Impersonate meteor user for development

gistfile1.txt

// Server
Meteor.methods({
  /**
   * Login as a userId. Must be an admin.
   */
  impersonate: function (options) {
    var self = this;

    if (Settings.isProduction) {
      var currentUser = Meteor.users.findOne(self.userId);
      if (! currentUser || ! currentUser.admin) {
        throw new Meteor.Error('You do not have permission to add companies.');
      }
    }

    check(options, {
      _id: Match.Optional(String),
      alias: Match.Optional(String)
    });

    return Accounts._loginMethod(this, 'impersonate', arguments, 'impersonate', function () {
      var user = Meteor.users.findOne(options);
      if (! user) throw new Meteor.Error('User not found');

      // Log the current user out.
      currentUser && Accounts._setLoginToken(currentUser._id, self.connection, null);

      return { userId: user._id };
    });
  }
});

// Client

var loginTokenKey = 'Meteor.loginToken',
  loginTokenExpiresKey = 'Meteor.loginTokenExpires';

var impersonate = function (options, callback) {
  Meteor.call('impersonate', options, function (error, result) {
    if (error) {
      callback && callback.apply(this, arguments);
      return;
    }

    // this will update Meteor.user()
    Accounts.connection.setUserId(result.userId);

    // set the login token so fast-render will work
    Meteor._localStorage.setItem(loginTokenKey, result.token);
    Meteor._localStorage.setItem(loginTokenExpiresKey, result.tokenExpires);

    callback && callback.apply(this, arguments);
  });
};