serviço de acesso ao localStorage

localStorageAPI.js

angular.module('starter.services', [])

.service('$storage', function () {
  this.get = function (key) {
    var arrK = key.split('.'),
        first = arrK.shift(),
        result = JSON.parse(localStorage.getItem(first));

    if (arrK.length === 0) {
      return result;
    }

    for (k in arrK) {
      if (result[arrK[k]] == undefined) return undefined;
      result = result[arrK[k]];
    }

    return result;
  };

  this.set = function (key, value) {
    var arrK  = key.split('.'),
        first = arrK.shift(),
        nObj  = {},
        pice;

    if (arrK.length === 0) {
      localStorage.setItem(key, JSON.stringify(value));
      return true;
    }

    pice = nObj;

    for (k in arrK) {
      pice[arrK[k]] = value;
      pice = pice[arrK[k]];
    }

    var obj1 = this.get(first),
        obj3 = {};

    for (var k in obj1) { obj3[k] = obj1[k]; }
    for (var k in nObj) { obj3[k] = nObj[k]; }

    localStorage.setItem(first, JSON.stringify(obj3));
    return true;
  };

  this.remove = function (key) {
    var arrK = key.split('.'),
        last = arrK.pop();

    if (arrK.length === 0) {
      localStorage.removeItem(key);
      return true;
    }

    var obj = this.get(arrK.join('.'));

    delete obj[last];

    this.set(arrK.join('.'), obj);

    return true;
  };

  this.destroy = function () {
    localStorage.clear();
  };
})