identity/initializers/session.js

Identity client

exports.session = function(api, next){

  var config = api.config.identity;  
  if(!config){
    return next();
  }
  

  //Load the session
  api.actions.addPreProcessor(function(connection, actionTemplate, next){    
    var key = config.session_prefix + connection.id.split('-')[0];
    var User = api.identity.store.Model('User');

    //load from actionhero cache
    api.cache.load(key, function(error, session){
      session = session || {};  
      
      //if there is a user on the connection - use it instead  
      var user_data = connection.user || session.user;

      //put all data on the connection object
      if(user_data){
        connection.user = User.new(user_data);
        session.user = user_data;
      }
      
      if(connection.session_tmp === true){
        session.__tmp = true;
      }

      connection.session = session;
      connection.session_hash = objectHash(session);
      next(connection, true);
    });
  }, 50);
  
  
  
  
  // Postprocessor to save the session
  api.actions.addPostProcessor(function(connection, actionTemplate, toRender, next){
    if(connection.session){
      var key = config.session_prefix + connection.id.split('-')[0];

      if(!connection.session.__destroy){
        //only save non temporary sessions

        if(connection.session.__tmp !== true){
          var hash = objectHash(connection.session);
          
          if(hash === connection.session_hash){
            return next(connection, toRender);
          }
          
          api.cache.save(key, connection.session, 60 * 60 * 24 * 7 * 1000, function(error, session){
            //TODO: error handling...
            next(connection, toRender);
          });
        }else{
          next(connection, toRender);
        }        
      }else{
        api.cache.destroy(key, function(error){
          //TODO: error handling...
          next(connection, toRender);
        });
      }      
    }else{
      next(connection, toRender);
    } 
  });
  
  
  
  next();
  
};


function objectHash(obj){
  if(!obj) return null;
  return JSON.stringify(obj)
  .split('')
  .reduce(function(a,b){
    a=((a<<5)-a)+b.charCodeAt(0);
    return a&a
  },0);
}