<?php
require_once 'Autoload.php';

class Event{

    static $event_action = array();
    static $subscribers = array();
    static $type = NULL;

    function __construct($event_type, $properties){
        self::$type = $event_type;
        if(!empty($properties) && gettype($properties)=='array'){
            foreach($properties as $property_name => $property_value){
                $this->{$property_name} = $property_value;
            }
        }
    }

    public function dispatch(){
        static::get_subscribers();
        static::notify();
    }

    static function subscribe($event_type, EventObserver $observer){
        if(empty(static::$event_action[$event_type])){
            static::$event_action[$event_type] = array();
        }

        static::$event_action[$event_type][] =  $observer;
    }



    private static function get_subscribers(){
        static::$subscribers = static::$event_action[self::$type];
    }

    private static function notify(){
        if(!empty(static::$subscribers)){
            foreach(static::$subscribers as $subscriber){
                self::exec($subscriber);
            }
        }
    }

    static function exec($subscriber){
        var_dump($subscriber);
        $subscriber->action->__invoke();
    }

}

    class EventObserver{
        public function __construct($action){
            if(!empty($action)){
                $this->action = $action;
            }
        }

        public function notify(){
            $this->action();
        }
    }

?>