Quote-Generator/README.md

# Quote Generator API

Generate Twitter-style quote images programmatically. Perfect for creating social media content, screenshots, or fake tweets.

**Base URL:** `https://quotes.imbenji.net`

## Features

- Twitter-authentic styling
- Support for images and text-only tweets
- Verified badge (blue checkmark)
- Engagement metrics (likes, retweets, replies, views)
- High-resolution output (3240x3240)
- Built-in caching (24-hour TTL)
- Base64 image support
- Docker-ready
- v2 API with stateful sessions for incremental updates
- Persistent snapshot links (48-hour TTL, immutable, shareable)

## API Endpoints

### POST /generate

Generate a quote image using JSON request body.

**Request:**
```bash
curl -X POST https://quotes.imbenji.net/generate \
  -H "Content-Type: application/json" \
  -d '{
    "displayName": "Geoff Marshall",
    "username": "@geofftech",
    "avatarUrl": "https://example.com/avatar.jpg",
    "text": "Does anyone else find it immensely satisfying when you turn a pocket inside out and get rid of the crumbs and fluff stuck in the bottom.",
    "timestamp": 1499766270
  }' --output quote.png
```

### GET /generate

Generate a quote image using query parameters.

**Request:**
```bash
curl "https://quotes.imbenji.net/generate?displayName=John%20Doe&username=@johndoe&text=Hello%20World&timestamp=1735574400" --output quote.png
```

## Parameters

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `displayName` | string | No | Display name (defaults to "Anonymous") |
| `username` | string | No | Twitter handle with @ (defaults to "@anonymous") |
| `avatarUrl` | string | No | Avatar image URL or base64 data URI |
| `text` | string | No | Tweet text content |
| `imageUrl` | string | No | Tweet image URL, base64 data URI, or `null` |
| `timestamp` | integer | No | Unix epoch timestamp in seconds |
| `verified` | boolean | No | Show verified badge (blue checkmark) next to name |
| `engagement` | object | No | Engagement metrics (likes, retweets, replies, views) |

## Response

- **Content-Type:** `image/png`
- **Headers:**
  - `X-Cache`: `HIT` (served from cache) or `MISS` (newly generated)

## Examples

### Text-only tweet

```javascript
fetch('https://quotes.imbenji.net/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'John Doe',
    username: '@johndoe',
    text: 'Just deployed my new API!',
    timestamp: Math.floor(Date.now() / 1000)
  })
})
.then(res => res.blob())
.then(blob => {
  const url = URL.createObjectURL(blob);
  document.getElementById('img').src = url;
});
```

### Tweet with image

```javascript
const response = await fetch('https://quotes.imbenji.net/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'Jane Smith',
    username: '@janesmith',
    avatarUrl: 'https://example.com/avatar.jpg',
    text: 'Check out this amazing view! 🌄',
    imageUrl: 'https://example.com/photo.jpg',
    timestamp: 1735574400
  })
});

const blob = await response.blob();
// Save or display the image
```

### Using base64 images

```javascript
fetch('https://quotes.imbenji.net/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'Alice',
    username: '@alice',
    avatarUrl: 'data:image/png;base64,iVBORw0KGgo...',
    text: 'Using base64 images works too!',
    imageUrl: 'data:image/jpeg;base64,/9j/4AAQSkZJ...',
    timestamp: 1735574400
  })
});
```

### Python example

```python
import requests
import time

response = requests.post('https://quotes.imbenji.net/generate', json={
    'displayName': 'Python User',
    'username': '@pythonista',
    'text': 'Making API calls with Python!',
    'timestamp': int(time.time())
})

with open('quote.png', 'wb') as f:
    f.write(response.content)
```

### cURL with GET

```bash
curl -G "https://quotes.imbenji.net/generate" \
  --data-urlencode "displayName=Test User" \
  --data-urlencode "username=@testuser" \
  --data-urlencode "text=This is a test tweet" \
  --data-urlencode "timestamp=1735574400" \
  --output quote.png
```

### Verified badge

```javascript
fetch('https://quotes.imbenji.net/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'Elon Musk',
    username: '@elonmusk',
    text: 'Just bought Twitter!',
    verified: true,
    timestamp: 1735574400
  })
});
```

### Engagement metrics

```javascript
fetch('https://quotes.imbenji.net/generate', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'Popular User',
    username: '@viral',
    text: 'This tweet went viral!',
    verified: true,
    engagement: {
      replies: 1234,
      retweets: 5678,
      likes: 98765,
      views: 1500000
    },
    timestamp: 1735574400
  })
});
```

**Note:** All four engagement fields (replies, retweets, likes, views) must be provided for the engagement bar to appear. Numbers are automatically formatted (e.g., 1234 → 1.2K, 1500000 → 1.5M).

---

## v2 API (Stateful Sessions)

The v2 API lets you build quote images incrementally. Instead of sending everything in one request, you create a session and update fields as needed. This is more efficient when making multiple edits since you dont need to resend large images every time.

### How it works

1. Create a session with `POST /v2/quote`
2. Update fields with `PATCH /v2/quote/:id` (only send whats changed)
3. Render the image with `GET /v2/quote/:id/image`

Sessions expire after 24 hours of inactivity.

### POST /v2/quote

Create a new session.

**Request:**
```bash
curl -X POST https://quotes.imbenji.net/v2/quote \
  -H "Content-Type: application/json" \
  -d '{
    "displayName": "John Doe",
    "username": "@johndoe",
    "text": "Hello world"
  }'
```

**Response (201):**
```json
{
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "displayName": "John Doe",
  "username": "@johndoe",
  "text": "Hello world",
  "avatarUrl": null,
  "imageUrl": null,
  "timestamp": null,
  "verified": false,
  "engagement": null,
  "createdAt": 1735600000,
  "updatedAt": 1735600000
}
```

### GET /v2/quote/:id

Get current session state.

```bash
curl https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890
```

### PATCH /v2/quote/:id

Update specific fields. Only send the fields you want to change.

```bash
curl -X PATCH https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Updated text!",
    "avatarUrl": "data:image/png;base64,..."
  }'
```

**Engagement updates:**

```bash
# Set all engagement metrics
curl -X PATCH https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  -H "Content-Type: application/json" \
  -d '{
    "engagement": {
      "replies": 100,
      "retweets": 250,
      "likes": 5000,
      "views": 50000
    }
  }'

# Partial update (update only likes, keep other fields)
curl -X PATCH https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  -H "Content-Type: application/json" \
  -d '{
    "engagement": {
      "likes": 10000
    }
  }'

# Clear engagement entirely (removes engagement bar)
curl -X PATCH https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  -H "Content-Type: application/json" \
  -d '{
    "engagement": null
  }'
```

**Verified badge:**

```bash
# Add verified badge
curl -X PATCH https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  -H "Content-Type: application/json" \
  -d '{
    "verified": true
  }'
```

### GET /v2/quote/:id/image

Render the current session state as a PNG image.

```bash
curl https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890/image --output quote.png
```

**Response headers:**
- `Content-Type: image/png`
- `X-Session-Id: <session-id>`
- `X-Cache: HIT` or `MISS`

### DELETE /v2/quote/:id

Delete a session.

```bash
curl -X DELETE https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890
```

Returns `204 No Content` on success.

### POST /v2/quote/:id/snapshot-link

Create a persistent snapshot link. This captures the current state of your session and generates a shareable URL that persists for 48 hours (refreshing on each access).

Unlike the regular `/image` endpoint, snapshots are immutable - they always show the image as it was when the snapshot was created, even if you update the session afterwards.

**Request:**
```bash
curl -X POST https://quotes.imbenji.net/v2/quote/a1b2c3d4-e5f6-7890-abcd-ef1234567890/snapshot-link
```

**Response (201):**
```json
{
  "token": "xY9pQmN3kL8vFw2jRtZ7",
  "url": "https://quotes.imbenji.net/v2/snapshot/xY9pQmN3kL8vFw2jRtZ7",
  "sessionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "createdAt": 1735600000,
  "expiresAt": 1735772800
}
```

### GET /v2/snapshot/:token

Retrieve a snapshot image using its token.

```bash
curl https://quotes.imbenji.net/v2/snapshot/xY9pQmN3kL8vFw2jRtZ7 --output snapshot.png
```

**Response headers:**
- `Content-Type: image/png`
- `X-Snapshot-Token: <token>`
- `X-Cache: HIT` or `MISS`

**Snapshot behavior:**
- **Immutable:** Shows the session state when the snapshot was created
- **TTL:** 48 hours from last access (resets on each view)
- **Cascade delete:** Deleted automatically when parent session is deleted
- **Shareable:** Token can be shared with anyone

### v2 Example Workflow

```javascript
// 1. Create session with initial data
const res = await fetch('https://quotes.imbenji.net/v2/quote', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    displayName: 'Jane Doe',
    username: '@janedoe',
    text: 'Working on something cool'
  })
});
const session = await res.json();
const sessionId = session.id;

// 2. Later, add an avatar (only sends the avatar, not everything again)
await fetch(`https://quotes.imbenji.net/v2/quote/${sessionId}`, {
  method: 'PATCH',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    avatarUrl: 'data:image/png;base64,iVBORw0KGgo...'
  })
});

// 3. Update the text
await fetch(`https://quotes.imbenji.net/v2/quote/${sessionId}`, {
  method: 'PATCH',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    text: 'Finished building something cool!'
  })
});

// 4. Generate the final image
const imgRes = await fetch(`https://quotes.imbenji.net/v2/quote/${sessionId}/image`);
const blob = await imgRes.blob();

// 5. (Optional) Create a shareable snapshot link
const snapshotRes = await fetch(`https://quotes.imbenji.net/v2/quote/${sessionId}/snapshot-link`, {
  method: 'POST'
});
const snapshot = await snapshotRes.json();
console.log('Shareable URL:', snapshot.url);
// Anyone can access: https://quotes.imbenji.net/v2/snapshot/<token>
```

### v2 Parameters

| Parameter | Type | Description |
|-----------|------|-------------|
| `displayName` | string | Display name |
| `username` | string | Twitter handle with @ |
| `avatarUrl` | string | Avatar image URL or base64 |
| `text` | string | Tweet text content |
| `imageUrl` | string | Tweet image URL or base64 |
| `timestamp` | integer | Unix epoch in seconds |
| `verified` | boolean | Show verified badge (blue checkmark) |
| `engagement` | object/null | Engagement metrics (see below) |

**Engagement object:**
```json
{
  "engagement": {
    "replies": 89,
    "retweets": 567,
    "likes": 1234,
    "views": 50000
  }
}
```

**Engagement behavior:**
- All four fields must be provided for the engagement bar to appear
- Partial updates: Only update specific fields, others remain unchanged
- Set to `null` to clear all engagement and hide the engagement bar
- Numbers are auto-formatted (1234 → 1.2K, 1000000 → 1M)

---

## Caching

The API automatically caches generated images for 24 hours from the last request. Identical requests will be served from cache instantly.

- Cache hits include `X-Cache: HIT` header
- Cache misses include `X-Cache: MISS` header
- Cache is cleaned up hourly
- Images are stored based on SHA-256 hash of parameters

## Timestamp Format

The `timestamp` parameter expects a Unix epoch timestamp in **seconds** (not milliseconds).

**JavaScript:**
```javascript
const timestamp = Math.floor(Date.now() / 1000);
```

**Python:**
```python
import time
timestamp = int(time.time())
```

The timestamp will be formatted as: `5:58 PM · Dec 29, 2025`

## Default Avatar

If no `avatarUrl` is provided, a default Twitter-style placeholder avatar will be used.

## Rate Limiting

Currently, there are no rate limits. Please use responsibly.

## Self-Hosting

### Docker (Recommended)

```bash
git clone <repository>
cd quotegen
docker-compose up -d
```

The API will be available at `http://localhost:3000`

### Manual Setup

```bash
npm install
npm start
```

## Health Check

```bash
curl https://quotes.imbenji.net/health
```

Response:
```json
{
  "status": "ok"
}
```

## Technical Details

- **Resolution:** 3240x3240 (1:1 aspect ratio)
- **Format:** PNG
- **Max tweet width:** 450px (auto-scaled to fit)
- **Cache TTL:** 24 hours from last access
- **Session TTL:** 24 hours from last update (v2 API)
- **Snapshot TTL:** 48 hours from last access (v2 API)
- **Cleanup interval:** Every hour
- **Database:** SQLite (for v2 sessions and snapshots)

## Limitations

- Tweet text is not wrapped intelligently (use `\n` for line breaks if needed)
- Very long tweets may be cut off
- External image URLs must be publicly accessible
- Base64 images should be reasonably sized

## Support

For issues or questions, please contact the maintainer.

---

**Built with:** Node.js, Express, Puppeteer, SQLite