<?php
/**************************************************************************\
* eGroupWare                                                               *
* http://www.egroupware.org                                                *
* --------------------------------------------                             *
*  This program is free software; you can redistribute it and/or modify it *
*  under the terms of the GNU General Public License as published by the   *
*  Free Software Foundation; either version 2 of the License, or (at your  *
*  option) any later version.                                              *
\**************************************************************************/

/**
 * Provê objetos de multipropósito do Workflow
 * @author Sidnei Augusto Drovetto Jr. - drovetto@gmail.com
 * @author Pedro Eugenio Rocha - pedro.eugenio.rocha@gmail.com
 * @version 1.0
 * @package Workflow
 * @license http://www.gnu.org/copyleft/gpl.html GPL
 */
class WorkflowObjects
{
	/**
	 * @var array $cache Cache de objetos
	 * @access private
	 */
	private $cache = array();

	/**
	 * TODO We should remove this method..
	 * Monta o ambiente requerido pelos métodos (somente se for necessário)
	 * @param bool $requireGalaxia Indica que os métodos da engine Galaxia são necessários
	 * @return void
	 * @access public
	 */
	private function assureEnvironment($requireGalaxia = true)
	{
		if (!defined('PHPGW_API_INC'))
			define('PHPGW_API_INC', dirname(__FILE__) . '/../../phpgwapi/inc');

		if ($requireGalaxia)
		{
			if (!function_exists('galaxia_get_config_values'))
			{
				require_once 'engine/config.ajax.inc.php' ;
				require_once 'engine/class.ajax_config.inc.php' ;
			}
		}
	}

	/**
	 * Retorna uma conexão com o banco de dados do Galaxia (normalmente associado ao banco de dados do Expresso (eGroupWare))
	 * @return object O objeto de acesso a banco de dados, já conectado
	 * @access public
	 */
	function &getDBGalaxia()
	{
		if (!isset($this->cache['DBGalaxia']))
		{
			/* make sure the environment is set */
			$this->assureEnvironment();

			/* check if all configuration is OK */
			$dedicatedDB = true;

			/* if any parameter is not set, then we will return expresso database */
			if ((Settings::get('workflow', 'galaxia', 'db', 'name') == '') or
				(Settings::get('workflow', 'galaxia', 'db', 'host') == '') or
				(Settings::get('workflow', 'galaxia', 'db', 'port') == '') or
				(Settings::get('workflow', 'galaxia', 'db', 'user') == '') or
				(Settings::get('workflow', 'galaxia', 'db', 'type') == ''))
				$dedicatedDB = false;

			/* should we connect to a dedicated database? */
			if ($dedicatedDB)
			{
				/* connect to the database */
				$this->cache['DBGalaxia'] = Factory::newInstance('WorkflowWatcher', Factory::newInstance('db'));
				$this->cache['DBGalaxia']->disconnect(); /* for some reason it won't connect to the desired database unless we disconnect it first */
				$this->cache['DBGalaxia']->Halt_On_Error = 'no';
				$this->cache['DBGalaxia']->connect(
					Settings::get('workflow', 'galaxia', 'db', 'name'),
					Settings::get('workflow', 'galaxia', 'db', 'host'),
					Settings::get('workflow', 'galaxia', 'db', 'port'),
					Settings::get('workflow', 'galaxia', 'db', 'user'),
					Settings::get('workflow', 'galaxia', 'db', 'password'),
					Settings::get('workflow', 'galaxia', 'db', 'type')
				);
				Factory::getInstance('WorkflowSecurity')->removeSensitiveInformationFromDatabaseObject($this->cache['DBGalaxia']);
				$this->cache['DBGalaxia']->Link_ID = Factory::newInstance('WorkflowWatcher', $this->cache['DBGalaxia']->Link_ID);
			}
			else
				$this->cache['DBGalaxia'] = &$this->getDBExpresso();
		}

		return $this->cache['DBGalaxia'];
	}

	/**
	 * Retorna uma conexão com o banco de dados do Expresso (eGroupWare)
	 * @return object O objeto de acesso a banco de dados, já conectado
	 * @access public
	 */
	function &getDBExpresso()
	{
		if (!isset($this->cache['DBExpresso']))
		{
			/* make sure the environment is set */
			$this->assureEnvironment(false);

			/* connect to the database */
			$this->cache['DBExpresso'] = Factory::newInstance('WorkflowWatcher', Factory::newInstance('db'));
			$this->cache['DBExpresso']->disconnect(); /* for some reason it won't connect to the desired database unless we disconnect it first */
			$this->cache['DBExpresso']->Halt_On_Error = 'no';
			$this->cache['DBExpresso']->connect(
				Settings::get('expresso', 'db', 'name'),
				Settings::get('expresso', 'db', 'host'),
				Settings::get('expresso', 'db', 'port'),
				Settings::get('expresso', 'db', 'user'),
				Settings::get('expresso', 'db', 'password'),
				Settings::get('expresso', 'db', 'type')
			);
			Factory::getInstance('WorkflowSecurity')->removeSensitiveInformationFromDatabaseObject($this->cache['DBExpresso']);
			$this->cache['DBExpresso']->Link_ID = Factory::newInstance('WorkflowWatcher', $this->cache['DBExpresso']->Link_ID);
		}

		return $this->cache['DBExpresso'];
	}

	/**
	 * Retorna uma conexão com o banco de dados do Workflow
	 * @return object O objeto de acesso a banco de dados, já conectado
	 * @access public
	 */
	function &getDBWorkflow()
	{
		if (!isset($this->cache['DBWorkflow']))
		{
			/* make sure the environment is set */
			$this->assureEnvironment();

			/* connect to the database */
			$this->cache['DBWorkflow'] = Factory::newInstance('WorkflowWatcher', Factory::newInstance('db'));
			$this->cache['DBWorkflow']->disconnect(); /* for some reason it won't connect to the desired database unless we disconnect it first */
			$this->cache['DBWorkflow']->Halt_On_Error = 'no';
			$this->cache['DBWorkflow']->connect(
				Settings::get('workflow', 'db', 'name'),
				Settings::get('workflow', 'db', 'host'),
				Settings::get('workflow', 'db', 'port'),
				Settings::get('workflow', 'db', 'admin_user'),
				Settings::get('workflow', 'db', 'admin_password'),
				Settings::get('workflow', 'db', 'type')
			);
			Factory::getInstance('WorkflowSecurity')->removeSensitiveInformationFromDatabaseObject($this->cache['DBWorkflow']);
			$this->cache['DBWorkflow']->Link_ID = Factory::newInstance('WorkflowWatcher', $this->cache['DBWorkflow']->Link_ID);
		}

		return $this->cache['DBWorkflow'];
	}

	/**
	 * Retorna um recurso de LDAP
	 * @return resource O recurso LDAP
	 * @access public
	 */
	function &getLDAP()
	{
		if (!isset($this->cache['ldap']))
		{
			/* make sure the environment is set */
			$this->assureEnvironment();

			/* which ldap host to connect? */
			$ldapHost = Settings::get('workflow', 'ldap', 'host');
			if (empty($ldapHost))
				$ldapHost = Settings::get('expresso', 'ldap', 'host');

			/* connect to the LDAP server */
			$this->cache['ldap'] = ldap_connect($ldapHost);

			/* configure the connection */
			ldap_set_option($this->cache['ldap'], LDAP_OPT_PROTOCOL_VERSION, 3);
			ldap_set_option($this->cache['ldap'], LDAP_OPT_REFERRALS, (Settings::get('workflow', 'ldap', 'follow_referrals') == 1) ? 1 : 0);

			/* if  username and password are available, bind the connection */
			if ((Settings::get('workflow', 'ldap', 'user') != '') and
				(Settings::get('workflow', 'ldap', 'password') != ''))
				ldap_bind(	$this->cache['ldap'],
							Settings::get('workflow', 'ldap', 'user'),
							Settings::get('workflow', 'ldap', 'password')
							);
		}

		return $this->cache['ldap'];
	}
}
?>