Structure flattening/consolidation

[Mat Brady]

Was wondering if you knew of a way to express flattening and consolidating a JSON data structure with how your script is currently implemented. Instead of mapping actual data, the goal is to essentially map schema. For example, I have a current schema which includes keys to express the types of nested data.

original schema

{
  history: {
    approved: {
      modification: [
        {
          dateTime: "",
          userDisplayName: "",
          userDn: ""
        }
      ]
    },
    broughtUnderEdit: {
      modification: [
        {
          dateTime: "",
          userDisplayName: "",
          userDn: ""
        }
      ]
    },
    changed: {
      modification: [
        {
          dateTime: "",
          userDisplayName: "",
          userDn: ""
        }
      ]
    },
    created: {
      dateTime: "",
      userDisplayName: "",
      userDn: ""
    },
    projectId: "",
    projectName: "",
    projectType: ""
  }
}

The goal is to reduce the levels of data hierarchy and create a result like this:

{
  "history": [
    { 
      "projectId": "",
      "projectName": "",
      "projectType": "",
      "dateTime":"",
      "type": ["approved", "broughtUnderEdit", "changed", "created"],
      "userDisplayName": "",
      "userDn": ""
    }
  ]
}

The closest thing I can create relies heavily on rewriting the value and doesn't explicitly define the mapping of all the keys other than approved. Here's the example:

const flattened = mapping.map(orig, [
  {
    oldKey: "history.approved.modification[0]",
    newKey: "history",
    values: [
      {
        oldValue: orig.history.approved.modification[0],
        newValue: [
          _.merge(orig.history.approved.modification[0], {
            type: ["approved", "changed", "broughtUnderEdit", "created"],
            projectId: orig.history.projectId,
            projectName: orig.history.projectName,
            projectType: orig.history.projectType
          })
        ]
      }
    ]
  }
]);

I'm thinking the answer is no but was curious if you knew a way to make it work without modifying the code. Thanks for any input!

There's also a sandbox here: https://codesandbox.io/embed/k9rmnlwmm7