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card.go
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/
card.go
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package model
import (
"errors"
"fmt"
"strings"
)
// Card модель банковской карты приложения
type Card struct {
ID int `json:"id"`
Bank string `json:"bank"`
Number string `json:"number"`
Date string `json:"date"`
CVV string `json:"cvv"`
MetaInfo string `json:"metainfo"`
}
const (
maxCardNumberLegth = 19
maxCardCVVLegth = 3
)
var (
ErrCardBankEmpity = errors.New("bank empity")
ErrCardNumberEmpity = errors.New("number empity")
ErrCardLongNumber = fmt.Errorf("number length is more than %d characters", maxCardNumberLegth)
ErrCardDateEmpity = errors.New("date empity")
ErrCardCVVEmpity = errors.New("cvv empity")
ErrCardLongCVV = fmt.Errorf("cvv length is more than %d characters", maxCardCVVLegth)
ErrCardMetainfoEmpity = errors.New("metainfo empity")
)
// Validate проверяет корректность модели банковской карты приложения
func (r *Card) Validate() error {
if strings.TrimSpace(r.Bank) == "" {
return ErrCardBankEmpity
}
if strings.TrimSpace(r.Number) == "" {
return ErrCardNumberEmpity
}
if len(r.Number) > maxCardNumberLegth {
return ErrCardLongNumber
}
if strings.TrimSpace(r.Date) == "" {
return ErrCardDateEmpity
}
if strings.TrimSpace(r.CVV) == "" {
return ErrCardCVVEmpity
}
if len(r.CVV) > maxCardCVVLegth {
return ErrCardLongCVV
}
if strings.TrimSpace(r.MetaInfo) == "" {
return ErrCardMetainfoEmpity
}
return nil
}