@middy/sqs-json-body-parser/index.js

SQS batch json body parser middleware for the middy framework

"use strict";

const {
  jsonSafeParse
} = require('@middy/util');

const defaults = {
  reviver: undefined
};

const sqsJsonBodyParserMiddleware = (opts = {}) => {
  const options = { ...defaults,
    ...opts
  };

  const parseEvent = event => {
    const records = event === null || event === void 0 ? void 0 : event.Records;
    if (!Array.isArray(records)) return;

    for (const record of records) {
      if (record.eventSource === 'aws:sqs') {
        record.body = jsonSafeParse(record.body, options.reviver);
      } else if (record.EventSource === 'aws:sns') {
        parseEvent(record.Sns.Message);
      }
    }
  };

  const sqsJsonBodyParserMiddlewareBefore = async request => {
    parseEvent(request.event);
  };

  return {
    before: sqsJsonBodyParserMiddlewareBefore
  };
};

module.exports = sqsJsonBodyParserMiddleware;