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小蚂蚁云
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package logic
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import (
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"context"
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"strings"
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"github.com/gogf/gf/v2/database/gdb"
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"github.com/gogf/gf/v2/errors/gerror"
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"easygoadmin/api/v1"
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"easygoadmin/internal/consts"
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"easygoadmin/internal/dao"
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"easygoadmin/internal/service"
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)
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// ============================== 城市业务实现 ==============================
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// sCity 城市业务实现
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// 实现 service.ICity 接口，承载城市模块的业务逻辑
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type sCity struct{}
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// citySerializeMaps 枚举字段到字典编码的映射
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// {field}Text 由 dict_item 解析，字典管理页可修改文案
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var citySerializeMaps = map[string]string{
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"level": "city_level",
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}
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func init() {
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service.RegisterCity(&sCity{})
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}
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// citySpec 城市模块声明
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//
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// 仅 Page 采用声明式；List 含 parentCode、limit 等特有查询，Detail 使用嵌入结构，均手写实现
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var citySpec = ModuleSpec[v1.CityItem, v1.CityItem, v1.CityDetailRes]{
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Model: dao.City.Ctx,
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LikeFields: []string{"name", "pinyin"},
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EqFields: []string{"level"},
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OrderBy: "id",
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SerializeMaps: citySerializeMaps,
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ToData: cityToData,
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}
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// cityToData 全量表单语义转换
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// 兼容新增与修改请求，将入参转换为落库字段
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func cityToData(req any) map[string]any {
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switch r := req.(type) {
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case *v1.CityAddReq:
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return map[string]any{
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"city_code": r.CityCode, "area_code": r.AreaCode, "parent_code": r.ParentCode,
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"zip_code": r.ZipCode, "level": r.Level, "pid": r.Pid, "name": r.Name,
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"short_name": r.ShortName, "full_name": r.FullName, "pinyin": r.Pinyin,
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"lng": r.Lng, "lat": r.Lat,
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}
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case *v1.CityUpdateReq:
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return map[string]any{
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"city_code": r.CityCode, "area_code": r.AreaCode, "parent_code": r.ParentCode,
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"zip_code": r.ZipCode, "level": r.Level, "pid": r.Pid, "name": r.Name,
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"short_name": r.ShortName, "full_name": r.FullName, "pinyin": r.Pinyin,
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"lng": r.Lng, "lat": r.Lat,
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}
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}
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panic("cityToData: 不支持的入参类型")
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}
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// Page 城市分页
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// 按查询条件分页返回城市列表，采用声明式实现
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func (s *sCity) Page(ctx context.Context, req *v1.CityPageReq) (res *v1.CityPageRes, err error) {
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list, total, err := citySpec.Page(ctx, req, req.GetPageNo(), req.GetPageSize())
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if err != nil {
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return nil, err
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}
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return v1.NewPageData(req.GetPageNo(), req.GetPageSize(), total, derefSlice(list)), nil
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}
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// List 城市列表
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// 按父级编码、层级、关键词等条件返回城市列表，供级联选择器使用
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func (s *sCity) List(ctx context.Context, req *v1.CityListReq) (res v1.CityListRes, err error) {
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m := dao.City.Ctx(ctx)
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if req.ParentCode != "" {
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m = m.Where("parent_code", req.ParentCode)
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} else if req.Level > 0 {
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m = m.Where("level", req.Level)
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}
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if req.Keyword != "" {
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kw := "%" + req.Keyword + "%"
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m = m.WhereLike("name", kw).WhereOrLike("pinyin", kw)
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}
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if req.Limit > 0 {
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m = m.Limit(req.Limit)
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}
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rows, err := m.Order("id").All()
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if err != nil {
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return nil, err
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}
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list := make([]v1.CityItem, 0, len(rows))
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for _, r := range rows {
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list = append(list, s.toItem(ctx, r))
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}
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return list, nil
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}
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// Detail 城市详情
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// 按城市ID查询详情，并补充父级名称
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func (s *sCity) Detail(ctx context.Context, req *v1.CityDetailReq) (res *v1.CityDetailRes, err error) {
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one, err := dao.City.Ctx(ctx).Where("id", req.Id).One()
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if err != nil {
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return nil, err
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}
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if len(one) == 0 {
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return nil, gerror.NewCode(consts.CodeRecordNotFound)
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}
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res = &v1.CityDetailRes{CityItem: s.toItem(ctx, one)}
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if pid := one["pid"].Int64(); pid > 0 {
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if parent, e := dao.City.Ctx(ctx).Where("id", pid).Fields("name").One(); e == nil && len(parent) > 0 {
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res.ParentName = parent["name"].String()
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}
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}
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return res, nil
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}
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// Add 新增城市
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// 新增成功后返回新记录ID，采用声明式实现
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func (s *sCity) Add(ctx context.Context, req *v1.CityAddReq) (res *v1.IdRes, err error) {
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id, err := citySpec.Add(ctx, req)
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if err != nil {
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return nil, err
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}
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return &v1.IdRes{Id: id}, nil
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}
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// Update 修改城市
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// 按城市ID更新记录，采用声明式实现
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func (s *sCity) Update(ctx context.Context, req *v1.CityUpdateReq) (res *v1.CityUpdateRes, err error) {
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if err = citySpec.Update(ctx, req.Id, req); err != nil {
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return nil, err
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}
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return &v1.CityUpdateRes{}, nil
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}
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// Delete 删除城市
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// 按城市ID删除单条记录，采用声明式实现
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func (s *sCity) Delete(ctx context.Context, req *v1.CityDeleteReq) (res *v1.CityDeleteRes, err error) {
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if err = citySpec.Delete(ctx, req.Id); err != nil {
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return nil, err
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}
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return &v1.CityDeleteRes{}, nil
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}
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// BatchDelete 批量删除城市
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// 按城市ID列表批量删除记录，采用声明式实现
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func (s *sCity) BatchDelete(ctx context.Context, req *v1.CityBatchDeleteReq) (res *v1.CityBatchDeleteRes, err error) {
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if err = citySpec.BatchDelete(ctx, req.Ids); err != nil {
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return nil, err
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}
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return &v1.CityBatchDeleteRes{}, nil
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}
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// ByParent 按父编码查询下级城市
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// 登录用户即可访问，返回指定父级下的直属下级城市
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func (s *sCity) ByParent(ctx context.Context, req *v1.CityByParentReq) (res *v1.CityByParentRes, err error) {
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rows, err := dao.City.Ctx(ctx).Where("parent_code", req.ParentCode).Order("id").All()
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if err != nil {
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return nil, err
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}
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list := make([]v1.CityItem, 0, len(rows))
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for _, r := range rows {
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list = append(list, s.toItem(ctx, r))
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}
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return &v1.CityByParentRes{List: list}, nil
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}
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// GetCityList 按父编码获取下级城市
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// 登录用户即可访问，供级联选择器懒加载；parentCode 为 0 时返回顶级
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func (s *sCity) GetCityList(ctx context.Context, req *v1.CityGetListReq) (res v1.CityGetListRes, err error) {
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rows, err := dao.City.Ctx(ctx).Where("parent_code", req.ParentCode).Order("id").All()
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if err != nil {
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return nil, err
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}
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list := make([]v1.CityItem, 0, len(rows))
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for _, r := range rows {
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list = append(list, s.toItem(ctx, r))
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}
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return list, nil
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}
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// AreaProvince 省份列表
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// 登录用户即可访问，返回层级为省的顶级城市列表
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func (s *sCity) AreaProvince(ctx context.Context, req *v1.AreaParentReq) (res *v1.AreaParentRes, err error) {
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rows, err := dao.City.Ctx(ctx).Where("level", 1).Order("id").All()
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if err != nil {
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return nil, err
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}
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list := make([]v1.CityItem, 0, len(rows))
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for _, r := range rows {
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list = append(list, s.toItem(ctx, r))
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}
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return &v1.AreaParentRes{List: list}, nil
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}
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// ============================================================
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// 城市编解码（名称 ↔ 编码互转）
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// ============================================================
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// ResolveCityNames 城市编码数组转名称串
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//
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// 按 area_code 查询 name，保留输入顺序，空编码跳过。
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// 例：["320000000000","320100000000","320105000000"] 转换为 "江苏省,南京市,建邺区"
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func ResolveCityNames(ctx context.Context, codes []string, separator string) string {
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clean := make([]string, 0, len(codes))
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for _, c := range codes {
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if c != "" {
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clean = append(clean, c)
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}
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}
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if len(clean) == 0 {
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return ""
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}
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rows, err := dao.City.Ctx(ctx).WhereIn("area_code", clean).Fields("area_code, name").All()
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if err != nil {
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return ""
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}
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nameByCode := make(map[string]string, len(rows))
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for _, r := range rows {
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nameByCode[r["area_code"].String()] = r["name"].String()
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}
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names := make([]string, 0, len(clean))
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for _, code := range clean {
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if n := nameByCode[code]; n != "" {
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names = append(names, n)
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}
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}
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if separator == "" {
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separator = ","
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}
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return strings.Join(names, separator)
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}
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// ResolveCityCodes 名称串转四级编码数组
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//
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// 逐级以 parent 约束避免同名歧义。
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// 例："江苏省,南京市,建邺区" 转换为 ["320000000000","320100000000","320105000000",""]
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func ResolveCityCodes(ctx context.Context, cityInfo string) [4]string {
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var codes [4]string
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cityInfo = strings.TrimSpace(cityInfo)
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if cityInfo == "" {
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return codes
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}
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names := make([]string, 0, 4)
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for _, part := range strings.Split(cityInfo, ",") {
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if p := strings.TrimSpace(part); p != "" {
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names = append(names, p)
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}
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}
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if len(names) == 0 {
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return codes
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}
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// 第一级：省（pid = 0）
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prov, err := dao.City.Ctx(ctx).Where("pid", 0).Where("name", names[0]).One()
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if err != nil || len(prov) == 0 {
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return codes
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}
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codes[0] = prov["area_code"].String()
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// 第二级：市（parent_code = 省 area_code）
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if len(names) > 1 {
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if city, e := dao.City.Ctx(ctx).Where("parent_code", codes[0]).Where("name", names[1]).One(); e == nil && len(city) > 0 {
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codes[1] = city["area_code"].String()
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}
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}
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// 第三级：区（parent_code = 市 area_code）
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if len(names) > 2 && codes[1] != "" {
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if dist, e := dao.City.Ctx(ctx).Where("parent_code", codes[1]).Where("name", names[2]).One(); e == nil && len(dist) > 0 {
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codes[2] = dist["area_code"].String()
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}
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}
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// 第四级：街道（parent_code = 区 area_code）
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if len(names) > 3 && codes[2] != "" {
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if street, e := dao.City.Ctx(ctx).Where("parent_code", codes[2]).Where("name", names[3]).One(); e == nil && len(street) > 0 {
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codes[3] = street["area_code"].String()
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}
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}
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return codes
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}
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// toItem 数据库记录转换为城市行数据
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// 枚举层级同步补全层级文本
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func (s *sCity) toItem(ctx context.Context, r gdb.Record) v1.CityItem {
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return v1.CityItem{
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Id: r["id"].Int64(),
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CityCode: r["city_code"].String(),
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AreaCode: r["area_code"].String(),
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ParentCode: r["parent_code"].String(),
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ZipCode: r["zip_code"].String(),
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Level: r["level"].Int(),
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LevelText: DictGetText(ctx, citySerializeMaps["level"], r["level"].Int()),
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Pid: r["pid"].Int64(),
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Name: r["name"].String(),
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ShortName: r["short_name"].String(),
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FullName: r["full_name"].String(),
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Pinyin: r["pinyin"].String(),
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Lng: r["lng"].String(),
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Lat: r["lat"].String(),
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}
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}
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