<!--
 * @Description  :面包屑
 * @Autor        : miaofang
 * @LastEditTime: 2023-06-08 14:16:53
-->
<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span class="no-redirect">当前位置></span>
        <!-- <svg-icon v-if="item.meta.icon" :icon-class="item.meta.icon" class="breadcrumbIcon" /> -->
        <span v-if="item.redirect === 'noRedirect' || index == levelList.length - 1" class="no-redirect">
          {{ item.meta.title }}</span>
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
  import pathToRegexp from 'path-to-regexp'

  export default {
    data () {
      return {
        levelList: null
      }
    },
    watch: {
      $route (route) {
        // if you go to the redirect page, do not update the breadcrumbs
        if (route.path.startsWith('/redirect/')) {
          return
        }
        this.getBreadcrumb()
      }
    },
    created () {
      this.getBreadcrumb()
    },
    methods: {
      /**
       * @description: getBreadcrumb
       * @author: renchao
       */
      getBreadcrumb () {
        // only show routes with meta.title
        let matched = this.$route.matched.filter(item => item.meta && item.meta.title)
        const first = matched[0]

        if (!this.isDashboard(first)) {
          matched = matched
        }

        this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
      },
      /**
       * @description: isDashboard
       * @param {*} route
       * @author: renchao
       */
      isDashboard (route) {
        const name = route && route.name
        if (!name) {
          return false
        }
        return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
      },
      /**
       * @description: pathCompile
       * @param {*} path
       * @author: renchao
       */
      pathCompile (path) {
        const { params } = this.$route
        var toPath = pathToRegexp.compile(path)
        return toPath(params)
      },
      /**
       * @description: handleLink
       * @param {*} item
       * @author: renchao
       */
      handleLink (item) {
        const { redirect, path } = item
        if (redirect) {
          this.$router.push(redirect)
          return
        }
        this.$router.push(this.pathCompile(path))
      }
    }
  }
</script>

<style lang="scss" scoped>
  .app-breadcrumb.el-breadcrumb {
    display: inline-block;
    font-size: 14px;
    line-height: 50px;
    margin-left: 8px;

    .no-redirect {
      color: #ffffff;
      cursor: text;
      font-size: 16px;
    }

    .breadcrumbIcon {
      color: #ffffff;
      margin-right: 5px;
      width: 16px;
      height: 16px;
    }
  }
</style>