A SMART app for FHIR SDC Questionnaire

This is a SMART app that can be used in EHR (electonic health record) systems supporting SMART on FHIR to display FHIR SDC Questionnaire forms and collect data as FHIR QuestionnaireResponse resources.

Demo

A demo of this app can be launched via SMART on FHIR from the LHC FHIR Tools website. It can also be used without SMART, by going to it directly, in which can you can enter the base URL of a FHIR server to which you want the app to connect. The source files from which the demo is built are on the master branch. See "Customizing the App" below if you wish customize or build your own copy.

The app relies on the LHC-Forms rendering widget for displaying forms. It has partial support for FHIR Questionnaires (versions STU3 and R4) and the Structured Data Capture Implementation Guide.

For some sample forms to try, this repository comes with some forms under e2e-test/data which are used by the test code to test the app. The FHIR server connected to by the SMART App gets reset weekly, but you can use the Upload button to upload a new Questionnaire resource. If downloading one of the forms from GitHub, be sure click on the "Raw" button, which will open a page which only has the Questionnaire data. For example: https://raw.githubusercontent.com/lhncbc/lforms-fhir-app/master/e2e-tests/data/R4/vital-sign-questionnaire.json will open a page for a vital signs Questionnaire which you can save to a local file and then use "Upload" to use it in the app.

Customizing the App

If you wish to install and build the app locally so that you can customize it, see below. Note that adding support for additional parts of the SDC specification will require edits to the LHC-Forms widget. (Pull requests are very welcome, but it might be better to open an issue first to see if we are already working on that feature.)

Add Node.js and npm to your path

The file bashrc.lforms-fhir-app specifies the version of Node.js we are using for development. Download that version of Node.js, and add its bin directory to your path.

Install Dependencies

We have two kinds of dependencies in this project: tools and Angular framework code. The tools help us manage and test the application.

• We get the tools we depend upon via npm, the Node package manager (npm).
• We get the Angular code via bower, a client-side code package manager (bower).
• In order to run the end-to-end tests, you will also need to have the Java Development Kit (JDK) installed on your machine. Check out the section on end-to-end testing for more info.

We have configured npm to automatically run bower so we can simply do:

npm ci

Behind the scenes this will also call bower install. After that, you should find out that you have two new folders in your project.

• node_modules - contains the npm packages for the tools we need
• app/bower_components - contains the Angular framework files

Add node_modules/.bin to your path.

Build the application

npm run build

This will create files for production in a "dist" directory, but will also copy some needed files into place from node_modules.

Run the Application

npm run start

will start an http server running at port 8000. Or, for testing the production build,

npm run start-dist

will start a server on port 8000 that serves the files in dist.

Now browse to the app at localhost:8000/lforms-fhir-app/.

Running Tests (including End-to-End Tests)

npm run test

will run the tests.

For testing the production build in dist, run

npm run test-dist