openclaw/extensions/slack/src/reply-blocks.ts

import type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
import { parseSlackBlocksInput, SLACK_MAX_BLOCKS } from "./blocks-input.js";
import {
  buildSlackInteractiveBlocks,
  buildSlackPresentationBlocks,
  resolveSlackInteractiveBlockOffsets,
  type SlackBlock,
} from "./blocks-render.js";

export function resolveSlackReplyBlocks(payload: ReplyPayload): SlackBlock[] | undefined {
  const slackData = payload.channelData?.slack;
  let channelBlocks: SlackBlock[] = [];
  if (slackData && typeof slackData === "object" && !Array.isArray(slackData)) {
    channelBlocks =
      (parseSlackBlocksInput((slackData as { blocks?: unknown }).blocks) as SlackBlock[]) ?? [];
  }
  const presentationBlocks = buildSlackPresentationBlocks(
    payload.presentation,
    resolveSlackInteractiveBlockOffsets(channelBlocks),
  );
  const interactiveBlocks = buildSlackInteractiveBlocks(
    payload.interactive,
    resolveSlackInteractiveBlockOffsets([...channelBlocks, ...presentationBlocks]),
  );
  const blocks = [...channelBlocks, ...presentationBlocks, ...interactiveBlocks];
  if (blocks.length > SLACK_MAX_BLOCKS) {
    throw new Error(
      `Slack blocks cannot exceed ${SLACK_MAX_BLOCKS} items after interactive render`,
    );
  }
  return blocks.length > 0 ? blocks : undefined;
}