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- <?php
- /*
- DOKEOS - elearning and course management software
- For a full list of contributors, see documentation/credits.html
- 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 "documentation/licence.html" more details.
- Contact:
- Dokeos
- Rue des Palais 44 Paleizenstraat
- B-1030 Brussels - Belgium
- Tel. +32 (2) 211 34 56
- */
- /**
- * @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: survey_list.php 10680 2007-01-11 21:26:23Z pcool $
- *
- * @todo use quickforms for the forms
- * @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.
- * alterantively we could not allow people from filling the survey twice.
- * @todo performance could be improved if not the survey_id was stored with the invitation but the survey_code
- */
- // name of the language file that needs to be included
- $language_file = 'survey';
- // unsetting the course id (because it is in the URL)
- if (!isset($_GET['cidReq']))
- {
- $cidReset = true;
- }
- else
- {
- $_cid = $_GET['cidReq'];
- }
- // 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');
- require_once (api_get_path(LIBRARY_PATH).'course.lib.php');
- // getting all the course information
- $_course = CourseManager::get_course_information($_GET['course']);
- // Database table definitions
- $table_survey = Database :: get_course_table(TABLE_SURVEY, $_course['db_name']);
- $table_survey_question = Database :: get_course_table(TABLE_SURVEY_QUESTION, $_course['db_name']);
- $table_survey_question_option = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION, $_course['db_name']);
- $table_course = Database :: get_main_table(TABLE_MAIN_COURSE);
- $table_user = Database :: get_main_table(TABLE_MAIN_USER);
- $table_survey_invitation = Database :: get_course_table(TABLE_SURVEY_INVITATION, $_course['db_name']);
- // breadcrumbs
- if (!empty($_user))
- {
- $interbreadcrumb[] = array ("url" => 'survey_list.php', 'name' => get_lang('SurveyList'));
- }
- // Header
- Display :: display_header(get_lang('Survey'));
- // first we check if the needed parameters are present
- if (!isset($_GET['course']) OR !isset($_GET['invitationcode']))
- {
- Display :: display_error_message(get_lang('SurveyParametersMissingUseCopyPaste'), false);
- Display :: display_footer();
- exit;
- }
- // now we check if the invitationcode is valid
- $sql = "SELECT * FROM $table_survey_invitation WHERE invitation_code = '".Database::escape_string($_GET['invitationcode'])."'";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- if (mysql_num_rows($result) < 1)
- {
- Display :: display_error_message(get_lang('WrongInvitationCode'), false);
- Display :: display_footer();
- exit;
- }
- $survey_invitation = mysql_fetch_assoc($result);
- // now we check if the user already filled the survey
- if ($survey_invitation['answered'] == 1)
- {
- Display :: display_error_message(get_lang('YouAlreadyFilledThisSurvey'), false);
- Display :: display_footer();
- exit;
- }
- // checking if there is another survey with this code.
- // If this is the case there will be a language choice
- $sql = "SELECT * FROM $table_survey WHERE code='".Database::escape_string($survey_invitation['survey_code'])."'";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- if (mysql_num_rows($result) > 1)
- {
- if ($_POST['language'])
- {
- $survey_invitation['survey_id'] = $_POST['language'];
- }
- else
- {
- echo '<form id="language" name="language" method="POST" action="'.api_get_self().'?course='.$_GET['course'].'&invitationcode='.$_GET['invitationcode'].'&cidReq='.$_GET['cidReq'].'">';
- echo ' <select name="language">';
- while ($row=mysql_fetch_assoc($result))
- {
- echo '<option value="'.$row['survey_id'].'">'.$row['lang'].'</option>';
- }
- echo '</select>';
- echo ' <input type="submit" name="Submit" value="'.get_lang('Ok').'" />';
- echo '</form>';
- display::display_footer();
- exit;
- }
- }
- else
- {
- $row=mysql_fetch_assoc($result);
- $survey_invitation['survey_id'] = $row['survey_id'];
- }
- // getting the survey information
- $survey_data = survey_manager::get_survey($survey_invitation['survey_id']);
- $survey_data['survey_id'] = $survey_invitation['survey_id'];
- // storing the answers
- if ($_POST)
- {
- // getting all the types of the question (because of the special treatment of the score question type
- $sql = "SELECT * FROM $table_survey_question WHERE survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- while ($row = mysql_fetch_assoc($result))
- {
- $types[$row['question_id']] = $row['type'];
- }
- // looping through all the post values
- foreach ($_POST as $key=>$value)
- {
- // if the post value key contains the string 'question' then it is an answer on a question
- if (strstr($key,'question'))
- {
- // finding the question id by removing 'question'
- $survey_question_id = str_replace('question', '',$key);
- // if the post value is an array then we have a multiple response question or a scoring question type
- // remark: when it is a multiple response then the value of the array is the option_id
- // when it is a scoring question then the key of the array is the option_id and the value is the value
- if (is_array($value))
- {
- SurveyUtil::remove_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id);
- foreach ($value as $answer_key => $answer_value)
- {
- if ($types[$survey_question_id] == 'score')
- {
- $option_id = $answer_key;
- $option_value = $answer_value;
- }
- else
- {
- $option_id = $answer_value;
- $option_value = '';
- }
- SurveyUtil::store_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id, $option_id, $option_value, $survey_data);
- }
- }
- // all the other question types (open question, multiple choice, percentage, ...)
- else
- {
- if ($types[$survey_question_id] == 'percentage')
- {
- $sql = "SELECT * FROM $table_survey_question_option WHERE question_option_id='".Database::escape_string($value)."'";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- $row = mysql_fetch_assoc($result);
- $option_value = $row['option_text'];
- }
- else
- {
- $option_value = 0;
- if($types[$survey_question_id] == 'open')
- {
- $option_value = $value;
- //$value = 0;
- }
- }
- $survey_question_answer = $value;
- SurveyUtil::remove_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id);
- SurveyUtil::store_answer($survey_invitation['user'], $survey_invitation['survey_id'], $survey_question_id, $value, $option_value, $survey_data);
- //SurveyUtil::store_answer($user,$survey_id,$question_id, $option_id, $option_value, $survey_data);
- }
- }
- }
- }
- // displaying the survey title and subtitle (appears on every page)
- echo '<div id="survey_title">'.$survey_data['survey_title'].'</div>';
- echo '<div id="survey_subtitle">'.$survey_data['survey_subtitle'].'</div>';
- // checking time availability
- $start_date = mktime(0,0,0,substr($survey_data['start_date'],5,2),substr($survey_data['start_date'],8,2),substr($survey_data['start_date'],0,4));
- $end_date = mktime(0,0,0,substr($survey_data['end_date'],5,2),substr($survey_data['end_date'],8,2),substr($survey_data['end_date'],0,4));
- $cur_date = time();
- if($cur_date < $start_date)
- {
- Display :: display_warning_message(get_lang('SurveyNotAvailableYet'), false);
- Display :: display_footer();
- exit;
- }
- if($cur_date > $end_date)
- {
- Display :: display_warning_message(get_lang('SurveyNotAvailableAnymore'), false);
- Display :: display_footer();
- exit;
- }
- // displaying the survey introduction
- if (!isset($_GET['show']))
- {
- echo '<div id="survey_content" class="survey_content">'.$survey_data['survey_introduction'].'</div>';
- $limit = 0;
- }
- // displaying the survey thanks message
- if ($_POST['finish_survey'])
- {
- echo '<div id="survey_content" class="survey_content"><strong>'.get_lang('SurveyFinished').'</strong> <br />'.$survey_data['survey_thanks'].'</div>';
- survey_manager::update_survey_answered($survey_data['survey_id'], $survey_invitation['user'], $survey_invitation['survey_code']);
- Display :: display_footer();
- exit;
- }
- if (isset($_GET['show']))
- {
- // Getting all the questions for this page and add them to a multidimensional array where the first index is the page.
- // as long as there is no pagebreak fount we keep adding questions to the page
- $questions_displayed = array();
- $counter = 0;
- $sql = "SELECT * FROM $table_survey_question
- WHERE survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'
- ORDER BY sort ASC";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- while ($row = mysql_fetch_assoc($result))
- {
- if($row['type'] == 'pagebreak')
- {
- $counter++;
- }
- else
- {
- $paged_questions[$counter][] = $row['question_id'];
- }
- }
- if (key_exists($_GET['show'],$paged_questions))
- {
- $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,
- survey_question_option.question_option_id, survey_question_option.option_text, survey_question_option.sort as option_sort
- FROM $table_survey_question survey_question
- LEFT JOIN $table_survey_question_option survey_question_option
- ON survey_question.question_id = survey_question_option.question_id
- WHERE survey_question.survey_id = '".Database::escape_string($survey_invitation['survey_id'])."'
- AND survey_question.question_id IN (".implode(',',$paged_questions[$_GET['show']]).")
- ORDER BY survey_question.sort, survey_question_option.sort ASC";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- $question_counter_max = mysql_num_rows($result);
- $counter = 0;
- $limit=0;
- $questions = array();
- while ($row = mysql_fetch_assoc($result))
- {
- // if the type is not a pagebreak we store it in the $questions array
- if($row['type'] <> 'pagebreak')
- {
- $questions[$row['sort']]['question_id'] = $row['question_id'];
- $questions[$row['sort']]['survey_id'] = $row['survey_id'];
- $questions[$row['sort']]['survey_question'] = $row['survey_question'];
- $questions[$row['sort']]['display'] = $row['display'];
- $questions[$row['sort']]['type'] = $row['type'];
- $questions[$row['sort']]['options'][$row['question_option_id']] = $row['option_text'];
- $questions[$row['sort']]['maximum_score'] = $row['max_value'];
- }
- // if the type is a pagebreak we are finished loading the questions for this page
- else
- {
- break;
- }
- $counter++;
- }
- }
- }
- // selecting the maximum number of pages
- $sql = "SELECT * FROM $table_survey_question WHERE type='".Database::escape_string('pagebreak')."' AND survey_id='".Database::escape_string($survey_invitation['survey_id'])."'";
- $result = api_sql_query($sql, __FILE__, __LINE__);
- $numberofpages = mysql_num_rows($result) + 1;
- // Displaying the form with the questions
- if (isset($_GET['show']))
- {
- $show = (int)$_GET['show'] + 1;
- }
- else
- {
- $show = 0;
- }
- // Displaying the form with the questions
- echo '<form id="question" name="question" method="post" action="'.api_get_self().'?course='.$_GET['course'].'&invitationcode='.$_GET['invitationcode'].'&show='.$show.'&cidReq='.$_GET['cidReq'].'">';
- echo '<input type="hidden" name="language" value="'.$_POST['language'].'" />';
- if(is_array($questions)){
- foreach ($questions as $key=>$question)
- {
- $display = new $question['type'];
- $display->render_question($question);
- }
- }
- if (($show < $numberofpages) OR !$_GET['show'])
- {
- //echo '<a href="'.api_get_self().'?survey_id='.$survey_invitation['survey_id'].'&show='.$limit.'">NEXT</a>';
- echo '<input type="submit" name="next_survey_page" value="'.get_lang('Next').' >> " />';
- }
- if ($show >= $numberofpages AND $_GET['show'])
- {
- echo '<input type="submit" name="finish_survey" value="'.get_lang('FinishSurvey').' >> " />';
- }
- echo '</form>';
- // Footer
- Display :: display_footer();
- ?>
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