# Google Cloud Healthcare

> The [Google Cloud Healthcare API](https://cloud.google.com/healthcare/) is a
> powerful option for storing medical imaging data in the cloud.

An alternative to deploying your own PACS is to use a software-as-a-service
provider such as Google Cloud. The Cloud Healthcare API promises to be a
scalable, secure, cost effective image storage solution for those willing to
store their data in the cloud. It offers an
[almost-entirely complete DICOMWeb API](https://cloud.google.com/healthcare/docs/dicom)
which requires tokens generated via the
[OAuth 2.0 Sign In flow](https://developers.google.com/identity/sign-in/web/sign-in).
Images can even be transcoded on the fly if this is desired.

## Setup a Google Cloud Healthcare Project

- Create a Google Cloud account
- Create a project in Google Cloud
- Enable the [Cloud Healthcare API](https://cloud.google.com/healthcare/) for
  your project.
  - (Optional): Create a Dataset and Data Store for storing your DICOM data
- Enable the
  [Cloud Resource Manager API](https://cloud.google.com/resource-manager/) for
  your project.
  - _Note:_ If you are having trouble finding the APIs, use the search box at
    the top of the Cloud console.
- Go to APIs & Services > Credentials to create an OAuth Consent screen and fill
  in your application details.
  - Under Scopes for Google APIs, click "manually paste scopes".
  - Add the following scopes:
    - `https://www.googleapis.com/auth/cloudplatformprojects.readonly`
    - `https://www.googleapis.com/auth/cloud-healthcare`
- Go to APIs & Services > Credentials to create a new set of credentials:

  - Choose the "Web Application" type
  - Set up an
    [OAuth 2.0 Client ID](https://support.google.com/cloud/answer/6158849?hl=en)
  - Add your domain (e.g. `http://localhost:3000`) to Authorized JavaScript
    origins.
  - Add your domain, plus `callback` (e.g. `http://localhost:3000/callback`) to
    Authorized Redirect URIs.
  - Save your Client ID for later.

- (Optional): Enable Public Datasets that are being hosted by Google:
  https://cloud.google.com/healthcare/docs/resources/public-datasets/

## Run the viewer with your OAuth Client ID

1. Open the `config/google.js` file and change `YOURCLIENTID` to your Client ID
   value.
1. Run the OHIF Viewer using the config/google.js configuration file

```bash
cd OHIFViewer
yarn install
APP_CONFIG=config/google.js yarn run dev
```

## Running via Docker

The OHIF Viewer Docker container can be connected to Google Cloud Healthcare by
providing a Client ID at runtime. This is a very simple method to get up and
running.

1. Install Docker (https://www.docker.com/)
1. Run the Docker container, providing a Client ID as an environment variable.
   Client IDs look like `xyz.apps.googleusercontent.com`.

```bash
docker run --env CLIENT_ID=$CLIENT_ID --publish 5000:80 ohif/viewer:latest
```