Proposal: JMESPath / FlatMap Middleware [Needs +1s]

[willfarrell]

Give a thumbs up if this would have value to you.

aws-powertools/powertools-lambda-typescript#508
https://jmespath.org/
https://www.npmjs.com/package/jmespath

PoC

import { search } from 'jmespath'

const defaults = {
  expression: undefined
}

const jmespathMiddleware = (opts) => {
  const {expression} = {...defaults, ...opts}
  
  const jmespathBeforeMiddleware = (request) => {
    request.event = search(request.event, expression)
  }
  
  return {
    before: jmespathBeforeMiddleware
  }
}

export default jmespathMiddleware

• Doc would include JMESPath for all relevant AWS events (See https://awslabs.github.io/aws-lambda-powertools-python/latest/utilities/validation/#built-in-envelopes)

Questions

• apply to event only?
• do you want "envelopes" provided based on the AWS event? (See https://awslabs.github.io/aws-lambda-powertools-python/latest/utilities/validation/#built-in-envelopes)

[willfarrell]

Closing due to lack of interest. Please comment if you'd like us to revisit including this as a core middleware.