<?php

class ModuleType
{
	const System = 0;
	const Normal = 1;
	const Application = 2;
}

class AppModule
{
  var $Id;
  var $Name;
  var $Version;
  var $License; 
  var $Creator;
  var $Description;
  var $Installed;
  var $InstalledVersion;
  var $Running;
  /** @var ModuleType */
  var $Type;
  var $Enabled;
  var $Dependencies;
  /** @var Database */
  var $Database;
  /** @var System */
  var $System;
  /** @var ModularSystem */
  var $Manager;
  var $OnChange;
  
  function __construct($System)
  {
    $this->System = &$System;
    $this->Database = &$System->Database;
    $this->Installed = false;
    $this->Dependencies = array();
    $this->Type = ModuleType::Normal;
  }
  
  function Install()
  {
  }
  
  function Uninstall()
  {
  }
  
  function Start()
  {
  }
  
  function Stop()
  {
  } 
}

class AppModuleManager 
{
  var $Modules;
  var $System;
  var $OnLoadModules;
  
  function __construct($System)
  {
    $this->Modules = array();
    $this->System = &$System;      
  }
  
  function StartAll()
  {
    foreach($this->Modules as $Index => $Module)
    {
      //DebugLog('Init module '.$Module->Name);
      $this->Modules[$Index]->Start();
    }
  }

  function StopAll()
  {
    foreach($this->Modules as $Index => $Module)
    {
      //DebugLog('Init module '.$Module->Name);
      $this->Modules[$Index]->Stop();
    }
  }
  
  function ModulePresent($Name)
  {
    return(array_key_exists($Name, $this->Modules));
  }
  
  function RegisterModule(AppModule $Module)
  {
    $this->Modules[$Module->Name] = &$Module;  
    $Module->Manager = &$this;
    $Module->OnChange = &$this->OnModuleChange;
  }
  
  function UnregisterModule($Module)
  {
    unset($this->Modules[array_search($Module, $this->Modules)]);  
  }
  
  /* @return Module */
  function SearchModuleById($Id)
  {
    foreach($this->Modules as $Module)
    {
      //DebugLog($Module->Name.' '.$Module->Id);
      if($Module->Id == $Id) return($Module->Name);
    }
    return('');
  }

  function LoadModulesFromDir($Directory)
  {
  	$List = scandir($Directory);
  	foreach($List as $Item)
  	{
  	  if(is_dir($Directory.'/'.$Item) and ($Item != '.') and ($Item != '..'))
  	  {  	  	
  	  	include_once($Directory.'/'.$Item.'/'.$Item.'.php');
  	  	$ModuleName = 'Module'.$Item;
  	  	$this->RegisterModule(new $ModuleName($this->System));
  	  }
  	}
  }
  
  function LoadModules()
  {
  	if(method_exists($this->OnLoadModules[0], $this->OnLoadModules[1]))
  		$this->OnLoadModules();
  	else $this->LoadModulesFromDir(dirname(__FILE__).'/../Modules');
  }
}