mirror of
https://github.com/3ybactuk/marketplace-go-service-project.git
synced 2025-10-31 06:23:44 +03:00
282 lines
7.4 KiB
Go
282 lines
7.4 KiB
Go
package service
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import (
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"context"
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"fmt"
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"slices"
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"route256/loms/internal/domain/entity"
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"route256/loms/internal/domain/model"
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"route256/loms/internal/infra/tracing"
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pb "route256/pkg/api/loms/v1"
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"github.com/rs/zerolog/log"
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)
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//go:generate minimock -i OrderRepository -o ./mock -s _mock.go
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type OrderRepository interface {
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OrderCreate(ctx context.Context, order *entity.Order) (entity.ID, error)
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OrderSetStatus(ctx context.Context, orderID entity.ID, newStatus string) error
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OrderGetByID(ctx context.Context, orderID entity.ID) (*entity.Order, error)
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}
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//go:generate minimock -i StockRepository -o ./mock -s _mock.go
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type StockRepository interface {
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StockReserve(ctx context.Context, stock *entity.Stock) error
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StockReserveRemove(ctx context.Context, stock *entity.Stock) error
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StockCancel(ctx context.Context, stock *entity.Stock) error
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StockGetByID(ctx context.Context, sku entity.Sku) (*entity.Stock, error)
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}
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type txManager interface {
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WriteWithTransaction(ctx context.Context, fn func(ctx context.Context) error) (err error)
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ReadWithTransaction(ctx context.Context, fn func(ctx context.Context) error) (err error)
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WriteWithRepeatableRead(ctx context.Context, fn func(ctx context.Context) error) (err error)
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ReadWithRepeatableRead(ctx context.Context, fn func(ctx context.Context) error) (err error)
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}
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type StatusProducer interface {
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Send(ctx context.Context, id entity.ID, status string) error
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}
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type LomsService struct {
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orders OrderRepository
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stocks StockRepository
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txManager txManager
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statusProducer StatusProducer
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}
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func NewLomsService(orderRepo OrderRepository, stockRepo StockRepository, txManager txManager, statusProducer StatusProducer) *LomsService {
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return &LomsService{
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orders: orderRepo,
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stocks: stockRepo,
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txManager: txManager,
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statusProducer: statusProducer,
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}
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}
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func (s *LomsService) rollbackStocks(ctx context.Context, stocks []*entity.Stock) {
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ctx, span := tracing.Tracer().Start(ctx, "rollbackStocks")
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defer span.End()
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for _, stock := range stocks {
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if err := s.stocks.StockCancel(ctx, stock); err != nil {
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log.Error().Err(err).Msg("failed to rollback stock")
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}
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}
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}
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// Wraps writing status to DB and status topic.
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// Should use this function for status updates.
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// Guarantees that status upd event will be sent only if DB write is successful.
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func (s *LomsService) setStatus(ctx context.Context, id entity.ID, status string) error {
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log.Trace().Msgf("running status update for %d with status %s", id, status)
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if err := s.orders.OrderSetStatus(ctx, id, status); err != nil {
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return fmt.Errorf("orders.OrderSetStatus: %w", err)
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}
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if err := s.statusProducer.Send(ctx, id, status); err != nil {
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log.Error().Err(err).Msg("statusProducer.Send")
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}
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return nil
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}
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func (s *LomsService) createInitial(ctx context.Context, orderReq *pb.OrderCreateRequest) (*entity.Order, error) {
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order := &entity.Order{
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OrderID: 0,
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Status: pb.OrderStatus_ORDER_STATUS_NEW.String(),
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UserID: entity.ID(orderReq.UserId),
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Items: make([]entity.OrderItem, len(orderReq.Items)),
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}
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for i, item := range orderReq.Items {
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order.Items[i] = entity.OrderItem{
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ID: entity.Sku(item.Sku),
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Count: item.Count,
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}
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}
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slices.SortStableFunc(order.Items, func(a, b entity.OrderItem) int {
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return int(a.ID - b.ID)
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})
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err := s.txManager.WriteWithTransaction(ctx, func(txCtx context.Context) error {
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id, err := s.orders.OrderCreate(txCtx, order)
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if err != nil {
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return err
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}
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order.OrderID = id
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return nil
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})
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if err != nil {
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return nil, err
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}
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return order, nil
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}
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func (s *LomsService) OrderCreate(ctx context.Context, orderReq *pb.OrderCreateRequest) (entity.ID, error) {
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ctx, span := tracing.Tracer().Start(ctx, "OrderCreate")
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defer span.End()
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if orderReq == nil || orderReq.UserId <= 0 || len(orderReq.Items) == 0 {
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return 0, model.ErrInvalidInput
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}
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for _, item := range orderReq.Items {
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if item.Sku <= 0 || item.Count == 0 {
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return 0, model.ErrInvalidInput
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}
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}
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order, err := s.createInitial(ctx, orderReq)
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if err != nil {
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return 0, err
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}
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if statErr := s.setStatus(ctx, order.OrderID, order.Status); statErr != nil {
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return 0, statErr
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}
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var resErr error
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err = s.txManager.WriteWithTransaction(ctx, func(txCtx context.Context) error {
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committed := make([]*entity.Stock, 0, len(order.Items))
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for _, it := range order.Items {
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st := &entity.Stock{Item: it, Reserved: it.Count}
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if resErr = s.stocks.StockReserve(txCtx, st); resErr != nil {
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s.rollbackStocks(txCtx, committed)
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resErr = fmt.Errorf("stocks.StockReserve: %w", resErr)
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return nil
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}
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committed = append(committed, st)
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}
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return nil
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})
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finalStatus := pb.OrderStatus_ORDER_STATUS_AWAITING_PAYMENT.String()
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defer func() {
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if statErr := s.setStatus(ctx, order.OrderID, finalStatus); statErr != nil {
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log.Error().Err(statErr).Msgf("failed to setStatus to %s", finalStatus)
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}
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}()
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if err != nil {
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finalStatus = pb.OrderStatus_ORDER_STATUS_FAILED.String()
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return 0, err
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}
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if resErr != nil {
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finalStatus = pb.OrderStatus_ORDER_STATUS_FAILED.String()
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return 0, resErr
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}
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return order.OrderID, nil
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}
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func (s *LomsService) OrderInfo(ctx context.Context, orderID entity.ID) (*entity.Order, error) {
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ctx, span := tracing.Tracer().Start(ctx, "OrderInfo")
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defer span.End()
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if orderID <= 0 {
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return nil, model.ErrInvalidInput
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}
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return s.orders.OrderGetByID(ctx, orderID)
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}
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func (s *LomsService) OrderPay(ctx context.Context, orderID entity.ID) error {
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ctx, span := tracing.Tracer().Start(ctx, "OrderPay")
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defer span.End()
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if orderID <= 0 {
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return model.ErrInvalidInput
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}
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return s.txManager.WriteWithTransaction(ctx, func(txCtx context.Context) error {
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order, err := s.orders.OrderGetByID(txCtx, orderID)
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if err != nil {
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return err
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}
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switch order.Status {
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case pb.OrderStatus_ORDER_STATUS_PAYED.String():
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return nil
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case pb.OrderStatus_ORDER_STATUS_AWAITING_PAYMENT.String():
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for _, it := range order.Items {
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if err := s.stocks.StockReserveRemove(txCtx, &entity.Stock{
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Item: it,
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Reserved: it.Count,
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}); err != nil {
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log.Error().Err(err).Msg("failed to free stock reservation")
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}
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}
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return s.setStatus(txCtx, orderID,
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pb.OrderStatus_ORDER_STATUS_PAYED.String())
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default:
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return model.ErrOrderInvalidStatus
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}
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})
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}
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func (s *LomsService) OrderCancel(ctx context.Context, orderID entity.ID) error {
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ctx, span := tracing.Tracer().Start(ctx, "OrderCancel")
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defer span.End()
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if orderID <= 0 {
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return model.ErrInvalidInput
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}
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return s.txManager.WriteWithTransaction(ctx, func(txCtx context.Context) error {
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order, err := s.orders.OrderGetByID(txCtx, orderID)
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if err != nil {
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return err
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}
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switch order.Status {
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case pb.OrderStatus_ORDER_STATUS_CANCELLED.String():
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return nil
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case pb.OrderStatus_ORDER_STATUS_FAILED.String(),
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pb.OrderStatus_ORDER_STATUS_PAYED.String():
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return model.ErrOrderInvalidStatus
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}
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for _, it := range order.Items {
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if err := s.stocks.StockCancel(txCtx, &entity.Stock{
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Item: it,
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Reserved: it.Count,
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}); err != nil {
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return err
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}
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}
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return s.setStatus(txCtx, orderID,
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pb.OrderStatus_ORDER_STATUS_CANCELLED.String())
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})
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}
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func (s *LomsService) StocksInfo(ctx context.Context, sku entity.Sku) (uint32, error) {
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ctx, span := tracing.Tracer().Start(ctx, "StocksInfo")
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defer span.End()
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if sku <= 0 {
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return 0, model.ErrInvalidInput
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}
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stock, err := s.stocks.StockGetByID(ctx, sku)
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if err != nil {
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return 0, err
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}
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return stock.Item.Count - stock.Reserved, nil
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}
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