refactor(park):合并园区的Service和Repository。

service/park.go

@@ -63,3 +63,31 @@ func (_ParkService) DeletePark(uid, pid string) error {
 	}
 	return nil
 }
+
+func (_ParkService) ListAllParkBelongsTo(uid string) ([]model.Park, error) {
+	parks := make([]model.Park, 0)
+	err := global.DBConn.
+		Where(builder.Eq{"user_id": uid}).
+		NoAutoCondition().
+		Find(&parks)
+	if err != nil {
+		return make([]model.Park, 0), err
+	}
+	return parks, nil
+}
+
+func (_ParkService) FetchParkDetail(pid string) (*model.Park, error) {
+	var park = &model.Park{}
+	has, err := global.DBConn.ID(pid).NoAutoCondition().Get(park)
+	if err != nil {
+		return nil, err
+	}
+	if !has {
+		return nil, exceptions.NewNotFoundError("未找到符合条件的园区记录。")
+	}
+	return park, nil
+}
+
+func (_ParkService) EnsurePark(uid, pid string) (bool, error) {
+	return global.DBConn.Table(&model.Park{}).Where(builder.Eq{"user_id": uid, "id": pid}).Exist()
+}