Rufus Pollock 3a0f4e7b96 [examples/data-literate][m]: factor our a working markdown+CSV (data literate) example from site (where we already had a demo).
* removed a few extraneous things
* added the README.md with some instructions
2022-02-21 12:25:46 +01:00

84 lines
1.9 KiB
JavaScript

import axios from 'axios'
import React, { useEffect, useState } from 'react'
const papa = require("papaparse")
/*
Simple HTML Table
usage: <OutTable data={data} cols={cols} />
data:Array<Array<any> >;
cols:Array<{name:string, key:number|string}>;
*/
export default function Table({ data=[], cols=[], csv='', url='' }) {
if (csv) {
const out = parseCsv(csv)
data = out.rows
cols = out.cols
}
const [ourdata, setData] = React.useState(data)
const [ourcols, setCols] = React.useState(cols)
const [error, setError] = React.useState('')
useEffect(() => {
if (url) {
loadUrl(url)
}
}, [url])
function loadUrl(path) {
// HACK: duplicate of Excel code - maybe refactor
// if url is external may have CORS issue so we proxy it ...
if (url.startsWith('http')) {
const PROXY_URL = window.location.origin + '/api/proxy'
url = PROXY_URL + '?url=' + encodeURIComponent(url)
}
axios.get(url).then((res) => {
const { rows, fields } = parseCsv(res.data)
setData(rows)
setCols(fields)
})
}
return (
<>
<SimpleTable data={ourdata} cols={ourcols} />
</>
)
}
/*
Simple HTML Table
usage: <OutTable data={data} cols={cols} />
data:Array<Array<any> >;
cols:Array<{name:string, key:number|string}>;
*/
function SimpleTable({ data=[], cols=[] }) {
return (
<div className="table-responsive">
<table className="table table-striped">
<thead>
<tr>{cols.map((c) => <th key={c.key}>{c.name}</th>)}</tr>
</thead>
<tbody>
{data.map((r,i) => <tr key={i}>
{cols.map(c => <td key={c.key}>{ r[c.key] }</td>)}
</tr>)}
</tbody>
</table>
</div>
)
}
function parseCsv(csv) {
csv = csv.trim()
const rawdata = papa.parse(csv, {header: true})
const cols = rawdata.meta.fields.map((r,i) => {
return { key: r, name: r }
})
return {
rows: rawdata.data,
fields: cols
}
}