feat(chat): add local-first conversation workspace

chat/lib/repository-push-batches.ts

@@ -0,0 +1,21 @@
+import type {RepositoryRefUpdate, StoredChatMessage} from "./conversation-types";
+
+export type RepositoryPushPayload = {
+  repositoryId: string;
+  objects: StoredChatMessage[];
+  refs: RepositoryRefUpdate[];
+};
+
+function chunks<T>(items: T[], size: number) {
+  const result: T[][] = [];
+  for (let index = 0; index < items.length; index += size) result.push(items.slice(index, index + size));
+  return result;
+}
+
+export function repositoryPushBatches(payload: RepositoryPushPayload) {
+  const objectBatches = chunks([...new Map(payload.objects.map((object) => [object.id, object])).values()], 1000)
+    .map((objects) => ({repositoryId: payload.repositoryId, objects, refs: [] as RepositoryRefUpdate[]}));
+  const refBatches = chunks(payload.refs, 100)
+    .map((refs) => ({repositoryId: payload.repositoryId, objects: [] as StoredChatMessage[], refs}));
+  return [...objectBatches, ...refBatches];
+}