DefaultPlugin.php
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DefaultPlugin.php
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	<?php
	/*
	Copyright (C) 2014-2015, Siemens AG
	Author: Andreas Würl

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	version 2 as published by the Free Software Foundation.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License along
	with this program; if not, write to the Free Software Foundation, Inc.,
	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	*/

	namespace Fossology\Lib\Plugin;

	use Fossology\Lib\Auth\Auth;
	use Fossology\Lib\UI\Component\Menu;
	use Fossology\Lib\UI\Component\MicroMenu;
	use Monolog\Logger;
	use Symfony\Component\DependencyInjection\ContainerBuilder;
	use Symfony\Component\HttpFoundation\Request;
	use Symfony\Component\HttpFoundation\Response;
	use Symfony\Component\HttpFoundation\Session\Session;
	use Twig_Environment;

	abstract class DefaultPlugin implements Plugin
	{
	const PERMISSION = "permission";
	const REQUIRES_LOGIN = "requiresLogin";
	const ENABLE_MENU = "ENABLE_MENU";
	const LEVEL = "level";
	const DEPENDENCIES = "dependencies";
	const INIT_ORDER = "initOrder";
	const MENU_LIST = "menuList";
	const MENU_ORDER = "menuOrder";
	const MENU_TARGET = "menuTarget";
	const TITLE = "title";

	/** @var ContainerBuilder */
	protected $container;
	/** @var Twig_Environment */
	protected $renderer;
	/** @var Session */
	private $session;
	/** @var Logger */
	private $logger;
	/** @var Menu */
	private $menu;
	/** @var MicroMenu */
	protected $microMenu;
	/** @var string */
	private $name;
	/** @var string */
	private $version = "1.0";
	/** @var string */
	private $title;
	/** @var int */
	private $permission = Auth::PERM_NONE;
	/** @var int */
	private $requiresLogin = true;
	/** @var int */
	private $PluginLevel = 10;
	/** @var array */
	private $dependencies = array();
	private $InitOrder = 0;

	private $MenuList = NULL;
	private $MenuOrder = 0;
	private $MenuTarget = NULL;

	public function __construct($name, $parameters = array())
	{
	if ($name === null \|\| $name === "")
	{
	throw new \InvalidArgumentException("plugin requires a name");
	}
	$this->name = $name;
	foreach ($parameters as $key => $value)
	{
	$this->setParameter($key, $value);
	}

	global $container;
	$this->container = $container;
	$this->session = $this->getObject('session');
	$this->renderer = $this->getObject('twig.environment');
	$this->logger = $this->getObject('logger');
	$this->menu = $this->getObject('ui.component.menu');
	$this->microMenu = $this->getObject('ui.component.micromenu');
	}

	private function setParameter($key, $value)
	{
	switch ($key)
	{
	case self::TITLE:
	$this->title = $value;
	break;

	case self::PERMISSION:
	$this->permission = $value;
	break;

	case self::REQUIRES_LOGIN:
	$this->requiresLogin = $value;
	break;

	case self::LEVEL:
	$this->PluginLevel = $value;
	break;

	case self::DEPENDENCIES:
	$this->dependencies = $value;
	break;

	case self::INIT_ORDER:
	$this->InitOrder = $value;
	break;

	case self::MENU_LIST:
	$this->MenuList = $value;
	break;

	case self::MENU_ORDER:
	$this->MenuOrder = $value;
	break;

	case self::MENU_TARGET:
	$this->MenuTarget = $value;
	break;

	default:
	throw new \Exception("unhandled parameter $key in module " . $this->name);
	}
	}

	/**
	* @return string
	*/
	public function getName()
	{
	return $this->name;
	}

	/**
	* @return string
	*/
	public function getVersion()
	{
	return $this->version;
	}

	/**
	* @return string
	*/
	public function getTitle()
	{
	return $this->title;
	}

	/**
	* @return int
	*/
	public function isRequiresLogin()
	{
	return $this->requiresLogin;
	}

	/**
	* @return array
	*/
	public function getDependency()
	{
	return $this->dependencies;
	}

	/**
	* @return int
	*/
	public function getPluginLevel()
	{
	return $this->PluginLevel;
	}

	/**
	* @return int
	*/
	public function getDBaccess()
	{
	return $this->permission;
	}

	/**
	* @return int
	*/
	public function getState()
	{
	return PLUGIN_STATE_READY;
	}

	/**
	* @return int
	*/
	public function getInitOrder()
	{
	return $this->InitOrder;
	}


	public function getNoMenu()
	{
	return 0;
	}

	/**
	* \brief Customize submenus.
	*/
	protected function RegisterMenus()
	{
	if (isset($this->MenuList) && (!$this->requiresLogin \|\| $this->isLoggedIn()))
	{
	menu_insert("Main::" . $this->MenuList, $this->MenuOrder, $this->name, $this->name);
	}
	}

	/**
	* @return Response
	*/
	public function getResponse()
	{
	$request = Request::createFromGlobals();
	$request->setSession($this->session);

	$this->checkPrerequisites();

	$startTime = microtime(true);
	$response = $this->handle($request);
	$response->prepare($request);
	$this->logger->debug(sprintf("handle request in %.3fs", microtime(true) - $startTime));
	return $response;
	}

	/**
	* @param $name
	* @return object
	*/
	public function getObject($name)
	{
	return $this->container->get($name);
	}

	public function preInstall()
	{
	$this->RegisterMenus();
	}

	public function postInstall()
	{
	}

	public function unInstall()
	{
	}

	public function execute()
	{
	$startTime = microtime(true);

	$response = $this->getResponse();

	$this->logger->debug(sprintf("prepare response in %.3fs", microtime(true) - $startTime));

	$response->send();
	}

	/**
	* @param Request $request
	* @return Response
	*/
	protected abstract function handle(Request $request);

	/**
	* @param string $templateName
	* @param array $vars
	* @param string[] $headers
	* @return Response
	*/
	protected function render($templateName, $vars = null, $headers = null)
	{
	if ($this->requiresLogin && !$this->isLoggedIn())
	{
	new Response("permission denied", Response::HTTP_FORBIDDEN, array("contentType" => "text/plain"));
	}

	$startTime = microtime(true);

	$content = $this->renderer->loadTemplate($templateName)
	->render($vars ?: $this->getDefaultVars());

	$this->logger->debug(sprintf("%s: render response in %.3fs", get_class($this), microtime(true) - $startTime));
	return new Response(
	$content,
	Response::HTTP_OK,
	$headers ?: $this->getDefaultHeaders()
	);
	}

	public function isLoggedIn()
	{
	return (!empty($_SESSION[Auth::USER_NAME]) && $_SESSION[Auth::USER_NAME] != 'Default User');
	}

	private function checkPrerequisites()
	{
	if ($this->requiresLogin && !$this->isLoggedIn())
	{
	throw new \Exception("not allowed without login");
	}

	foreach ($this->dependencies as $dependency)
	{
	$id = plugin_find_id($dependency);
	if ($id < 0)
	{
	$this->unInstall();
	throw new \Exception("unsatisfied dependency '$dependency' in module '" . $this->getName() . "'");
	}
	}
	}

	/**
	* @return array
	*/
	protected function getDefaultHeaders()
	{
	return array(
	'Content-type' => 'text/html',
	'Pragma' => 'no-cache',
	'Cache-Control' => 'no-cache, must-revalidate, maxage=1, post-check=0, pre-check=0',
	'Expires' => 'Expires: Thu, 19 Nov 1981 08:52:00 GMT');
	}

	/**
	* @return array
	*/
	protected function getDefaultVars()
	{
	$vars = array();

	$metadata = "<meta name='description' content='The study of Open Source'>\n";
	$metadata .= "<meta http-equiv='Content-Type' content='text/html;charset=UTF-8'>\n";

	$vars['metadata'] = $metadata;

	if (!empty($this->title))
	{
	$vars[self::TITLE] = htmlentities($this->title);
	}

	$styles = "<link rel='stylesheet' href='css/fossology.css'>\n";
	$styles .= "<link rel='stylesheet' href='css/jquery-ui.css'>\n";
	$styles .= "<link rel='stylesheet' href='css/jquery.dataTables.css'>\n";
	$styles .= "<link rel='icon' type='image/x-icon' href='favicon.ico'>\n";
	$styles .= "<link rel='shortcut icon' type='image/x-icon' href='favicon.ico'>\n";

	$styles .= $this->menu->OutputCSS();

	$vars['styles'] = $styles;

	$vars['menu'] = $this->menu->Output($this->title);

	global $SysConf;
	if (array_key_exists('BUILD', $SysConf)) {
	$vars['versionInfo'] = array(
	'version' => $SysConf['BUILD']['VERSION'],
	'buildDate' => $SysConf['BUILD']['BUILD_DATE'],
	'commitHash' => $SysConf['BUILD']['COMMIT'],
	'commitDate' => $SysConf['BUILD']['COMMIT_DATE']
	);
	}

	return $vars;
	}

	protected function mergeWithDefault($vars)
	{
	return array_merge($this->getDefaultVars(), $vars);
	}

	protected function flushContent($content)
	{
	return $this->render("include/base.html.twig",$this->mergeWithDefault(array("content"=>$content)));
	}

	/**
	* @param string $name
	* @throws \Exception
	* @return string\|null
	*/
	public function __get($name)
	{
	if (method_exists($this, ($method = 'get' . ucwords($name))))
	{
	return $this->$method();
	} else
	{
	throw new \Exception("property '$name' not found in module " . $this->name);
	}
	}

	function __toString()
	{
	return getStringRepresentation(get_object_vars($this), get_class($this));
	}


	}

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