dal-license-server/API.md

# DAL License Server — API Dokumentacija

Bazni URL: `http://localhost:8090`

## Health

### GET /api/v1/health

Provera da li server radi.

**Response 200:**
```json
{"status": "ok"}
```

---

## Klijentski API

Endpointi za klijentske aplikacije (ESIR, ARV, Light-Ticket). Bez autentifikacije, zastiteni rate limiting-om.

### POST /api/v1/activate

Aktivacija licence na konkretnom racunaru.

**Request:**
```json
{
  "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
  "machine_fingerprint": "sha256:a1b2c3d4e5f6...",
  "app_version": "1.0.0",
  "os": "windows",
  "hostname": "FIRMA-PC"
}
```

**Response 200:**
```json
{
  "license": {
    "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
    "product": "LIGHT_TICKET",
    "license_type": "MONTHLY",
    "issued_at": "2026-03-01T00:00:00Z",
    "expires_at": "2026-04-01T00:00:00Z",
    "activated_at": "2026-03-03T10:00:00Z",
    "machine_fingerprint": "sha256:a1b2c3d4e5f6...",
    "grace_days": 30,
    "limits": {
      "max_operators": 3
    },
    "features": ["TICKET_VALIDATION", "REPORTS", "EXCEL_EXPORT", "LIVE_FEED"],
    "customer": {
      "name": "Firma DOO",
      "email": "admin@firma.rs"
    }
  },
  "signature": "RSA-SHA256:base64encodedSignature..."
}
```

**Error kodovi:**

| Kod | Opis |
|-----|------|
| INVALID_KEY | Licencni kljuc ne postoji |
| ALREADY_ACTIVATED | Licenca vec aktivirana na drugom racunaru |
| KEY_EXPIRED | Licenca istekla |
| KEY_REVOKED | Licenca opozvana |
| PRODUCT_MISMATCH | Proizvod ne odgovara |

**Error response 400:**
```json
{
  "error": {
    "code": "ALREADY_ACTIVATED",
    "message": "Licenca je već aktivirana na drugom računaru",
    "details": {
      "activated_on": "DRUGA-PC",
      "activated_at": "2026-02-15T08:00:00Z"
    }
  }
}
```

### POST /api/v1/deactivate

Deaktivacija licence (za transfer na drugi racunar).

**Request:**
```json
{
  "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
  "machine_fingerprint": "sha256:a1b2c3d4e5f6..."
}
```

**Response 200:**
```json
{
  "message": "Licenca uspešno deaktivirana",
  "can_reactivate": true
}
```

### POST /api/v1/validate

Opciona online provera validnosti licence.

**Request:**
```json
{
  "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
  "machine_fingerprint": "sha256:a1b2c3d4e5f6..."
}
```

**Response 200:**
```json
{
  "valid": true,
  "expires_at": "2026-04-01T00:00:00Z",
  "revoked": false
}
```

---

## Admin API

Svi admin endpointi zahtevaju `X-API-Key` header.

```
X-API-Key: vas-api-kljuc
```

### GET /api/v1/admin/products

Lista svih proizvoda.

**Response 200:**
```json
[
  {
    "id": 1,
    "code": "ESIR",
    "name": "ESIR Fiskalizacija",
    "key_prefix": "ESIR-",
    "default_limits": {"max_installations": 1},
    "available_features": ["FISCALIZATION", "REPORTS"],
    "active": true
  }
]
```

### GET /api/v1/admin/licenses

Lista licenci. Podrzava filter po proizvodu.

**Query parametri:**
- `product` — Filter po product code (ESIR, ARV, LIGHT_TICKET)

**Response 200:**
```json
[
  {
    "id": 1,
    "product_code": "LIGHT_TICKET",
    "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
    "license_type": "MONTHLY",
    "customer_name": "Firma DOO",
    "expires_at": "2026-04-01T00:00:00Z",
    "active": true,
    "revoked": false
  }
]
```

### POST /api/v1/admin/licenses

Kreiranje nove licence.

**Request:**
```json
{
  "product_code": "LIGHT_TICKET",
  "license_type": "MONTHLY",
  "customer_name": "Firma DOO",
  "customer_pib": "123456789",
  "customer_email": "admin@firma.rs",
  "limits": {"max_operators": 10},
  "features": ["TICKET_VALIDATION", "REPORTS", "EXCEL_EXPORT", "LIVE_FEED"],
  "grace_days": 30,
  "notes": "Pro paket"
}
```

**Response 201:**
```json
{
  "id": 1,
  "license_key": "LT-K7M2-9P4N-R3W8-J6T1",
  "message": "Licenca kreirana"
}
```

### GET /api/v1/admin/licenses/{id}

Detalji jedne licence.

### PUT /api/v1/admin/licenses/{id}

Izmena licence.

### POST /api/v1/admin/licenses/{id}/revoke

Opozivanje licence.

**Request:**
```json
{
  "reason": "Klijent nije platio"
}
```

### POST /api/v1/admin/licenses/{id}/release

Force release aktivacije (kada je racunar klijenta nedostupan).

### GET /api/v1/admin/licenses/{id}/activations

Lista aktivacija za licencu.

### GET /api/v1/admin/audit

Audit log. Lista svih akcija.

### GET /api/v1/admin/stats

Statistike po proizvodima.

---

## Dashboard rute (htmx)

| Metoda | Putanja | Opis |
|--------|---------|------|
| GET | /login | Login stranica |
| POST | /login | Login submit |
| POST | /logout | Logout |
| GET | /dashboard | Pocetna — statistike |
| GET | /licenses | Lista licenci |
| GET | /licenses/new | Forma za novu licencu |
| POST | /licenses | Kreiranje licence |
| GET | /licenses/{id} | Detalji licence |
| POST | /licenses/{id}/revoke | Opozivanje |
| POST | /licenses/{id}/release | Force release |
| GET | /audit | Audit log |

---

## Rate limiting

| Endpoint | Limit |
|----------|-------|
| POST /api/v1/activate | 10 req/min per IP |
| POST /api/v1/deactivate | 10 req/min per IP |
| POST /api/v1/validate | 60 req/min per IP |

---

*Mart 2026*