67 lines
2.3 KiB
Go
67 lines
2.3 KiB
Go
package validator
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import (
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"errors"
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"strings"
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"unicode/utf8"
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"apskel-pos-be/internal/constants"
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"apskel-pos-be/internal/contract"
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)
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// walletAdjustmentReasonLimit is the size of wallet_transactions.reason.
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const walletAdjustmentReasonLimit = 255
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// walletCashOutWords are reasons that describe turning balance into money. EnakPoint
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// and EnakCoin can never be cashed out, and an adjustment must not be used to record
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// that it happened (docs/prd-point-coin.md K7). Words like "tunai" are left out on
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// purpose: "paid in cash but the points never arrived" is a legitimate reason.
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var walletCashOutWords = []string{"pencairan", "cairkan", "cash out", "cashout", "withdraw"}
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type WalletValidator interface {
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ValidateAdjustRequest(req *contract.AdjustCustomerWalletRequest) (error, string)
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}
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type WalletValidatorImpl struct{}
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func NewWalletValidator() *WalletValidatorImpl {
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return &WalletValidatorImpl{}
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}
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func (v *WalletValidatorImpl) ValidateAdjustRequest(req *contract.AdjustCustomerWalletRequest) (error, string) {
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if req == nil {
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return errors.New("request body is required"), constants.MissingFieldErrorCode
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}
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req.Currency = strings.ToUpper(strings.TrimSpace(req.Currency))
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if req.Currency == "" {
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return errors.New("currency is required"), constants.MissingFieldErrorCode
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}
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if !constants.IsValidWalletCurrency(req.Currency) {
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return errors.New("currency must be POINT or COIN"), constants.MalformedFieldErrorCode
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}
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if req.Amount == 0 {
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return errors.New("amount must not be zero: use a positive amount to add and a negative one to take away"), constants.ValidationErrorCode
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}
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req.Reason = strings.TrimSpace(req.Reason)
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if req.Reason == "" {
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return errors.New("reason is required"), constants.MissingFieldErrorCode
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}
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if utf8.RuneCountInString(req.Reason) > walletAdjustmentReasonLimit {
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return errors.New("reason must be at most 255 characters"), constants.MalformedFieldErrorCode
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}
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lower := strings.ToLower(req.Reason)
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for _, word := range walletCashOutWords {
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if strings.Contains(lower, word) {
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return errors.New("EnakPoint and EnakCoin cannot be cashed out, so an adjustment cannot be for a cash-out"), constants.ValidationErrorCode
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}
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}
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if len(req.IdempotencyKey) > 50 {
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return errors.New("idempotency_key must be at most 50 characters"), constants.MalformedFieldErrorCode
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}
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return nil, ""
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}
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