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17 lines
745 B
JavaScript
17 lines
745 B
JavaScript
export const processCSV = async (str, { filterColumn: fc, filterValue: fv, groupBy: gb, aggregateColumn: ac, operation: op }) => {
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const [{ parse }, { filter, groupBy, map, sum }] = await Promise.all([
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import('https://cdn.jsdelivr.net/npm/papaparse@5.4.1/+esm'),
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import('https://cdn.jsdelivr.net/npm/lodash-es@4.17.21/+esm')
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])
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const { data } = parse(str, { header: true, skipEmptyLines: true })
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const rows = filter(data, r => r[fc] == fv)
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return map(groupBy(rows, gb), (group, key) => {
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const vals = map(group, r => +r[ac] || 0)
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const total = sum(vals)
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const res = op === 'count' ? group.length : op === 'sum' ? total : total / group.length
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return { [gb]: key, result: res }
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})
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}
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export default processCSV; |