67 lines
2.4 KiB
Go
67 lines
2.4 KiB
Go
 
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package service
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import (
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"context"
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"errors"
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"github.com/google/uuid"
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"apskel-pos-be/internal/constants"
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"apskel-pos-be/internal/contract"
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"apskel-pos-be/internal/models"
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"apskel-pos-be/internal/processor"
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"apskel-pos-be/internal/repository"
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)
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// CustomerWalletService moves balance on the customer's own request: exchanging
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// EnakCoin into EnakPoint (docs/prd-point-coin.md F4).
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type CustomerWalletService interface {
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PreviewExchange(ctx context.Context, customerID uuid.UUID, coins int64) *contract.Response
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Exchange(ctx context.Context, customerID uuid.UUID, req *contract.ExchangeCoinsRequest, idempotencyKey string, info models.CustomerPinRequestInfo) *contract.Response
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}
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type CustomerWalletServiceImpl struct {
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exchanges *processor.WalletExchangeProcessor
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}
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func NewCustomerWalletService(exchanges *processor.WalletExchangeProcessor) *CustomerWalletServiceImpl {
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return &CustomerWalletServiceImpl{exchanges: exchanges}
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}
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func (s *CustomerWalletServiceImpl) PreviewExchange(ctx context.Context, customerID uuid.UUID, coins int64) *contract.Response {
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preview, err := s.exchanges.Preview(ctx, customerID, coins)
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if err != nil {
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return walletMoveErrorResponse(err)
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}
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return contract.BuildSuccessResponse(preview)
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}
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func (s *CustomerWalletServiceImpl) Exchange(ctx context.Context, customerID uuid.UUID, req *contract.ExchangeCoinsRequest, idempotencyKey string, info models.CustomerPinRequestInfo) *contract.Response {
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result, err := s.exchanges.Exchange(ctx, customerID, req.Coins, req.Pin, idempotencyKey, info)
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if err != nil {
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return walletMoveErrorResponse(err)
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}
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return contract.BuildSuccessResponse(result)
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}
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// walletMoveErrorResponse keeps the PIN codes the apps act on, and tells a refused
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// request apart from a server failure.
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func walletMoveErrorResponse(err error) *contract.Response {
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var pinErr *processor.PinError
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if errors.As(err, &pinErr) {
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return PinErrorResponse(err)
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}
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code := constants.InternalServerErrorCode
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switch {
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case errors.Is(err, repository.ErrWalletNotFound):
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code = constants.NotFoundErrorCode
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case errors.Is(err, processor.ErrWalletMoveRejected),
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errors.Is(err, processor.ErrWalletIdempotencyConflict),
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errors.Is(err, processor.ErrWalletInvalidEntry):
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code = constants.ValidationErrorCode
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}
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return contract.BuildErrorResponse([]*contract.ResponseError{
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contract.NewResponseError(code, constants.WalletServiceEntity, err.Error()),
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})
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}
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