Is there a way to convert an object key containing an array to an object?

Issue

Here is my current object:

{"or_11[and_3][gt@last_closed_sr]":"2019-06-18"}

I would like it to look like:

{
  "or_11": {
    "and_3": {
      "gt@last_closed_sr": "2019-06-18",
    }
  }
}

What is the best way to do this?

Solution

In general the answer to poorly formatted data is to fix the formatter, not to implement a parser. However, I've worked with systems that encode data like that, so here's a parser.

function parseSquareSeparatedData(data) {
  const result = {};

  Object.keys(data).forEach((key) => {
    const keyParts = key.replace(/]/g, "").split("[");
    const last = keyParts.pop();
    let resultPointer = result;
    keyParts.forEach((keyPart) => {
      if (!(keyPart in resultPointer)) {
        resultPointer[keyPart] = {};
      }
      resultPointer = resultPointer[keyPart];
    })
    resultPointer[last] = input[key];
  })

  return result;
}

Answered By - Charlie Bamford