From 4a2f82f06490b7fb277dc6c7558d10c34503a495 Mon Sep 17 00:00:00 2001
From: Pinapelz <yukais@pinapelz.com>
Date: Wed, 3 Jun 2026 01:38:53 -0700
Subject: add basic daily answer encryption

---
 .github/actions/build/action.yml     | 18 -------------
 .github/workflows/build_website.yml  | 13 ---------
 .github/workflows/deploy_website.yml | 40 ---------------------------
 .husky/commit-msg                    |  4 ---
 server/index.ts                      | 51 +++++++++++++++++++++++++++++++++++
 src/app.tsx                          | 15 ++++++++---
 src/components/Footer/index.tsx      |  9 ++-----
 src/constants/index.ts               |  2 +-
 src/data/songs.ts                    |  4 +++
 src/helpers/fetchSolution.ts         | 52 ++++++++++++++++++++++++++++++++++++
 src/helpers/fetchSongs.ts            | 51 +++++++++++++++++++++++++++++++++++
 11 files changed, 172 insertions(+), 87 deletions(-)
 delete mode 100644 .github/actions/build/action.yml
 delete mode 100644 .github/workflows/build_website.yml
 delete mode 100644 .github/workflows/deploy_website.yml
 delete mode 100644 .husky/commit-msg
 create mode 100644 server/index.ts
 create mode 100644 src/data/songs.ts
 create mode 100644 src/helpers/fetchSolution.ts
 create mode 100644 src/helpers/fetchSongs.ts

diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
deleted file mode 100644
index e4e161f..0000000
--- a/.github/actions/build/action.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: Build Website
-runs:
-  using: "composite"
-  steps:
-    - name: Enable Corepack
-      shell: bash
-      run: corepack enable
-    - name: Set Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: 20.x
-        cache: 'yarn'
-    - name: Install dependencies
-      shell: bash
-      run: yarn install --immutable
-    - name: Run build
-      shell: bash
-      run: yarn build
diff --git a/.github/workflows/build_website.yml b/.github/workflows/build_website.yml
deleted file mode 100644
index 56a2200..0000000
--- a/.github/workflows/build_website.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: Build Website
-
-on:
-  pull_request:
-    branches: [ "master" ]
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/actions/build
diff --git a/.github/workflows/deploy_website.yml b/.github/workflows/deploy_website.yml
deleted file mode 100644
index 7c0557e..0000000
--- a/.github/workflows/deploy_website.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-# Simple workflow for deploying static content to GitHub Pages
-name: Deploy Website
-
-on:
-  # Runs on pushes targeting the default branch
-  push:
-    branches: ["master"]
-
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
-# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
-jobs:
-  # Single deploy job since we're just deploying
-  deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/actions/build
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          path: './build'
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4
diff --git a/.husky/commit-msg b/.husky/commit-msg
deleted file mode 100644
index 617efbd..0000000
--- a/.husky/commit-msg
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
-npx --no-install commitlint --edit 
diff --git a/server/index.ts b/server/index.ts
new file mode 100644
index 0000000..bf4cafd
--- /dev/null
+++ b/server/index.ts
@@ -0,0 +1,51 @@
+import express from 'express';
+import path from 'path';
+import crypto from 'crypto';
+import { songs } from '../src/data/songs';
+import { startDate } from '../src/constants/startDate';
+import cors from 'cors';
+
+
+const app = express();
+app.use(cors());
+app.use(express.json());
+
+const PORT = process.env.PORT || 3001;
+const SALT = process.env.HEARDLE_SALT ?? 'changeme';
+
+function getDailyKey(): Buffer {
+  const date = new Date().toISOString().split('T')[0];
+  return crypto.pbkdf2Sync(date, SALT, 100_000, 32, 'sha256');
+}
+
+app.get('/today', (_req, res) => {
+  const msInDay = 86_400_000;
+  const index = Math.floor((Date.now() - startDate.getTime()) / msInDay);
+  const song = songs[index % songs.length];
+
+  const key = getDailyKey();
+  const iv = crypto.randomBytes(12);
+  const cipher = crypto.createCipheriv('aes-256-gcm', key, iv);
+  const encrypted = Buffer.concat([
+    cipher.update(JSON.stringify(song), 'utf8'),
+    cipher.final(),
+  ]);
+  res.json({
+    iv: iv.toString('hex'),
+    tag: cipher.getAuthTag().toString('hex'),
+    data: encrypted.toString('hex'),
+  });
+});
+
+app.get('/songs', (_req, res) => {
+  res.json(songs.map(({ artist, name }) => ({ artist, name })));
+});
+
+if (process.env.NODE_ENV === 'production') {
+  app.use(express.static(path.join(__dirname, '../build')));
+  app.get('*', (_req, res) => {
+    res.sendFile(path.join(__dirname, '../build', 'index.html'));
+  });
+}
+
+app.listen(PORT, () => console.log(`Server running on :${PORT}`));
diff --git a/src/app.tsx b/src/app.tsx
index 7c4c81d..4eeccc8 100644
--- a/src/app.tsx
+++ b/src/app.tsx
@@ -3,8 +3,8 @@ import _ from "lodash";
 
 import { Song } from "./types/song";
 import { GuessState, GuessType } from "./types/guess";
+import { getDailySolution } from "./helpers/fetchSolution";
 
-import { todaysSolution } from "./helpers";
 
 import { Header, InfoPopUp, Game, Footer } from "./components";
 
@@ -22,6 +22,7 @@ function App() {
   const [currentTry, setCurrentTry] = React.useState<number>(0);
   const [selectedSong, setSelectedSong] = React.useState<Song>();
   const [didGuess, setDidGuess] = React.useState<boolean>(false);
+  const [todaysSolution, setTodaysSolution] = React.useState<Song | null>(null);
 
   const firstRun = localStorage.getItem("firstRun") === null;
 
@@ -58,6 +59,10 @@ function App() {
   let stats = JSON.parse(localStorage.getItem("stats") || "{}");
   let statsVersion = JSON.parse(localStorage.getItem("version") || "1");
 
+  React.useEffect(() => {
+    getDailySolution().then(solution => setTodaysSolution(solution));
+  }, []);
+
   React.useEffect(() => {
     if (Array.isArray(stats)) {
       const visitedToday = _.isEqual(
@@ -78,8 +83,6 @@ function App() {
         setDidGuess(didGuess);
       }
     } else {
-      // initialize stats
-      // useEffect below does rest
       stats = [];
       stats.push({
         solution: todaysSolution,
@@ -168,7 +171,7 @@ function App() {
     let state = GuessState.Incorrect;
     if (selectedSong === todaysSolution) {
       state = GuessState.Correct;
-    } else if (selectedSong?.artist === todaysSolution.artist) {
+    } else if (selectedSong?.artist === todaysSolution?.artist) {
       state = GuessState.PartiallyCorrect
     }
 
@@ -195,6 +198,10 @@ function App() {
     }
   }, [guesses, selectedSong]);
 
+  if (todaysSolution === null) {
+    return null;
+  }
+
   return (
     <main>
       <Header openInfoPopUp={openInfoPopUp} />
diff --git a/src/components/Footer/index.tsx b/src/components/Footer/index.tsx
index e2747c3..3ba4c7c 100644
--- a/src/components/Footer/index.tsx
+++ b/src/components/Footer/index.tsx
@@ -20,13 +20,8 @@ export function Footer() {
   return (
     <footer>
       <Styled.Text>
-        Made with <IoHeart /> by{" "}
-        <Styled.Link href="https://epicwolverine.com">
-          EpicWolverine
-        </Styled.Link>
-        {" "}based on the work of{" "}
-        <Styled.Link href="https://twitter.com/synowski_maciej">
-          Maciej Synowski
+        <Styled.Link href="">
+          Source Code
         </Styled.Link>
       </Styled.Text>
       {showDebugButton &&
diff --git a/src/constants/index.ts b/src/constants/index.ts
index bf50a38..9d6bd5f 100644
--- a/src/constants/index.ts
+++ b/src/constants/index.ts
@@ -1,5 +1,5 @@
 export { appName } from "./appName";
 export { playTimes } from "./playTimes";
-export { songs } from "./songs";
+export { songs } from "../data/songs";
 export { startDate } from "./startDate";
 export { theme } from "./theme";
diff --git a/src/data/songs.ts b/src/data/songs.ts
new file mode 100644
index 0000000..7b760b2
--- /dev/null
+++ b/src/data/songs.ts
@@ -0,0 +1,4 @@
+export const songs = [
+  { artist: "KiiiKiii", name: "Strawberry Cheesegame", youtubeId: "CQSY6FeT68I" },
+  { artist: "ifeye", name: "r u ok?", youtubeId: "tEF6aKhfPaQ" },
+];
diff --git a/src/helpers/fetchSolution.ts b/src/helpers/fetchSolution.ts
new file mode 100644
index 0000000..b43722a
--- /dev/null
+++ b/src/helpers/fetchSolution.ts
@@ -0,0 +1,52 @@
+import { Song } from "../types/song";
+
+const SALT = process.env.HEARDLE_SALT ?? 'changeme';
+const API_URL = process.env.HEARDLE_API_URL ?? 'http://localhost:3001';
+
+function hexToBytes(hex: string): Uint8Array {
+  const bytes = new Uint8Array(hex.length / 2);
+  for (let i = 0; i < hex.length; i += 2) {
+    bytes[i / 2] = parseInt(hex.slice(i, i + 2), 16);
+  }
+  return bytes;
+}
+
+
+async function getDailyKey(): Promise<CryptoKey> {
+  const enc = new TextEncoder();
+  const date = new Date().toISOString().split('T')[0];
+  const keyMaterial = await crypto.subtle.importKey(
+    'raw',
+    enc.encode(date),
+    'PBKDF2',
+    false,
+    ['deriveKey'],
+  );
+  return crypto.subtle.deriveKey(
+    { name: 'PBKDF2', salt: enc.encode(SALT), iterations: 100_000, hash: 'SHA-256' },
+    keyMaterial,
+    { name: 'AES-GCM', length: 256 },
+    false,
+    ['decrypt'],
+  );
+}
+
+export async function getDailySolution(): Promise<Song> {
+  const solutionData = await fetch(`${API_URL}/today`);
+  if (!solutionData.ok) {
+    throw new Error(`Failed to fetch solution: ${solutionData.statusText}`);
+  }
+  const { iv, tag, data } = await solutionData.json();
+  const key = await getDailyKey();
+  const ciphertext = hexToBytes(data);
+  const authTag = hexToBytes(tag);
+  const combined = new Uint8Array(ciphertext.length + authTag.length);
+  combined.set(ciphertext);
+  combined.set(authTag, ciphertext.length);
+  const decrypted = await crypto.subtle.decrypt(
+    { name: 'AES-GCM', iv: hexToBytes(iv) },
+    key,
+    combined,
+  );
+  return JSON.parse(new TextDecoder().decode(decrypted)) as Song;
+}
diff --git a/src/helpers/fetchSongs.ts b/src/helpers/fetchSongs.ts
new file mode 100644
index 0000000..5ae0d83
--- /dev/null
+++ b/src/helpers/fetchSongs.ts
@@ -0,0 +1,51 @@
+import { Song } from "../types/song";
+let cachedSongs: Song[] | null = null;
+function fuzzyMatch(input: string): string {
+  return input.toLowerCase().replace(/[^0-9a-z ]/gi, '');
+}
+
+
+export async function fetchSongs(useCache=true): Promise<Song[]> {
+  if (useCache && cachedSongs) {
+    return cachedSongs;
+  }
+
+  try {
+    const response = await fetch('/songs');
+    if (!response.ok) {
+      throw new Error(`HTTP error! status: ${response.status}`);
+    }
+    const songsData: Song[] = await response.json();
+    cachedSongs = songsData;
+    return songsData;
+  } catch (error) {
+    console.error("Failed to fetch songs:", error);
+    throw error;
+  }
+}
+
+export async function searchSongs(searchTerm: string): Promise<Song[]> {
+  const songsToSearch = await fetchSongs();
+
+  const processedSearchTerm = fuzzyMatch(searchTerm);
+
+  const matchingSongs = songsToSearch
+    .filter((song: Song) => {
+      const songName = fuzzyMatch(song.name);
+      const songArtist = fuzzyMatch(song.artist);
+
+      if (songArtist.includes(processedSearchTerm) || songName.includes(processedSearchTerm)) {
+        return true;
+      }
+      return false;
+    })
+    .sort((a, b) =>
+      a.artist.toLowerCase().localeCompare(b.artist.toLocaleLowerCase())
+       || a.name.toLowerCase().localeCompare(b.name.toLocaleLowerCase())
+    );
+
+  return matchingSongs;
+}
+export function getCachedSongs(): Song[] | null {
+  return cachedSongs;
+}
-- 
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