Use lodash to inflate a flattened JSON object expressed as path, value, type triplets

flatJSON.js

export class FlatJSON {

  /* @ngInject */
  constructor() {
    console.log("FlatJSON Service Init")
    console.debug("FlatJSON running tests...")
    this.test();
  }

  toJSON(keys) {
    var o = keys.reduce( (a,pair) => {
      switch (pair.type) {
        case 'string' : { pair.value = pair.value.toString(); break;}
        case 'number' : { pair.value = parseInt(pair.value); break;}
        case 'null' : { pair.value = null; break;}
        case 'boolean' : { pair.value = (pair.value=='true'); break;}
      }
      _.set(a,pair.key, pair.value);
      return a
    },{});
    return o;
  }

  test() {

    let dump = (name, obj) => console.log(name, "->", JSON.stringify(obj,null,2));

    let tests = [
      [],
      [ { key:"order.id",value:"12345678",type:"string" },
        { key:"order.createdDate",value:"2016-07-01",type:"string" },
        { key:"order.jobs[0].id",value:"123",type:"string" },
        { key:"order.jobs[0].submittedDate",value:"2016-07-01",type:"string" },
        { key:"order.jobs[0].product.name",value:"Cool Blue 2016",type:"string" },
        { key:"order.jobs[0].product.brand",value:"Rayban",type:"string" },
        { key:"order.jobs[0].product.quantity",value:"2",type:"number" },
        { key:"order.jobs[0].product.inStock",value:"true",type:"boolean" },
        { key:"order.jobs[1].product.name",value:"Cool Blue 2016",type:"string" },
        { key:"order.jobs[1].product.brand",value:"Rayban",type:"string" },
        { key:"order.jobs[1].product.quantity",value:"7",type:"number" },
        { key:"order.jobs[1].product.inStock",value:"false",type:"boolean" },

      ]
    ]

    tests.forEach((keys,i) => dump(i, this.toJSON(keys)));
    
        // produces this result
    let result = {
      "order": {
        "id": "12345678",
        "createdDate": "2016-07-01",
        "jobs": [
          {
            "id": "123",
            "submittedDate": "2016-07-01",
            "product": {
              "name": "Cool Blue 2016",
              "brand": "Rayban",
              "quantity": 2,
              "inStock": true
            }
          },
          {
            "product": {
              "name": "Cool Blue 2016",
              "brand": "Rayban",
              "quantity": 7,
              "inStock": false
            }
          }
        ]
      }
    }



  }

}