vczero.github.io/tuban/client-admin/js/ngCookies.js

angular.module('ngCookies', ['ng']).
   factory('$cookies', ['$rootScope', '$browser', function($rootScope, $browser) {
      var cookies = {},
          lastCookies = {},
          lastBrowserCookies,
          runEval = false,
          copy = angular.copy,
          isUndefined = angular.isUndefined;

      //creates a poller fn that copies all cookies from the $browser to service & inits the service
      $browser.addPollFn(function() {
        var currentCookies = $browser.cookies();
        if (lastBrowserCookies != currentCookies) { //relies on browser.cookies() impl
          lastBrowserCookies = currentCookies;
          copy(currentCookies, lastCookies);
          copy(currentCookies, cookies);
          if (runEval) $rootScope.$apply();
        }
      })();

      runEval = true;
      $rootScope.$watch(push);

      return cookies;


      /**
       * Pushes all the cookies from the service to the browser and verifies if all cookies were
       * stored.
       */
      function push() {
        var name,
            value,
            browserCookies,
            updated;

        //delete any cookies deleted in $cookies
        for (name in lastCookies) {
          if (isUndefined(cookies[name])) {
            $browser.cookies(name, undefined);
          }
        }

        //update all cookies updated in $cookies
        for (name in cookies) {
          value = cookies[name];
          if (!angular.isString(value)) {
            value = '' + value;
            cookies[name] = value;
          }
          if (value !== lastCookies[name]) {
            $browser.cookies(name, value);
            updated = true;
          }
        }

        //verify what was actually stored
        if (updated) {
          updated = false;
          browserCookies = $browser.cookies();

          for (name in cookies) {
            if (cookies[name] !== browserCookies[name]) {
              //delete or reset all cookies that the browser dropped from $cookies
              if (isUndefined(browserCookies[name])) {
                delete cookies[name];
              } else {
                cookies[name] = browserCookies[name];
              }
              updated = true;
            }
          }
        }
      }
    }]).

   factory('$cookieStore', ['$cookies', function($cookies) {

      return {
        
        get: function(key) {
          var value = $cookies[key];
          return value ? angular.fromJson(value) : value;
        },
        put: function(key, value) {
          $cookies[key] = angular.toJson(value);
        },
        remove: function(key) {
          delete $cookies[key];
        }
      };

    }]);