get, Summary, and List methods - @rbutler
 
 ## [v1.30.0] - 2020-02-03

invoices.go

@@ -1,6 +1,7 @@
 package godo
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"net/http"
@@ -14,6 +15,8 @@ const invoicesBasePath = "v2/customers/my/invoices"
 // See: https://developers.digitalocean.com/documentation/v2/#invoices
 type InvoicesService interface {
 	Get(context.Context, string, *ListOptions) (*Invoice, *Response, error)
+	GetPDF(context.Context, string) ([]byte, *Response, error)
+	GetCSV(context.Context, string) ([]byte, *Response, error)
 	List(context.Context, *ListOptions) (*InvoiceList, *Response, error)
 	GetSummary(context.Context, string) (*InvoiceSummary, *Response, error)
 }
@@ -184,3 +187,39 @@ func (s *InvoicesServiceOp) GetSummary(ctx context.Context, invoiceUUID string)
 
 	return root, resp, err
 }
+
+// Get the pdf for an Invoice
+func (s *InvoicesServiceOp) GetPDF(ctx context.Context, invoiceUUID string) ([]byte, *Response, error) {
+	path := fmt.Sprintf("%s/%s/pdf", invoicesBasePath, invoiceUUID)
+
+	req, err := s.client.NewRequest(ctx, http.MethodGet, path, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var root bytes.Buffer
+	resp, err := s.client.Do(ctx, req, &root)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return root.Bytes(), resp, err
+}
+
+// Get the csv for an Invoice
+func (s *InvoicesServiceOp) GetCSV(ctx context.Context, invoiceUUID string) ([]byte, *Response, error) {
+	path := fmt.Sprintf("%s/%s/csv", invoicesBasePath, invoiceUUID)
+
+	req, err := s.client.NewRequest(ctx, http.MethodGet, path, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var root bytes.Buffer
+	resp, err := s.client.Do(ctx, req, &root)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return root.Bytes(), resp, err
+}

invoices_test.go

@@ -1,6 +1,7 @@
 package godo
 
 import (
+	"bytes"
 	"fmt"
 	"net/http"
 	"reflect"
@@ -269,3 +270,43 @@ func TestInvoices_GetSummary(t *testing.T) {
 		t.Errorf("Invoices.GetSummary\nInvoiceSummary: got=%#v\nwant=%#v", invoiceSummaryResponse, &expectedSummary)
 	}
 }
+
+func TestInvoices_GetPDF(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/v2/customers/my/invoices/example-invoice-uuid/pdf", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+		fmt.Fprint(w, `some pdf content`)
+	})
+
+	invoicePDFResponse, _, err := client.Invoices.GetPDF(ctx, "example-invoice-uuid")
+	if err != nil {
+		t.Errorf("Invoices.GetPDF returned error: %v", err)
+	}
+
+	expected := []byte("some pdf content")
+	if !bytes.Equal(invoicePDFResponse, expected) {
+		t.Errorf("Invoices.GetPDF\n got=%#v\nwant=%#v", invoicePDFResponse, expected)
+	}
+}
+
+func TestInvoices_GetCSV(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/v2/customers/my/invoices/example-invoice-uuid/csv", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+		fmt.Fprint(w, `some csv content`)
+	})
+
+	invoiceCSVResponse, _, err := client.Invoices.GetCSV(ctx, "example-invoice-uuid")
+	if err != nil {
+		t.Errorf("Invoices.GetCSV returned error: %v", err)
+	}
+
+	expected := []byte("some csv content")
+	if !bytes.Equal(invoiceCSVResponse, expected) {
+		t.Errorf("Invoices.GetCSV\n got=%#v\nwant=%#v", invoiceCSVResponse, expected)
+	}
+}