forked from ebhomengo/niki
97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package service
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import (
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"context"
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richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
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"git.gocasts.ir/ebhomengo/niki/types"
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"time"
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)
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type Repository interface {
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AddItem(ctx context.Context, userID types.ID, cart CartItem) error
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GetCart(ctx context.Context, userID types.ID) (Cart, error)
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DeleteItem(ctx context.Context, userID, productID types.ID) error
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UpdateQuantity(ctx context.Context, userID, productID types.ID, quantity int) error
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DeleteCart(ctx context.Context, userID types.ID) error
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}
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type Service struct {
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validate Validate
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repo Repository
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}
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func New(val Validate, repo Repository) Service {
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return Service{validate: val, repo: repo}
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}
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func (s Service) AddToBasket(ctx context.Context, req AddToCartRequest) error {
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const op = "shoppingbasketapp.service.AddToBasket"
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if err := s.validate.ValidateAddToCart(req); err != nil {
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return err
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}
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return s.repo.AddItem(ctx, req.UserID, CartItem{
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ProductID: req.ProductID,
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Quantity: req.Quantity,
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Price: req.Price,
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Name: req.Name,
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AddedAt: time.Now().UnixNano(),
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})
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}
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func (s Service) GetCart(ctx context.Context, userID types.ID) (GetCartResponse, error) {
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const op = "shoppingbasketapp.service.GetCart"
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if userID < 1 {
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return GetCartResponse{}, richerror.New(op).WithKind(richerror.KindInvalid).WithMessage("invalid user id")
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}
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res, err := s.repo.GetCart(ctx, userID)
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if err != nil {
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return GetCartResponse{}, richerror.New(op).WithErr(err)
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}
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return GetCartResponse{
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UserID: res.UserID,
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Items: res.Items,
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TotalPrice: res.TotalPrice,
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CreatedAt: res.CreatedAt,
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ExpireAt: res.ExpireAt,
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}, nil
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}
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func (s Service) RemoveFromCart(ctx context.Context, req RemoveFromCartRequest) error {
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const op = "shoppingbaskerapp.service.RemoveFromCart"
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if err := s.validate.ValidateRemoveFromCart(req); err != nil {
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return err
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}
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return s.repo.DeleteItem(ctx, req.UserID, req.ProductID)
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}
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func (s Service) UpdateQuantity(ctx context.Context, req UpdateQuantityRequest) error {
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const op = "shoppingbaskerapp.service.UpdateQuantity"
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if err := s.validate.ValidateUpdateQuantity(req); err != nil {
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return err
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}
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if req.Quantity == 0 {
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return s.repo.DeleteItem(ctx, req.UserID, req.ProductID)
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}
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return s.repo.UpdateQuantity(ctx, req.UserID, req.ProductID, req.Quantity)
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}
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func (s Service) ClearCart(ctx context.Context, userID types.ID) error {
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const op = "shoppingbaskerapp.service.ClearCart"
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if userID < 1 {
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return richerror.New(op).WithKind(richerror.KindInvalid).
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WithMessage("invalid user id")
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}
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return s.repo.DeleteCart(ctx, userID)
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}
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