bgpwtf/invoice/calc.go

package main

import (
	"time"

	pb "code.hackerspace.pl/hscloud/bgpwtf/invoice/proto"
)

func calculateInvoiceData(p *pb.Invoice) {
	p.Unit = p.Data.Unit
	if p.Unit == "" {
		p.Unit = "€"
	}

	p.TotalNet = 0
	p.Total = 0
	for _, i := range p.Data.Item {
		rowTotalNet := uint64(i.UnitPrice * i.Count)
		rowTotal := uint64(float64(rowTotalNet) * (float64(1) + float64(i.Vat)/100000))

		p.TotalNet += rowTotalNet
		p.Total += rowTotal
		i.TotalNet = rowTotalNet
		i.Total = rowTotal
	}

	due := int64(time.Hour*24) * p.Data.DaysDue
	p.DueDate = time.Unix(0, p.Date).Add(time.Duration(due)).UnixNano()
}