<?php

namespace Tools;

/**
 * Module superclass
 * Contains all informations about the module
**/
abstract class AModule
{
    /**
     * @var \Tools\Context $context
     * /core/tools/Context.php
     * Website context
     * Can be accessed read-only
    **/
    private $context;

    /**
     * @var Module database object
    **/
    private $entity;

    /**
     * Called on module install
     * Should register shortcodes and Hooks
    **/
    public abstract function install();

    /**
     * Called on module unsinstall
    **/
    public function uninstall()
    { }

    /**
     * @param \Tools\HookEvent $event called hook
     * /core/tools/HookEvent.php
     * Called on hook reception
    **/
    public abstract function doAction($event);

    /**
     * @param string $shortCode
     * @param array ( key => value ) shortcode's parameters
     * Called on shortcode reception
    **/
    public abstract function doShortCode($shortCode, $params);

    /**
     * @param \Tools\Context $context
     * /core/tools/Context.php
     * set the application context
     * Will work only one time
    **/
    public function setContext($context)
    {
        if ($this->context === null)
            $this->context = $context;
    }

    /**
     * @param \Entity\Module $module
     * /core/models/Module.php
     * set the module database object
     * Will work only one time
    **/
    public function setEntity($entity)
    {
        if ($this->entity === null)
            $this->entity = $entity;
    }

	/**
	 * Register hook to be triggered
	 * Can only be triggered while module setup
	**/
    public static function registerHook($hookName)
    {
        $this->context->hooks->register($this, $hookname);
    }

	/**
	 * Getter
	**/
    public function __get($key)
    {
        switch ($key)
        {
            case "context": return $this->context; break;
            case "entity": return $this->entity; break;
        }
        throw new \Exception("Cannot access attribute {$key}");
    }
}