/*
 * @Author:dingyuwen
 * @Date: 2022-08-10 18:14:46
 * @LastEditTime: 2022-08-11 13:37:18
 * @LastEditors:dingyuwen
 * @Description: 
 */
// 过滤树
export function treeFilter(tree: any[], func) {
  return tree
    .map(node => ({ ...node }))
    .filter(node => {
      node.children = node.children && treeFilter(node.children, func)
      return func(node) || (node.children && node.children.length)
    })
}

// 路由扁平化
export function flatAsyncRoutes(routes, breadcrumb = []) {
  const res = []
  routes.forEach(route => {
    const tmp = { ...route }
    if (tmp.children) {
      const childrenBreadcrumb = [...breadcrumb]
      childrenBreadcrumb.push(route)
      const tmpRoute = { ...route }
      tmpRoute.meta.breadcrumb = childrenBreadcrumb
      delete tmpRoute.children
      res.push(tmpRoute)
      const childrenRoutes = flatAsyncRoutes(tmp.children, childrenBreadcrumb)
      childrenRoutes.map(item => res.push(item))
    } else {
      const tmpBreadcrumb = [...breadcrumb]
      tmpBreadcrumb.push(tmp)
      tmp.meta.breadcrumb = tmpBreadcrumb
      res.push(tmp)
    }
  })

  return res
}

// 懒加载引入组件
export function loadComponent(component) {
  if (component) {
    return () => import(/* webpackChunkName: "[request]" */ `@/views/${component}.vue`)
  } else {
    return () => import(`@/views/exception/empty.vue`)
  }
}

// 转换路由表
export function filterAsyncRouter(routerMap) {
  const accessedRouters = []
  routerMap.forEach(item => {
    item.meta = item.meta ? item.meta : {}
    // 处理外部链接特殊路由
    if (item.meta.type === 'iframe') {
      item.meta.url = item.path
      item.path = `/i/${item.name}`
    }
    // MAP转路由对象
    const route = {
      path: item.path,
      name: item.name,
      meta: item.meta,
      redirect: item.redirect,
      children: item.children ? filterAsyncRouter(item.children) : null,
      component: loadComponent(item.component),
    }
    accessedRouters.push(route)
  })

  return accessedRouters
}