Should block global chat when taking an exercise see #5272

main/exercice/exercise.lib.php

@@ -1921,3 +1921,15 @@ function displayGroupsForUser($in_separator, $in_userid) {
     return $res;
 }
 
+function create_chat_exercise_session($exe_id) {
+    if (!isset($_SESSION['current_exercises'])) {
+        $_SESSION['current_exercises'] = array();
+    }
+    $_SESSION['current_exercises'][$exe_id] = true;
+}
+
+function delete_chat_exercise_session($exe_id) {    
+    if (isset($_SESSION['current_exercises'])) {
+        $_SESSION['current_exercises'][$exe_id] = false;
+    }    
+}

main/exercice/exercise_result.php

@@ -224,6 +224,8 @@ if (isset($session_control_key) && !exercise_time_control_is_valid($objExercise-
 //Unset session for clock time
 exercise_time_control_delete($objExercise->id, $learnpath_id, $learnpath_item_id);
 
+delete_chat_exercise_session($exe_id);
+
 if ($origin != 'learnpath') {
     echo '<hr>';
     echo Display::url(get_lang('ReturnToCourseHomepage'), api_get_course_url(), array('class' => 'btn btn-large'));

main/exercice/exercise_submit.php

@@ -55,6 +55,7 @@ if (api_get_setting('show_glossary_in_extra_tools') == 'true') {
     $htmlHeadXtra[] = api_get_js('jquery.highlight.js'); //highlight
 }
 
+
 //This library is necessary for the time control feature
 $htmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/epiclock/stylesheet/jquery.epiclock.css');
 $htmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/epiclock/renderers/minute/epiclock.minute.css');
@@ -159,7 +160,7 @@ if ($time_control) {
 	//Get the expired time of the current exercice in track_e_exercices
 	$total_seconds 			  = $objExercise->expired_time*60;
 }
-$objExercise->questionList;
+
 $show_clock = true;
 $user_id = api_get_user_id();
 if ($objExercise->selectAttempts() > 0) {
@@ -255,6 +256,9 @@ if (empty($exercise_stat_info)) {
     if ($debug)  error_log("5  exercise_stat_info[] exists getting exe_id $exe_id ");
 }
 
+//Array to check in order to block the chat
+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'])) {

main/inc/ajax/chat.ajax.php

@@ -31,6 +31,12 @@ if (!isset($_SESSION['openChatBoxes'])) {
 	
 $chat = new Chat();
 
+if ($chat->is_chat_blocked_by_exercises()) {
+    //Desconnecting the user
+    $chat->set_user_status(0);
+    exit;
+}
+
 switch ($action) {
 	case 'chatheartbeat':
 		$chat->heartbeat();			

main/inc/lib/chat.lib.php

@@ -224,6 +224,7 @@ class Chat extends Model {
         echo "1";
         exit;
     }
+    
     /**
      * Filter chat messages to avoid XSS or other JS
      * @param string Unfiltered message
@@ -236,4 +237,15 @@ class Chat extends Model {
         $text = str_replace("\n","<br>",$text);
         return $text;
     }
+    
+    function is_chat_blocked_by_exercises() {
+        if (isset($_SESSION['current_exercises'])) {
+            foreach ($_SESSION['current_exercises'] as $attempt_status) {
+                if ($attempt_status == true) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
 }