表格导出

根据表格的ref来返回导出excel所需参数

export const getTableExcelOpts = (page, refName) => {
  const data = []
  const tHeader = [] // table Header
  const secondTHeader = [] // 二级表头
  const mergeHeader = [] // 一级、二级表头 merge 规则
  const filterVal = [] // 列对应属性
  const singleHeader = []
  const ref = page && refName && page.$refs && page.$refs[refName]
  let childrenNode = []
  if (ref) {
    if (Array.isArray(ref)) {
      childrenNode = ref[0] ? (ref[0].$children || []) : []
    } else {
      childrenNode = ref.$children || []
    }
  }
  let totalIdx = 0
  let needMerge = false
  childrenNode.filter(el => el && el.label && el.type !== 'index' && el.type !== 'operation').forEach((el, idx) => {
    const children = el.$children || []
    const childrenLen = children.length || 0
    tHeader.push(el.label)
    secondTHeader.push(childrenLen > 0 ? children[0].label : '')
    mergeHeader.push({
      s: {
        r: 0,
        c: totalIdx
      },
      e: {
        r: childrenLen > 0 ? 0 : 1,
        c: childrenLen > 0 ? (totalIdx + childrenLen - 1) : totalIdx
      }
    })

    if (childrenLen > 0) {
      needMerge = true
      filterVal.push(children[0].prop)

      if (childrenLen > 1) {
        children.filter((cEl, cIdx) => cIdx > 0).forEach(cEl => {
          tHeader.push('')
          secondTHeader.push(cEl.label)
          filterVal.push(cEl.prop)
        })
      }
      children.forEach(cEl => {
        const pLabel = el.label || ''
        if (pLabel && pLabel.indexOf('/万元') > -1) {
          singleHeader.push(pLabel.replace('/万元') + '' + cEl.label)
        } else if (pLabel && pLabel.indexOf('/万') > -1) {
          singleHeader.push(pLabel.replace('/万', '') + '' + cEl.label + '/万')
        } else {
          singleHeader.push(pLabel + '' + cEl.label)
        }
      })
    } else {
      filterVal.push(el.prop)
      singleHeader.push(el.label)
    }

    totalIdx += childrenLen || 1
  })

  if (needMerge) {
    data.unshift(secondTHeader)
  }

  return {
    filterVal: filterVal || [],
    singleHeader: singleHeader || [],
    excelOpts: {
      header: tHeader,
      data,
      autoWidth: true,
      bookType: 'xlsx',
      merges: needMerge ? mergeHeader : {}
    }
  }
}

 

export const exportExcel = (self, ref, dataList, fileName, extra = [], beforeheaderInfo) => {
  // 获取列表结构数据
  const opts = getTableExcelOpts(self, ref)
  const excelOpts = opts.excelOpts || {}
  const extraFilterVal = extra.map(col => { return col.value }) // 额外导出列字段
  const extraHeader = extra.map(col => { return col.label }) // 额外导出列名称
  const filterVal = [...opts.filterVal || [], ...extraFilterVal]
  excelOpts.header = [...excelOpts.header, ...extraHeader]
  const data = excelOpts.data || []
  import('../Export2Excel.js').then(excel => {
    dataList.forEach(v => {
      const d = filterVal.map(j => {
        let val = v[j]
        return (typeof (val) === 'undefined') ? null : val
      })
      data.push(d)
    })

    const style = {
      alignment: {
        wrapText: 1, // 自动换行
        vertical: 'center',
        horizontal: 'center'
      }
    }
    excel.export_json_to_excel({
      ...excelOpts,
      filename: fileName,
      maxWidth: 50,
      data,
      style,
      beforeheaderInfo
    })
  }).catch((err) => {
    self.ErrorMessage(err, '导出失败')
  })
}