JS Bin// source https://jsbin.com/huhayuh

get-layer-data.js

// Sample
var layers = [
    {
      name: "Project",
      count: 1
    },
    {
      name: "Node",
      count: 1
    },
    {
      name: "Port",
      count: 1
    },
    {
      name: "Device",
      count: 256
    }
  ];

/* get layer data
 * return data structure: 
 * $nodes = [{name, children: $nodes}]
 * the last layer have not childrean.
 */
function getDataSource(layers) {
  var nextLayer = [];
  var currentLayer = [];
  var layer = 0,
    i = 0;
  for (layer = layers.length - 1; layer >= 0; layer--) {
    var currentLayerInfo = layers[layer];
    for (i = 0; i < currentLayerInfo.count; i++) {
      if (!nextLayer.length) {
        currentLayer.push({
          name: currentLayerInfo.name + i
        });
      } else {
        currentLayer.push({
          name: currentLayerInfo.name + i,
          children: nextLayer
        });
      }
    }
    nextLayer = currentLayer;
    currentLayer = [];
  }
  var result = nextLayer;
  return result;
}

getDataSource(layers);