go/svc/invoice: import from code.hackerspace.pl/q3k/inboice
diff --git a/go/svc/invoice/render.go b/go/svc/invoice/render.go
new file mode 100644
index 0000000..47c6c6d
--- /dev/null
+++ b/go/svc/invoice/render.go
@@ -0,0 +1,127 @@
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "html/template"
+ "time"
+
+ wkhtml "github.com/sebastiaanklippert/go-wkhtmltopdf"
+
+ "code.hackerspace.pl/hscloud/go/svc/invoice/templates"
+ pb "code.hackerspace.pl/hscloud/proto/invoice"
+)
+
+var (
+ invTmpl *template.Template
+)
+
+func init() {
+ a, err := templates.Asset("invoice.html")
+ if err != nil {
+ panic(err)
+ }
+ invTmpl = template.Must(template.New("invoice.html").Parse(string(a)))
+}
+
+func renderInvoicePDF(i *pb.Invoice, number string, proforma bool) ([]byte, error) {
+ now := time.Now()
+
+ type item struct {
+ Title string
+ UnitPrice string
+ Qty string
+ VATRate string
+ TotalNet string
+ Total string
+ }
+
+ data := struct {
+ InvoiceNumber string
+ InvoicerBilling []string
+ InvoicerVAT string
+ InvoicerCompanyNumber string
+ InvoiceeBilling []string
+ InvoiceeVAT string
+ Date time.Time
+ DueDate time.Time
+ IBAN string
+ SWIFT string
+ Proforma bool
+ ReverseVAT bool
+ USCustomer bool
+ Items []item
+ TotalNet string
+ VATTotal string
+ Total string
+ DeliveryCharge string
+ }{
+ InvoiceNumber: number,
+ Date: now,
+ DueDate: now.AddDate(0, 0, int(i.DaysDue)),
+ IBAN: i.Iban,
+ SWIFT: i.Swift,
+ InvoicerVAT: i.InvoicerVatId,
+ InvoicerCompanyNumber: i.InvoicerCompanyNumber,
+ InvoiceeVAT: i.CustomerVatId,
+ Proforma: proforma,
+ ReverseVAT: i.ReverseVat,
+ USCustomer: i.UsCustomer,
+
+ InvoicerBilling: make([]string, len(i.InvoicerBilling)),
+ InvoiceeBilling: make([]string, len(i.CustomerBilling)),
+ }
+
+ unit := "€"
+
+ for d, s := range i.InvoicerBilling {
+ data.InvoicerBilling[d] = s
+ }
+ for d, s := range i.CustomerBilling {
+ data.InvoiceeBilling[d] = s
+ }
+
+ totalNet := 0
+ total := 0
+ for _, i := range i.Item {
+ rowTotalNet := int(i.UnitPrice * i.Count)
+ rowTotal := int(float64(rowTotalNet) * (float64(1) + float64(i.Vat)/100000))
+
+ totalNet += rowTotalNet
+ total += rowTotal
+ data.Items = append(data.Items, item{
+ Title: i.Title,
+ Qty: fmt.Sprintf("%d", i.Count),
+ UnitPrice: fmt.Sprintf(unit+"%.2f", float64(i.UnitPrice)/100),
+ VATRate: fmt.Sprintf("%.2f%%", float64(i.Vat)/1000),
+ TotalNet: fmt.Sprintf(unit+"%.2f", float64(rowTotalNet)/100),
+ Total: fmt.Sprintf(unit+"%.2f", float64(rowTotal)/100),
+ })
+ }
+
+ data.TotalNet = fmt.Sprintf(unit+"%.2f", float64(totalNet)/100)
+ data.VATTotal = fmt.Sprintf(unit+"%.2f", float64(total-totalNet)/100)
+ data.Total = fmt.Sprintf(unit+"%.2f", float64(total)/100)
+ data.DeliveryCharge = fmt.Sprintf(unit+"%.2f", float64(0))
+
+ var b bytes.Buffer
+ err := invTmpl.Execute(&b, &data)
+ if err != nil {
+ return []byte{}, err
+ }
+
+ pdfg, err := wkhtml.NewPDFGenerator()
+ if err != nil {
+ return []byte{}, err
+ }
+ pdfg.Dpi.Set(600)
+ pdfg.NoCollate.Set(false)
+ pdfg.PageSize.Set(wkhtml.PageSizeA4)
+
+ pdfg.AddPage(wkhtml.NewPageReader(&b))
+
+ if err := pdfg.Create(); err != nil {
+ return []byte{}, err
+ }
+ return pdfg.Bytes(), nil
+}