# Create Shelf Mapping

Map a collection to a device shelf for syncing.

**Endpoint**: `POST /api/devices/{deviceId}/collections`
**Auth**: Required
**Content-Type**: `application/json`

## Path Parameters

| Parameter | Type | Required | Description |
|-----------|------|-----------|-------------|
| deviceId | string (UUID) | Yes | Device UUID |

## Request Body

| Field | Type | Required | Description |
|--------|------|-----------|-------------|
| collection_id | string (UUID) | Yes | Collection UUID to map |
| device_shelf_name | string | Yes | Name of the shelf on the device |
| sync_direction | string | No | Sync direction (default: "bidirectional") |

### Sync Directions

| Direction | Description |
|-----------|-------------|
| bidirectional | Sync both ways between Bookhoard and device |
| book_to_hoard | Bookhoard → Device only |
| device_to_hoard | Device → Bookhoard only |
| none | No sync (mapping only for reference) |

### Example Request

```json
{
  "collection_id": "550e8400-e29b-41d4-a716-446655440000",
  "device_shelf_name": "Sci-Fi",
  "sync_direction": "bidirectional"
}
```

## Response (201 Created)

```json
{
  "id": "990e8400-e29b-41d4-a716-446655440000",
  "collection_id": "550e8400-e29b-41d4-a716-446655440000",
  "collection_name": "Science Fiction",
  "device_shelf_name": "Sci-Fi",
  "sync_direction": "bidirectional",
  "created_at": "2026-02-01T10:00:00Z"
}
```

## Use Case

Collections can be synced to device-specific shelves (Kobo, KOReader). This allows automatic organization of books on your e-reader based on your Bookhoard collections.

## Error Responses

| Code | Description |
|------|-------------|
| 400 | Invalid request (validation failed) |
| 401 | Authentication required |
| 404 | Device or collection not found |
| 409 | Mapping already exists |
| 500 | Internal server error |

## Try It Out
