mirror of
https://github.com/lynchmarkHQ/lynchmark.com.git
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21 lines
873 B
JavaScript
21 lines
873 B
JavaScript
const libs=(()=>{let c;return()=>c||(c=Promise.all([
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import('https://cdn.jsdelivr.net/npm/d3-dsv@3/+esm'),
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import('https://cdn.jsdelivr.net/npm/lodash-es@4.17.21/groupBy.js')
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]).then(([dsv,gb])=>({parse:dsv.csvParse,groupBy:gb.default||gb})));})();
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const toNum=v=>{const n=+v;return Number.isFinite(n)?n:0};
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async function processCSV(csv,opts){
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const {parse,groupBy}=await libs();
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const rows=parse(csv);
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const {filterColumn:fc,filterValue:fv,groupBy:gc,aggregateColumn:ac,operation:op}=opts;
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const pool=groupBy(rows.filter(r=>r[fc]==fv),r=>r[gc]??'');
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const calc={
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sum:x=>x.reduce((t,r)=>t+toNum(r[ac]),0),
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avg:x=>x.length?x.reduce((t,r)=>t+toNum(r[ac]),0)/x.length:0,
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count:x=>x.length
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}[op];
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if(!calc) throw new Error('Unsupported operation');
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return Object.entries(pool).map(([k,x])=>({[gc]:k,result:calc(x)}));
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}
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export default processCSV; |