feat(frontend): add basic frontend

This commit is contained in:
2025-12-26 20:14:30 +03:00
parent 262c42c1b3
commit 707a474ef3
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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?

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/home/mikhail/repos/sound-analizer/services/api/.gitignore

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# 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...
},
},
])
```

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{
"$schema": "https://ui.shadcn.com/schema.json",
"style": "new-york",
"rsc": false,
"tsx": true,
"tailwind": {
"config": "tailwind.config.js",
"css": "src/index.css",
"baseColor": "slate",
"cssVariables": true,
"prefix": ""
},
"iconLibrary": "lucide",
"aliases": {
"components": "@/components",
"utils": "@/lib/utils",
"ui": "@/components/ui",
"lib": "@/lib",
"hooks": "@/hooks"
},
"registries": {}
}

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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,
},
},
])

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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>

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{
"name": "frontend",
"private": true,
"version": "0.0.0",
"type": "module",
"scripts": {
"dev": "vite",
"build": "tsc -b && vite build",
"lint": "eslint .",
"preview": "vite preview"
},
"dependencies": {
"@radix-ui/react-slot": "^1.2.4",
"class-variance-authority": "^0.7.1",
"clsx": "^2.1.1",
"lucide-react": "^0.562.0",
"react": "^19.2.0",
"react-dom": "^19.2.0",
"recharts": "^3.6.0",
"tailwind-merge": "^3.4.0",
"tailwindcss-animate": "^1.0.7",
"zustand": "^5.0.9"
},
"devDependencies": {
"@eslint/js": "^9.39.1",
"@tailwindcss/vite": "^4.1.18",
"@types/node": "^24.10.4",
"@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",
"tailwindcss": "^4.1.18",
"tw-animate-css": "^1.4.0",
"typescript": "~5.9.3",
"typescript-eslint": "^8.46.4",
"vite": "npm:rolldown-vite@7.2.5"
},
"overrides": {
"vite": "npm:rolldown-vite@7.2.5"
}
}

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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

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import { DashboardPage } from "../pages/dashboard/ui/DashboardPage";
export function App() {
return (
<div className="min-h-screen bg-background text-foreground">
<DashboardPage />
</div>
);
}

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import type { PropsWithChildren } from "react";
export function WithLiveStream({ children }: PropsWithChildren) {
// placeholder for future providers
// theme, router, query-client, etc.
return children;
}

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@import "tailwindcss";
@plugin "tailwindcss-animate";
@import "tw-animate-css";
@custom-variant dark (&:is(.dark *));
@theme inline {
--radius-sm: calc(var(--radius) - 4px);
--radius-md: calc(var(--radius) - 2px);
--radius-lg: var(--radius);
--radius-xl: calc(var(--radius) + 4px);
--radius-2xl: calc(var(--radius) + 8px);
--radius-3xl: calc(var(--radius) + 12px);
--radius-4xl: calc(var(--radius) + 16px);
--color-background: var(--background);
--color-foreground: var(--foreground);
--color-card: var(--card);
--color-card-foreground: var(--card-foreground);
--color-popover: var(--popover);
--color-popover-foreground: var(--popover-foreground);
--color-primary: var(--primary);
--color-primary-foreground: var(--primary-foreground);
--color-secondary: var(--secondary);
--color-secondary-foreground: var(--secondary-foreground);
--color-muted: var(--muted);
--color-muted-foreground: var(--muted-foreground);
--color-accent: var(--accent);
--color-accent-foreground: var(--accent-foreground);
--color-destructive: var(--destructive);
--color-border: var(--border);
--color-input: var(--input);
--color-ring: var(--ring);
--color-chart-1: var(--chart-1);
--color-chart-2: var(--chart-2);
--color-chart-3: var(--chart-3);
--color-chart-4: var(--chart-4);
--color-chart-5: var(--chart-5);
--color-sidebar: var(--sidebar);
--color-sidebar-foreground: var(--sidebar-foreground);
--color-sidebar-primary: var(--sidebar-primary);
--color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
--color-sidebar-accent: var(--sidebar-accent);
--color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
--color-sidebar-border: var(--sidebar-border);
--color-sidebar-ring: var(--sidebar-ring);
}
:root {
--radius: 0.625rem;
--background: oklch(1 0 0);
--foreground: oklch(0.129 0.042 264.695);
--card: oklch(1 0 0);
--card-foreground: oklch(0.129 0.042 264.695);
--popover: oklch(1 0 0);
--popover-foreground: oklch(0.129 0.042 264.695);
--primary: oklch(0.208 0.042 265.755);
--primary-foreground: oklch(0.984 0.003 247.858);
--secondary: oklch(0.968 0.007 247.896);
--secondary-foreground: oklch(0.208 0.042 265.755);
--muted: oklch(0.968 0.007 247.896);
--muted-foreground: oklch(0.554 0.046 257.417);
--accent: oklch(0.968 0.007 247.896);
--accent-foreground: oklch(0.208 0.042 265.755);
--destructive: oklch(0.577 0.245 27.325);
--border: oklch(0.929 0.013 255.508);
--input: oklch(0.929 0.013 255.508);
--ring: oklch(0.704 0.04 256.788);
--chart-1: oklch(0.646 0.222 41.116);
--chart-2: oklch(0.6 0.118 184.704);
--chart-3: oklch(0.398 0.07 227.392);
--chart-4: oklch(0.828 0.189 84.429);
--chart-5: oklch(0.769 0.188 70.08);
--sidebar: oklch(0.984 0.003 247.858);
--sidebar-foreground: oklch(0.129 0.042 264.695);
--sidebar-primary: oklch(0.208 0.042 265.755);
--sidebar-primary-foreground: oklch(0.984 0.003 247.858);
--sidebar-accent: oklch(0.968 0.007 247.896);
--sidebar-accent-foreground: oklch(0.208 0.042 265.755);
--sidebar-border: oklch(0.929 0.013 255.508);
--sidebar-ring: oklch(0.704 0.04 256.788);
}
.dark {
--background: oklch(0.129 0.042 264.695);
--foreground: oklch(0.984 0.003 247.858);
--card: oklch(0.208 0.042 265.755);
--card-foreground: oklch(0.984 0.003 247.858);
--popover: oklch(0.208 0.042 265.755);
--popover-foreground: oklch(0.984 0.003 247.858);
--primary: oklch(0.929 0.013 255.508);
--primary-foreground: oklch(0.208 0.042 265.755);
--secondary: oklch(0.279 0.041 260.031);
--secondary-foreground: oklch(0.984 0.003 247.858);
--muted: oklch(0.279 0.041 260.031);
--muted-foreground: oklch(0.704 0.04 256.788);
--accent: oklch(0.279 0.041 260.031);
--accent-foreground: oklch(0.984 0.003 247.858);
--destructive: oklch(0.704 0.191 22.216);
--border: oklch(1 0 0 / 10%);
--input: oklch(1 0 0 / 15%);
--ring: oklch(0.551 0.027 264.364);
--chart-1: oklch(0.488 0.243 264.376);
--chart-2: oklch(0.696 0.17 162.48);
--chart-3: oklch(0.769 0.188 70.08);
--chart-4: oklch(0.627 0.265 303.9);
--chart-5: oklch(0.645 0.246 16.439);
--sidebar: oklch(0.208 0.042 265.755);
--sidebar-foreground: oklch(0.984 0.003 247.858);
--sidebar-primary: oklch(0.488 0.243 264.376);
--sidebar-primary-foreground: oklch(0.984 0.003 247.858);
--sidebar-accent: oklch(0.279 0.041 260.031);
--sidebar-accent-foreground: oklch(0.984 0.003 247.858);
--sidebar-border: oklch(1 0 0 / 10%);
--sidebar-ring: oklch(0.551 0.027 264.364);
}
@layer base {
* {
@apply border-border outline-ring/50;
}
body {
@apply bg-background text-foreground;
}
}

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const NOTE_NAMES = [
"C",
"C#",
"D",
"D#",
"E",
"F",
"F#",
"G",
"G#",
"A",
"A#",
"B",
] as const;
export type NoteName = `${(typeof NOTE_NAMES)[number]}${number}`;
/**
* A4 = 440 Hz, MIDI 69.
* Returns nearest tempered note (e.g. 440 -> A4).
*/
export function freqToNote(freqHz: number): NoteName | "--" {
if (!Number.isFinite(freqHz) || freqHz <= 0) return "--";
const midi = 69 + 12 * Math.log2(freqHz / 440);
const midiRounded = Math.round(midi);
const name = NOTE_NAMES[((midiRounded % 12) + 12) % 12];
const octave = Math.floor(midiRounded / 12) - 1;
return `${name}${octave}` as NoteName;
}

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export type AudioSample = {
time: string; // ISO
timeMs: number;
rms_db: number; // expected [-50..0]
freq_hz: number; // expected [20..8000]
};

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import type { WsStatus } from "../model/types";
export type LiveWsClientHandlers = {
onStatus: (status: WsStatus) => void;
onMessage: (data: unknown) => void;
};
export class LiveWsClient {
private ws: WebSocket | null = null;
private closedByUser = false;
private retryAttempt = 0;
private retryTimer: number | null = null;
constructor(
private readonly url: string,
private readonly handlers: LiveWsClientHandlers,
) {}
connect(): void {
this.closedByUser = false;
this.open("connecting");
}
close(): void {
this.closedByUser = true;
this.clearRetry();
this.handlers.onStatus("disconnected");
this.ws?.close();
this.ws = null;
}
private open(status: WsStatus): void {
this.handlers.onStatus(status);
try {
const ws = new WebSocket(this.url);
this.ws = ws;
ws.onopen = () => {
this.retryAttempt = 0;
this.handlers.onStatus("open");
};
ws.onmessage = (ev) => {
this.handlers.onMessage(ev.data);
};
ws.onerror = () => {
// let onclose handle reconnect
};
ws.onclose = () => {
this.ws = null;
if (this.closedByUser) return;
this.scheduleReconnect();
};
} catch {
this.scheduleReconnect();
}
}
private scheduleReconnect(): void {
this.handlers.onStatus("reconnecting");
// backoff: 0.5s, 1s, 2s, 4s ... max 10s (+ jitter)
const base = 500 * Math.pow(2, this.retryAttempt);
const capped = Math.min(base, 10_000);
const jitter = capped * (Math.random() * 0.2); // 0..20%
const delay = Math.round(capped + jitter);
this.retryAttempt += 1;
this.clearRetry();
this.retryTimer = window.setTimeout(() => {
if (this.closedByUser) return;
this.open("reconnecting");
}, delay);
}
private clearRetry(): void {
if (this.retryTimer !== null) {
window.clearTimeout(this.retryTimer);
this.retryTimer = null;
}
}
}

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import type { AudioSample } from "../../../entities/audioSample/model/types";
import { parseIsoToMs } from "../../../shared/lib/time";
type RawMessage = {
time: unknown;
rms_db: unknown;
freq_hz: unknown;
};
export type ParseResult =
| { ok: true; sample: AudioSample }
| { ok: false; reason: string };
function devWarn(...args: unknown[]) {
if (import.meta.env.DEV) console.warn(...args);
}
export function parseAndValidateMessage(data: unknown): ParseResult {
let obj: RawMessage;
try {
obj = JSON.parse(String(data)) as RawMessage;
} catch {
devWarn("[liveStream] drop: invalid JSON", data);
return { ok: false, reason: "invalid_json" };
}
if (typeof obj.time !== "string") {
devWarn("[liveStream] drop: time is not string", obj);
return { ok: false, reason: "invalid_time_type" };
}
const timeMs = parseIsoToMs(obj.time);
if (timeMs === null) {
devWarn("[liveStream] drop: time is not ISO", obj.time);
return { ok: false, reason: "invalid_time_value" };
}
const rms = typeof obj.rms_db === "number" ? obj.rms_db : Number.NaN;
const freq = typeof obj.freq_hz === "number" ? obj.freq_hz : Number.NaN;
if (!Number.isFinite(rms) || rms < -50 || rms > 0) {
devWarn("[liveStream] drop: rms_db out of range", rms);
return { ok: false, reason: "rms_out_of_range" };
}
if (!Number.isFinite(freq) || freq < 20 || freq > 8000) {
devWarn("[liveStream] drop: freq_hz out of range", freq);
return { ok: false, reason: "freq_out_of_range" };
}
return {
ok: true,
sample: {
time: obj.time,
timeMs,
rms_db: rms,
freq_hz: freq,
},
};
}

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import { create } from "zustand";
import type { AudioSample } from "../../../entities/audioSample/model/types";
import { env } from "../../../shared/config/env";
import { RingBuffer } from "../../../shared/lib/ringBuffer";
import type { WsStatus } from "./types";
import { LiveWsClient } from "../lib/liveWsClient";
import { parseAndValidateMessage } from "../lib/parseAndValidate";
type LiveStreamState = {
status: WsStatus;
lastMessageAt: number | null;
latest: AudioSample | null;
// snapshot for UI
// storage is ring buffer inside module
history60s: AudioSample[];
peakHoldDb3s: number | null;
connect: () => void;
disconnect: () => void;
loadLatest: (limit?: number) => Promise<void>;
};
const HISTORY_POINTS = 600; // 60s * 10Hz
const PEAK_WINDOW_MS = 3000;
const historyRing = new RingBuffer<AudioSample>(HISTORY_POINTS);
let peakWindow: AudioSample[] = []; // time-based window
let client: LiveWsClient | null = null;
function computePeakDb(windowSamples: AudioSample[]): number | null {
if (windowSamples.length === 0) return null;
let max = -Infinity;
for (const s of windowSamples) max = Math.max(max, s.rms_db);
return Number.isFinite(max) ? max : null;
}
export const useLiveStreamStore = create<LiveStreamState>()((set, get) => ({
status: "disconnected",
lastMessageAt: null,
latest: null,
history60s: [],
peakHoldDb3s: null,
connect: () => {
if (client) return;
client = new LiveWsClient(env.wsUrl, {
onStatus: (st) => set({ status: st }),
onMessage: (data) => {
const parsed = parseAndValidateMessage(data);
if (!parsed.ok) return;
const sample = parsed.sample;
// 60s ring
historyRing.push(sample);
// 3s peak window
const now = Date.now();
peakWindow.push(sample);
const cutoff = now - PEAK_WINDOW_MS;
while (peakWindow.length && peakWindow[0]!.timeMs < cutoff) {
peakWindow.shift();
}
set({
latest: sample,
history60s: historyRing.toArray(),
peakHoldDb3s: computePeakDb(peakWindow),
lastMessageAt: now,
});
},
});
client.connect();
},
disconnect: () => {
client?.close();
client = null;
peakWindow = [];
// historyRing intentionally kept:
// UI/график не прыгает при дисконнекте
set({ status: "disconnected" });
},
loadLatest: async (limit = 100) => {
// optional warm-up for chart after refresh
const url = `${env.apiUrl.replace(/\/$/, "")}/api/v1/audio/latest?limit=${limit}`;
try {
const res = await fetch(url);
if (!res.ok) return;
const raw = (await res.json()) as Array<{
time: string;
rms_db: number;
freq_hz: number;
}>;
for (const item of raw) {
const parsed = parseAndValidateMessage(JSON.stringify(item));
if (!parsed.ok) continue;
historyRing.push(parsed.sample);
}
set({ history60s: historyRing.toArray() });
} catch {
// ignore
}
},
}));

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export type WsStatus = "connecting" | "open" | "reconnecting" | "disconnected";

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import { Badge } from "../../../shared/ui/badge";
import type { WsStatus } from "../model/types";
const toneByStatus: Record<WsStatus, string> = {
connecting: "bg-slate-600",
open: "bg-emerald-600",
reconnecting: "bg-amber-600",
disconnected: "bg-rose-600",
};
export function WsStatusBadge({ status }: { status: WsStatus }) {
return (
<Badge className={`${toneByStatus[status]} text-white`}>ws: {status}</Badge>
);
}

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import { useEffect } from "react";
import { useLiveStreamStore } from "../model/liveStream.store";
export function useLiveStream(options?: { loadLatest?: boolean }) {
const connect = useLiveStreamStore((s) => s.connect);
const disconnect = useLiveStreamStore((s) => s.disconnect);
const loadLatest = useLiveStreamStore((s) => s.loadLatest);
useEffect(() => {
if (options?.loadLatest) void loadLatest(100);
connect();
return () => disconnect();
// eslint-disable-next-line react-hooks/exhaustive-deps
}, []);
}

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import { clsx, type ClassValue } from "clsx"
import { twMerge } from "tailwind-merge"
export function cn(...inputs: ClassValue[]) {
return twMerge(clsx(inputs))
}

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import React from "react";
import ReactDOM from "react-dom/client";
import { App } from "./app/App";
import { WithLiveStream } from "./app/providers/withLiveStream";
import "./app/styles/index.css";
ReactDOM.createRoot(document.getElementById("root")!).render(
<React.StrictMode>
<WithLiveStream>
<App />
</WithLiveStream>
</React.StrictMode>,
);

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import { AudioLiveWidget } from "../../../widgets/audioLive/ui/AudioLiveWidget";
import { useLiveStream } from "../../../features/liveStream/ui/useLiveStream";
export function DashboardPage() {
useLiveStream({ loadLatest: true });
return (
<div className="mx-auto w-full max-w-6xl p-4 md:p-6">
<header className="mb-4">
<h1 className="text-2xl font-semibold">STM32 Audio Dashboard</h1>
<p className="text-sm text-muted-foreground">
WebSocket 10 Hz: rms_db [-50..0], freq_hz [20..8000]
</p>
</header>
<AudioLiveWidget />
</div>
);
}

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export type EnvConfig = {
wsUrl: string;
apiUrl: string;
};
function required(name: string, value: unknown): string {
if (typeof value !== "string" || !value.length) {
throw new Error(`Missing required env var: ${name}`);
}
return value;
}
export const env: EnvConfig = {
wsUrl: required("VITE_WS_URL", import.meta.env.VITE_WS_URL),
apiUrl: required("VITE_API_URL", import.meta.env.VITE_API_URL),
};

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export class RingBuffer<T> {
private buf: (T | undefined)[];
private head = 0;
private len = 0;
constructor(private readonly capacity: number) {
if (!Number.isFinite(capacity) || capacity <= 0) {
throw new Error("RingBuffer capacity must be > 0");
}
this.buf = new Array<T | undefined>(capacity);
}
size(): number {
return this.len;
}
maxSize(): number {
return this.capacity;
}
clear(): void {
this.head = 0;
this.len = 0;
this.buf.fill(undefined);
}
push(item: T): void {
this.buf[this.head] = item;
this.head = (this.head + 1) % this.capacity;
if (this.len < this.capacity) this.len += 1;
}
toArray(): T[] {
const out: T[] = [];
out.length = this.len;
const start = (this.head - this.len + this.capacity) % this.capacity;
for (let i = 0; i < this.len; i++) {
const idx = (start + i) % this.capacity;
out[i] = this.buf[idx] as T;
}
return out;
}
last(): T | null {
if (this.len === 0) return null;
const idx = (this.head - 1 + this.capacity) % this.capacity;
return (this.buf[idx] as T) ?? null;
}
}

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export function parseIsoToMs(iso: string): number | null {
const ms = Date.parse(iso);
return Number.isFinite(ms) ? ms : null;
}
export function formatTimeHHMMSS(ms: number): string {
return new Date(ms).toLocaleTimeString([], { hour12: false });
}
export function isStale(lastMs: number | null, thresholdMs: number): boolean {
if (lastMs === null) return true;
return Date.now() - lastMs > thresholdMs;
}

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import * as React from "react"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "@/lib/utils"
const badgeVariants = cva(
"inline-flex items-center rounded-md border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2",
{
variants: {
variant: {
default:
"border-transparent bg-primary text-primary-foreground shadow hover:bg-primary/80",
secondary:
"border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80",
destructive:
"border-transparent bg-destructive text-destructive-foreground shadow hover:bg-destructive/80",
outline: "text-foreground",
},
},
defaultVariants: {
variant: "default",
},
}
)
export interface BadgeProps
extends React.HTMLAttributes<HTMLDivElement>,
VariantProps<typeof badgeVariants> {}
function Badge({ className, variant, ...props }: BadgeProps) {
return (
<div className={cn(badgeVariants({ variant }), className)} {...props} />
)
}
export { Badge, badgeVariants }

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import * as React from "react"
import { Slot } from "@radix-ui/react-slot"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "@/lib/utils"
const buttonVariants = cva(
"inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
{
variants: {
variant: {
default:
"bg-primary text-primary-foreground shadow hover:bg-primary/90",
destructive:
"bg-destructive text-destructive-foreground shadow-sm hover:bg-destructive/90",
outline:
"border border-input bg-background shadow-sm hover:bg-accent hover:text-accent-foreground",
secondary:
"bg-secondary text-secondary-foreground shadow-sm hover:bg-secondary/80",
ghost: "hover:bg-accent hover:text-accent-foreground",
link: "text-primary underline-offset-4 hover:underline",
},
size: {
default: "h-9 px-4 py-2",
sm: "h-8 rounded-md px-3 text-xs",
lg: "h-10 rounded-md px-8",
icon: "h-9 w-9",
},
},
defaultVariants: {
variant: "default",
size: "default",
},
}
)
export interface ButtonProps
extends React.ButtonHTMLAttributes<HTMLButtonElement>,
VariantProps<typeof buttonVariants> {
asChild?: boolean
}
const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
({ className, variant, size, asChild = false, ...props }, ref) => {
const Comp = asChild ? Slot : "button"
return (
<Comp
className={cn(buttonVariants({ variant, size, className }))}
ref={ref}
{...props}
/>
)
}
)
Button.displayName = "Button"
export { Button, buttonVariants }

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import * as React from "react"
import { cn } from "@/lib/utils"
const Card = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn(
"rounded-xl border bg-card text-card-foreground shadow",
className
)}
{...props}
/>
))
Card.displayName = "Card"
const CardHeader = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn("flex flex-col space-y-1.5 p-6", className)}
{...props}
/>
))
CardHeader.displayName = "CardHeader"
const CardTitle = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn("font-semibold leading-none tracking-tight", className)}
{...props}
/>
))
CardTitle.displayName = "CardTitle"
const CardDescription = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn("text-sm text-muted-foreground", className)}
{...props}
/>
))
CardDescription.displayName = "CardDescription"
const CardContent = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div ref={ref} className={cn("p-6 pt-0", className)} {...props} />
))
CardContent.displayName = "CardContent"
const CardFooter = React.forwardRef<
HTMLDivElement,
React.HTMLAttributes<HTMLDivElement>
>(({ className, ...props }, ref) => (
<div
ref={ref}
className={cn("flex items-center p-6 pt-0", className)}
{...props}
/>
))
CardFooter.displayName = "CardFooter"
export { Card, CardHeader, CardFooter, CardTitle, CardDescription, CardContent }

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import { useLiveStreamStore } from "../../../features/liveStream/model/liveStream.store";
import { WsStatusBadge } from "../../../features/liveStream/ui/WsStatusBadge";
import { AudioMeter } from "./AudioMeter";
import { FrequencyHistoryChart } from "./FrequencyHistoryChart";
import {
Card,
CardContent,
CardHeader,
CardTitle,
} from "../../../shared/ui/card";
import { freqToNote } from "../../../entities/audioSample/lib/note";
import { formatTimeHHMMSS, isStale } from "../../../shared/lib/time";
export function AudioLiveWidget() {
const status = useLiveStreamStore((s) => s.status);
const latest = useLiveStreamStore((s) => s.latest);
const history60s = useLiveStreamStore((s) => s.history60s);
const peakHoldDb3s = useLiveStreamStore((s) => s.peakHoldDb3s);
const lastMessageAt = useLiveStreamStore((s) => s.lastMessageAt);
const stale = isStale(lastMessageAt, 1500);
const note = latest ? freqToNote(latest.freq_hz) : "--";
return (
<div className="grid gap-4 lg:grid-cols-3">
<div className="lg:col-span-1">
<AudioMeter
rmsDb={latest?.rms_db ?? null}
peakHoldDb3s={peakHoldDb3s}
/>
</div>
<div className="lg:col-span-2 grid gap-4">
<Card>
<CardHeader className="pb-2 flex flex-row items-center justify-between gap-3">
<CardTitle className="text-base">Live status</CardTitle>
<WsStatusBadge status={status} />
</CardHeader>
<CardContent className="flex flex-wrap items-center justify-between gap-4">
<div>
<div className="text-sm text-muted-foreground">Last update</div>
<div className="text-lg font-medium tabular-nums">
{lastMessageAt ? formatTimeHHMMSS(lastMessageAt) : "—"}
<span
className={`ml-2 text-xs ${stale ? "text-rose-600" : "text-emerald-600"}`}
>
{stale ? "stale" : "ok"}
</span>
</div>
</div>
<div>
<div className="text-sm text-muted-foreground">Frequency</div>
<div className="text-lg font-medium tabular-nums">
{latest ? `${latest.freq_hz.toFixed(0)} Hz` : "—"}{" "}
<span className="text-muted-foreground">({note})</span>
</div>
</div>
<div>
<div className="text-sm text-muted-foreground">RMS</div>
<div className="text-lg font-medium tabular-nums">
{latest ? `${latest.rms_db.toFixed(1)} dB` : "—"}
</div>
</div>
</CardContent>
</Card>
<FrequencyHistoryChart history={history60s} />
</div>
</div>
);
}

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import { useMemo } from "react";
import {
Card,
CardContent,
CardHeader,
CardTitle,
} from "../../../shared/ui/card";
type Props = {
rmsDb: number | null;
peakHoldDb3s: number | null;
};
function clamp(v: number, min: number, max: number) {
return Math.max(min, Math.min(max, v));
}
function colorByDb(db: number): string {
// default thresholds from spec:
// green: < -20, yellow: < -10, red: >= -10
if (db < -20) return "bg-emerald-500";
if (db < -10) return "bg-amber-500";
return "bg-rose-500";
}
export function AudioMeter({ rmsDb, peakHoldDb3s }: Props) {
const minDb = -50;
const maxDb = 0;
const fillPct = useMemo(() => {
if (rmsDb === null) return 0;
const v = clamp(rmsDb, minDb, maxDb);
return ((v - minDb) / (maxDb - minDb)) * 100;
}, [rmsDb]);
const peakTopPct = useMemo(() => {
if (peakHoldDb3s === null) return null;
const v = clamp(peakHoldDb3s, minDb, maxDb);
const pct = ((v - minDb) / (maxDb - minDb)) * 100;
return 100 - pct; // from top
}, [peakHoldDb3s]);
const barColor = rmsDb === null ? "bg-slate-300" : colorByDb(rmsDb);
return (
<Card>
<CardHeader className="pb-2">
<CardTitle className="text-base">Audio meter</CardTitle>
</CardHeader>
<CardContent className="flex items-center gap-4">
{/* Scale + meter */}
<div className="flex items-stretch gap-3">
{/* ticks */}
<div className="flex flex-col justify-between text-xs text-muted-foreground h-56 select-none">
<div>0 dB</div>
<div>-10</div>
<div>-20</div>
<div>-30</div>
<div>-40</div>
<div>-50</div>
</div>
<div className="relative h-56 w-10 rounded-md bg-slate-200 overflow-hidden">
<div
className={`absolute bottom-0 left-0 right-0 ${barColor} transition-[height] duration-100`}
style={{ height: `${fillPct}%` }}
/>
{peakTopPct !== null && (
<div
className="absolute left-0 right-0 h-[2px] bg-slate-900/80"
style={{ top: `${peakTopPct}%` }}
title={`Peak hold (3s): ${peakHoldDb3s?.toFixed(1)} dB`}
/>
)}
</div>
</div>
{/* Values */}
<div className="min-w-40">
<div className="text-sm text-muted-foreground">Current</div>
<div className="text-2xl font-semibold tabular-nums">
{rmsDb === null ? "—" : `${rmsDb.toFixed(1)} dB`}
</div>
<div className="mt-3 text-sm text-muted-foreground">
Peak hold (3s)
</div>
<div className="text-lg font-medium tabular-nums">
{peakHoldDb3s === null ? "—" : `${peakHoldDb3s.toFixed(1)} dB`}
</div>
</div>
</CardContent>
</Card>
);
}

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import {
Line,
LineChart,
ResponsiveContainer,
Tooltip,
XAxis,
YAxis,
} from "recharts";
import {
Card,
CardContent,
CardHeader,
CardTitle,
} from "../../../shared/ui/card";
import type { AudioSample } from "../../../entities/audioSample/model/types";
import { formatTimeHHMMSS } from "../../../shared/lib/time";
type Props = {
history: AudioSample[];
};
type ChartPoint = {
timeMs: number;
freq_hz: number;
};
export function FrequencyHistoryChart({ history }: Props) {
const data: ChartPoint[] = history.map((s) => ({
timeMs: s.timeMs,
freq_hz: s.freq_hz,
}));
return (
<Card>
<CardHeader className="pb-2">
<CardTitle className="text-base">Frequency (last 60s)</CardTitle>
</CardHeader>
<CardContent>
<div className="h-56 w-full">
<ResponsiveContainer width="100%" height="100%">
<LineChart
data={data}
margin={{ top: 10, right: 12, left: 0, bottom: 0 }}
>
<XAxis
dataKey="timeMs"
type="number"
domain={["dataMin", "dataMax"]}
tickFormatter={(v) => formatTimeHHMMSS(Number(v))}
tick={{ fontSize: 12 }}
/>
<YAxis domain={[20, 8000]} tick={{ fontSize: 12 }} width={44} />
<Tooltip
labelFormatter={(v) => formatTimeHHMMSS(Number(v))}
formatter={(v) => [`${Number(v).toFixed(0)} Hz`, "freq"]}
/>
<Line
type="monotone"
dataKey="freq_hz"
stroke="hsl(var(--primary))"
strokeWidth={2}
dot={false}
isAnimationActive={false}
/>
</LineChart>
</ResponsiveContainer>
</div>
</CardContent>
</Card>
);
}

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/** @type {import('tailwindcss').Config} */
export default {
darkMode: ["class"],
content: ["./index.html", "./src/**/*.{ts,tsx}"],
theme: {
extend: {
borderRadius: {
lg: 'var(--radius)',
md: 'calc(var(--radius) - 2px)',
sm: 'calc(var(--radius) - 4px)'
},
colors: {
background: 'hsl(var(--background))',
foreground: 'hsl(var(--foreground))',
card: {
DEFAULT: 'hsl(var(--card))',
foreground: 'hsl(var(--card-foreground))'
},
popover: {
DEFAULT: 'hsl(var(--popover))',
foreground: 'hsl(var(--popover-foreground))'
},
primary: {
DEFAULT: 'hsl(var(--primary))',
foreground: 'hsl(var(--primary-foreground))'
},
secondary: {
DEFAULT: 'hsl(var(--secondary))',
foreground: 'hsl(var(--secondary-foreground))'
},
muted: {
DEFAULT: 'hsl(var(--muted))',
foreground: 'hsl(var(--muted-foreground))'
},
accent: {
DEFAULT: 'hsl(var(--accent))',
foreground: 'hsl(var(--accent-foreground))'
},
destructive: {
DEFAULT: 'hsl(var(--destructive))',
foreground: 'hsl(var(--destructive-foreground))'
},
border: 'hsl(var(--border))',
input: 'hsl(var(--input))',
ring: 'hsl(var(--ring))',
chart: {
'1': 'hsl(var(--chart-1))',
'2': 'hsl(var(--chart-2))',
'3': 'hsl(var(--chart-3))',
'4': 'hsl(var(--chart-4))',
'5': 'hsl(var(--chart-5))'
}
}
}
},
plugins: [require("tailwindcss-animate")],
};

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@@ -0,0 +1,40 @@
{
"compilerOptions": {
"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
"target": "ES2022",
"useDefineForClassFields": true,
"lib": [
"ES2022",
"DOM",
"DOM.Iterable"
],
"module": "ESNext",
"types": [
"vite/client"
],
"skipLibCheck": true,
"baseUrl": ".",
"paths": {
"@/*": [
"./src/*"
]
},
/* 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"
]
}

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@@ -0,0 +1,19 @@
{
"files": [],
"references": [
{
"path": "./tsconfig.app.json"
},
{
"path": "./tsconfig.node.json"
}
],
"compilerOptions": {
"baseUrl": ".",
"paths": {
"@/*": [
"./src/*"
]
}
}
}

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{
"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"]
}

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import path from "path";
import tailwindcss from "@tailwindcss/vite";
import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";
// https://vite.dev/config/
export default defineConfig({
plugins: [react(), tailwindcss()],
resolve: {
alias: {
"@": path.resolve(__dirname, "./src"),
},
},
});