# Backend

## Installation with Docker

Run the following command to install everything through docker.

The installation takes a bit longer on the first pass or on rebuild ...

```bash
$ docker-compose up

# rebuild the containers for a cleanup
$ docker-compose up --build
```

Wait a little until your backend is up and running at [http://localhost:4000/](http://localhost:4000/).

## Installation without Docker

For the local installation you need a recent version of [node](https://nodejs.org/en/)
(>= `v10.12.0`).

Install node dependencies with [yarn](https://yarnpkg.com/en/):
```bash
$ cd backend
$ yarn install
```

Copy Environment Variables:
```bash
# in backend/
$ cp .env.template .env
```
Configure the new file according to your needs and your local setup. Make sure
a [local Neo4J](http://localhost:7474) instance is up and running.

Start the backend for development with:
```bash
$ yarn run dev
```

or start the backend in production environment with:
```bash
yarn run start
```

For e-mail delivery, please configure at least `SMTP_HOST` and `SMTP_PORT` in
your `.env` configuration file.

Your backend is up and running at [http://localhost:4000/](http://localhost:4000/)
This will start the GraphQL service \(by default on localhost:4000\) where you
can issue GraphQL requests or access GraphQL Playground in the browser.

![GraphQL Playground](../.gitbook/assets/graphql-playground.png)


#### Seed Database

If you want your backend to return anything else than an empty response, you
need to seed your database:

{% tabs %}
{% tab title="Docker" %}

In another terminal run:
```bash
$ docker-compose exec backend yarn run db:seed
```

To reset the database run:
```bash
$ docker-compose exec backend yarn run db:reset
# you could also wipe out your neo4j database and delete all volumes with:
$ docker-compose down -v
# if container is not running, run this command to set up your database indeces and contstraints
$ docker-compose run neo4j db_setup
```
{% endtab %}

{% tab title="Without Docker" %}
Run:
```bash
$ yarn run db:seed
```

To reset the database run:
```bash
$ yarn run db:reset
```
{% endtab %}
{% endtabs %}

### Storybook

We encourage contributors to use Storybook to test out new components in an isolated way, and benefit from its many features.
See the docs for live examples and answers to FAQ, among other helpful information. ![Storybook docs](https://storybook.js.org/docs/basics/introduction/)

{% tabs %}
{% tab title="Docker" %}

After you have started the application following the instructions above, in another terminal run:

```bash
$ docker-compose exec webapp yarn storybook
```
The output should look similar to this:

![Storybook output](../.gitbook/assets/storybook-output.png)

Click on the link http://172.18.0.6:3002/ to open the browser to your interactive storybook.

{% endtab %}

{% tab title="Without Docker" %}
Run the following command: 

```bash
# in webapp/
yarn storybook
```

Open http://localhost:3002/ in your browser

{% endtab %}
{% endtabs %}


# Testing

**Beware**: We have no multiple database setup at the moment. We clean the
database after each test, running the tests will wipe out all your data!


{% tabs %}
{% tab title="Docker" %}

Run the _**jest**_ tests:

```bash
$ docker-compose exec backend yarn run test:jest
```

Run the _**cucumber**_ features:

```bash
$ docker-compose exec backend yarn run test:cucumber
```

{% endtab %}

{% tab title="Without Docker" %}

Run the _**jest**_ tests:

```bash
$ yarn run test:jest
```

Run the _**cucumber**_ features:

```bash
$ yarn run test:cucumber
```

{% endtab %}
{% endtabs %}