<?php
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2008 Dokeos SPRL

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	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.

	See the GNU General Public License for more details.

	Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
	Mail: info@dokeos.com
==============================================================================
*/
/**
*	@package dokeos.survey
* 	@author unknown, the initial survey that did not make it in 1.8 because of bad code
* 	@author Patrick Cool <patrick.cool@UGent.be>, Ghent University: cleanup, refactoring and rewriting large parts of the code
* 	@version $Id: question.php 19004 2009-03-12 18:04:08Z juliomontoya $
*/

// name of the language file that needs to be included
$language_file = 'survey';

// including the global dokeos file
require ('../inc/global.inc.php');

// including additional libraries
//require_once (api_get_path(LIBRARY_PATH)."/survey.lib.php");
require_once('survey.lib.php');

/** @todo this has to be moved to a more appropriate place (after the display_header of the code)*/
if (!api_is_allowed_to_edit(false,true)) {
	Display :: display_header();
	Display :: display_error_message(get_lang('NotAllowed'), false);
	Display :: display_footer();
	exit;
}

// Database table definitions
$table_survey 					= Database :: get_course_table(TABLE_SURVEY);
$table_survey_question 			= Database :: get_course_table(TABLE_SURVEY_QUESTION);
$table_survey_question_option 	= Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION);
$table_course 					= Database :: get_main_table(TABLE_MAIN_COURSE);
$table_user 					= Database :: get_main_table(TABLE_MAIN_USER);

// getting the survey information
$survey_data = survey_manager::get_survey($_GET['survey_id']);
if (empty($survey_data)) {
	Display :: display_header(get_lang('Survey'));
	Display :: display_error_message(get_lang('InvallidSurvey'), false);
	Display :: display_footer();
	exit;
}


$urlname = substr(html_entity_decode($survey_data['title'],ENT_QUOTES,$charset), 0, 40);
if (strlen(strip_tags($survey_data['title'])) > 40) {
	$urlname .= '...';
}

if($survey_data['survey_type']==1) {
	$sql = 'SELECT id FROM '.Database :: get_course_table(TABLE_SURVEY_QUESTION_GROUP).' WHERE survey_id = '.(int)$_GET['survey_id'].' LIMIT 1';
	$rs = api_sql_query($sql,__FILE__,__LINE__);
	if(Database::num_rows($rs)===0) {
		header('Location: survey.php?survey_id='.(int)$_GET['survey_id'].'&message='.'YouNeedToCreateGroups');
		exit;	
	}
}

// breadcrumbs
$interbreadcrumb[] = array ("url" => 'survey_list.php', 'name' => get_lang('SurveyList'));
$interbreadcrumb[] = array ("url" => 'survey.php?survey_id='.Security::remove_XSS($_GET['survey_id']), 'name' => strip_tags($urlname));

// Tool name
if ($_GET['action'] == 'add') {
	$tool_name = get_lang('AddQuestion');
}
if ($_GET['action'] == 'edit') {
	$tool_name = get_lang('EditQuestion');
}

// the possible question types
$possible_types = array('personality','yesno', 'multiplechoice', 'multipleresponse', 'open', 'dropdown', 'comment', 'pagebreak', 'percentage', 'score');

// checking if it is a valid type
if (!in_array($_GET['type'], $possible_types))
{
	Display :: display_header($tool_name,'Survey');
	Display :: display_error_message(get_lang('TypeDoesNotExist'), false);
	Display :: display_footer();
}

// displaying the form for adding or editing the question
if (empty($_POST['save_question']) && in_array($_GET['type'],$possible_types)) {
	if (!isset($_POST['save_question'])) {
		// Displaying the header
		Display::display_header($tool_name,'Survey');	
		$error_message='';	
		// Displys message if exists					
		if (isset($_SESSION['temp_sys_message'])) {	
			$error_message=$_SESSION['temp_sys_message'];
			unset($_SESSION['temp_sys_message']);				
			if ($error_message=='PleaseEnterAQuestion' || $error_message=='PleasFillAllAnswer'|| $error_message=='PleaseChooseACondition'|| $error_message=='ChooseDifferentCategories') {
				Display::display_error_message(get_lang($error_message), true);			
			} 		
		}
		  
		echo '<img src="../img/'.survey_manager::icon_question($_GET['type']).'" alt="'.get_lang(ucfirst($_GET['type'])).'" title="'.get_lang(ucfirst($_GET['type'])).'" /><br />';
		echo get_lang(ucfirst($_GET['type']));
	}
	$form = new $_GET['type'];

	// The defaults values for the form
	$form_content['horizontalvertical'] = 'vertical2';
	$form_content['answers'] = array('', '');
	
	if ($_GET['type'] == 'yesno') {
		$form_content['answers'][0]=get_lang('Yes');
		$form_content['answers'][1]=get_lang('No');
	}
	
	if ($_GET['type'] == 'personality') {
		$form_content['answers'][0]=get_lang('1');
		$form_content['answers'][1]=get_lang('2');
		$form_content['answers'][2]=get_lang('3');
		$form_content['answers'][3]=get_lang('4');
		$form_content['answers'][4]=get_lang('5');
		
		$form_content['values'][0]=0;
		$form_content['values'][1]=0;
		$form_content['values'][2]=1;
		$form_content['values'][3]=2;
		$form_content['values'][4]=3;	
	}
		
	// We are editing a question
	if (isset($_GET['question_id']) AND !empty($_GET['question_id'])) {
		$form_content = survey_manager::get_question($_GET['question_id']);		
	}

	// an action has been performed (for instance adding a possible answer, moving an answer, ...)
	if ($_POST) {	
		$form_content = $_POST;
		$form_content = $form->handle_action($form_content);
	}
	
	if ($error_message!='') {						
		$form_content['question']=$_SESSION['temp_user_message'];
		$form_content['answers']=$_SESSION['temp_answers'];
		$form_content['values']=$_SESSION['temp_values'];
		
		unset($_SESSION['temp_user_message']);
		unset($_SESSION['temp_answers']);
		unset($_SESSION['temp_values']);								
	}
	
	$form->create_form($form_content);
	$form->render_form();	 
} else {	
	$form_content = $_POST;	
	$form = new question();
	$form->handle_action($form_content);
}

// Footer
Display :: display_footer();
?>