* Fill in blank option added (2008)
* Cleaning exercises (2010),
* Adding hotspot delineation support (2011)
* Adding reminder + ajax support (2011)
* Modified by hubert.borderiou (2011-10-21 question category)
*/
$current_course_tool = TOOL_QUIZ;
$this_section = SECTION_COURSES;
$debug = false;
// Notice for unauthorized people.
api_protect_course_script(true);
$origin = isset($_REQUEST['origin']) ? Security::remove_XSS($_REQUEST['origin']) : '';
$is_allowedToEdit = api_is_allowed_to_edit(null,true);
$glossaryExtraTools = api_get_setting('glossary.show_glossary_in_extra_tools');
$showGlossary = in_array($glossaryExtraTools, array('true', 'exercise', 'exercise_and_lp'));
if ($origin == 'learnpath') {
$showGlossary = in_array($glossaryExtraTools, array('true', 'lp', 'exercise_and_lp'));
}
if ($showGlossary) {
$htmlHeadXtra[] = '';
$htmlHeadXtra[] = '';
}
$htmlHeadXtra[] = api_get_js('components/jsplumb/dist/js/jsPlumb-2.0.4.js');
$htmlHeadXtra[] = api_get_js('components/jquery.ui.touch/jquery.ui.touch.js');
$htmlHeadXtra[] = api_get_js('components/xcolor/jquery.xcolor.js');
//This library is necessary for the time control feature
//tmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/epiclock/stylesheet/jquery.epiclock.css');
$htmlHeadXtra[] = api_get_css(
'js/epiclock/renderers/minute/epiclock.minute.css'
);
$htmlHeadXtra[] = api_get_js('js/epiclock/javascript/jquery.dateformat.min.js');
$htmlHeadXtra[] = api_get_js('js/epiclock/javascript/jquery.epiclock.min.js');
$htmlHeadXtra[] = api_get_js('js/epiclock/renderers/minute/epiclock.minute.js');
$template = \Chamilo\CoreBundle\Framework\Container::getTwig();
// General parameters passed via POST/GET
$learnpath_id = isset($_REQUEST['learnpath_id']) ? intval($_REQUEST['learnpath_id']) : 0;
$learnpath_item_id = isset($_REQUEST['learnpath_item_id']) ? intval($_REQUEST['learnpath_item_id']) : 0;
$learnpath_item_view_id = isset($_REQUEST['learnpath_item_view_id']) ? intval($_REQUEST['learnpath_item_view_id']) : 0;
$reminder = isset($_REQUEST['reminder']) ? intval($_REQUEST['reminder']) : 0;
$remind_question_id = isset($_REQUEST['remind_question_id']) ? intval($_REQUEST['remind_question_id']) : 0;
$exerciseId = isset($_REQUEST['exerciseId']) ? intval($_REQUEST['exerciseId']) : 0;
$formSent = isset($_REQUEST['formSent']) ? $_REQUEST['formSent'] : null;
$exerciseResult = isset($_REQUEST['exerciseResult']) ? $_REQUEST['exerciseResult'] : null;
$exerciseResultCoordinates = isset($_REQUEST['exerciseResultCoordinates']) ? $_REQUEST['exerciseResultCoordinates'] : null;
$choice = isset($_REQUEST['choice']) ? $_REQUEST['choice'] : null;
$choice = empty($choice) ? isset($_REQUEST['choice2']) ? $_REQUEST['choice2'] : null : null;
//From submit modal
$current_question = isset($_REQUEST['num']) ? intval($_REQUEST['num']) : null;
$currentAnswer = isset($_REQUEST['num_answer']) ? intval($_REQUEST['num_answer']) : null;
$endExercise = isset($_REQUEST['end_exercise']) && $_REQUEST['end_exercise'] == 1 ? true : false;
//Error message
$error = '';
//Table calls
$exercise_attempt_table = Database :: get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
/* Teacher takes an exam and want to see a preview,
we delete the objExercise from the session in order to get the latest
changes in the exercise */
if (api_is_allowed_to_edit(null, true) && isset($_GET['preview']) && $_GET['preview'] == 1 ) {
Session::erase('objExercise');
}
// 1. Loading the $objExercise variable
$exerciseFromSession = Session::read('objExercise');
if (!isset($exerciseFromSession) ||
$exerciseFromSession->id != $_REQUEST['exerciseId']
) {
// Construction of Exercise
$objExercise = new Exercise();
Session::write('firstTime', true);
if ($debug) {error_log('1. Setting the $objExercise variable'); };
Session::erase('questionList');
// if the specified exercise doesn't exist or is disabled
if (!$objExercise->read($exerciseId) ||
(!$objExercise->selectStatus() && !$is_allowedToEdit && $origin != 'learnpath')
) {
if ($debug) {error_log('1.1. Error while reading the exercise'); };
unset ($objExercise);
$error = get_lang('ExerciseNotFound');
} else {
// Saves the object into the session
Session::write('objExercise', $objExercise);
if ($debug) {error_log('1.1. $exerciseInSession was unset - set now - end'); };
}
} else {
Session::write('firstTime', false);
}
//2. Checking if $objExercise is set
$exerciseFromSession = Session::read('objExercise');
if (!isset($objExercise) && !empty($exerciseFromSession)) {
if ($debug) { error_log('2. Loading $objExercise from session'); };
$objExercise = Session::read('objExercise');
}
//3. $objExercise is not set, then return to the exercise list
if (!is_object($objExercise)) {
if ($debug) {error_log('3. $objExercise was not set, kill the script'); };
header('Location: exercise.php');
exit;
}
// If reminder ends we jump to the exercise_reminder
if ($objExercise->review_answers) {
if ($remind_question_id == -1) {
header('Location: exercise_reminder.php?origin='.$origin.'&exerciseId='.$exerciseId.'&'.api_get_cidreq());
exit;
}
}
$template->addGlobal('shuffle_answers', $objExercise->random_answers);
$htmlHeadXtra[] = $template->render(
'@template_style/exercise/submit.html.twig'
);
$current_timestamp = time();
$my_remind_list = array();
$time_control = false;
if ($objExercise->expired_time != 0) {
$time_control = true;
}
// Generating the time control key for the user
$current_expired_time_key = ExerciseLib::get_time_control_key($objExercise->id, $learnpath_id, $learnpath_item_id);
//$_SESSION['duration_time'][$current_expired_time_key] = $current_timestamp;
Session::write(
'duration_time',
[$current_expired_time_key => $current_timestamp]
);
if ($time_control) {
// Get the expired time of the current exercise in track_e_exercises
$total_seconds = $objExercise->expired_time*60;
}
$show_clock = true;
$user_id = api_get_user_id();
if ($objExercise->selectAttempts() > 0) {
$attempt_html = '';
$attempt_count = Event::get_attempt_count(
$user_id,
$exerciseId,
$learnpath_id,
$learnpath_item_id,
$learnpath_item_view_id
);
if ($attempt_count >= $objExercise->selectAttempts()) {
$show_clock = false;
if (!api_is_allowed_to_edit(null,true)) {
if ($objExercise->results_disabled == 0 && $origin != 'learnpath') {
// Showing latest attempt according with task BT#1628
$exercise_stat_info = Event::getExerciseResultsByUser(
$user_id,
$exerciseId,
api_get_course_id(),
api_get_session_id()
);
if (!empty($exercise_stat_info)) {
$max_exe_id = max(array_keys($exercise_stat_info));
$last_attempt_info = $exercise_stat_info[$max_exe_id];
$attempt_html .= Display::div(
get_lang('Date').': '.api_get_local_time($last_attempt_info['exe_date']),
array('id' => '')
);
$attempt_html .= Display::return_message(
sprintf(
get_lang('ReachedMaxAttempts'),
$exercise_title,
$objExercise->selectAttempts()
),
'warning',
false
);
if (!empty($last_attempt_info['question_list'])) {
foreach($last_attempt_info['question_list'] as $question_data) {
$question_id = $question_data['question_id'];
$marks = $question_data['marks'];
$question_info = Question::read($question_id);
$attempt_html .= Display::div($question_info->question, array('class'=>'question_title'));
$attempt_html .= Display::div(get_lang('Score').' '.$marks, array('id'=>'question_question_titlescore'));
}
}
$score = ExerciseLib::show_score($last_attempt_info['exe_result'], $last_attempt_info['exe_weighting']);
$attempt_html .= Display::div(get_lang('YourTotalScore').' '.$score, array('id'=>'question_score'));
} else {
$attempt_html .= Display::return_message(sprintf(get_lang('ReachedMaxAttempts'), $exercise_title, $objExercise->selectAttempts()), 'warning', false);
}
} else {
$attempt_html .= Display::return_message(sprintf(get_lang('ReachedMaxAttempts'), $exercise_title, $objExercise->selectAttempts()), 'warning', false);
}
} else {
$attempt_html .= Display :: return_message(sprintf(get_lang('ReachedMaxAttempts'), $exercise_title, $objExercise->selectAttempts()), 'warning', false);
}
if ($origin == 'learnpath') {
Display :: display_reduced_header();
} else {
Display :: display_header(get_lang('Exercises'));
}
echo $attempt_html;
if ($origin != 'learnpath') {
Display:: display_footer();
}
exit;
}
}
if ($debug) {
error_log("4. Setting the exe_id: $exe_id");
}
/* 5. Getting user exercise info (if the user took the exam before)
generating exe_id */
$exercise_stat_info = $objExercise->get_stat_track_exercise_info(
$learnpath_id,
$learnpath_item_id,
$learnpath_item_view_id
);
// Fix in order to get the correct question list.
$questionListUncompressed = $objExercise->getQuestionListWithMediasUncompressed();
Session::write('question_list_uncompressed', $questionListUncompressed);
$clock_expired_time = null;
if (empty($exercise_stat_info)) {
if ($debug) error_log('5 $exercise_stat_info is empty ');
$total_weight = 0;
$questionList = $objExercise->get_validated_question_list();
foreach ($questionListUncompressed as $question_id) {
$objQuestionTmp = Question::read($question_id);
$total_weight += floatval($objQuestionTmp->weighting);
}
if ($time_control) {
$expected_time = $current_timestamp + $total_seconds;
if ($debug) error_log('5.1. $current_timestamp '.$current_timestamp);
if ($debug) error_log('5.2. $expected_time '.$expected_time);
$clock_expired_time = api_get_utc_datetime($expected_time);
if ($debug) error_log('5.3. $expected_time '.$clock_expired_time);
//Sessions that contain the expired time
//$_SESSION['expired_time'][$current_expired_time_key] = $clock_expired_time;
Session::write(
'expired_time',
[$current_expired_time_key => $clock_expired_time]
);
//if ($debug) { error_log('5.4. Setting the $_SESSION[expired_time]: '.$_SESSION['expired_time'][$current_expired_time_key] ); };
}
$exe_id = $objExercise->save_stat_track_exercise_info(
$clock_expired_time,
$learnpath_id,
$learnpath_item_id,
$learnpath_item_view_id,
$questionList,
$total_weight
);
$exercise_stat_info = $objExercise->get_stat_track_exercise_info(
$learnpath_id,
$learnpath_item_id,
$learnpath_item_view_id
);
if ($debug) error_log("5.5 exercise_stat_info[] exists getting exe_id $exe_id");
} else {
$exe_id = $exercise_stat_info['exe_id'];
// Remember last question id position.
$isFirstTime = Session::read('firstTime');
if ($isFirstTime && $objExercise->type == ONE_PER_PAGE) {
$resolvedQuestions = Event::getAllExerciseEventByExeId($exe_id);
if (!empty($resolvedQuestions) &&
!empty($exercise_stat_info['data_tracking'])
) {
$last = current(end($resolvedQuestions));
$attemptQuestionList = explode(',', $exercise_stat_info['data_tracking']);
$count = 1;
foreach ($attemptQuestionList as $question) {
if ($last->getQuestionId() == $question) {
break;
}
$count++;
}
$current_question = $count;
}
}
if ($debug) error_log("5 exercise_stat_info[] exists getting exe_id $exe_id ");
}
$questionListInSession = Session::read('questionList');
if (!isset($questionListInSession)) {
// Selects the list of question ID
$questionList = $objExercise->getQuestionList();
// Media questions.
$media_is_activated = $objExercise->mediaIsActivated();
//Getting order from random
if ($media_is_activated == false &&
$objExercise->isRandom() &&
isset($exercise_stat_info) &&
!empty($exercise_stat_info['data_tracking'])
) {
$questionList = explode(',', $exercise_stat_info['data_tracking']);
}
Session::write('questionList', $questionList);
if ($debug > 0) {
error_log('$_SESSION[questionList] was set');
}
} else {
if (isset($objExercise) && isset($exerciseInSession)) {
$questionList = Session::read('questionList');
}
}
// Array to check in order to block the chat
ExerciseLib::create_chat_exercise_session($exe_id);
if ($debug) { error_log('6. $objExercise->get_stat_track_exercise_info function called:: '.print_r($exercise_stat_info, 1)); };
if (!empty($exercise_stat_info['questions_to_check'])) {
$my_remind_list = $exercise_stat_info['questions_to_check'];
$my_remind_list = explode(',', $my_remind_list);
$my_remind_list = array_filter($my_remind_list);
}
$params = "exe_id=$exe_id&exerciseId=$exerciseId&origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id&learnpath_item_view_id=$learnpath_item_view_id&".api_get_cidreq();
if ($debug) { error_log("6.1 params: -> $params"); };
if ($reminder == 2 && empty($my_remind_list)) {
if ($debug) { error_log("6.2 calling the exercise_reminder.php "); };
header('Location: exercise_reminder.php?'.$params);
exit;
}
/*
* 7. Loading Time control parameters
* If the expired time is major that zero(0) then the expired time is compute on this time.
*/
if ($time_control) {
if ($debug) error_log('7.1. Time control is enabled');
if ($debug) error_log('7.2. $current_expired_time_key '.$current_expired_time_key);
//if ($debug) error_log('7.3. $_SESSION[expired_time][$current_expired_time_key] '.$_SESSION['expired_time'][$current_expired_time_key]);
$expiredTimeFromSession = Session::read('expired_time');
if (!isset($expiredTimeFromSession[$current_expired_time_key])) {
//Timer - Get expired_time for a student
if (!empty($exercise_stat_info)) {
if ($debug) {error_log('7.4 Seems that the session ends and the user want to retake the exam'); };
$expired_time_of_this_attempt = $exercise_stat_info['expired_time_control'];
if ($debug) {error_log('7.5 $expired_time_of_this_attempt: '.$expired_time_of_this_attempt); }
// Get the last attempt of an exercise
$last_attempt_date = Event::getLastAttemptDateOfExercise($exercise_stat_info['exe_id']);
/* This means that the user enters the exam but do not answer the
first question we get the date from the track_e_exercises not from
the track_et_attempt see #2069 */
if (empty($last_attempt_date)) {
$diff = $current_timestamp - api_strtotime($exercise_stat_info['start_date'], 'UTC');
$last_attempt_date = api_get_utc_datetime(api_strtotime($exercise_stat_info['start_date'],'UTC') + $diff);
} else {
//Recalculate the time control due #2069
$diff = $current_timestamp - api_strtotime($last_attempt_date,'UTC');
$last_attempt_date = api_get_utc_datetime(api_strtotime($last_attempt_date,'UTC') + $diff);
}
if ($debug) {error_log('7.6. $last_attempt_date: '.$last_attempt_date); }
//New expired time - it is due to the possible closure of session
$new_expired_time_in_seconds = api_strtotime($expired_time_of_this_attempt, 'UTC') - api_strtotime($last_attempt_date,'UTC');
if ($debug) {error_log('7.7. $new_expired_time_in_seconds: '.$new_expired_time_in_seconds); }
$expected_time = $current_timestamp + $new_expired_time_in_seconds;
if ($debug) {error_log('7.8. $expected_time1: '.$expected_time); }
$clock_expired_time = api_get_utc_datetime($expected_time);
if ($debug) {error_log('7.9. $clock_expired_time: '.$clock_expired_time); }
// First we update the attempt to today
/* How the expired time is changed into "track_e_exercises" table,
then the last attempt for this student should be changed too */
$sql = "UPDATE $exercise_attempt_table SET
tms = '".api_get_utc_datetime()."'
WHERE
exe_id = '".$exercise_stat_info['exe_id']."' AND
tms = '".$last_attempt_date."' ";
if ($debug) {error_log('7.10. $sql: '.$sql); }
Database::query($sql);
//Sessions that contain the expired time
// $_SESSION['expired_time'][$current_expired_time_key] = $clock_expired_time;
Session::write(
'expired_time',
[$current_expired_time_key => $clock_expired_time]
);
//if ($debug) {error_log('7.11. Setting the $_SESSION[expired_time]: '.$_SESSION['expired_time'][$current_expired_time_key] ); };
}
} else {
$expiredTimeFromSession = Session::read('expired_time');
$clock_expired_time = $expiredTimeFromSession[$current_expired_time_key];
}
} else {
if ($debug) { error_log("7 No time control"); };
}
// Get time left for expiring time
$time_left = api_strtotime($clock_expired_time,'UTC') - time();
/*
* The time control feature is enable here - this feature is enable for a jquery plugin called epiclock
* for more details of how it works see this link : http://eric.garside.name/docs.html?p=epiclock
*/
if ($time_control) { //Sends the exercise form when the expired time is finished
$htmlHeadXtra[] = $objExercise->show_time_control_js($time_left);
}
// if the user has submitted the form
$exercise_title = $objExercise->selectTitle();
$exercise_sound = $objExercise->selectSound();
//in LP's is enabled the "remember question" feature?
$questionListFromSession = Session::read('questionList');
if (!isset($questionListFromSession)) {
// selects the list of question ID
$questionList = $objExercise->get_validated_question_list();
if ($objExercise->isRandom() && !empty($exercise_stat_info['data_tracking'])) {
$questionList = explode(',', $exercise_stat_info['data_tracking']);
}
Session::write('questionList', $questionList);
if ($debug > 0) { error_log('$_SESSION[questionList] was set'); }
} else {
$exerciseFromSession = Session::read('objExercise');
if (isset($objExercise) && isset($exerciseFromSession)) {
$questionList = Session::read('questionList');
}
}
if ($debug) error_log('8. Question list loaded '.print_r($questionList, 1));
//Real question count
$question_count = 0;
if (!empty($questionList)) {
$question_count = count($questionList);
}
if ($current_question > $question_count) {
$current_question = 0;
}
if ($formSent && isset($_POST)) {
if ($debug) { error_log('9. $formSent was set'); }
// Initializing
if (!is_array($exerciseResult)) {
$exerciseResult = array();
$exerciseResultCoordinates = array();
}
//Only for hotspot
if (!isset($choice) && isset($_REQUEST['hidden_hotspot_id'])) {
$hotspot_id = (int)($_REQUEST['hidden_hotspot_id']);
$choice = array($hotspot_id => '');
}
// if the user has answered at least one question
if (is_array($choice)) {
if ($debug) { error_log('9.1. $choice is an array '.print_r($choice, 1)); }
// Also store hotspot spots in the session ($exerciseResultCoordinates
// will be stored in the session at the end of this script)
if (isset($_POST['hotspot'])) {
$exerciseResultCoordinates = $_POST['hotspot'];
if ($debug) { error_log('9.2. $_POST[hotspot] data '.print_r($exerciseResultCoordinates, 1)); }
}
if ($objExercise->type == ALL_ON_ONE_PAGE) {
// $exerciseResult receives the content of the form.
// Each choice of the student is stored into the array $choice
$exerciseResult = $choice;
} else {
// gets the question ID from $choice. It is the key of the array
list ($key) = array_keys($choice);
// if the user didn't already answer this question
if (!isset($exerciseResult[$key])) {
// stores the user answer into the array
$exerciseResult[$key] = $choice[$key];
//saving each question
if ($objExercise->feedback_type != EXERCISE_FEEDBACK_TYPE_DIRECT) {
$nro_question = $current_question; // - 1;
$questionId = $key;
// gets the student choice for this question
$choice = $exerciseResult[$questionId];
if (isset($exe_id)) {
// Manage the question and answer attempts
if ($debug) {
error_log('8.3. manage_answer exe_id: '.$exe_id.' - $questionId: '.$questionId.' Choice'.print_r($choice,1));
}
$objExercise->manage_answer(
$exe_id,
$questionId,
$choice,
'exercise_show',
$exerciseResultCoordinates,
true,
false,
false,
$objExercise->propagate_neg,
array()
);
}
//END of saving and qualifying
}
}
}
if ($debug) { error_log('9.3. $choice is an array - end'); }
if ($debug) { error_log('9.4. $exerciseResult '.print_r($exerciseResult,1)); }
}
// the script "exercise_result.php" will take the variable $exerciseResult from the session
Session::write('exerciseResult', $exerciseResult);
Session::write('remind_list', $remind_list);
Session::write('exerciseResultCoordinates',$exerciseResultCoordinates);
// if all questions on one page OR if it is the last question (only for an exercise with one question per page)
if ($objExercise->type == ALL_ON_ONE_PAGE || $current_question >= $question_count) {
if (api_is_allowed_to_session_edit()) {
// goes to the script that will show the result of the exercise
if ($objExercise->type == ALL_ON_ONE_PAGE) {
if ($debug) { error_log('10. Exercise ALL_ON_ONE_PAGE -> Redirecting to exercise_result.php'); }
//We check if the user attempts before sending to the exercise_result.php
if ($objExercise->selectAttempts() > 0) {
$attempt_count = Event::get_attempt_count(
api_get_user_id(),
$exerciseId,
$learnpath_id,
$learnpath_item_id,
$learnpath_item_view_id
);
if ($attempt_count >= $objExercise->selectAttempts()) {
Display :: display_warning_message(
sprintf(get_lang('ReachedMaxAttempts'), $exercise_title, $objExercise->selectAttempts()),
false
);
if ($origin != 'learnpath') {
//so we are not in learnpath tool
echo ''; //End glossary div
Display :: display_footer();
} else {
echo '