SlackでのExperience Platform イベントの監視

const fetch = require("node-fetch");
const { Core } = require("@adobe/aio-sdk");

/**
 * Adobe I/O Events to Slack Runtime Proxy
 *
 * Receives events from Adobe I/O Events and forwards them to Slack.
 * Signature verification and challenge handling are automatic when
 * using Runtime Action registration (non-web action).
 */
async function main(params) {
  const logger = Core.Logger("webhook-proxy", { level: params.LOG_LEVEL || "info" });

  try {
    logger.info(`Event received: ${JSON.stringify(params)}`);

    // Forward to Slack
    return forwardToSlack(params, params.SLACK_WEBHOOK_URL, logger);

  } catch (error) {
    logger.error(`Error: ${error.message}`);
    return { statusCode: 500, body: { error: "Internal server error" } };
  }
}

/**
 * Forwards the event payload to Slack
 */
async function forwardToSlack(payload, webhookUrl, logger) {
  if (!webhookUrl) {
    logger.error("SLACK_WEBHOOK_URL not configured");
    return { statusCode: 500, body: { error: "Server configuration error" } };
  }

  // Extract Adobe headers passed to runtime action
  const headers = {
    "x-adobe-event-code": payload["x-adobe-event-code"],
    "x-adobe-event-id": payload["x-adobe-event-id"],
    "x-adobe-provider": payload["x-adobe-provider"]
  };

  const slackMessage = buildSlackMessage(payload, headers);

  const response = await fetch(webhookUrl, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(slackMessage)
  });

  if (!response.ok) {
    const errorText = await response.text();
    logger.error(`Slack API error: ${response.status} - ${errorText}`);
    return { statusCode: response.status, body: { error: errorText } };
  }

  logger.info("Event forwarded to Slack");
  return { statusCode: 200, body: { success: true } };
}

/**
 * Builds a Slack Block Kit message from the event payload
 */
function buildSlackMessage(payload, headers) {
  // Adobe passes event code as x-adobe-event-code header (available in params for runtime actions)
  const eventType = headers["x-adobe-event-code"] ||
                    payload["x-adobe-event-code"] ||
                    payload.event_code ||
                    payload.type ||
                    payload.event_type ||
                    "Adobe Event";
  const eventId = headers["x-adobe-event-id"] || payload["x-adobe-event-id"] || payload.event_id || payload.id || "N/A";
  const eventData = payload.data || payload.event || payload;

  return {
    blocks: [
      {
        type: "header",
        text: { type: "plain_text", text: `Event: ${eventType}`, emoji: true }
      },
      {
        type: "section",
        fields: formatDataFields(eventData)
      },
      { type: "divider" },
      {
        type: "context",
        elements: [{
          type: "mrkdwn",
          text: `*Event ID:* ${eventId}  |  *Time:* ${new Date().toISOString()}`
        }]
      }
    ]
  };
}

/**
 * Formats event data as Slack mrkdwn fields
 */
function formatDataFields(data, maxFields = 10) {
  if (typeof data !== "object" || data === null) {
    return [{ type: "mrkdwn", text: `*Payload:*\n${String(data)}` }];
  }

  const entries = Object.entries(data);
  if (entries.length === 0) {
    return [{ type: "mrkdwn", text: "_No data provided_" }];
  }

  return entries.slice(0, maxFields).map(([key, value]) => ({
    type: "mrkdwn",
    text: `*${key}:*\n${typeof value === "object" ? `\`\`\`${JSON.stringify(value)}\`\`\`` : value}`
  }));
}

exports.main = main;