# Sync Progress

Sync reading progress from KOReader device.

**Endpoint**: `POST /api/sync/koreader/progress`
**Auth**: Required (Device authentication)

## Device Authentication

This endpoint requires device authentication (not user JWT). Devices authenticate using their device credentials.

## Request Body

| Field | Type | Required | Description |
|--------|------|-----------|-------------|
| device_id | string (UUID) | Yes | Device UUID |
| progress | array | Yes | Array of progress objects |

### Progress Object

| Field | Type | Required | Description |
|--------|------|-----------|-------------|
| book | string | Yes | Book identifier (filename or UUID) |
| percent | float | Yes | Progress percentage (0-100) |
| page | integer | No | Current page number |
| total_pages | integer | No | Total pages in document |
| date_read | string | No | ISO 8601 timestamp of last read |
| updated_at | string | Yes | ISO 8601 timestamp |

### Example Request

```json
{
  "device_id": "550e8400-e29b-41d4-a716-446655440000",
  "progress": [
    {
      "book": "book.epub",
      "percent": 75.5,
      "page": 150,
      "total_pages": 200,
      "date_read": "2026-02-08T10:00:00Z",
      "updated_at": "2026-02-08T10:00:00Z"
    }
  ]
}
```

## Response (200 OK)

```json
{
  "message": "Progress synced successfully",
  "synced_count": 1
}
```

## Error Responses

| Code | Description |
|------|-------------|
| 401 | Device authentication failed |
| 400 | Invalid request data |
| 404 | Device not found |
