<template>
  <div class="app-container">
    <!-- $t is vue-i18n global function to translate lang -->
    <el-input v-model="filename" :placeholder="$t('zip.placeholder')" style="width:300px;" prefix-icon="el-icon-document" />
    <el-button :loading="downloadLoading" style="margin-bottom:20px;" type="primary" icon="document" @click="handleDownload">
      {{ $t('zip.export') }} zip
    </el-button>
    <el-table v-loading="listLoading" :data="list" element-loading-text="拼命加载中" border fit highlight-current-row>
      <el-table-column align="center" label="ID" width="95">
        <template slot-scope="scope">
          {{ scope.$index }}
        </template>
      </el-table-column>
      <el-table-column label="Title">
        <template slot-scope="scope">
          {{ scope.row.title }}
        </template>
      </el-table-column>
      <el-table-column label="Author" width="95" align="center">
        <template slot-scope="scope">
          <el-tag>{{ scope.row.author }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="Readings" width="115" align="center">
        <template slot-scope="scope">
          {{ scope.row.pageviews }}
        </template>
      </el-table-column>
      <el-table-column align="center" label="Date" width="220">
        <template slot-scope="scope">
          <i class="el-icon-time" />
          <span>{{ scope.row.display_time }}</span>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
import { fetchList } from '@/api/article';

export default {
  name: 'ExportZip',
  data() {
    return {
      list: null,
      listLoading: true,
      downloadLoading: false,
      filename: '',
    };
  },
  created() {
    this.fetchData();
  },
  methods: {
    async fetchData() {
      this.listLoading = true;
      const { data } = await fetchList();
      this.list = data.items;
      this.listLoading = false;
    },
    handleDownload() {
      this.downloadLoading = true;
      import('@/vendor/Export2Zip').then(zip => {
        const tHeader = ['Id', 'Title', 'Author', 'Readings', 'Date'];
        const filterVal = ['id', 'title', 'author', 'pageviews', 'display_time'];
        const list = this.list;
        const data = this.formatJson(filterVal, list);
        zip.export_txt_to_zip(tHeader, data, this.filename, this.filename);
        this.downloadLoading = false;
      });
    },
    formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]));
    },
  },
};
</script>