Solr path hierarchy to Javascript object

toNestedArray

function toNestedArray (data, rootLevel = 0, parentNode) {
  let output = []
  for (var i = 0; i < data.length; i++) {
    var count = data[i].count
    var items = data[i].name.split('/')
    var hasParent = items.length > rootLevel
    if (hasParent) {
      let parent = rootLevel
      ? items.length === rootLevel
        ? null
        : items.slice(0, items.length - 1).join('/') || null
      : items.slice(0, items.length - 1).join('/') || null
      output.push({
        displayName: items.pop(),
        count,
        parent,
        name: data[i].name
      })
    }
  }

  function getNestedChildren (arr, parent) {
    var out = []
    for (let i in arr) {
      if (arr[i].parent === parent) {
        var children = getNestedChildren(arr, arr[i].name)
        if (children.length) {
          arr[i].children = children
        }
        out.push(arr[i])
      }
    }
    return out
  }
  return getNestedChildren(output, parentNode === '' ? null : parentNode)
}