SDC-Assemble

A Typescript reference implementation of the $assemble operation from the HL7 FHIR Structured Data Capture Specification and is designed for Modular Questionnaires.

Usage

You would need to implement the following interfaces:

``InputParameters` - Input parameters for the $assemble operation

`ts
{
resourceType: 'Parameters'
parameter: [
{
name: 'questionnaire',
resource: YOUR_QUESTIONNAIRE_RESOURCE
}
]
}
`



`FetchQuestionnaireCallback` - A callback to fetch resources from your FHIR server

`ts
function fetchQuestionnaireCallback (canonicalUrl: string, requestConfig: any) {
const { endpoint, token } = requestConfig;
return axios.get(${endpoint}/Questionnaire?url=${canonicalUrl}, {
method: 'GET',
headers: { Accept: 'application/json+fhir; charset=utf-8', Authorization: Bearer ${token}, }
});
};
`

Both of these interfaces are required to be implemented as arguments to the `assemble()` function.

$3

It's recommended to run this library within a web app or a service if you're doing local development.
This library compiles to both CommonJS and ES Modules, so there is no problems in using it across web frameworks and Node-based backends.

To compile the code, use npm run compile.
To watch for changes, use npm run watch.

Note: Do not use tsc or tsc -w` as it will only compile to ES Modules, which means it will not work with CommonJS-based implementations.

Sample implementation

We have used this module as a microservice in our forms server https://smartforms.csiro.au/api/fhir/Questionnaire/$assemble.

A sample implementation can be found here