# Google Cloud Healthcare

> ATTENTION: The original documentation for this integration lives in the legacy
> `version 1` Meteor documentation. You can
> [find it here](/history/v1/connecting-to-image-archives/google-cloud-healthcare.html).
> These docs will mirror the Meteor documentation until our `React`
> implementation has been updated to work with 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. The Cloud
Healthcare API is a very attractive option because it allows us to avoid
deploying the Meteor server entirely. We can just deploy OHIF as a client-only
static site application.

## 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 `_oauth/google` (e.g.
    `http://localhost:3000/_oauth/google`) 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/oidc-googleCloud.json` file and change `YOURCLIENTID` to
   your Client ID value.
1. Run the OHIF Viewer using the oidc-googleCloud.json configuration file

```bash
cd OHIFViewer
METEOR_PACKAGE_DIRS="../Packages" meteor npm install
METEOR_PACKAGE_DIRS="../Packages" meteor --settings ../config/oidc-googleCloud.json
```

## Running via Docker

OHIF is also providing a Docker container which can connect to Google Cloud
Healthcare with a Client ID which is provided at runtime. This is a very simple
method to get up and running. Internally, the container is running
[Nginx](https://nginx.org/) to serve the
[Standalone Viewer](../standalone-viewer/usage.md).

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 3000:80 ohif/viewer-google-cloud:latest
```

## Building the ohif/viewer-google-cloud Docker Image

The
[ohif/viewer-google-cloud](https://cloud.docker.com/u/ohif/repository/docker/ohif/viewer-google-cloud)
Docker image is built as follows. The Dockerfile and nginx.conf are in the
`/dockersupport/viewer-google-cloud` folder.

1. [Install Meteor](https://www.meteor.com/install)
1. Clone the repository

```bash
git clone https://github.com/OHIF/Viewers.git
cd Viewers
```

1. Install meteor-build-client-fixed2 so you can build the Standalone Viewer

```bash
npm install -g meteor-build-client-fixed2
```

1. Build the Standalone client-only OHIF Viewer

```bash
cd OHIFViewer/
METEOR_PACKAGE_DIRS="../Packages" meteor npm install
METEOR_PACKAGE_DIRS="../Packages" meteor-build-client-fixed2 ../dockersupport/viewer-google-cloud/build -s ../config/oidc.json
```

1. Build the Docker image

```bash
cd ../dockersupport/viewer-google-cloud
docker build -t ohif/viewer-google-cloud .
```

1. Run the Docker image using an OAuth Client ID

```bash
docker run --env CLIENT_ID={$someID}.apps.googleusercontent.com --publish 3000:80 ohif/viewer-google-cloud
```
