Rewrite to react

.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "next/core-web-vitals"
+}

.gitignore

@@ -1,24 +1,36 @@
-
-dist
-.solid
-.output
-.vercel
-.netlify
-netlify
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # dependencies
 /node_modules
+/.pnp
+.pnp.js
 
-# IDEs and editors
-/.idea
-.project
-.classpath
-*.launch
-.settings/
+# testing
+/coverage
 
-# Temp
-gitignore
+# next.js
+/.next/
+/out/
 
-# System Files
+# production
+/build
+
+# misc
 .DS_Store
-Thumbs.db
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

README.md

@@ -1,9 +1,34 @@
-# Wisesplit
+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
 
-Does the one calculation I expected Splitwise to have but it didn't.
+## Getting Started
 
-## Contact
+First, run the development server:
 
-License: AGPL-3.0
+```bash
+npm run dev
+# or
+yarn dev
+```
 
-Author: Michael Zhang
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `pages/index.tsx`. The page auto-updates as you edit the file.
+
+[API routes](https://nextjs.org/docs/api-routes/introduction) can be accessed on [http://localhost:3000/api/hello](http://localhost:3000/api/hello). This endpoint can be edited in `pages/api/hello.ts`.
+
+The `pages/api` directory is mapped to `/api/*`. Files in this directory are treated as [API routes](https://nextjs.org/docs/api-routes/introduction) instead of React pages.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

components/EditBox.tsx

@@ -0,0 +1,46 @@
+import { useAtom } from "jotai";
+import { useState } from "react";
+
+export default function EditBox({ valueAtom }) {
+  const [value, setValue] = useAtom(valueAtom);
+  const [valueInput, setValueInput] = useState("");
+  const [editing, setEditing] = useState(false);
+
+  const formatter = new Intl.NumberFormat("en-US", {
+    style: "currency",
+    currency: "USD",
+  });
+
+  const startEditing = (_) => {
+    setValueInput(value.toString());
+    setEditing(true);
+  };
+
+  const finalize = (e) => {
+    e.preventDefault();
+    try {
+      const n = parseFloat(valueInput);
+      setValue(n);
+      setEditing(false);
+    } catch (e) {
+      // TODO: Handle
+    }
+  };
+
+  if (editing) {
+    return (
+      <form onSubmit={finalize} style={{ display: "inline" }}>
+        <input
+          autoFocus={true}
+          type="number"
+          step="0.01"
+          value={valueInput}
+          onBlur={finalize}
+          onInput={(e) => setValueInput(e.target.value)}
+        />
+      </form>
+    );
+  } else {
+    return <span onClick={startEditing}>{formatter.format(value)}</span>;
+  }
+}

components/Person.tsx

@@ -0,0 +1,14 @@
+import { Atom, useAtom } from "jotai";
+
+export interface IPerson {
+  name: string;
+}
+
+export interface Props {
+  personAtom: Atom<IPerson>;
+}
+
+export default function Person({ personAtom }: Props) {
+  const [person, _] = useAtom(personAtom);
+  return <span style={{ marginInline: "5px" }}>{person.name}</span>;
+}

components/ReceiptItem.tsx

@@ -0,0 +1,44 @@
+import { Atom, useAtom } from "jotai";
+import EditBox from "./EditBox";
+import Person from "./Person";
+
+export interface IReceiptItem {
+  name: string;
+  price: Atom<number>;
+  splitBetween: Atom<Atom<string>[]>;
+}
+
+export interface Props {
+  itemAtom: Atom<IReceiptItem>;
+}
+
+function SplitBetween({ splitBetweenAtom }) {
+  const [splitBetween, _] = useAtom(splitBetweenAtom);
+  return splitBetween.length > 0 ? (
+    <div>
+      Split between ({splitBetween.length}):
+      {splitBetween.map((a, i) => (
+        <Person personAtom={a} key={`split-${i}`} />
+      ))}
+    </div>
+  ) : (
+    <></>
+  );
+}
+
+function Price({ priceAtom }) {
+  return <EditBox valueAtom={priceAtom} />;
+}
+
+export default function ReceiptItem({ itemAtom }: Props) {
+  const [item, _] = useAtom(itemAtom);
+  return (
+    <>
+      <span>
+        <b>{item.name}</b>
+      </span>
+      (<Price priceAtom={item.price} />)
+      <SplitBetween splitBetweenAtom={item.splitBetween} />
+    </>
+  );
+}

lib/parseInput.tsx

@@ -0,0 +1,59 @@
+export interface ParsedInput {
+  itemName: string;
+  price?: number;
+  splitBetween: Set<string>;
+}
+
+export function ParsedInputDisplay({ input }) {
+  const parsed = parseInput(input);
+
+  const formatter = new Intl.NumberFormat("en-US", {
+    style: "currency",
+    currency: "USD",
+  });
+
+  return (
+    <div style={{ fontSize: ".8em" }}>
+      <div>
+        <b>{parsed.itemName}</b>
+
+        {parsed.price !== undefined && <>({formatter.format(parsed.price)})</>}
+      </div>
+
+      {parsed.splitBetween.size > 0 && (
+        <>
+          Split between:
+          <ul>
+            {[...parsed.splitBetween].map((personName) => (
+              <li key={personName}>{personName}</li>
+            ))}
+          </ul>
+        </>
+      )}
+    </div>
+  );
+}
+
+export default function parseInput(line: string): ParsedInput {
+  const words = line.split(" ");
+
+  let price = undefined;
+  const splitBetween = new Set<string>();
+  const final = [];
+  for (let word of words) {
+    if (word.startsWith("$") && word.length > 1) {
+      price = parseFloat(word.slice(1));
+      continue;
+    }
+
+    if (word.startsWith("@") && word.length > 1) {
+      splitBetween.add(word.slice(1));
+      continue;
+    }
+
+    final.push(word);
+  }
+
+  const itemName = final.join(" ");
+  return { itemName, price, splitBetween };
+}

next.config.js

@@ -0,0 +1,7 @@
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  reactStrictMode: true,
+  swcMinify: true,
+}
+
+module.exports = nextConfig

package.json

@@ -1,24 +1,27 @@
 {
-  "name": "splitwise",
+  "name": "wisesplit",
+  "version": "0.1.0",
+  "private": true,
   "scripts": {
-    "dev": "solid-start dev",
-    "build": "solid-start build",
-    "start": "solid-start start"
-  },
-  "type": "module",
-  "devDependencies": {
-    "solid-start-node": "^0.2.0",
-    "typescript": "^4.8.4",
-    "vite": "^3.1.8"
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
   },
   "dependencies": {
-    "@solidjs/meta": "^0.28.0",
-    "@solidjs/router": "^0.5.0",
-    "solid-js": "^1.6.0",
-    "solid-start": "^0.2.0",
-    "undici": "^5.11.0"
+    "@reduxjs/toolkit": "^1.8.6",
+    "jotai": "^1.8.6",
+    "next": "12.3.1",
+    "react": "18.2.0",
+    "react-dom": "18.2.0",
+    "react-redux": "^8.0.4"
   },
-  "engines": {
-    "node": ">=16"
+  "devDependencies": {
+    "@types/node": "18.11.4",
+    "@types/react": "18.0.21",
+    "@types/react-dom": "18.0.6",
+    "eslint": "8.26.0",
+    "eslint-config-next": "12.3.1",
+    "typescript": "4.8.4"
   }
-}
+}

pages/_app.tsx

@@ -0,0 +1,8 @@
+import "../styles/globals.css";
+import type { AppProps } from "next/app";
+
+function MyApp({ Component, pageProps }: AppProps) {
+  return <Component {...pageProps} />;
+}
+
+export default MyApp;

pages/api/hello.ts

@@ -0,0 +1,13 @@
+// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
+import type { NextApiRequest, NextApiResponse } from 'next'
+
+type Data = {
+  name: string
+}
+
+export default function handler(
+  req: NextApiRequest,
+  res: NextApiResponse<Data>
+) {
+  res.status(200).json({ name: 'John Doe' })
+}

pages/index-old.tsx

@@ -0,0 +1,82 @@
+import type { NextPage } from "next";
+import EditBox from "../components/EditBox";
+
+const Home: NextPage = () => {
+  return (
+    <main>
+      <h2>Items</h2>
+
+      <details>
+        <summary>Details for nerds</summary>
+        <pre>{JSON.stringify(state)}</pre>
+      </details>
+
+      <p>
+        Final total: {formatter.format(state.finalTotal)}
+        <EditBox value={state.finalTotal} />
+        <input
+          type="text"
+          onInput={(e) => trySetNum(["finalTotal"], e.target.value)}
+          value={state.finalTotal}
+        />
+      </p>
+
+      <ul style={{ "text-align": "left" }}>
+        <For each={state.items}>
+          {(item, i) => (
+            <li>
+              {item.name} ({formatter.format(item.price)})
+              <input
+                type="text"
+                onInput={(e) =>
+                  trySetNum(["items", i(), "price"], e.target.value)
+                }
+                value={item.price}
+              />
+              <ul>
+                <For each={item.people}>
+                  {(person, j) => <li>{person.name}</li>}
+                </For>
+                <li>
+                  <form onSubmit={(e) => itemAddPerson(e, i())}>
+                    <input
+                      type="text"
+                      placeholder="Add person to split..."
+                      onInput={(e) =>
+                        setState("items", i(), "personEdit", e.target.value)
+                      }
+                      value={item.personEdit}
+                    />
+                  </form>
+                </li>
+              </ul>
+            </li>
+          )}
+        </For>
+
+        <li>
+          <form onSubmit={addItem}>
+            <input
+              type="text"
+              placeholder="Add item..."
+              onInput={(e) => setState("itemEdit", e.target.value)}
+              value={state.itemEdit}
+            />
+          </form>
+        </li>
+      </ul>
+
+      <ul>
+        <For each={Array.from(state.totals)}>
+          {([person, amount], i) => (
+            <li>
+              {person} : {formatter.format(amount)}
+            </li>
+          )}
+        </For>
+      </ul>
+    </main>
+  );
+};
+
+export default Home;

pages/index.tsx

@@ -0,0 +1,117 @@
+import { atom, PrimitiveAtom, useAtom } from "jotai";
+import { selectAtom } from "jotai/utils";
+import type { NextPage } from "next";
+import { useState } from "react";
+import EditBox from "../components/EditBox";
+import ReceiptItem, { IReceiptItem } from "../components/ReceiptItem";
+import Totals from "../components/Totals";
+import parseInput, { ParsedInputDisplay } from "../lib/parseInput";
+
+const totalAtom = atom(0);
+const receiptAtom = atom<PrimitiveAtom<IReceiptItem>[]>([]);
+
+const receiptTotalAtom = atom((get) => {
+  const totalValue = get(totalAtom);
+  const receipt = get(receiptAtom);
+
+  const totals = new Map();
+  let subtotalSum = 0;
+  for (const itemAtom of receipt) {
+    const item = get(itemAtom);
+    const price = get(item.price);
+    const splitBetween = get(item.splitBetween);
+    const numSplitters = splitBetween.length;
+    if (numSplitters == 0) continue;
+
+    const eachPrice = price / numSplitters;
+    subtotalSum += price;
+    for (const personAtom of splitBetween) {
+      const person = get(personAtom);
+      const personName = person.name;
+      let accum = totals.get(personName) || 0;
+      accum += eachPrice;
+      totals.set(personName, accum);
+    }
+  }
+
+  if (subtotalSum == 0) return totals;
+
+  const newTotals = new Map();
+  const proportion = totalValue / subtotalSum;
+  for (const [person, value] of totals.entries()) {
+    newTotals.set(person, value * proportion);
+  }
+  return newTotals;
+});
+
+const Home: NextPage = () => {
+  const [receipt, setReceipt] = useAtom(receiptAtom);
+  const [total] = useAtom(receiptTotalAtom);
+  const [input, setInput] = useState("");
+
+  const formatter = new Intl.NumberFormat("en-US", {
+    style: "currency",
+    currency: "USD",
+  });
+
+  const add = (e) => {
+    e.preventDefault();
+    let parsed = parseInput(input);
+    console.log(parsed);
+    const price = atom(parsed.price || 0);
+    const splitBetween = atom(
+      [...parsed.splitBetween].map((a) => atom({ name: a }))
+    );
+    setReceipt((prev) => [
+      ...prev,
+      atom<IReceiptItem>({ name: parsed.itemName, price, splitBetween }),
+    ]);
+    setInput("");
+    return false;
+  };
+
+  return (
+    <main>
+      <h2>Items</h2>
+
+      <div>
+        Receipt Total:
+        <EditBox valueAtom={totalAtom} />
+      </div>
+
+      <form onSubmit={add}>
+        <ParsedInputDisplay input={input} />
+
+        <input
+          type="text"
+          placeholder="Add item..."
+          onInput={(e) => setInput(e.target.value)}
+          value={input}
+        />
+      </form>
+
+      <ul>
+        {receipt.map((itemAtom, i) => {
+          return (
+            <li key={`receiptItem-${i}`}>
+              <ReceiptItem itemAtom={itemAtom} />
+            </li>
+          );
+        })}
+      </ul>
+
+      <div>
+        Total breakdown:
+        <ul>
+          {[...total.entries()].map(([person, value], i) => (
+            <li key={`breakdown-${i}`}>
+              <b>{person}</b>: {formatter.format(value)}
+            </li>
+          ))}
+        </ul>
+      </div>
+    </main>
+  );
+};
+
+export default Home;

public/vercel.svg

@@ -0,0 +1,4 @@
+<svg width="283" height="64" viewBox="0 0 283 64" fill="none" 
+    xmlns="http://www.w3.org/2000/svg">
+    <path d="M141.04 16c-11.04 0-19 7.2-19 18s8.96 18 20 18c6.67 0 12.55-2.64 16.19-7.09l-7.65-4.42c-2.02 2.21-5.09 3.5-8.54 3.5-4.79 0-8.86-2.5-10.37-6.5h28.02c.22-1.12.35-2.28.35-3.5 0-10.79-7.96-17.99-19-17.99zm-9.46 14.5c1.25-3.99 4.67-6.5 9.45-6.5 4.79 0 8.21 2.51 9.45 6.5h-18.9zM248.72 16c-11.04 0-19 7.2-19 18s8.96 18 20 18c6.67 0 12.55-2.64 16.19-7.09l-7.65-4.42c-2.02 2.21-5.09 3.5-8.54 3.5-4.79 0-8.86-2.5-10.37-6.5h28.02c.22-1.12.35-2.28.35-3.5 0-10.79-7.96-17.99-19-17.99zm-9.45 14.5c1.25-3.99 4.67-6.5 9.45-6.5 4.79 0 8.21 2.51 9.45 6.5h-18.9zM200.24 34c0 6 3.92 10 10 10 4.12 0 7.21-1.87 8.8-4.92l7.68 4.43c-3.18 5.3-9.14 8.49-16.48 8.49-11.05 0-19-7.2-19-18s7.96-18 19-18c7.34 0 13.29 3.19 16.48 8.49l-7.68 4.43c-1.59-3.05-4.68-4.92-8.8-4.92-6.07 0-10 4-10 10zm82.48-29v46h-9V5h9zM36.95 0L73.9 64H0L36.95 0zm92.38 5l-27.71 48L73.91 5H84.3l17.32 30 17.32-30h10.39zm58.91 12v9.69c-1-.29-2.06-.49-3.2-.49-5.81 0-10 4-10 10V51h-9V17h9v9.2c0-5.08 5.91-9.2 13.2-9.2z" fill="#000"/>
+</svg>

styles/Home.module.css

@@ -0,0 +1,129 @@
+.container {
+  padding: 0 2rem;
+}
+
+.main {
+  min-height: 100vh;
+  padding: 4rem 0;
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+}
+
+.footer {
+  display: flex;
+  flex: 1;
+  padding: 2rem 0;
+  border-top: 1px solid #eaeaea;
+  justify-content: center;
+  align-items: center;
+}
+
+.footer a {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  flex-grow: 1;
+}
+
+.title a {
+  color: #0070f3;
+  text-decoration: none;
+}
+
+.title a:hover,
+.title a:focus,
+.title a:active {
+  text-decoration: underline;
+}
+
+.title {
+  margin: 0;
+  line-height: 1.15;
+  font-size: 4rem;
+}
+
+.title,
+.description {
+  text-align: center;
+}
+
+.description {
+  margin: 4rem 0;
+  line-height: 1.5;
+  font-size: 1.5rem;
+}
+
+.code {
+  background: #fafafa;
+  border-radius: 5px;
+  padding: 0.75rem;
+  font-size: 1.1rem;
+  font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
+    Bitstream Vera Sans Mono, Courier New, monospace;
+}
+
+.grid {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-wrap: wrap;
+  max-width: 800px;
+}
+
+.card {
+  margin: 1rem;
+  padding: 1.5rem;
+  text-align: left;
+  color: inherit;
+  text-decoration: none;
+  border: 1px solid #eaeaea;
+  border-radius: 10px;
+  transition: color 0.15s ease, border-color 0.15s ease;
+  max-width: 300px;
+}
+
+.card:hover,
+.card:focus,
+.card:active {
+  color: #0070f3;
+  border-color: #0070f3;
+}
+
+.card h2 {
+  margin: 0 0 1rem 0;
+  font-size: 1.5rem;
+}
+
+.card p {
+  margin: 0;
+  font-size: 1.25rem;
+  line-height: 1.5;
+}
+
+.logo {
+  height: 1em;
+  margin-left: 0.5rem;
+}
+
+@media (max-width: 600px) {
+  .grid {
+    width: 100%;
+    flex-direction: column;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  .card,
+  .footer {
+    border-color: #222;
+  }
+  .code {
+    background: #111;
+  }
+  .logo img {
+    filter: invert(1);
+  }
+}

styles/globals.css

@@ -0,0 +1,26 @@
+html,
+body {
+  padding: 0;
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
+    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
+}
+
+a {
+  color: inherit;
+  text-decoration: none;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+@media (prefers-color-scheme: dark) {
+  html {
+    color-scheme: dark;
+  }
+  body {
+    color: white;
+    background: black;
+  }
+}

tsconfig.json

@@ -1,16 +1,21 @@
 {
   "compilerOptions": {
-    "allowSyntheticDefaultImports": true,
+    "target": "es6",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "downlevelIteration": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "noEmit": true,
     "esModuleInterop": true,
-    "target": "ESNext",
-    "module": "ESNext",
+    "module": "esnext",
     "moduleResolution": "node",
-    "jsxImportSource": "solid-js",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
     "jsx": "preserve",
-    "types": ["vite/client"],
-    "baseUrl": "./",
-    "paths": {
-      "~/*": ["./src/*"]
-    }
-  }
+    "incremental": true
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
+  "exclude": ["node_modules"]
 }