YiTao/service/item_service.go

package service

import (
	"strconv"
	"yitao/ecode"
	"yitao/model"
)

type ItemService struct{}

func (s *ItemService) CreateItem(uid uint, itemname string, desc string, types []int, imgs []string, price int) (item *model.ItemModel, e *ecode.Ecode) {
	item = new(model.ItemModel)
	e = ecode.OK()
	item.Itemname = itemname
	item.Desc = desc
	item.Types = types
	item.Imgs = imgs
	item.Price = price
	item.State = model.ItemStateOnSale
	item.Uid = uid
	model.DB.Create(item)
	if item.ID == 0 {
		return nil, ecode.Item(ecode.ITEM_CREATE_ERR)
	}
	return
}

func (s *ItemService) DeleteItem(uid uint, item_id uint) *ecode.Ecode {
	item := new(model.ItemModel)
	model.DB.Where("id=?", item_id).First(item)
	if item.Uid != uid {
		return ecode.Item(ecode.ITEM_PERMISSION_DENIED)
	}
	// 将商品状态设置为删除
	item.State = model.ItemStateDelete
	model.DB.Save(item)

	return ecode.OK()
}

func (s *ItemService) GetItem(id uint) (item *model.ItemModel, e *ecode.Ecode) {
	item = new(model.ItemModel)
	e = ecode.OK()
	model.DB.Where("id=?", id).Where("state!=?", model.ItemStateDelete).First(item)
	if item.ID == 0 {
		return item, ecode.Item(ecode.ITEM_NOT_FOUND)
	}
	return
}

func (s *ItemService) GetItems(ttype int, page int, page_size int) (items []model.ItemModel, e *ecode.Ecode) {
	e = ecode.OK()
	model.DB.Where("state!=?", model.ItemStateDelete).Where("types like ?", "%"+strconv.Itoa(ttype)+"%").Offset((page - 1) * page_size).Limit(page_size).Find(&items)
	return
}

func (s *ItemService) Search(keyword string, page int, page_size int) (items []model.ItemModel, e *ecode.Ecode) {
	e = ecode.OK()
	model.DB.Where("state!=?", model.ItemStateDelete).Where("itemname like ?", "%"+keyword+"%").Offset((page - 1) * page_size).Limit(page_size).Find(&items)
	return
}

// 历史记录模块
/*********************************************************************************/

func (s *ItemService) PutHistory(uid uint, item_id uint) *ecode.Ecode {
	h := new(model.HistoryModel)
	// 查看以前共有几条纪录
	var c int64
	model.DB.Model(h).Where("user_id=? and item_id=?", uid, item_id).Count(&c)
	h.UserId = uid
	h.ItemId = item_id
	h.Count = int(c) + 1
	model.DB.Create(h)
	return ecode.OK()
}

// 类型服务模块
/*********************************************************************************/

func (s *ItemService) GetTypes() (types []model.TypeModel, e *ecode.Ecode) {
	e = ecode.OK()
	model.DB.Find(&types)
	return
}

func (s *ItemService) CreateType(name string) *ecode.Ecode {
	t := new(model.TypeModel)
	// 判断该名称是否已存在
	model.DB.Where("name=?", name).First(t)
	if t.ID != 0 {
		return ecode.Item(ecode.ITEM_TYPE_EXIST)
	}

	t.Name = name
	model.DB.Create(t)
	return ecode.OK()
}