<template>
  <div class="app-container">
    <el-button style='margin-bottom:20px;float:right' type="primary" icon="document" @click="handleDownload">导出excel</el-button>
    <el-table :data="list" v-loading.body="listLoading" element-loading-text="拼命加载中" border fit highlight-current-row>
      <el-table-column align="center" label='ID' width="95">
        <template scope="scope">
          {{scope.$index}}
        </template>
      </el-table-column>
      <el-table-column label="文章标题">
        <template scope="scope">
          {{scope.row.title}}
        </template>
      </el-table-column>

      <el-table-column label="作者" width="110">
        <template scope="scope">
          <span>{{scope.row.author}}</span>
        </template>
      </el-table-column>
      <el-table-column label="阅读数" width="105" align="center">
        <template scope="scope">
          {{scope.row.pageviews}}
        </template>
      </el-table-column>
      <el-table-column align="center" prop="created_at" label="发布时间" width="200">
        <template scope="scope">
          <i class="el-icon-time"></i>
          <span>{{scope.row.display_time}}</span>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
import { getList } from 'api/article';
export default {
  data() {
    return {
      list: null,
      listLoading: true
    }
  },
  created() {
    this.fetchData();
  },
  methods: {
    fetchData() {
      this.listLoading = true;
      getList(this.listQuery).then(response => {
        this.list = response.data;
        this.listLoading = false;
      })
    },
    handleDownload() {
      require.ensure([], () => {
        const { export_json_to_excel } = require('vendor/Export2Excel');
        const tHeader = ['序号', '文章标题', '作者', '阅读数', '发布时间'];
        const filterVal = ['id', 'title', 'author', 'pageviews', 'display_time'];
        const list = this.list;
        const data = this.formatJson(filterVal, list);
        export_json_to_excel(tHeader, data, '列表excel');
      })
    },
    formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]))
    }
  }
};
</script>