Better handling of evaluation error objects

Author: preston

src/extractors/evaluation-error-extractor.ts

@@ -1,9 +1,19 @@
 import { BaseExtractor } from './base-extractor.js';
 
+function operationOutcomeMessage(resource: any): string {
+	const issue = resource?.issue?.[0];
+	const fromIssue =
+		issue?.details?.text ?? issue?.diagnostics ?? (issue != null ? JSON.stringify(issue) : undefined);
+	if (fromIssue != null) {
+		return fromIssue;
+	}
+	return resource != null ? JSON.stringify(resource) : 'unknown';
+}
+
 export class EvaluationErrorExtractor extends BaseExtractor {
 	protected _process(parameter: any): any {
 		if (parameter.name === 'evaluation error') {
-			return `EvaluationError:${parameter.resource.issue[0].details.text}`;
+			return `EvaluationError:${operationOutcomeMessage(parameter.resource)}`;
 		}
 
 		return undefined;