feat(Information Extractor Node): Add new simplified AI-node for information extraction (#10149)

packages/@n8n/nodes-langchain/nodes/chains/InformationExtractor/helpers.ts

@@ -0,0 +1,33 @@
+import { z } from 'zod';
+import type { AttributeDefinition } from './types';
+
+function makeAttributeSchema(attributeDefinition: AttributeDefinition, required: boolean = true) {
+	let schema: z.ZodTypeAny;
+
+	if (attributeDefinition.type === 'string') {
+		schema = z.string();
+	} else if (attributeDefinition.type === 'number') {
+		schema = z.number();
+	} else if (attributeDefinition.type === 'boolean') {
+		schema = z.boolean();
+	} else if (attributeDefinition.type === 'date') {
+		schema = z.string().date();
+	} else {
+		schema = z.unknown();
+	}
+
+	if (!required) {
+		schema = schema.optional();
+	}
+
+	return schema.describe(attributeDefinition.description);
+}
+
+export function makeZodSchemaFromAttributes(attributes: AttributeDefinition[]) {
+	const schemaEntries = attributes.map((attr) => [
+		attr.name,
+		makeAttributeSchema(attr, attr.required),
+	]);
+
+	return z.object(Object.fromEntries(schemaEntries));
+}