package controller

import (
	"SciencesServer/app/api/website/model"
	model2 "SciencesServer/app/common/model"
)

type Navigation struct{}

type NavigationHandle func() *Navigation

type NavigationInfo struct {
	Title    string            `json:"title"`
	Link     string            `json:"link"`
	Children []*NavigationInfo `json:"children"`
}

// tree 树状
func (c *Navigation) tree(src []*model2.SysNavigation, parentID uint64) []*NavigationInfo {
	out := make([]*NavigationInfo, 0)

	for _, v := range src {
		if v.ParentID == parentID {
			out = append(out, &NavigationInfo{
				Title:    v.Title,
				Link:     v.Link,
				Children: c.tree(src, v.ID),
			})
		}
	}
	return out
}

// Instance 导航栏信息
func (c *Navigation) Instance() ([]*NavigationInfo, error) {
	mSysNavigation := model.NewSysNavigation()
	out, err := mSysNavigation.Navigation()

	if err != nil {
		return nil, err
	}
	return c.tree(out, 0), nil
}

func NewNavigation() NavigationHandle {
	return func() *Navigation {
		return &Navigation{}
	}
}