83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package orders
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import (
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"crypto/rand"
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"encoding/hex"
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"errors"
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"fmt"
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"log"
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"net/http"
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"piekarnikgosipl/data"
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"strconv"
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"strings"
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)
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type listItem struct {
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id string
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count int // count multiplied by 10 to allow for half item purchases
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}
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type order struct {
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id string
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name string
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phone string
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items []listItem
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}
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func newOrderID() string {
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b := make([]byte, 8)
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rand.Read(b)
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return hex.EncodeToString(b)
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}
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func parseOrder(r *http.Request) (order, error) {
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var o order
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var err error
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var errorList []error
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o.name = strings.TrimSpace(r.PostFormValue("name"))
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if !validName(o.name) {
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errorList = append(errorList, fmt.Errorf("Podaj imię i nazwisko"))
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}
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o.phone, err = parsePhone(r.PostFormValue("phone"))
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if err != nil {
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errorList = append(errorList, err)
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}
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total := 0
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for _, item := range data.Swieta {
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count, err := parseFloat(r.PostFormValue(item.Id))
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if err != nil {
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errorList = append(errorList, fmt.Errorf("Nieprawidłowa ilość dla: %v", item.Name))
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continue
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}
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if count%10 == 5 && !item.Halveable {
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errorList = append(errorList, fmt.Errorf("Produktu %v nie można zamówić w ułamkowej ilości", item.Name))
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continue
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}
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o.items = append(o.items, listItem{item.Id, count})
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price, err := strconv.Atoi(item.Price)
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if err != nil {
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continue
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}
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total += count * price
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}
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if total < 500 {
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errorList = append(errorList, fmt.Errorf("Minimalna wartość zamówienia wynosi 50zł"))
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}
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o.id = newOrderID()
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return o, errors.Join(errorList...)
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}
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func OrderHandler(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, 16<<10)
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if err := r.ParseForm(); err != nil {
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writeErrors(w, r, http.StatusRequestEntityTooLarge, "Formularz jest nieprawidłowy.")
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return
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}
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o, err := parseOrder(r)
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if err != nil {
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log.Println("ORDER_INVALID", o, err)
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writeErrors(w, r, http.StatusUnprocessableEntity, errorMessages(err)...)
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return
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}
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startCheckout(w, r, o)
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}
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