Questions-and-Answers/site/controller.php

<?php
/*--------------------------------------------------------------------------------------------------------|  www.vdm.io  |------/
    __      __       _     _____                 _                                  _     __  __      _   _               _
    \ \    / /      | |   |  __ \               | |                                | |   |  \/  |    | | | |             | |
     \ \  / /_ _ ___| |_  | |  | | _____   _____| | ___  _ __  _ __ ___   ___ _ __ | |_  | \  / | ___| |_| |__   ___   __| |
      \ \/ / _` / __| __| | |  | |/ _ \ \ / / _ \ |/ _ \| '_ \| '_ ` _ \ / _ \ '_ \| __| | |\/| |/ _ \ __| '_ \ / _ \ / _` |
       \  / (_| \__ \ |_  | |__| |  __/\ V /  __/ | (_) | |_) | | | | | |  __/ | | | |_  | |  | |  __/ |_| | | | (_) | (_| |
        \/ \__,_|___/\__| |_____/ \___| \_/ \___|_|\___/| .__/|_| |_| |_|\___|_| |_|\__| |_|  |_|\___|\__|_| |_|\___/ \__,_|
                                                        | |
                                                        |_|
/-------------------------------------------------------------------------------------------------------------------------------/

	@version		1.0.x
	@build			30th May, 2020
	@created		30th January, 2017
	@package		Questions and Answers
	@subpackage		controller.php
	@author			Llewellyn van der Merwe <https://www.vdm.io/>
	@copyright		Copyright (C) 2015. All Rights Reserved
	@license		GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html

	Questions &amp; Answers

/-----------------------------------------------------------------------------------------------------------------------------*/

// No direct access to this file
defined('_JEXEC') or die('Restricted access');

use Joomla\Utilities\ArrayHelper;

/**
 * Questionsanswers Component Controller
 */
class QuestionsanswersController extends JControllerLegacy
{
	/**
	 * Method to display a view.
	 *
	 * @param   boolean  $cachable   If true, the view output will be cached.
	 * @param   boolean  $urlparams  An array of safe URL parameters and their variable types, for valid values see {@link JFilterInput::clean()}.
	 *
	 * @return  JController  This object to support chaining.
	 *
	 */
	function display($cachable = false, $urlparams = false)
	{
		// set default view if not set
		$view		= $this->input->getCmd('view', 'questions_and_answers');
		$this->input->set('view', $view);
		$isEdit		= $this->checkEditView($view);
		$layout		= $this->input->get('layout', null, 'WORD');
		$id			= $this->input->getInt('id');
		// $cachable	= true; (TODO) working on a fix [gh-238](https://github.com/vdm-io/Joomla-Component-Builder/issues/238)
		
		// insure that the view is not cashable if edit view or if user is logged in
		$user = JFactory::getUser();
		if ($user->get('id') || $isEdit)
		{
			$cachable = false;
		}
		
		// Check for edit form.
		if($isEdit)
		{
			if ($layout == 'edit' && !$this->checkEditId('com_questionsanswers.edit.'.$view, $id))
			{
				// Somehow the person just went to the form - we don't allow that.
				$this->setError(JText::sprintf('JLIB_APPLICATION_ERROR_UNHELD_ID', $id));
				$this->setMessage($this->getError(), 'error');
				// check if item was opend from other then its own list view
				$ref 	= $this->input->getCmd('ref', 0);
				$refid 	= $this->input->getInt('refid', 0);
				// set redirect
				if ($refid > 0 && QuestionsanswersHelper::checkString($ref))
				{
					// redirect to item of ref
					$this->setRedirect(JRoute::_('index.php?option=com_questionsanswers&view='.(string)$ref.'&layout=edit&id='.(int)$refid, false));
				}
				elseif (QuestionsanswersHelper::checkString($ref))
				{
					// redirect to ref
					 $this->setRedirect(JRoute::_('index.php?option=com_questionsanswers&view='.(string)$ref, false));
				}
				else
				{
					// normal redirect back to the list default site view
					$this->setRedirect(JRoute::_('index.php?option=com_questionsanswers&view=questions_and_answers', false));
				}
				return false;
			}
		}
		
		// we may need to make this more dynamic in the future. (TODO)
		$safeurlparams = array(
			'catid' => 'INT',
			'id' => 'INT',
			'cid' => 'ARRAY',
			'year' => 'INT',
			'month' => 'INT',
			'limit' => 'UINT',
			'limitstart' => 'UINT',
			'showall' => 'INT',
			'return' => 'BASE64',
			'filter' => 'STRING',
			'filter_order' => 'CMD',
			'filter_order_Dir' => 'CMD',
			'filter-search' => 'STRING',
			'print' => 'BOOLEAN',
			'lang' => 'CMD',
			'Itemid' => 'INT');

		// should these not merge?
		if (QuestionsanswersHelper::checkArray($urlparams))
		{
			$safeurlparams = QuestionsanswersHelper::mergeArrays(array($urlparams, $safeurlparams));
		}

		return parent::display($cachable, $safeurlparams);
	}

	protected function checkEditView($view)
	{
		if (QuestionsanswersHelper::checkString($view))
		{
			$views = array(
				'question_and_answer'
				);
			// check if this is a edit view
			if (in_array($view,$views))
			{
				return true;
			}
		}
		return false;
	}
}