Update automatically loaded dependencies (#153)

* Update automatic dependencies loaded based on FHIR version

* Minor refactor

* Simplify FHIR version matching logic

src/utils/FSHHelpers.js

@@ -242,18 +242,14 @@ function addCoreFHIRVersionAndAutomaticDependencies(dependencies, coreFHIRVersio
   if (!hasCoreFHIR) {
     dependenciesToAdd.push(coreFHIRPackage);
   }
-  const terminologyPkg = { packageId: 'hl7.terminology.r4', version: 'latest', isAutomatic: true };
-  const hasTerminology = hasDependency(dependencies, terminologyPkg, true);
-  if (!hasTerminology) {
-    dependenciesToAdd.push(terminologyPkg);
-  }
-  if (coreFHIRPackage.version.match(/^5\.0\.\d+$/)) {
-    const extensionPkg = { packageId: 'hl7.fhir.uv.extensions', version: 'latest', isAutomatic: true };
-    const hasExtensions = hasDependency(dependencies, extensionPkg, true);
-    if (!hasExtensions) {
-      dependenciesToAdd.push(extensionPkg);
+  AUTOMATIC_DEPENDENCIES.filter(
+    (dep) => dep.fhirVersions == null || dep.fhirVersions.some((v) => coreFHIRPackage.version.startsWith(v))
+  ).forEach((dep) => {
+    const dependencyToAdd = { packageId: dep.packageId, version: dep.version, isAutomatic: true };
+    if (!hasDependency(dependencies, dependencyToAdd, true)) {
+      dependenciesToAdd.push(dependencyToAdd);
     }
-  }
+  });
   return dependenciesToAdd;
 }
 
@@ -275,3 +271,30 @@ export function getCoreFHIRPackageIdentifier(fhirVersion) {
     return `hl7.fhir.r4.core`;
   }
 }
+
+const AUTOMATIC_DEPENDENCIES = [
+  {
+    packageId: 'hl7.fhir.uv.tools',
+    version: 'latest'
+  },
+  {
+    packageId: 'hl7.terminology.r4',
+    version: 'latest',
+    fhirVersions: ['4.0', '4.3']
+  },
+  {
+    packageId: 'hl7.terminology.r5',
+    version: 'latest',
+    fhirVersions: ['5.0']
+  },
+  {
+    packageId: 'hl7.fhir.uv.extensions.r4',
+    version: 'latest',
+    fhirVersions: ['4.0', '4.3']
+  },
+  {
+    packageId: 'hl7.fhir.uv.extensions.r5',
+    version: 'latest',
+    fhirVersions: ['5.0']
+  }
+];