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394 lines
14 KiB
394 lines
14 KiB
<?php
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/*
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DOKEOS - elearning and course management software
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For a full list of contributors, see documentation/credits.html
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See "documentation/licence.html" more details.
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Contact:
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Dokeos
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Rue des Palais 44 Paleizenstraat
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B-1030 Brussels - Belgium
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Tel. +32 (2) 211 34 56
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*/
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/**
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* @package dokeos.survey
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* @author unknown, the initial survey that did not make it in 1.8 because of bad code
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* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University: cleanup, refactoring and rewriting large parts of the code
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* @version $Id: survey_list.php 10680 2007-01-11 21:26:23Z pcool $
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*
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* @todo use quickforms for the forms
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* @todo check if the user already filled the survey and if this is the case then the answers have to be updated and not stored again.
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* alterantively we could not allow people from filling the survey twice.
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* @todo performance could be improved if not the survey_id was stored with the invitation but the survey_code
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*/
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// name of the language file that needs to be included
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$language_file = 'survey';
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// unsetting the course id (because it is in the URL)
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$cidReset = true;
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// including the global dokeos file
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require ('../inc/global.inc.php');
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// including additional libraries
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//require_once (api_get_path(LIBRARY_PATH)."/survey.lib.php");
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require_once('survey.lib.php');
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require_once (api_get_path(LIBRARY_PATH)."/course.lib.php");
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// getting all the course information
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$_course = CourseManager::get_course_information($_GET['course']);
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// Database table definitions
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$table_survey = Database :: get_course_table(TABLE_SURVEY, $_course['db_name']);
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$table_survey_question = Database :: get_course_table(TABLE_SURVEY_QUESTION, $_course['db_name']);
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$table_survey_question_option = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION, $_course['db_name']);
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$table_course = Database :: get_main_table(TABLE_MAIN_COURSE);
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$table_user = Database :: get_main_table(TABLE_MAIN_USER);
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$table_survey_invitation = Database :: get_course_table(TABLE_SURVEY_INVITATION, $_course['db_name']);
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// breadcrumbs
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// $interbreadcrumb[] = array ("url" => 'survey_list.php', 'name' => get_lang('SurveyList'));
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// Header
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Display :: display_header(get_lang('Survey'));
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// first we check if the needed parameters are present
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if (!isset($_GET['course']) OR !isset($_GET['invitationcode']))
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{
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Display :: display_error_message(get_lang('SurveyParametersMissingUseCopyPaste'), false);
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Display :: display_footer();
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exit;
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}
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// now we check if the invitationcode is valid
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$sql = "SELECT * FROM $table_survey_invitation WHERE invitation_code = '".Database::escape_string($_GET['invitationcode'])."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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if (mysql_num_rows($result) < 1)
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{
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Display :: display_error_message(get_lang('WrongInvitationCode'), false);
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Display :: display_footer();
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exit;
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}
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$survey_invitation = mysql_fetch_assoc($result);
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// now we check if the user already filled the survey
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if ($survey_invitation['answered'] == 1)
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{
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Display :: display_error_message(get_lang('YouAlreadyFilledThisSurvey'), false);
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Display :: display_footer();
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exit;
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}
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// checking if there is another survey with this code.
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// If this is the case there will be a language choice
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$sql = "SELECT * FROM $table_survey WHERE code='".Database::escape_string($survey_invitation['survey_code'])."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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if (mysql_num_rows($result) > 1)
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{
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if ($_POST['language'])
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{
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$survey_invitation['survey_id'] = $_POST['language'];
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}
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else
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{
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echo '<form id="language" name="language" method="POST" action="'.api_get_self().'?course='.$_GET['course'].'&invitationcode='.$_GET['invitationcode'].'">';
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echo ' <select name="language">';
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while ($row=mysql_fetch_assoc($result))
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{
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echo '<option value="'.$row['survey_id'].'">'.$row['lang'].'</option>';
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}
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echo '</select>';
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echo ' <input type="submit" name="Submit" value="'.get_lang('Ok').'" />';
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echo '</form>';
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display::display_footer();
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exit;
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}
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}
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else
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{
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$row=mysql_fetch_assoc($result);
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$survey_invitation['survey_id'] = $row['survey_id'];
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}
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// getting the survey information
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$survey_data = survey_manager::get_survey($survey_invitation['survey_id']);
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$survey_data['survey_id'] = $survey_invitation['survey_id'];
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// storing the answers
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if ($_POST)
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{
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/*
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echo '<pre>';
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print_r($_POST);
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echo '</pre>';
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*/
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// getting all the types of the question (because of the special treatment of the score question type
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$sql = "SELECT * FROM $table_survey_question WHERE survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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while ($row = mysql_fetch_assoc($result))
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{
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$types[$row['question_id']] = $row['type'];
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}
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// looping through all the post values
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foreach ($_POST as $key=>$value)
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{
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// if the post value key contains the string 'question' then it is an answer on a question
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if (strstr($key,'question'))
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{
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// finding the question id by removing 'question'
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$survey_question_id = str_replace('question', '',$key);
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// if the post value is an array then we have a multiple response question or a scoring question type
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// remark: when it is a multiple response then the value of the array is the option_id
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// when it is a scoring question then the key of the array is the option_id and the value is the value
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if (is_array($value))
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{
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remove_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id);
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foreach ($value as $answer_key => $answer_value)
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{
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if ($types[$survey_question_id] == 'score')
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{
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$option_id = $answer_key;
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$option_value = $answer_value;
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}
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else
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{
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$option_id = $answer_value;
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$option_value = '';
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}
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store_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id, $option_id, $option_value, $survey_data);
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}
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}
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// all the other question types (open question, multiple choice, percentage, ...)
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else
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{
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if ($types[$survey_question_id] == 'percentage')
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{
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$sql = "SELECT * FROM $table_survey_question_option WHERE question_option_id='".Database::escape_string($value)."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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$row = mysql_fetch_assoc($result);
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$option_value = $row['option_text'];
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}
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else
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{
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$option_value = 0;
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if($types[$survey_question_id] == 'open')
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{
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$option_value = $value;
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//$value = 0;
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}
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}
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$survey_question_answer = $value;
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remove_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id);
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store_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id, $value, $option_value, $survey_data);
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//store_answer($user,$survey_id,$question_id, $option_id, $option_value, $survey_data);
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}
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}
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}
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}
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// displaying the survey title and subtitle (appears on every page)
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echo '<div id="survey_title">'.$survey_data['survey_title'].'</div>';
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echo '<div id="survey_subtitle">'.$survey_data['survey_subtitle'].'</div>';
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// displaying the survey introduction
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if (!isset($_GET['show']))
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{
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echo '<div id="survey_content" class="survey_content">'.$survey_data['survey_introduction'].'</div>';
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$limit = 0;
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}
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// displaying the survey thanks message
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if ($_POST['finish_survey'])
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{
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echo '<div id="survey_content" class="survey_content"><strong>'.get_lang('SurveyFinished').'</strong> <br />'.$survey_data['survey_thanks'].'</div>';
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survey_manager::update_survey_answered($survey_data['survey_id'], $survey_invitation['user'], $survey_invitation['survey_code']);
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Display :: display_footer();
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exit;
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}
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if (isset($_GET['show']))
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{
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// Getting all the questions for this page and add them to a multidimensional array where the first index is the page.
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// as long as there is no pagebreak fount we keep adding questions to the page
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$questions_displayed = array();
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$counter = 0;
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$sql = "SELECT * FROM $table_survey_question
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WHERE survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'
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ORDER BY sort ASC";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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while ($row = mysql_fetch_assoc($result))
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{
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if($row['type'] == 'pagebreak')
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{
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$counter++;
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}
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else
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{
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$paged_questions[$counter][] = $row['question_id'];
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}
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}
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if (key_exists($_GET['show'],$paged_questions))
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{
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$sql = "SELECT survey_question.question_id, survey_question.survey_id, survey_question.survey_question, survey_question.display, survey_question.sort, survey_question.type, survey_question.max_value,
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survey_question_option.question_option_id, survey_question_option.option_text, survey_question_option.sort as option_sort
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FROM $table_survey_question survey_question
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LEFT JOIN $table_survey_question_option survey_question_option
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ON survey_question.question_id = survey_question_option.question_id
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WHERE survey_question.survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'
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AND survey_question.question_id IN (".implode(',',$paged_questions[$_GET['show']]).")
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ORDER BY survey_question.sort, survey_question_option.sort ASC";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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$question_counter_max = mysql_num_rows($result);
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$counter = 0;
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$limit=0;
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$questions = array();
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while ($row = mysql_fetch_assoc($result))
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{
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// if the type is not a pagebreak we store it in the $questions array
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if($row['type'] <> 'pagebreak')
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{
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$questions[$row['sort']]['question_id'] = $row['question_id'];
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$questions[$row['sort']]['survey_id'] = $row['survey_id'];
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$questions[$row['sort']]['survey_question'] = $row['survey_question'];
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$questions[$row['sort']]['display'] = $row['display'];
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$questions[$row['sort']]['type'] = $row['type'];
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$questions[$row['sort']]['options'][$row['question_option_id']] = $row['option_text'];
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$questions[$row['sort']]['maximum_score'] = $row['max_value'];
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}
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// if the type is a pagebreak we are finished loading the questions for this page
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else
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{
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break;
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}
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$counter++;
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}
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}
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}
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// selecting the maximum number of pages
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$sql = "SELECT * FROM $table_survey_question WHERE type='".Database::escape_string('pagebreak')."' AND survey_id='".Database::escape_string($survey_invitation['survey_id'])."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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$numberofpages = mysql_num_rows($result) + 1;
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// Displaying the form with the questions
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if (isset($_GET['show']))
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{
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$show = (int)$_GET['show'] + 1;
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}
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else
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{
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$show = 0;
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}
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// Displaying the form with the questions
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echo '<form id="question" name="question" method="post" action="'.api_get_self().'?course='.$_GET['course'].'&invitationcode='.$_GET['invitationcode'].'&show='.$show.'">';
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echo '<input type="hidden" name="language" value="'.$_POST['language'].'" />';
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if(is_array($questions)){
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foreach ($questions as $key=>$question)
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{
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$display = new $question['type'];
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$display->render_question($question);
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}
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}
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if (($show < $numberofpages) OR !$_GET['show'])
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{
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//echo '<a href="'.api_get_self().'?survey_id='.$survey_invitation['survey_id'].'&show='.$limit.'">NEXT</a>';
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echo '<input type="submit" name="next_survey_page" value="'.get_lang('Next').' >> " />';
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}
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if ($show >= $numberofpages AND $_GET['show'])
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{
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echo '<input type="submit" name="finish_survey" value="'.get_lang('FinishSurvey').' >> " />';
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}
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echo '</form>';
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// Footer
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Display :: display_footer();
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/**
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* This function stores an answer of a user on a question of a survey
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*
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* @param mixed $user the user id or email of the person who fills the survey
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* @param integer $survey_id the survey id
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* @param integer $question_id the question id
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* @param integer $option_id the option id
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*
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* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
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* @version January 2007
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*/
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function store_answer($user, $survey_id, $question_id, $option_id, $option_value, $survey_data)
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{
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global $_course;
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global $types;
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// table definition
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$table_survey_answer = Database :: get_course_table(TABLE_SURVEY_ANSWER, $_course['db_name']);
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// make the survey anonymous
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if ($survey_data['anonymous'] == 1)
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{
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if (!$_SESSION['surveyuser'])
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{
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$user = md5($user.time());
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$_SESSION['surveyuser'] = $user;
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}
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else
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{
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$user = $_SESSION['surveyuser'];
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}
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}
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$sql = "INSERT INTO $table_survey_answer (user, survey_id, question_id, option_id, value) VALUES (
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'".Database::escape_string($user)."',
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'".Database::escape_string($survey_id)."',
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'".Database::escape_string($question_id)."',
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'".Database::escape_string($option_id)."',
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'".Database::escape_string($option_value)."'
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)";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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}
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/**
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* This function removes an (or multiple) answer(s) of a user on a question of a survey
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*
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* @param mixed $user the user id or email of the person who fills the survey
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* @param integer $survey_id the survey id
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* @param integer $question_id the question id
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* @param integer $option_id the option id
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*
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* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
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* @version January 2007
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*/
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function remove_answer($user, $survey_id, $question_id)
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{
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global $_course;
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// table definition
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$table_survey_answer = Database :: get_course_table(TABLE_SURVEY_ANSWER, $_course['db_name']);
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$sql = "DELETE FROM $table_survey_answer
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WHERE user = '".Database::escape_string($user)."'
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AND survey_id = '".Database::escape_string($survey_id)."'
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AND question_id = '".Database::escape_string($question_id)."'";
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$result = api_sql_query($sql, __FILE__, __LINE__);
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}
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?>
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