Function getChannelInfo

server/src/slack/client.ts:673–707

(channelId: string)

 * Get channel info by ID (cached for 30 minutes)
 */
export async function getChannelInfo(channelId: string): Promise<SlackChannel | null> {
  const now = Date.now();

  // Check cache
  const cached = channelCache.get(channelId);
  if (cached && cached.expiresAt > now) {
    return cached.channel;
  }

  try {
    const response = await slackRequest<{ channel: SlackChannel }>('conversations.info', {
      channel: channelId,
    });

    // Evict oldest entry if cache is full
    if (channelCache.size >= MAX_CHANNEL_CACHE_SIZE) {
      const oldestKey = channelCache.keys().next().value;
      if (oldestKey) {
        channelCache.delete(oldestKey);
      }
    }

    // Cache the result
    channelCache.set(channelId, {
      channel: response.channel,
      expiresAt: now + CHANNEL_CACHE_TTL_MS,
    });

    return response.channel;
  } catch (error) {
    const safeId = channelId.replace(/[^A-Za-z0-9]/g, '');
    logger.warn({ error, channelId }, `Failed to get channel info for ${safeId}`);
    return null;
  }
}

/**
 * Get members of a channel