Expand path in object

ExpandPathInObject.tsx

export class ExpandFieldException extends Error {}

function expandPath(item: any, path: string): string {
  var selectionRegex = /(^|\?|\.)(.+?)(?=(\?|\.|$))/g
  var filterRegex = /(.+)=\((.+)\)/

  const getItemProperty = (item: any, propertyName: string) => {
    if (!item || !Object.keys(item).includes(propertyName))
      throw new ExpandFieldException(path)
    return item[propertyName]
  }

  var selections = path.match(selectionRegex)
  let currentSelector = item
  selections?.forEach((selection) => {
    switch (selection.charAt(0)) {
      case '.':
        currentSelector = getItemProperty(
          currentSelector,
          selection.substring(1)
        )
        break
      case '?':
        selection = selection.substring(1)
        var filter = selection.match(filterRegex)
        if (filter === null) throw new ExpandFieldException(path)
        const [, filterOn, filterFor] = filter
        currentSelector = (currentSelector as any[]).find(
          (property) => property[filterOn] === filterFor
        )
        break
      default:
        // This should only trigger for the first element at the start of string
        currentSelector = getItemProperty(currentSelector, selection)
        break
    }
  })
  return !!currentSelector ? currentSelector.toString() : ''
}