Function getThreadReference

desktop/src/features/messages/lib/threading.ts:25–52

(tags: string[][])

}

export function getThreadReference(tags: string[][]): ThreadReference {
  const eventTags = getEventTags(tags);

  if (eventTags.length === 0) {
    return {
      parentId: null,
      rootId: null,
    };
  }

  const rootTag = eventTags.find((tag) => tag[3] === "root");
  const replyTag =
    [...eventTags].reverse().find((tag) => tag[3] === "reply") ?? null;

  if (!replyTag) {
    return {
      parentId: null,
      rootId: null,
    };
  }

  const parentId = replyTag[1] ?? null;

  return {
    parentId,
    rootId: rootTag?.[1] ?? parentId,
  };
}

/**
 * Best-effort client-side normalization of mention pubkeys: lowercase, deduplicate, skip self.