LicenseDb

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LicenseDb is an open-source project designed to simplify license and obligation management for tools such as FOSSology and SW360. Its goal is to streamline the workflow for legal teams by providing a centralized interface, eliminating the need to log into and navigate multiple tools.

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# LicenseDb

License as a service provides a convenient and effective way for organizations to
manage their use of open-source licenses. With the growing popularity of open-source
software, organizations are finding it more difficult to keep track of the various
licenses and terms under which they are permitted to use open-source components.
Open-source licenses can be complicated, making it difficult to understand how they
apply to a specific piece of software or interact with other licenses. It can be
used for various purposes by organizations and tools like [FOSSology](https://fossology.org)
and [SW360](https://eclipse.org/sw360) like license identification, filtering, and
managing licenses. There are benefits of this service such as increasing flexibility,
a faster time-to-access, and managing the database.

## Database

Licensedb database has licenses, obligations, obligation map, users, their audits
and changes.

- **license_dbs** table has list of licenses and all the data related to the licenses.
- **obligations** table has the list of obligations that are related to the licenses.
- **obligation_maps** table that maps obligations to their respective licenses.
- **users** table has the user that are associated with the licenses.
- **audits** table has the data of audits that are done in obligations or licenses
- **change_logs** table has all the change history of a particular audit.

![ER Diagram](https://raw.githubusercontent.com/fossology/LicenseDb/main/docs/assets/licensedb_erd.png)

## APIs

There are multiple API endpoints for licenses, obligations, user and audit
endpoints.

### API endpoints

Check the OpenAPI documentation for the API endpoints at
[cmd/laas/docs/swagger.yaml](https://github.com/fossology/LicenseDb/blob/main/cmd/laas/docs/swagger.yaml).

The same can be viewed by Swagger UI plugin after installing and running the
tool at [http://localhost:8080/swagger/index.html](http://localhost:8080/swagger/index.html).

### Authentication

To get the access token, send a POST request to `/api/v1/login` with the
username and password.

```bash
curl -X POST "http://localhost:8080/api/v1/login" \
-H "accept: application/json" -H "Content-Type: application/json" \
-d "{ \"username\": \"<username>\", \"password\": \"<password>\"}"
```

As the response of the request, a JWT will be returned. Use this JWT with the
`Authorization` header (as `-H "Authorization: <JWT>"`) to access endpoints
requiring authentication.

## Prerequisite

Before proceeding, make sure you have the following installed on your system:

- Install Golang

Follow the official instructions to install Golang:  
👉 [https://go.dev/doc/install](https://go.dev/doc/install)

---

- Install golang-migrate CLI (For Linux & MacOs)

```bash
curl -L https://github.com/golang-migrate/migrate/releases/latest/download/migrate.linux-amd64.tar.gz | tar xvz
sudo mv migrate /usr/local/bin/
```

## How to run this project?

- Clone this Project and Navigate to the folder.

``` bash
git clone https://github.com/fossology/LicenseDb.git
cd LicenseDb
```

- Create the `external_ref_fields.yaml` file in the root directory of the project and change the
  values of the extra license json keys as per your requirement.

```bash
cp external_ref_fields.example.yaml external_ref_fields.yaml
vim external_ref_fields.yaml
```

- Generate Go struct for the extra fields listed in the external_ref_fields.yaml.

```bash
go generate ./...
```

- Build the project using following command.

```bash
go build ./cmd/laas
```

- Create the `.env` file in the root directory of the project and change the
  values of the environment variables as per your requirement.

```bash
cp configs/.env.dev.example .env
vim .env
```

- Run the migration files.
```bash
migrate -path pkg/db/migrations -database "postgres://fossy:fossy@localhost:5432/licensedb?sslmode=disable" up
```

- Run the executable.

```bash
./laas
```

- You can directly run it by the following command.

```bash
go run ./cmd/laas
```

### Create first user
Connect to the database using `psql` with the following command.
```bash
psql -h localhost -p 5432 -U fossy -d licensedb
```

Run the following query to create the first user.
```sql
INSERT INTO users (user_name, user_password, user_level, display_name, user_email) VALUES ('<username>', '<password>', 'SUPER_ADMIN', '<display_name>', '<user_email>');
```
## LicenseDB with Docker

LicenseDB is available as a prebuilt Docker image on [GitHub Container Registry (GHCR)](https://ghcr.io/fossology/licensedb).  
You can run it either using a simple `docker run` command or with the included `docker-compose.yml` file for a full setup with PostgreSQL.

---

### Option 1: Run with Docker directly

```bash
# Pull the latest stable release
docker pull ghcr.io/fossology/licensedb:latest

# Run LicenseDB (requires a PostgreSQL instance)
docker run \
  --name licensedb \
  -p 8080:8080 \
  -e DB_HOST=<your-postgres-host> \
  -e DB_PORT=5432 \
  -e DB_USER=fossy \
  -e DB_PASSWORD=fossy \
  -e DB_NAME=licensedb \
  ghcr.io/fossology/licensedb:latest
```

> ⚠️ This method requires you to have PostgreSQL running separately.  
> If you’d like an **all-in-one setup** with PostgreSQL included, use the Docker Compose option below.

---

### Option 2: Run with Docker Compose (recommended)

A `docker-compose.yml` is included in this repository to make it easy to spin up LicenseDB along with PostgreSQL.

```bash
# Build and start the containers
docker compose up -d
```

This will start two services:
- **licensedb** → The LicenseDB API (exposed at `http://localhost:8080`)
- **postgres** → PostgreSQL 16 instance with preconfigured credentials

---

## ⚙️ Environment Variables

You can customize LicenseDB behavior via environment variables in the `docker-compose.yml`.

| Variable                          | Default Value           | Description                                    |
|-----------------------------------|-------------------------|------------------------------------------------|
| `DB_HOST`                         | `postgres`              | Hostname of the PostgreSQL database            |
| `DB_PORT`                         | `5432`                  | PostgreSQL port                                |
| `DB_USER`                         | `fossy`                 | Database username                              |
| `DB_PASSWORD`                     | `fossy`                 | Database password                              |
| `DB_NAME`                         | `licensedb`             | Database name                                  |
| `GIN_MODE`                        | `debug`                 | Gin mode (`debug`, `release`)                  |
| `DEFAULT_ISSUER`                  | `http://localhost:8080` | Default issuer for authentication tokens       |
| `SIMILARITY_THRESHOLD`            | `0.9`                   | Similarity threshold for license matching      |
| `PORT`                            | `8080`                  | Port where LicenseDB runs inside the container |
| `TOKEN_HOUR_LIFESPAN`             | `24`                    | Token expiration time in hours                 |
| `READ_API_AUTHENTICATION_ENABLED` | `false`                 | Enable/disable authentication for read APIs    |

---

## 🔍 Verify the Setup

Once containers are running, you can check:

```bash
# List running containers
docker ps

# View logs for LicenseDB
docker logs -f licensedb
```

Backend should be available at:  
👉 [http://localhost:8080](http://localhost:8080)

### Generating Swagger Documentation
1. Install [swag](https://github.com/swaggo/swag) using the following command.
    ```bash
    go install github.com/swaggo/swag/cmd/swag@latest
    ```
2. Run the following command to generate swagger documentation.
    
    ```bash
    swag init --parseDependency --generalInfo api.go --dir ./pkg/api,./pkg/auth,./pkg/db,./pkg/models,./pkg/utils --output ./cmd/laas/docs
    ```
3. Swagger documentation will be generated in `./cmd/laas/docs` folder.
4. Run the project and navigate to `http://localhost:8080/swagger/index.html` to view the documentation.
5. Optionally, after changing any documentation comments, format them with following command.
    ```bash
    swag fmt --generalInfo ./pkg/api/api.go --dir ./pkg/api,./pkg/auth,./pkg/db,./pkg/models,./pkg/utils
    ```

### Testing (local)
The PostgreSQL user `fossy` must have the `CREATEDB` privilege in order to:

- Programmatically create and drop a test database.
- Apply migrations on the test DB before running tests.

```bash
sudo -u postgres psql; // log into psql with postgres super user 
ALTER USER fossy CREATEDB; // alter the role for fossy
\du ;                     // verify role 
```
Create the `.env.test` file file in the `configs` directory of the project.
```
cp configs/.env.test.example .env.test
```

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