From 4b2715dddbe1d1ed2a0fe781c307dcf37a545071 Mon Sep 17 00:00:00 2001
From: Marc-Antoine Parent <maparent@acm.org>
Date: Thu, 9 Jul 2026 20:19:59 -0400
Subject: [PATCH] eng-2018-add-converter-for-relations

---
 .../database/src/lib/crossAppConverters.ts    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/packages/database/src/lib/crossAppConverters.ts b/packages/database/src/lib/crossAppConverters.ts
index 4d0f35110..76ead0be6 100644
--- a/packages/database/src/lib/crossAppConverters.ts
+++ b/packages/database/src/lib/crossAppConverters.ts
@@ -5,6 +5,7 @@ import {
   CrossAppNodeSchema,
   CrossAppRelationTypeSchema,
   CrossAppRelationTripleSchema,
+  CrossAppRelation,
 } from "../crossAppContracts";
 import { LocalContentDataInput, LocalConceptDataInput } from "../inputTypes";
 import { Enums, CompositeTypes } from "../dbTypes";
@@ -155,3 +156,21 @@ export const crossAppRelationTripleSchemaToDbConcept = ({
     last_modified: node.modifiedAt?.toISOString(),
   });
 };
+
+export const crossAppRelationToDbConcept = (
+  node: CrossAppRelation,
+): LocalConceptDataInput => {
+  return filterUndefined<LocalConceptDataInput>({
+    // use LocalIds... not ideal
+    name: `${node.localId}: ${node.source} -${node.relationType}-> ${node.destination}`,
+    source_local_id: node.localId,
+    author_local_id: node.authorId,
+    schema_represented_by_local_id: node.relationType,
+    local_reference_content: {
+      source: node.source,
+      destination: node.destination,
+    },
+    created: node.createdAt?.toISOString(),
+    last_modified: node.modifiedAt?.toISOString(),
+  });
+};