54 lines
1.5 KiB
TypeScript
54 lines
1.5 KiB
TypeScript
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import { atom, PrimitiveAtom } from "jotai";
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import { IReceiptItem } from "../components/ReceiptItem";
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import parseInput from "./parseInput";
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export const totalAtom = atom(0);
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export const receiptAtom = atom<PrimitiveAtom<IReceiptItem>[]>([]);
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export const receiptTotalAtom = atom((get) => {
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const totalValue = get(totalAtom);
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const receipt = get(receiptAtom);
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const totals = new Map();
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let subtotalSum = 0;
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for (const itemAtom of receipt) {
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const item = get(itemAtom);
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const price = get(item.price);
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const splitBetween = get(item.splitBetween);
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const numSplitters = splitBetween.length;
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if (numSplitters == 0) continue;
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const eachPrice = price / numSplitters;
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subtotalSum += price;
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for (const personAtom of splitBetween) {
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const person = get(personAtom);
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const personName = person.name;
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let accum = totals.get(personName) || 0;
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accum += eachPrice;
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totals.set(personName, accum);
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}
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}
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if (subtotalSum == 0) return totals;
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const newTotals = new Map();
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const proportion = totalValue / subtotalSum;
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for (const [person, value] of totals.entries()) {
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newTotals.set(person, value * proportion);
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}
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return newTotals;
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});
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export function addLine(line: string, setReceipt) {
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let parsed = parseInput(line);
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console.log(parsed);
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const price = atom(parsed.price || 0);
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const splitBetween = atom(
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[...parsed.splitBetween].map((a) => atom({ name: a }))
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);
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setReceipt((prev) => [
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...prev,
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atom<IReceiptItem>({ name: parsed.itemName, price, splitBetween }),
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]);
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}
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