I want to transform a nested JS object in AST structure into another using mappings, It can be any level deep. Any help is deeply appreciated. We can use lodash as well if that is convenient.

Motivation :- Supply data can be in several formats, I need to create standard products using different supply objects, for which we can create standard product model and several mappings for product model to supply.

If you think this problem can be solved with a better data modeling of product model or map model, I 'll highly appreciate the suggestions. The supply model is fixed nonetheless.

Data

const source = {
  a:1,
  b:2,
  c:7,
  children:[
    {
      a:3,
      b:7,
      d:8,
      children: [
        {
          a:6,
          b:8,
          x:4
        }
      ]
    },
    {
      a:5,
      b:3,
      c:9
    }
  ]
}

Mappings

const map = {
  c:'a',
  d:'b',
  elements: {
    identifier:'children', // which field to lookout for children
    ofType: 'map' // every child has similar structure as parent
  }
}

Here is the output i am expecting

const output = {
  c:1,
  d:2,
  elements:[
    {
      c:3,
      d:7,
      elements:[
        {
          c:6,
          d:8
        }
      ]
    },
    {
      c:5,
      d:3
    }
  ]
}