First version

README.md

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+# CalFlow
+A simple calorie tracking app
+
+## Development Setup
+### DB
+Start the corresponding docker-compose file to run a temporary postgres instance.
+
+To inspect the DB state directly `docker compose exec pg psql -U postgres test`
+
+### Backend
+Go into the backend folder and run it using `cargo run`
+
+### Frontend
+1. Start a node environment using docker (`docker run -it -v $(pwd):/mnt/calflow --net=host node:25 /bin/bash`)
+2. Go into the frontend folder (`cd /mnt/calflow/frontend`)
+3. Start the dev server (`npm run dev -- --host`)

backend/.gitignore

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+target/

backend/Cargo.toml

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+[package]
+name = "backend"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+axum = { version = "0.8.7" }
+tokio = { version = "1.48.0", features = ["rt", "net"] }
+tracing = { version = "0.1.43" }
+tracing-subscriber = { version = "0.3.22", features = ["json"] }
+
+sqlx = { version = "0.8.6", features = ["runtime-tokio", "postgres", "sqlite"] }
+serde_json = "1.0.145"
+serde = { version = "1.0.228", features = ["derive"] }
+tower = "0.5.2"
+tower-http = { version = "0.6.7", features = ["cors"] }

backend/migrations/1_initial.sql

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+CREATE TABLE IF NOT EXISTS units (
+  id BIGSERIAL PRIMARY KEY,
+  name VARCHAR(255),
+  short VARCHAR(255),
+  UNIQUE(name),
+  UNIQUE(short)
+);
+
+CREATE TABLE IF NOT EXISTS food (
+  id BIGSERIAL PRIMARY KEY,
+  version BIGINT,
+  name VARCHAR(255),
+  unit_id BIGINT REFERENCES units(id),
+  UNIQUE(name, version)
+);
+
+CREATE TABLE IF NOT EXISTS nutritional_kind (
+  id BIGSERIAL PRIMARY KEY,
+  name VARCHAR(255),
+  unit_id BIGINT REFERENCES units(id),
+  UNIQUE (name)
+);
+
+CREATE TABLE IF NOT EXISTS food_base (
+  food_id BIGINT REFERENCES food(id),
+  kind_id BIGINT REFERENCES nutritional_kind(id),
+  value FLOAT,
+  PRIMARY KEY (food_id, kind_id)
+);
+
+INSERT INTO units(name, short) VALUES('Gram', 'g');
+INSERT INTO units(name, short) VALUES('Milliliter', 'ml');
+
+CREATE TABLE IF NOT EXISTS tracking (
+  id BIGSERIAL PRIMARY KEY,
+  food_id BIGINT REFERENCES food(id),
+  quantity FLOAT,
+  ts BIGINT
+);

backend/src/lib.rs

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+use std::sync::Arc;
+
+struct SharedState {
+    db: sqlx::postgres::PgPool,
+}
+
+pub fn app(db: sqlx::postgres::PgPool) -> axum::Router {
+    axum::Router::new()
+        .nest("/food", food::router())
+        .nest("/units", units::router())
+        .nest("/nutrition", nutrition::router())
+        .nest("/tracking", tracking::router())
+        .layer(tower::ServiceBuilder::new().layer(tower_http::cors::CorsLayer::very_permissive()))
+        .with_state(Arc::new(SharedState { db }))
+}
+
+mod units {
+    use super::SharedState;
+    use std::sync::Arc;
+
+    use axum::extract::State;
+
+    pub fn router() -> axum::Router<Arc<SharedState>> {
+        axum::Router::new()
+        .route("/list", axum::routing::get(list))
+            .route("/create", axum::routing::post(add))
+    }
+
+    #[derive(Debug, serde::Serialize)]
+    struct Unit {
+        id: i64,
+        name: String,
+        short: String,
+    }
+
+    async fn list(State(state): State<Arc<SharedState>>) -> axum::response::Json<Vec<Unit>> {
+        let result: Result<Vec<(i64, String, String)>, _> = sqlx::query_as("SELECT id, name, short FROM units").fetch_all(&state.db).await;
+        tracing::debug!(?result, "Query Result");
+
+        let result = result.unwrap();
+
+        axum::response::Json(result.into_iter().map(|row| Unit {
+            id: row.0,
+            name: row.1,
+            short: row.2,
+        }).collect())
+    }
+
+    #[derive(Debug, serde::Deserialize)]
+    struct AddUnitData {
+        name: String,
+        short: String,
+    }
+
+    async fn add(State(state): State<Arc<SharedState>>, axum::extract::Json(data): axum::extract::Json<AddUnitData>) -> String {
+        let result: Result<sqlx::postgres::PgQueryResult, sqlx::Error> = sqlx::query("INSERT INTO units(name, short) VALUES($1, $2)")
+            .bind(data.name)
+            .bind(data.short)
+            .execute(&state.db)
+            .await;
+
+        let result = result.unwrap();
+        tracing::debug!(?result, "Query Result");
+
+        String::new()
+    }
+}
+
+mod food {
+    use super::SharedState;
+    use std::sync::Arc;
+
+    use sqlx::Row;
+    use axum::extract::State;
+
+    pub fn router() -> axum::Router<Arc<SharedState>> {
+        axum::Router::new()
+            .route("/list", axum::routing::get(list_food))
+            .route("/create", axum::routing::post(create_food))
+    }
+
+    #[derive(Debug, serde::Serialize)]
+    struct Food {
+        id: i64,
+        version: i64,
+        name: String,
+    }
+
+    #[tracing::instrument(skip(state))]
+    async fn list_food(State(state): State<Arc<SharedState>>) -> axum::response::Json<Vec<Food>> {
+        tracing::debug!("List Food");
+
+        let result: Result<Vec<(i64, i64, String)>, _> =
+            sqlx::query_as("SELECT food.id, food.version, food.name FROM food")
+                .fetch_all(&state.db)
+                .await;
+        tracing::debug!(?result, "Query Result");
+
+        let result = result.unwrap();
+
+        axum::response::Json(
+            result
+                .into_iter()
+                .map(|row| Food {
+                    id: row.0,
+                    version: row.1,
+                    name: row.2,
+                })
+                .collect(),
+        )
+    }
+
+    #[derive(Debug, serde::Deserialize)]
+    struct FoodCreateReqData {
+        name: String,
+        unit_id: i64,
+        base: Vec<FoodCreateReqDataBase>
+    }
+
+    #[derive(Debug, serde::Deserialize)]
+    struct FoodCreateReqDataBase  {
+        nutrition_id: i64,
+        quantity: f32,
+    }
+
+    #[tracing::instrument(skip(state))]
+    async fn create_food(
+        State(state): State<Arc<SharedState>>,
+        axum::extract::Json(create_req): axum::extract::Json<FoodCreateReqData>,
+    ) -> String {
+        tracing::debug!("Creating Food");
+
+        let version = 0;
+        let name = create_req.name;
+        let unit_id = create_req.unit_id;
+
+        let mut transaction = state.db.begin().await.unwrap();
+
+        let result: Result<sqlx::postgres::PgRow, sqlx::Error> = sqlx::query("INSERT INTO food(version, name, unit_id) VALUES($1, $2, $3) RETURNING id")
+            .bind(version)
+            .bind(name)
+            .bind(unit_id)
+            .fetch_one(&mut *transaction)
+            .await;
+        tracing::debug!(?result, "Query Result");
+
+        let result = result.unwrap();
+        let inserted_id: i64 = result.get("id");
+        tracing::debug!(?inserted_id, "Inserted item");
+
+        for base_n in create_req.base {
+            tracing::debug!(?base_n, "Creating base nutrition entry");
+
+            let result = sqlx::query("INSERT INTO food_base(food_id, kind_id, value) VALUES($1, $2, $3)")
+                .bind(inserted_id)
+                .bind(base_n.nutrition_id)
+                .bind(base_n.quantity)
+                .execute(&mut *transaction)
+                .await;
+            tracing::debug!(?result, "Query Result");
+        }
+
+        transaction.commit().await.unwrap();
+
+        String::new()
+    }
+}
+
+mod nutrition {
+    use super::SharedState;
+    use std::sync::Arc;
+
+    use axum::extract::State;
+
+    pub fn router() -> axum::Router<Arc<SharedState>> {
+        axum::Router::new()
+            .route("/list", axum::routing::get(list_nutritional_kind))
+            .route("/create", axum::routing::post(create_nutritional_kind))
+    }
+
+    #[derive(Debug, serde::Serialize)]
+    struct NutritionalKind {
+        id: i64,
+        name: String,
+        unit_id: i64,
+        unit_name: String,
+    }
+
+    #[tracing::instrument(skip(state))]
+    async fn list_nutritional_kind(State(state): State<Arc<SharedState>>) -> axum::response::Json<Vec<NutritionalKind>> {
+        tracing::debug!("Listing NutritionalKinds");
+
+        let result: Result<Vec<(i64, String, i64, String)>, _> =
+            sqlx::query_as("SELECT NK.id, NK.name, U.id, U.name FROM nutritional_kind NK INNER JOIN units U ON NK.unit_id = U.id")
+                .fetch_all(&state.db)
+                .await;
+        tracing::debug!(?result, "Query Result");
+
+        let result = result.unwrap();
+
+        axum::response::Json(result.into_iter().map(|row| {
+            NutritionalKind {
+                id: row.0,
+                name: row.1,
+                unit_id: row.2,
+                unit_name: row.3
+            }
+        }).collect())
+    }
+
+    #[derive(Debug, serde::Deserialize)]
+    struct NutritionalKindCreateReqData {
+        name: String,
+        unit_id: i64,
+    }
+
+    #[tracing::instrument(skip(state))]
+    async fn create_nutritional_kind(
+        State(state): State<Arc<SharedState>>,
+        axum::extract::Json(create_req): axum::extract::Json<NutritionalKindCreateReqData>,
+    ) -> String {
+        tracing::debug!("Creating NutritionalKind");
+
+        let result = sqlx::query("INSERT INTO nutritional_kind(name, unit_id) VALUES($1, $2)")
+            .bind(create_req.name)
+            .bind(create_req.unit_id)
+            .execute(&state.db)
+            .await;
+        tracing::debug!(?result, "Query Result");
+
+        String::new()
+    }
+}
+
+mod tracking {
+    use super::SharedState;
+    use std::sync::Arc;
+
+    use axum::extract::State;
+
+    pub fn router() -> axum::Router<Arc<SharedState>> {
+        axum::Router::new()
+            .route("/list", axum::routing::get(list_entries))
+            .route("/add", axum::routing::post(add_tracking))
+    }
+
+    #[derive(Debug, serde::Serialize)]
+    struct TrackingEntry {
+        id: i64,
+        food_id: i64,
+        food_name: String,
+        unit_id: i64,
+        unit_short: String,
+        quantity: f64,
+        timestamp: i64,
+    }
+
+    #[tracing::instrument(skip(state))]
+    async fn list_entries(State(state): State<Arc<SharedState>>) -> axum::response::Json<Vec<TrackingEntry>> {
+        tracing::debug!("Listing Tracking Entries");
+
+        let result: Result<Vec<(i64, i64, String, i64, String, f64, i64)>, _> =
+            sqlx::query_as("
+                SELECT T.id, T.food_id, F.name, U.id, U.short, T.quantity, T.ts
+                FROM tracking T
+                INNER JOIN food F ON T.food_id = F.id
+                INNER JOIN units U ON F.unit_id = U.id
+            ")
+                .fetch_all(&state.db)
+                .await;
+        tracing::debug!(?result, "Query Result");
+
+        let result = result.unwrap();
+
+        axum::response::Json(result.into_iter().map(|row| {
+            TrackingEntry {
+                id: row.0,
+                food_id: row.1,
+                food_name: row.2,
+                unit_id: row.3,
+                unit_short: row.4,
+                quantity: row.5,
+                timestamp: row.6
+            }
+        }).collect())
+    }
+
+    #[derive(Debug, serde::Deserialize)]
+    struct AddReqData {
+        food_id: i64,
+        quantity: f64,
+        timestamp: i64,
+    }
+    
+    #[tracing::instrument(skip(state))]
+    async fn add_tracking(
+        State(state): State<Arc<SharedState>>,
+        axum::extract::Json(data): axum::extract::Json<AddReqData>
+    ) -> String {
+        tracing::debug!("Creating NutritionalKind");
+
+        let result = sqlx::query("INSERT INTO tracking(food_id, quantity, ts) VALUES($1, $2, $3)")
+            .bind(data.food_id)
+            .bind(data.quantity)
+            .bind(data.timestamp)
+            .execute(&state.db)
+            .await;
+        tracing::debug!(?result, "Query Result");
+
+        String::new()
+    }
+}

backend/src/main.rs

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+use tracing_subscriber::layer::SubscriberExt;
+
+fn main() {
+    let tracing_reg =
+        tracing_subscriber::Registry::default().with(tracing_subscriber::fmt::layer());
+    tracing::subscriber::set_global_default(tracing_reg).unwrap();
+
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()
+        .unwrap();
+
+    rt.block_on(async move {
+        let pool = sqlx::postgres::PgPoolOptions::new()
+            .max_connections(5)
+            .connect("postgres://postgres:testing@localhost/test")
+            .await
+            .unwrap();
+
+        sqlx::migrate!().run(&pool).await.unwrap();
+
+        let router = backend::app(pool);
+
+        let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
+
+        axum::serve(listener, router).await.unwrap();
+    });
+}

docker-compose.yml

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+services:
+  pg:
+    pull_policy: never
+    image: postgres:18
+    environment:
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "testing"
+      POSTGRES_DB: "test"
+    ports:
+      - 5432:5432
+
+  frontend:
+    pull_policy: never
+    image: node:25
+    network_mode: host
+    entrypoint: /bin/bash
+    command: "-c 'cd /mnt/calflow/frontend; npm install; npm run dev -- --host'"
+    volumes:
+      - ./:/mnt/calflow
+

example-requests/create_food.json

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+{
+  "name": "something"
+}

example-requests/create_nutrition.json

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+{
+  "name": "Calories",
+  "unit": "kcal"
+}

frontend/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

frontend/README.md

@@ -0,0 +1,73 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```

frontend/eslint.config.js

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+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])

frontend/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>frontend</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

frontend/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.9.6"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@types/node": "^24.10.1",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.46.4",
+    "vite": "^7.2.4"
+  }
+}

frontend/public/vite.svg

@@ -0,0 +1 @@
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frontend/src/App.css

@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}

frontend/src/App.tsx

@@ -0,0 +1,27 @@
+import './App.css'
+import { BrowserRouter, NavLink, Route, Routes } from 'react-router-dom';
+import Homepage from './pages/homepage';
+import Settings from './pages/settings';
+import Food from './pages/food';
+
+function App() {
+  return (
+    <>
+      <BrowserRouter>
+        <nav>
+          <NavLink to="/">Homepage</NavLink>
+          <NavLink to="/food">Food</NavLink>
+          <NavLink to="/settings">Settings</NavLink>
+        </nav>
+
+        <Routes>
+          <Route path="/" element={<Homepage />} />
+          <Route path="/food" element={<Food />} />
+          <Route path="/settings" element={<Settings />} />
+        </Routes>
+      </BrowserRouter>
+    </>
+  )
+}
+
+export default App

frontend/src/api.ts

@@ -0,0 +1,77 @@
+export async function loadNutritionalKinds() {
+  let resp = await fetch("/api/nutrition/list");
+  let content = await resp.json();
+  return content;
+}
+
+export async function addNutrition(name: string, unit_id: number) {
+  return await fetch("/api/nutrition/create", {
+    method: 'post',
+    headers: new Headers({
+      'Content-type': 'application/json',
+    }),
+    body: JSON.stringify({
+      name: name,
+      unit_id: unit_id,
+    })
+  })
+}
+
+export async function loadFoodItems() {
+  let resp = await fetch("/api/food/list");
+  let content = await resp.json();
+  return content;
+}
+
+export async function addFoodItem(name: string, unit_id: number, base: Array<{nutrition_id: number, quantity: number}>) {
+  return await fetch("/api/food/create", {
+    method: 'post',
+    headers: new Headers({
+      'Content-type': 'application/json',
+    }),
+    body: JSON.stringify({
+      name: name,
+      unit_id: unit_id,
+      base: base,
+    }),
+  });
+}
+
+export async function loadUnits() {
+  let resp = await fetch("/api/units/list");
+  let content = await resp.json();
+  return content;
+}
+
+export async function addUnit(name: string, short: string) {
+  return await fetch("/api/units/create", {
+    method: 'post',
+    headers: new Headers({
+      'Content-type': 'application/json',
+    }),
+    body: JSON.stringify({
+      name: name,
+      short: short,
+    }),
+  });
+}
+
+export async function getTrackingEntries() {
+  let resp = await fetch("/api/tracking/list");
+  let content = await resp.json();
+  return content;
+}
+
+export async function trackFood(food_id: number, quantity: number, timestamp: number) {
+  return await fetch("/api/tracking/add", {
+    method: 'post',
+    headers: new Headers({
+      'Content-type': 'application/json',
+    }),
+    body: JSON.stringify({
+      food_id: food_id,
+      quantity: quantity,
+      timestamp: timestamp,
+    }),
+  });
+}

frontend/src/assets/react.svg

@@ -0,0 +1 @@
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frontend/src/components/settings/nutrition.tsx

@@ -0,0 +1,68 @@
+import { useEffect, useState } from "react";
+import { addNutrition, loadNutritionalKinds, loadUnits } from "../../api";
+
+export default function Nutrition() {
+  const [nutritionKinds, setNutritionKinds] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadNutritionalKinds().then((kinds) => {
+      setNutritionKinds(kinds);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const [units, setUnits] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadUnits().then((kinds) => {
+      setUnits(kinds);
+      if (kinds.length > 0) {
+        setAddUnit(kinds[0].id);
+      }
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const [addUnit, setAddUnit] = useState(0);
+  const [addName, setAddName] = useState("");
+  const submitNutrition = () => {
+    addNutrition(addName, addUnit)
+      .then(() => {
+        return loadNutritionalKinds();
+      })
+      .then((kinds) => {
+        setNutritionKinds(kinds);
+      })
+  };
+
+  return (
+    <div>
+      <h2>Nutrition</h2>
+      <ul>
+        {
+          nutritionKinds
+          .map((entry) => <li key={entry.id}>{entry.name} ({entry.unit_name})</li>)
+        }
+      </ul>
+      <div>
+        <input type="text" value={addName} onChange={(e) => setAddName(e.target.value)}/>
+        <select value={addUnit} onChange={(e) => setAddUnit(Number(e.target.value))}>
+          {
+            units.map((entry) => {
+              return <option value={entry.id} key={entry.id}>{entry.name} ({entry.short})</option>
+            })
+          }
+        </select>
+        <button onClick={(e) => {submitNutrition()}}>Add</button>
+      </div>
+    </div>
+  )
+}

frontend/src/components/settings/units.tsx

@@ -0,0 +1,46 @@
+import { useEffect, useState } from "react";
+import { addUnit, loadUnits } from "../../api";
+
+
+export default function Units() {
+  const [units, setUnits] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadUnits().then((kinds) => {
+      setUnits(kinds);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const submitUnit = (formData: FormData) => {
+    const name = formData.get("name");
+    const short = formData.get("short");
+
+    addUnit(name, short).then(() => {
+      console.log("Added unit");
+      // TODO
+      // Reload the page/list of units
+    });
+  };
+
+  return (
+    <div>
+      <h2>Units</h2>
+      <ul>
+        {
+          units
+          .map((entry) => <li key={entry.id}>{entry.name} ({entry.short})</li>)
+        }
+      </ul>
+      <form action={submitUnit}>
+        <input name="name" placeholder="Name" />
+        <input name="short" placeholder="Short" />
+        <button type="submit">Add</button>
+      </form>
+    </div>
+  )
+}

frontend/src/index.css

@@ -0,0 +1,68 @@
+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}

frontend/src/main.tsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)

frontend/src/pages/food.tsx

@@ -0,0 +1,194 @@
+import { useEffect, useRef, useState } from "react";
+import { addFoodItem, loadFoodItems, loadNutritionalKinds, loadUnits } from "../api";
+
+function FoodList({ foodItems }: {foodItems: Array<any> }) {
+  return (
+    <div>
+      <h2>Registered Food Items</h2>
+      <ul>
+        {
+          foodItems.map((entry) => <li key={entry.id}>{entry.name}</li>)
+        }
+      </ul>
+    </div>
+  )
+}
+
+function AddNutrition({ nutritionKinds, onAdd }: { nutritionKinds: Array<any>, onAdd: any }) {
+  const add = (formData) => {
+    const nutrition = Number(formData.get("nutrition"));
+    const quantity = Number(formData.get("quantity"));
+
+    const added_nutri = nutritionKinds.find((entry) => entry.id == nutrition);
+    onAdd({
+      nutrition_name: added_nutri.name,
+      nutrition_id: nutrition,
+      quantity: quantity,
+      unit_name: added_nutri.unit_name
+    })
+  };
+
+  return (
+    <form action={add}>
+      <select name="nutrition">
+        {
+          nutritionKinds.map((entry) => {
+            return <option value={entry.id} key={entry.id}>{entry.name} ({entry.unit_name})</option>
+          })
+        }
+      </select>
+      <input type="number" name="quantity" />
+      <button type="submit">+</button>
+    </form>
+  )
+}
+
+function AddFoodIngridient({ foods }: { foods: Array<any> }) {
+  const add = (formData: FormData) => {
+    const food_id = Number(formData.get("food"));
+    const quantity = Number(formData.get("quantity"));
+
+    console.log("[TODO] Adding Food", food_id, quantity);
+  };
+
+  return (
+    <form action={add}>
+      <select name="food">
+        {
+          foods.map((entry) => {
+            return <option value={entry.id} key={entry.id}>{entry.name}</option>
+          })
+        }
+      </select>
+      <input type="number" name="quantity" placeholder="10g" />
+      <button type="submit">+</button>
+    </form>
+  )
+}
+
+function AddFoodItem({ units, nutritionKinds, foods, onAdd }: { units: Array<any>, nutritionKinds: Array<any>, foods: Array<any>, onAdd: any }) {
+  const [addState, setAddState] = useState({
+    nutritions: [],
+  });
+
+  const submitFood = (formData: FormData) => {
+    const name = formData.get("name");
+    const unit_id = Number(formData.get("unit"));
+    const per_unit = Number(formData.get("per_unit"));
+
+    const nutritions = addState.nutritions.map((entry) => {
+      return {
+        nutrition_id: entry.nutrition_id,
+        quantity: entry.quantity / per_unit
+      }
+    });
+
+    addFoodItem(name, unit_id, nutritions)
+      .then(() => {
+        setAddState({
+          unit: 0,
+          name: "",
+          nutritions: [],
+        });
+        onAdd()
+      });
+  };
+
+  let formRef = useRef(null);
+
+  return (
+    <div>
+      <h2>Add Food</h2>
+      <form action={submitFood} ref={formRef}>
+        <input name="name" placeholder="Name" />
+        <input name="per_unit" type="number" placeholder="Per Unit" />
+        <select name="unit">
+          {
+            units.map((entry) => {
+              return <option value={entry.id} key={entry.id}>{entry.name} ({entry.short})</option>
+            })
+          }
+        </select>
+        <ul>
+          {
+            addState.nutritions.map((entry) => {
+              return (<li key={entry.nutrition_id}>{entry.nutrition_name} - {entry.quantity} {entry.unit_name}</li>)
+            })
+          }
+        </ul>
+      </form>
+
+      <div>
+        <p>Base Nutrition</p>
+        <AddNutrition nutritionKinds={nutritionKinds} onAdd={(entry) => {
+          setAddState({...addState, nutritions: [...addState.nutritions, entry]})
+        }} />
+      </div>
+
+      <div>
+        <p>Ingridients</p>
+        <AddFoodIngridient foods={foods} />
+      </div>
+
+      <button onClick={(e) => {
+        formRef.current.dispatchEvent(new Event("submit", { cancelable: true, bubbles: true }));
+      }}>Add Food</button>
+    </div>
+  )
+}
+
+export default function Food() {
+  const [foodItems, setFoodItems] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadFoodItems().then((resp) => {
+        setFoodItems(resp);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const [nutritionKinds, setNutritionKinds] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadNutritionalKinds().then((kinds) => {
+      setNutritionKinds(kinds);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+  
+  const [units, setUnits] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadUnits().then((kinds) => {
+      setUnits(kinds);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const reloadFood = () => {
+    loadFoodItems().then((resp) => {
+      setFoodItems(resp);
+      console.log(resp);
+    });
+  };
+
+  return (
+    <>
+      <h1>Food</h1>
+      <FoodList foodItems={foodItems} />
+      <AddFoodItem units={units} nutritionKinds={nutritionKinds} foods={foodItems} onAdd={reloadFood} />
+    </>
+  )
+}

frontend/src/pages/homepage.tsx

@@ -0,0 +1,87 @@
+import { useEffect, useEffectEvent, useState } from 'react'
+import '../App.css'
+import { getTrackingEntries, loadFoodItems, loadNutritionalKinds, trackFood } from '../api';
+
+function Homepage() {
+  const [foodItems, setFoodItems] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadFoodItems().then((resp) => {
+        setFoodItems(resp);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const [nutritionKinds, setNutritionKinds] = useState([]);
+  useEffect(() => {
+    let ignore = false;
+
+    loadNutritionalKinds().then((kinds) => {
+      setNutritionKinds(kinds);
+    })
+
+    return () => {
+      ignore = true;
+    };
+  }, []);
+
+  const [trackingEntries, setTrackingEntries] = useState([]);
+  useEffect(() => {
+    getTrackingEntries().then((entries) => {
+      console.log(entries);
+      setTrackingEntries(entries);
+    });
+
+    return () => {};
+  }, []);
+
+  const submitFoodTracking = (formData: FormData) => {
+    console.log("Track food");
+
+    const food_id = Number(formData.get("food"));
+    const quantity = Number(formData.get("quantity"));
+    const timestamp = Math.floor(Date.now() / 1000);
+    
+    console.log("Track food", food_id, quantity, timestamp);
+
+    trackFood(food_id, quantity, timestamp).then(() => {
+      console.log("Tracked food")
+    });
+  };
+
+  return (
+    <>
+      <h1>CalFlow</h1>
+      <p className="read-the-docs">
+        Click on the Vite and React logos to learn more
+      </p>
+
+      <form action={submitFoodTracking}>
+        <select name="food">
+          {
+            foodItems.map((entry) => {
+              return <option value={entry.id} key={entry.id}>{entry.name}</option>
+            })
+          }
+        </select>
+        <input name="quantity" type="number" placeholder="Quantity" />
+        <button type="submit">Track Now</button>
+      </form>
+
+      <ul>
+        {
+          trackingEntries.map((entry) => {
+            const date = new Date(entry.timestamp * 1000);
+            return <li key={entry.id}>[{date.toLocaleString()}] {entry.food_name} ({entry.quantity} {entry.unit_short})</li>
+          })
+        }
+      </ul>
+    </>
+  )
+}
+
+export default Homepage

frontend/src/pages/settings.tsx

@@ -0,0 +1,12 @@
+import Nutrition from "../components/settings/nutrition";
+import Units from "../components/settings/units";
+
+export default function Settings() {
+  return (
+    <>
+      <h1>Settings</h1>
+      <Units />
+      <Nutrition />
+    </>
+  )
+}

frontend/tsconfig.app.json

@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}

frontend/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}

frontend/tsconfig.node.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}

frontend/vite.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    proxy: {
+      '/api': {
+        target: 'http://localhost:3000',
+        changeOrigin: true,
+        rewrite: (path) => path.replace(/^\/api/, ''),
+      },
+    }
+  },
+})