angular-factory-example.js

angular.module('missionhub')
  .factory('personCache', function() {
    // set up variables and constants
    var cachedPeople = {};

    // define methods

    // if you give person() a person object, it will cache it.
    // if you give it an id, it will return a person object if it has it.
    function person(newValue) {
      if (newValue.id) {
        cachedPeople[newValue.id] = cachedPeople[newValue.id] || {}
        angular.extend(cachedPeople[newValue.id], newValue);
        return true;
      }
      return cachedPeople[newValue];
    }

    // return interface
    return {
      person: person
    }
  })