camper/pkg/database/NewInvoiceProduct.go

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package database
import (
"fmt"
"github.com/jackc/pgio"
"github.com/jackc/pgtype"
)
const NewInvoiceProductTypeName = "new_invoice_product"
type NewInvoiceProduct struct {
ProductId int
Name string
Description string
Price string
Quantity int
Discount float64
Taxes []int
}
func (src NewInvoiceProduct) EncodeBinary(ci *pgtype.ConnInfo, dst []byte) ([]byte, error) {
typeName := NewInvoiceProductTypeName
dt, ok := ci.DataTypeForName(typeName)
if !ok {
return nil, fmt.Errorf("unable to find oid for type name %v", typeName)
}
var productId interface{}
if src.ProductId > 0 {
productId = src.ProductId
}
values := []interface{}{
productId,
src.Name,
src.Description,
src.Price,
src.Quantity,
src.Discount,
src.Taxes,
}
ct := pgtype.NewValue(dt.Value).(*pgtype.CompositeType)
if err := ct.Set(values); err != nil {
return nil, err
}
return ct.EncodeBinary(ci, dst)
}
type NewInvoiceProductArray []*NewInvoiceProduct
func (src NewInvoiceProductArray) EncodeBinary(ci *pgtype.ConnInfo, buf []byte) ([]byte, error) {
typeName := NewInvoiceProductTypeName
dt, ok := ci.DataTypeForName(typeName)
if !ok {
return nil, fmt.Errorf("unable to find oid for type name %v", typeName)
}
arrayHeader := pgtype.ArrayHeader{
ElementOID: int32(dt.OID),
Dimensions: []pgtype.ArrayDimension{{Length: int32(len(src)), LowerBound: 1}},
}
buf = arrayHeader.EncodeBinary(ci, buf)
for _, product := range src {
sp := len(buf)
buf = pgio.AppendInt32(buf, -1)
elemBuf, err := product.EncodeBinary(ci, buf)
if err != nil {
return nil, err
}
if elemBuf != nil {
buf = elemBuf
pgio.SetInt32(buf[sp:], int32(len(buf[sp:])-4))
}
}
return buf, nil
}