tianyuan-api-server/apps/sentinel/internal/logic/userproduct/createuserproductlogic.go

package userproductlogic

import (
	"context"
	"errors"
	"tianyuan-api/apps/sentinel/internal/model"

	"tianyuan-api/apps/sentinel/internal/svc"
	"tianyuan-api/apps/sentinel/sentinel"

	"github.com/zeromicro/go-zero/core/logx"
)

type CreateUserProductLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewCreateUserProductLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreateUserProductLogic {
	return &CreateUserProductLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// UserProduct methods
func (l *CreateUserProductLogic) CreateUserProduct(in *sentinel.CreateUserProductRequest) (*sentinel.UserProductEmptyResponse, error) {
	isExist, err := l.IsUserProductAssociated(l.ctx, in.UserId, in.ProductId)
	if err != nil {
		return nil, err
	}
	if isExist {
		return nil, errors.New("该产品已定阅读，无法重复订阅")
	}
	product, err := l.svcCtx.ProductsModel.FindOne(l.ctx, in.ProductId)
	if err != nil {
		return nil, err
	}
	_, err = l.svcCtx.UserProductsModel.Insert(l.ctx, &model.UserProducts{UserId: in.UserId, ProductId: in.ProductId, ProductPrice: product.ProductPrice})
	if err != nil {
		return nil, err
	}

	return &sentinel.UserProductEmptyResponse{}, nil
}
func (l *CreateUserProductLogic) IsUserProductAssociated(ctx context.Context, userId, productId int64) (bool, error) {
	_, err := l.svcCtx.UserProductsModel.FindOneUserProduct(ctx, userId, productId)
	if err != nil {
		if err == model.ErrNotFound {
			return false, nil
		}
		return false, err
	}

	return true, nil
}