// SPDX-FileCopyrightText: Copyright Orangebot, Inc. and Medplum contributors
// SPDX-License-Identifier: Apache-2.0
import { getSearchParameters } from '@medplum/core';
import type { SearchParameter } from '@medplum/fhirtypes';
/**
* Derives an "identifier" search parameter from a reference search parameter.
*
* FHIR references can have an "identifier" property.
*
* Any FHIR reference search parameter can be used to search for resources with an identifier.
*
* However, the FHIR specification does not define an "identifier" search parameter for every resource type.
*
* This function derives an "identifier" search parameter from a reference search parameter.
* @param inputParam - The original reference search parameter.
* @returns The derived "identifier" search parameter.
*/
export function deriveIdentifierSearchParameter(inputParam: SearchParameter): SearchParameter {
return {
resourceType: 'SearchParameter',
code: inputParam.code + ':identifier',
base: inputParam.base,
type: 'token',
expression: `(${inputParam.expression}).identifier`,
} as SearchParameter;
}
function getDerivedSearchParameters(searchParams: SearchParameter[]): SearchParameter[] {
const result: SearchParameter[] = [];
for (const searchParameter of searchParams) {
if (searchParameter.type === 'reference') {
result.push(deriveIdentifierSearchParameter(searchParameter));
}
}
return result;
}
/**
* Returns all search parameters for a resource type, including both standard and derived parameters.
* @param resourceType - The FHIR resource type.
* @returns Array of SearchParameters including both standard and derived parameters.
*/
export function getStandardAndDerivedSearchParameters(resourceType: string): SearchParameter[] {
const standardParams = Object.values(getSearchParameters(resourceType) ?? {});
const derivedParams = getDerivedSearchParameters(standardParams);
return [...standardParams, ...derivedParams];
}
