03- react + hooks实现阶乘表格

显示效果:


screenshot-20210620-224820.png

代码如下:

import React, { useEffect, useMemo, useState } from 'react'
import { Row, Col, Select, Checkbox, Button,  Table } from 'antd'
import styles from './index.module.scss'
import {getMetadataOption, IOption} from '../../api/factorialTable'
const { Option } = Select
const CheckboxGroup = Checkbox.Group

interface IMetadata {
 id: number,
 metadata?: IOption
}

function RenderMetadata(props:any) {
 const { limit, selectOptions, metadata, setMainMetadata, formatDataSource, formatColumns } = props
 // 已选择了的metadata
 const selecteds:string[] = useMemo(() => {
   const fiterData:IMetadata[] =  metadata.filter((item:any) => item.metadata)
   return fiterData.map((item:any) => item.metadata.id)
 },[metadata])
 // 修改metadata项
 const updateMetadata = (value:any, index:number) => {
   const metadataItem = selectOptions.find((item:IOption) => item.id === value)
   setMainMetadata((prev:IMetadata[]) => {
     const temp:IMetadata[] = prev.map((item:IMetadata, i:number) => {
       return i === index ? { ...item, metadata: {...metadataItem} } : item
     })
     return temp
   })
 }
 // 修改metadata项选择的labels
 const updateMetadataCheckedLabels = (value:string[], index:number) => {
   const temp = metadata
   temp[index].metadata.checkedLabels = value
   formatColumns(temp)
   formatDataSource(temp)
 }
 return (
   <div className={styles.row_wrap}>
     {metadata.map((item:any, index:number) => {
       return (
         <Row className={styles.row_wrap} key={item.id}>
           <Col span={6}>
             <Select
               placeholder="请选择metadata"
               style={{ width: '100%' }}
               onChange={(value) => {
                 updateMetadata(value, index)
               }}
             >
               {selectOptions.length &&
                 selectOptions.map((item:any) => (
                   <Option key={Math.random()} value={item.id} disabled={selecteds.includes(item.id)}>
                     {item.name}
                   </Option>
                 ))}
             </Select>
           </Col>
           <Col span={8} offset={1}>
             <CheckboxGroup
             value={item?.metadata?.checkedLabels}
               options={item?.metadata?.labels}
               onChange={(value) => {
                 updateMetadataCheckedLabels(value as string[], index)
               }}
             />
           </Col>
           <Col span={1} >
             <Button
               type="link"
               danger
               onClick={() => {
                 setMainMetadata((prev:IMetadata[]) => {
                   return prev.filter((i:IMetadata) => item.id !== i.id)
                 })
               }}
             >
               删除
             </Button>
           </Col>
         </Row>
       )
     })}
     {metadata && metadata.length < limit ? (
       <Row>
         <Col span={6}>
           <Button
             type="primary"
             onClick={() => {
               setMainMetadata((prev:IMetadata[]) => {
                 return [...prev, { id: Math.random() }]
               })
             }}
           >
             还可添加{limit - metadata.length}个主Metadata
           </Button>
         </Col>
       </Row>
     ) : null}
   </div>
 )
}

function FactorialTable() {
 const [selectOptions, setSelectOptions] = useState<IOption[]>([])
 const [mainMetadata, setMainMetadata] = useState<IMetadata[]>([])
 const [columns, setColumns] = useState<any>([])
 const [tableData, setTableData] = useState([])

 useEffect( () => {
   fetchMetadataOption()
 },[])

 const fetchMetadataOption = async () => {
   const  res:any = await getMetadataOption()
   setSelectOptions(res.result || [])
 }

 // 计算rowSpan
 const calculateRowSpan = (colIndex:number, rowIndex:number, list:IMetadata[], row:any) => {
   let rowSpan = 1
   list.forEach((item:any, index:number) => {
     if (index > colIndex) {
       rowSpan = rowSpan * item?.metadata.checkedLabels.length
     }
   })
   return colIndex < list.length - 1 ? (rowIndex % rowSpan === 0 ? rowSpan : 0) : 1
 }

 // 格式化表头
 const formatColumns = (data:IMetadata[]) => {
   const fiterData:IMetadata[] =  data.filter((item:any) => item.metadata && item?.metadata?.checkedLabels.length)
   const tempColumns = fiterData.map((item:any, colIndex:number) => {
     return {
       title: item?.metadata.name,
       dataIndex: item?.metadata.type,
       key: item?.metadata.type,
       render: (value:any, row:any, rowIndex:any) => ({
         children: value,
         props: {
           rowSpan: calculateRowSpan(colIndex, rowIndex, fiterData, row),
         },
       }),
     }
   })
   setColumns(tempColumns)
 }

 // 通过label值找名称
 const findNameByValue = (value:string, list:any) => {
   return list.find((item:any) => item.value === value).label
 }

 // 格式化表格字段
 const formatDataSource = (data:IMetadata[]) => {
   const fiterData:IMetadata[] = data.filter((item:any) => item.metadata && item.metadata.checkedLabels.length)
   let tempData:any = [] 
   fiterData.forEach((item:any) => {
     let arr = tempData
     tempData = []
     if (item.metadata && item.metadata.checkedLabels) {
       if (arr.length) {
         arr.forEach((temp:any) => {
           item.metadata.checkedLabels.forEach((label:string)=> {
             tempData.push({
               ...temp,
               [item.metadata.type]: findNameByValue(label, item.metadata.labels),
             })
           })
         })
       } else {
         item.metadata.checkedLabels.forEach((label:any) => {
           tempData.push({ [item.metadata.type]: findNameByValue(label, item.metadata.labels) })
         })
       }
     }
   })
   setTableData(tempData)
 }

 useEffect(() => {
   formatColumns(mainMetadata)
   formatDataSource(mainMetadata)
 }, [mainMetadata]) // eslint-disable-line react-hooks/exhaustive-deps

 return (
   <div>
     <Row className={styles.row_wrap}>
       <Col span={4}>主Metadata*</Col>
       <Col span={20}>
         <RenderMetadata
           selectOptions={selectOptions}
           limit={4}
           setMainMetadata={setMainMetadata}
           formatDataSource={formatDataSource}
           formatColumns={formatColumns}
           metadata={mainMetadata}
         />
       </Col>
     </Row>
     <Row>
       <Col span={24}>主Metadata生成标准SKU</Col>
       <Col span={24}>
         <Table size="small" dataSource={tableData} columns={columns} pagination={false} bordered />
       </Col>
     </Row>
   </div>
 )
}

export default FactorialTable

案例代码:https://github.com/lee-won/reactCaseDome

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