## Installing Dimension

**Note**: Dimension is only supported in Element Web and Desktop at the moment. With some effort,
it can be used in other clients or Element iOS/Android, though is not guaranteed to work. In future,
this should be handled by [an integration manager specification](https://github.com/turt2live/matrix-dimension/issues/262).

There are several options for installing Dimension. The easiest is dependent on how you have Element
and your homeserver set up. If you're using [matrix-docker-ansible-deploy](https://github.com/spantaleev/matrix-docker-ansible-deploy),
there are already options for configuring Dimension.

### Step 0: Requirements

You will need a functioning homeserver (such as [Synapse](https://github.com/matrix-org/synapse)) and
a client to access Dimension with. Currently, that means using [Element Web or Desktop](https://element.io).

Additionally, you will need to be able to host Dimension on a dedicated domain. If your homeserver
is set up for example.org, we recommend using dimension.example.org for Dimension.

Finally, this guide assumes you are running nginx as a webserver for Element, your homeserver, and
Dimension. A basic configuration before setting up Dimension would be:

```conf
server {
    # Simple configuration for Synapse. Consult the Synapse documentation for however you would
    # like to run your homeserver.
    server_name example.org;
    listen 443 ssl;
    listen [::]:443 ssl;

    location /_matrix {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://localhost:8008;
    }
}

server {
    # Simple configuration for serving Element
    server_name chat.example.org;
    listen 443 ssl;
    listen [::]:443 ssl;

    root /var/www/html;
    index index.html;

    location / {
        try_files $uri $uri/ =404.html;
    }
}
```

The SSL options are not shown. Using [Let's Encrypt with nginx](https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-18-04)
is fairly straightforward, however.

**Note**: If you're running Dimension in an unfederated environment, you'll have some additional setup
to do. See [unfederated.md](./unfederated.md) for more information.

### Step 1: Picking between Docker and building Dimension yourself

Docker images are provided as `turt2live/matrix-dimension` and require fewer resources than building
it yourself.

If you're using Docker, create a directory at `/etc/dimension` (or wherever you'd like - just remember
where it is!).

To build Dimension yourself, you'll need Node 10+, npm 6+, and 2-4gb of RAM. The following steps are enough
to get you started:
```bash
# Download dimension
git clone https://github.com/turt2live/matrix-dimension.git
cd matrix-dimension

# Install dependencies
npm install

# Build it
npm run build
```

### Step 2: Configuring Dimension

**Docker**: Using [the default config](https://github.com/turt2live/matrix-dimension/blob/master/config/default.yaml)
as an example, create a file at `/etc/dimension/config.yaml`.

**Building**: Copy `config/default.yaml` to `config/production.yaml`


After creating the file, open it in an editor like `nano` and start filling in the details. Don't forget
to add your user ID as an admin in the configuration - this is important later!

If you're using Docker, leave the `web` `port` and `address` as-is. Additionally, make sure to configure
the `database` section to look like this:
```yaml
database:
    file: "/data/dimension.db"
    botData: "/data/bot.json"
```

### Step 3: Running Dimension

**Docker**:
```bash
docker run -d --name dimension -p 127.0.0.1:8184:8184 -v /etc/dimension:/data turt2live/matrix-dimension
```

**Building**:
```bash
NODE_ENV=production npm run start:app
```

If all went well, Dimension should now be running - there's still a bit more configuration to
go though.

### Step 4: Configuring nginx

Create a new server definition for your nginx server:
```conf
server {
    server_name dimension.example.org;
    listen 443 ssl;
    listen [::]:443 ssl;

    root /var/www/html;
    index index.html;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://localhost:8184;
    }
}
```

Reload or restart nginx after creating the configuration.

### Step 5: Final steps

If everything went according to plan, you should be able to visit `https://dimension.example.org`
and see instructions for configuring Element. If you don't, your configuration isn't working as
intended - double check that all the configuration is set up and visit [#dimension:t2bot.io](https://matrix.to/#/#dimension:t2bot.io)
for further help.

After configuring Element, click the integrations button (4 squares in the top right of any room) and
then click the gear icon. If you don't see a gear icon, you're not an admin in the config. This is
where you'll configure different integrations as Dimension doesn't ship with anything enabled by
default - click around and start enabling things.

### Step 6: Updating and restarting Dimension

**Docker**:
```bash
docker pull turt2live/matrix-dimension
docker restart dimension
```

**Building**:
```bash
# Kill the running Dimension process, then...

git pull
npm run build
NODE_ENV=production npm run start:app
```