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ANTHROPIC_API_KEY=your-key-here
PORT=8083

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node_modules/
.env
src/public/audio/*.mp3

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Dockerfile Normal file
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FROM node:22-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --production
COPY src/ ./src/
EXPOSE 8083
CMD ["node", "src/server.js"]

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# audio-foreign
<<<<<<< HEAD
German conversation practice app with speech recognition and AI feedback.
## Quick start
```bash
cp .env.example .env
# Add your ANTHROPIC_API_KEY to .env
npm install
npm start
# → http://localhost:8083
```
## Docker
```bash
docker build -t audio-foreign .
docker run -p 8083:8083 --env-file .env audio-foreign
```
## Features
- 6 topics × 10 questions each
- Web Speech API — speech synthesis (de-DE) + real-time recognition
- AI feedback via Claude (grammar, style, vocabulary) — response in Russian
- Level selector: A2 / B1 / B2
- Session history (in-memory)
- Dark theme, mobile-first
## Stack
- Node.js 22 + Express (single dependency)
- Vanilla JS SPA (no frameworks)
- Anthropic Claude API (server-side only)
=======
## Getting started
To make it easy for you to get started with GitLab, here's a list of recommended next steps.
Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!
## Add your files
* [Create](https://docs.gitlab.com/user/project/repository/web_editor/#create-a-file) or [upload](https://docs.gitlab.com/user/project/repository/web_editor/#upload-a-file) files
* [Add files using the command line](https://docs.gitlab.com/topics/git/add_files/#add-files-to-a-git-repository) or push an existing Git repository with the following command:
```
cd existing_repo
git remote add origin https://gitlab.com/mirage74-group/audio-foreign.git
git branch -M main
git push -uf origin main
```
## Integrate with your tools
* [Set up project integrations](https://gitlab.com/mirage74-group/audio-foreign/-/settings/integrations)
## Collaborate with your team
* [Invite team members and collaborators](https://docs.gitlab.com/user/project/members/)
* [Create a new merge request](https://docs.gitlab.com/user/project/merge_requests/creating_merge_requests/)
* [Automatically close issues from merge requests](https://docs.gitlab.com/user/project/issues/managing_issues/#closing-issues-automatically)
* [Enable merge request approvals](https://docs.gitlab.com/user/project/merge_requests/approvals/)
* [Set auto-merge](https://docs.gitlab.com/user/project/merge_requests/auto_merge/)
## Test and Deploy
Use the built-in continuous integration in GitLab.
* [Get started with GitLab CI/CD](https://docs.gitlab.com/ci/quick_start/)
* [Analyze your code for known vulnerabilities with Static Application Security Testing (SAST)](https://docs.gitlab.com/user/application_security/sast/)
* [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/topics/autodevops/requirements/)
* [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/user/clusters/agent/)
* [Set up protected environments](https://docs.gitlab.com/ci/environments/protected_environments/)
***
# Editing this README
When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thanks to [makeareadme.com](https://www.makeareadme.com/) for this template.
## Suggestions for a good README
Every project is different, so consider which of these sections apply to yours. The sections used in the template are suggestions for most open source projects. Also keep in mind that while a README can be too long and detailed, too long is better than too short. If you think your README is too long, consider utilizing another form of documentation rather than cutting out information.
## Name
Choose a self-explaining name for your project.
## Description
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## Badges
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## Visuals
Depending on what you are making, it can be a good idea to include screenshots or even a video (you'll frequently see GIFs rather than actual videos). Tools like ttygif can help, but check out Asciinema for a more sophisticated method.
## Installation
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## Usage
Use examples liberally, and show the expected output if you can. It's helpful to have inline the smallest example of usage that you can demonstrate, while providing links to more sophisticated examples if they are too long to reasonably include in the README.
## Support
Tell people where they can go to for help. It can be any combination of an issue tracker, a chat room, an email address, etc.
## Roadmap
If you have ideas for releases in the future, it is a good idea to list them in the README.
## Contributing
State if you are open to contributions and what your requirements are for accepting them.
For people who want to make changes to your project, it's helpful to have some documentation on how to get started. Perhaps there is a script that they should run or some environment variables that they need to set. Make these steps explicit. These instructions could also be useful to your future self.
You can also document commands to lint the code or run tests. These steps help to ensure high code quality and reduce the likelihood that the changes inadvertently break something. Having instructions for running tests is especially helpful if it requires external setup, such as starting a Selenium server for testing in a browser.
## Authors and acknowledgment
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## License
For open source projects, say how it is licensed.
## Project status
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>>>>>>> 46b082d869bd049e04a5c3fdb6e5ca31ffd86f77

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#!/usr/bin/env node
/**
* Generate MP3 audio files for all German questions using ElevenLabs TTS API.
*
* Usage:
* 1. Get your API key from https://elevenlabs.io/app/settings/api-keys
* 2. Run: ELEVENLABS_API_KEY=your-key-here node generate-audio.js
*
* Output: src/public/audio/<topic_id>_<index>.mp3
*
* Free tier: ~10,000 characters/month — enough for all 60 questions (~2,500 chars total).
*/
const fs = require("fs");
const path = require("path");
const API_KEY = process.env.ELEVENLABS_API_KEY;
if (!API_KEY) {
console.error("Error: set ELEVENLABS_API_KEY environment variable");
console.error(" ELEVENLABS_API_KEY=your-key node generate-audio.js");
process.exit(1);
}
// Same questions as in index.html
const TOPICS = [
{
id: "alltag",
questions: [
"Wie sieht dein typischer Morgen aus?",
"Was machst du normalerweise in deiner Freizeit?",
"Wie oft kochst du zu Hause und was bereitest du gerne zu?",
"Beschreibe deinen Tagesablauf an einem Werktag.",
"Welche Aufgaben im Haushalt magst du und welche nicht?",
"Wie verbringst du deinen Feierabend?",
"Machst du regelmäßig Sport? Was und wie oft?",
"Wie oft triffst du dich mit Freunden oder Familie?",
"Was liest du gerne – Bücher, Zeitungen oder Online-Artikel?",
"Wie entspannst du dich nach einem stressigen Tag?",
],
},
{
id: "arbeit",
questions: [
"Was machst du beruflich und was gefällt dir an deiner Arbeit?",
"Wie sieht dein Arbeitsplatz aus – Büro, Homeoffice oder beides?",
"Was sind die größten Herausforderungen in deinem Job?",
"Wie lange arbeitest du täglich und wie ist die Work-Life-Balance?",
"Hast du nette Kollegen? Wie ist das Arbeitsklima?",
"Welche Fähigkeiten brauchst du für deinen Beruf?",
"Was würdest du beruflich ändern, wenn du könntest?",
"Wie wichtig ist Karriere für dich im Vergleich zu Freizeit?",
"Hast du schon mal den Job gewechselt? Warum?",
"Was sind deine beruflichen Ziele für die Zukunft?",
],
},
{
id: "reisen",
questions: [
"Wohin bist du zuletzt gereist und wie war es?",
"Reist du lieber alleine oder mit anderen? Warum?",
"Was ist dein Traumreiseziel und warum?",
"Bevorzugst du Strand, Berge oder Städtereisen?",
"Wie planst du normalerweise deine Reisen?",
"Was nimmst du immer mit auf Reisen?",
"Hast du schon mal einen Kulturschock erlebt?",
"Welches Essen aus einem anderen Land hat dir besonders gefallen?",
"Wie wichtig ist es für dich, die Landessprache zu kennen?",
"Erzähl von einem unvergesslichen Reiseerlebnis.",
],
},
{
id: "schweiz",
questions: [
"Was magst du am Leben in der Schweiz besonders?",
"Wie unterscheidet sich das Schweizerdeutsch vom Hochdeutsch?",
"Was sind typisch schweizerische Gewohnheiten oder Traditionen?",
"Welche Sehenswürdigkeiten in Bern kennst du?",
"Was ist das Besondere am schweizerischen Bildungssystem?",
"Wie ist das öffentliche Verkehrsnetz in der Schweiz?",
"Was denkst du über die Mehrsprachigkeit in der Schweiz?",
"Welche Schweizer Gerichte kennst du und magst du?",
"Wie erleben Ausländer das Einleben in der Schweiz?",
"Was sind Vor- und Nachteile der direkten Demokratie?",
],
},
{
id: "gesundheit",
questions: [
"Wie wichtig ist dir deine Gesundheit im Alltag?",
"Treibst du Sport für die Gesundheit oder zum Spaß?",
"Wie ernährst du dich – bewusst oder eher spontan?",
"Wie gehst du mit Stress um?",
"Schläfst du gut? Was machst du für besseren Schlaf?",
"Gehst du regelmäßig zum Arzt für Vorsorgeuntersuchungen?",
"Was meinst du – wie viel Einfluss hat man auf die eigene Gesundheit?",
"Wie beeinflusst das Wetter deine Stimmung und Gesundheit?",
"Hast du Allergien oder besondere gesundheitliche Themen?",
"Was ist für dich gesunde Ernährung?",
],
},
{
id: "meinungen",
questions: [
"Was denkst du über soziale Medien – Fluch oder Segen?",
"Glaubst du, dass Homeoffice die Produktivität steigert?",
"Was meinst du: Ist lebenslanges Lernen wichtig?",
"Wie stehst du zu vegetarischer oder veganer Ernährung?",
"Glaubst du, dass KI unsere Arbeitswelt stark verändern wird?",
"Was hältst du von öffentlichem Nahverkehr statt Autofahren?",
"Ist es wichtig, mehrere Sprachen zu sprechen? Warum?",
"Was denkst du über die vier-Tage-Arbeitswoche?",
"Sollten mehr Menschen ehrenamtlich arbeiten?",
"Wie wichtig ist lokales Einkaufen für die Umwelt?",
],
},
];
// ElevenLabs voice ID — "Daniel" (German male, clear, natural)
// Browse voices at https://elevenlabs.io/voice-library and replace if needed
const VOICE_ID = "onwK4e9ZLuTAKqWW03F9";
const MODEL_ID = "eleven_multilingual_v2";
const OUTPUT_DIR = path.join(__dirname, "src", "public", "audio");
async function generateAudio(text, outputPath) {
const response = await fetch(
`https://api.elevenlabs.io/v1/text-to-speech/${VOICE_ID}`,
{
method: "POST",
headers: {
"xi-api-key": API_KEY,
"Content-Type": "application/json",
Accept: "audio/mpeg",
},
body: JSON.stringify({
text,
model_id: MODEL_ID,
language_code: "de",
voice_settings: {
stability: 0.6,
similarity_boost: 0.8,
speed: 0.9,
},
}),
}
);
if (!response.ok) {
const error = await response.text();
throw new Error(`ElevenLabs API error ${response.status}: ${error}`);
}
const buffer = Buffer.from(await response.arrayBuffer());
fs.writeFileSync(outputPath, buffer);
}
async function main() {
fs.mkdirSync(OUTPUT_DIR, { recursive: true });
let total = 0;
let generated = 0;
let skipped = 0;
for (const topic of TOPICS) {
total += topic.questions.length;
}
console.log(`Generating ${total} audio files...\n`);
for (const topic of TOPICS) {
for (let i = 0; i < topic.questions.length; i++) {
const filename = `${topic.id}_${i}.mp3`;
const outputPath = path.join(OUTPUT_DIR, filename);
// Skip if already exists (resume support)
if (fs.existsSync(outputPath)) {
skipped++;
console.log(` [skip] ${filename} (already exists)`);
continue;
}
const question = topic.questions[i];
process.stdout.write(
` [${generated + skipped + 1}/${total}] ${filename} ... `
);
try {
await generateAudio(question, outputPath);
generated++;
console.log("OK");
} catch (err) {
console.log(`FAILED: ${err.message}`);
console.log(" Stopping. Re-run to continue from where you left off.");
process.exit(1);
}
// Delay to respect rate limits
await new Promise((r) => setTimeout(r, 500));
}
}
console.log(
`\nDone! Generated: ${generated}, Skipped: ${skipped}, Total: ${total}`
);
console.log(`Files saved to: ${OUTPUT_DIR}`);
}
main();

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{
"name": "audio-foreign",
"version": "1.0.0",
"description": "German conversation practice app",
"main": "src/server.js",
"scripts": {
"start": "node src/server.js",
"dev": "node --env-file=.env --watch src/server.js"
},
"dependencies": {
"express": "^4.18.2"
},
"engines": {
"node": ">=22"
}
}

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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
<defs>
<linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#4a6cf7"/>
<stop offset="100%" style="stop-color:#6c8eff"/>
</linearGradient>
<linearGradient id="globe" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#ffffff;stop-opacity:0.95"/>
<stop offset="100%" style="stop-color:#e0e7ff;stop-opacity:0.9"/>
</linearGradient>
</defs>
<!-- Rounded square background -->
<rect width="512" height="512" rx="112" fill="url(#bg)"/>
<!-- Globe circle -->
<circle cx="232" cy="272" r="140" fill="none" stroke="url(#globe)" stroke-width="14"/>
<!-- Globe meridians -->
<ellipse cx="232" cy="272" rx="60" ry="140" fill="none" stroke="url(#globe)" stroke-width="10"/>
<ellipse cx="232" cy="272" rx="110" ry="140" fill="none" stroke="url(#globe)" stroke-width="8" opacity="0.5"/>
<!-- Globe parallels -->
<line x1="92" y1="220" x2="372" y2="220" stroke="url(#globe)" stroke-width="9" opacity="0.7"/>
<line x1="92" y1="272" x2="372" y2="272" stroke="url(#globe)" stroke-width="9"/>
<line x1="92" y1="324" x2="372" y2="324" stroke="url(#globe)" stroke-width="9" opacity="0.7"/>
<!-- Speech bubble -->
<rect x="270" y="80" width="170" height="110" rx="24" fill="white" opacity="0.95"/>
<polygon points="290,190 310,190 280,220" fill="white" opacity="0.95"/>
<!-- "de" text in speech bubble -->
<text x="355" y="152" font-family="Arial, Helvetica, sans-serif" font-size="62" font-weight="700" fill="#4a6cf7" text-anchor="middle">de</text>
</svg>
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const express = require("express");
const path = require("path");
const app = express();
const PORT = process.env.PORT || 8083;
const ANTHROPIC_API_KEY = process.env.ANTHROPIC_API_KEY;
app.use(express.json());
app.use(express.static(path.join(__dirname, "public")));
const LEVEL_DESCRIPTIONS = {
A2: "базовый (A2): будь снисходителен к ошибкам, хвали за попытку, указывай только грубые ошибки",
B1: "средний (B1): указывай основные грамматические ошибки и предлагай улучшения",
B2: "выше среднего (B2): анализируй детально — грамматику, стиль, лексику, естественность речи",
};
app.post("/api/check", async (req, res) => {
const { question, answer, level } = req.body;
if (!question || !answer) {
return res.status(400).json({ error: "question and answer are required" });
}
if (!ANTHROPIC_API_KEY) {
return res.status(500).json({ error: "API key not configured" });
}
const levelDesc = LEVEL_DESCRIPTIONS[level] || LEVEL_DESCRIPTIONS["B1"];
const systemPrompt = `Ты помощник для практики разговорного немецкого языка. Уровень пользователя: ${levelDesc}.
ВАЖНО: ответ пользователя получен через автоматическое распознавание речи (speech-to-text), поэтому в нём могут быть неправильные заглавные буквы, отсутствовать знаки препинания или быть опечатки — это артефакты распознавания, НЕ ошибки пользователя. Никогда не упоминай и не исправляй заглавные буквы, пунктуацию и орфографию.
Тебе дают вопрос на немецком и ответ пользователя на немецком. Твоя задача:
1. **Оценка** — кратко оцени ответ (1-2 предложения)
2. **Ошибки** — перечисли грамматические/лексические ошибки с исправлениями (если есть)
3. **Улучшенная версия** — предложи более естественную/правильную формулировку ответа
4. **Полезные слова и фразы** — 2-4 слова или выражения по теме с переводом
Отвечай на русском языке. Будь конструктивным. Используй markdown для форматирования.`;
const userMessage = `Вопрос: ${question}\n\nОтвет пользователя: ${answer}`;
try {
const response = await fetch("https://api.anthropic.com/v1/messages", {
method: "POST",
headers: {
"Content-Type": "application/json",
"x-api-key": ANTHROPIC_API_KEY,
"anthropic-version": "2023-06-01",
},
body: JSON.stringify({
model: "claude-haiku-4-5-20251001",
max_tokens: 1024,
system: systemPrompt,
messages: [{ role: "user", content: userMessage }],
}),
});
if (!response.ok) {
const error = await response.text();
console.error("Anthropic API error:", response.status, error);
return res.status(502).json({ error: "AI service error" });
}
const data = await response.json();
const feedback = data.content?.[0]?.text || "";
res.json({ feedback });
} catch (err) {
console.error("Request failed:", err);
res.status(500).json({ error: "Internal server error" });
}
});
app.listen(PORT, () => {
console.log(`Server running on http://localhost:${PORT}`);
});