Improve backup export/import speed see BT#14425

- Remove <input name ="course" value="base64" only for the create backup
- Only load orphan questions when are selected

main/coursecopy/create_backup.php

@@ -40,23 +40,20 @@ Display::display_header($nameTools);
 
 // Display the tool title
 echo Display::page_header($nameTools);
+$action = isset($_POST['action']) ? $_POST['action'] : '';
+$backupOption = isset($_POST['backup_option']) ? $_POST['backup_option'] : '';
 
-if (Security::check_token('post') && (
+if (Security::check_token('post') &&
-        (
+    ($action === 'course_select_form' || $backupOption === 'full_backup')
-            isset($_POST['action']) &&
-            $_POST['action'] == 'course_select_form'
-        ) || (
-            isset($_POST['backup_option']) &&
-            $_POST['backup_option'] == 'full_backup'
-        )
-    )
 ) {
     // Clear token
     Security::clear_token();
     $cb = new CourseBuilder();
-    $course = $cb->build();
+    if ($action === 'course_select_form') {
-    if (isset($_POST['action']) && $_POST['action'] == 'course_select_form') {
+        $course = $cb->build(0, null, false, array_keys($_POST['resource']), $_POST['resource']);
         $course = CourseSelectForm::get_posted_course(null, 0, '', $course);
+    } else {
+        $course = $cb->build();
     }
     $zipFile = CourseArchiver::createBackup($course);
     echo Display::return_message(get_lang('BackupCreated'), 'confirm');
@@ -66,11 +63,7 @@ if (Security::check_token('post') && (
         api_get_path(WEB_CODE_PATH).'course_info/download.php?archive='.$zipFile.'&'.api_get_cidreq(),
         ['class' => 'btn btn-primary btn-large']
     );
-} elseif (Security::check_token('post') && (
+} elseif (Security::check_token('post') && $backupOption === 'select_items') {
-        isset($_POST['backup_option']) &&
-        $_POST['backup_option'] == 'select_items'
-    )
-) {
     // Clear token
     Security::clear_token();
     $cb = new CourseBuilder('partial');
@@ -120,3 +113,4 @@ if (Security::check_token('post') && (
 }
 
 Display::display_footer();
+

src/Chamilo/CourseBundle/Component/CourseCopy/CourseBuilder.php

@@ -76,6 +76,29 @@ class CourseBuilder
         'gradebook',
     ];
 
+    public $toolToName = [
+        'announcements' => RESOURCE_ANNOUNCEMENT,
+        'attendance' => RESOURCE_ATTENDANCE,
+        'course_descriptions' => RESOURCE_COURSEDESCRIPTION,
+        'documents' => RESOURCE_DOCUMENT,
+        'events' => RESOURCE_EVENT,
+        'forum_category' => RESOURCE_FORUMCATEGORY,
+        'forums' => RESOURCE_FORUM,
+        'forum_topics' => RESOURCE_FORUMTOPIC,
+        'glossary' => RESOURCE_GLOSSARY,
+        'quizzes' => RESOURCE_QUIZ,
+        'test_category' => RESOURCE_TEST_CATEGORY,
+        'learnpath_category' => RESOURCE_LEARNPATH_CATEGORY,
+        'learnpaths' => RESOURCE_LEARNPATH,
+        'links' => RESOURCE_LINK,
+        'surveys' => RESOURCE_SURVEY,
+        'tool_intro' => RESOURCE_TOOL_INTRO,
+        'thematic' => RESOURCE_THEMATIC,
+        'wiki' => RESOURCE_WIKI,
+        'works' => RESOURCE_WORK,
+        'gradebook' => RESOURCE_GRADEBOOK,
+    ];
+
     /* With this array you can filter wich elements of the tools are going
     to be added in the course obj (only works with LPs) */
     public $specific_id_list = [];
@@ -136,20 +159,39 @@ class CourseBuilder
      * @param string $courseCode
      * @param bool   $withBaseContent true if you want to get the elements that exists in the course and
      *                                in the session, (session_id = 0 or session_id = X)
+     * @param array $parseOnlyToolList
+     * @param array $toolsFromPost
      *
      * @return Course The course object structure
      */
     public function build(
         $session_id = 0,
         $courseCode = '',
-        $withBaseContent = false
+        $withBaseContent = false,
+        $parseOnlyToolList = [],
+        $toolsFromPost = []
     ) {
         $course = api_get_course_info($courseCode);
         $courseId = $course['real_id'];
-
         foreach ($this->tools_to_build as $tool) {
+            if (!empty($parseOnlyToolList) && !in_array($this->toolToName[$tool], $parseOnlyToolList)) {
+                continue;
+            }
             $function_build = 'build_'.$tool;
             $specificIdList = isset($this->specific_id_list[$tool]) ? $this->specific_id_list[$tool] : null;
+            $buildOrphanQuestions = true;
+            if ($tool == 'quizzes') {
+                if (!isset($toolsFromPost['quiz'][-1])) {
+                    $buildOrphanQuestions = false;
+                }
+                $this->build_quizzes(
+                    $session_id,
+                    $courseId,
+                    $withBaseContent,
+                    $specificIdList,
+                    $buildOrphanQuestions
+                );
+            } else {
                 $this->$function_build(
                     $session_id,
                     $courseId,
@@ -157,9 +199,10 @@ class CourseBuilder
                     $specificIdList
                 );
             }
+        }
 
         // Add asset
-        if ($course['course_image_source'] && basename($course['course_image_source']) != 'course.png') {
+        if ($course['course_image_source'] && basename($course['course_image_source']) !== 'course.png') {
             // Add course image courses/XXX/course-pic85x85.png
             $asset = new Asset(
                 $course['course_image_source'],
@@ -180,7 +223,11 @@ class CourseBuilder
         // from the item_property table and order them in the "resources" array
         $table = Database::get_course_table(TABLE_ITEM_PROPERTY);
         foreach ($this->course->resources as $type => $resources) {
+            if (!empty($parseOnlyToolList) && !in_array($this->toolToName[$tool], $parseOnlyToolList)) {
+                continue;
+            }
             foreach ($resources as $id => $resource) {
+                if ($resource) {
                     $tool = $resource->get_tool();
                     if ($tool != null) {
                         $sql = "SELECT * FROM $table
@@ -197,6 +244,7 @@ class CourseBuilder
                     }
                 }
             }
+        }
 
         return $this->course;
     }
@@ -230,7 +278,7 @@ class CourseBuilder
         }
 
         if (!empty($courseId) && !empty($session_id)) {
-            $session_id = intval($session_id);
+            $session_id = (int) $session_id;
             if ($withBaseContent) {
                 $session_condition = api_get_session_condition(
                     $session_id,
@@ -615,12 +663,14 @@ class CourseBuilder
      * @param int   $courseId        Internal course ID
      * @param bool  $withBaseContent Whether to include content from the course without session or not
      * @param array $idList          If you want to restrict the structure to only the given IDs
+     * @param bool  $buildOrphanQuestions
      */
     public function build_quizzes(
         $session_id = 0,
         $courseId = 0,
         $withBaseContent = false,
-        $idList = []
+        $idList = [],
+        $buildOrphanQuestions = true
     ) {
         $table_qui = Database::get_course_table(TABLE_QUIZ_TEST);
         $table_rel = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
@@ -634,7 +684,7 @@ class CourseBuilder
         }
 
         if (!empty($courseId) && !empty($session_id)) {
-            $session_id = intval($session_id);
+            $session_id = (int) $session_id;
             if ($withBaseContent) {
                 $sessionCondition = api_get_session_condition(
                     $session_id,
@@ -666,8 +716,8 @@ class CourseBuilder
         }
 
         $sql .= ' ORDER BY title';
-
         $db_result = Database::query($sql);
+        $questionList = [];
         while ($obj = Database::fetch_object($db_result)) {
             if (strlen($obj->sound) > 0) {
                 $sql = "SELECT id FROM $table_doc
@@ -676,20 +726,22 @@ class CourseBuilder
                 $doc = Database::fetch_object($res);
                 $obj->sound = $doc->id;
             }
+
             $quiz = new Quiz($obj);
             $sql = 'SELECT * FROM '.$table_rel.'
                     WHERE c_id = '.$courseId.' AND exercice_id = '.$obj->id;
             $db_result2 = Database::query($sql);
             while ($obj2 = Database::fetch_object($db_result2)) {
                 $quiz->add_question($obj2->question_id, $obj2->question_order);
+                $questionList[] = $obj2->question_id;
             }
             $this->course->add_resource($quiz);
         }
 
         if (!empty($courseId)) {
-            $this->build_quiz_questions($courseId);
+            $this->build_quiz_questions($courseId, $questionList, $buildOrphanQuestions);
         } else {
-            $this->build_quiz_questions();
+            $this->build_quiz_questions(0, $questionList, $buildOrphanQuestions);
         }
     }
 
@@ -697,19 +749,22 @@ class CourseBuilder
      * Build the Quiz-Questions.
      *
      * @param int   $courseId Internal course ID
+     * @param array $questionList
+     * @param bool  $buildOrphanQuestions
+     *
      */
-    public function build_quiz_questions($courseId = 0)
+    public function build_quiz_questions($courseId = 0, $questionList = [], $buildOrphanQuestions = true)
     {
         $table_qui = Database::get_course_table(TABLE_QUIZ_TEST);
         $table_rel = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
         $table_que = Database::get_course_table(TABLE_QUIZ_QUESTION);
         $table_ans = Database::get_course_table(TABLE_QUIZ_ANSWER);
-
         $courseId = (int) $courseId;
+        $questionListToString = implode("','", $questionList);
 
-        // Building normal tests.
+        // Building normal tests (many queries)
         $sql = "SELECT * FROM $table_que
-                WHERE c_id = $courseId ";
+                WHERE c_id = $courseId AND id IN ('$questionListToString')";
         $result = Database::query($sql);
 
         while ($obj = Database::fetch_object($result)) {
@@ -738,7 +793,6 @@ class CourseBuilder
             $sql = 'SELECT * FROM '.$table_ans.'
                     WHERE c_id = '.$courseId.' AND question_id = '.$obj->id;
             $db_result2 = Database::query($sql);
-
             while ($obj2 = Database::fetch_object($db_result2)) {
                 $question->add_answer(
                     $obj2->id,
@@ -764,9 +818,10 @@ class CourseBuilder
             $this->course->add_resource($question);
         }
 
+        if ($buildOrphanQuestions) {
             // Building a fictional test for collecting orphan questions.
             // When a course is emptied this option should be activated (true).
-        $build_orphan_questions = !empty($_POST['recycle_option']);
+            //$build_orphan_questions = !empty($_POST['recycle_option']);
 
             // 1st union gets the orphan questions from deleted exercises
             // 2nd union gets the orphan questions from question that were deleted in a exercise.
@@ -796,7 +851,6 @@ class CourseBuilder
 
             $result = Database::query($sql);
             if (Database::num_rows($result) > 0) {
-            $build_orphan_questions = true;
                 $orphanQuestionIds = [];
                 while ($obj = Database::fetch_object($result)) {
                     // Orphan questions
@@ -844,11 +898,11 @@ class CourseBuilder
                     }
                 }
             }
+        }
 
-        if ($build_orphan_questions) {
         $obj = [
             'id' => -1,
-                'title' => get_lang('OrphanQuestions', ''),
+            'title' => get_lang('OrphanQuestions'),
             'type' => 2,
         ];
         $newQuiz = new Quiz((object) $obj);
@@ -860,9 +914,9 @@ class CourseBuilder
         }
         $this->course->add_resource($newQuiz);
     }
-    }
 
     /**
+     * @deprecated
      * Build the orphan questions.
      */
     public function build_quiz_orphan_questions()

src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php

@@ -152,7 +152,7 @@ class CourseRestorer
         }
         $this->destination_course_id = $course_info['real_id'];
 
-        //Getting first teacher (for the forums)
+        // Getting first teacher (for the forums)
         $teacher_list = CourseManager::get_teacher_list_from_course_code(
             $course_info['code']
         );
@@ -207,7 +207,6 @@ class CourseRestorer
 
         // Restore the item properties
         $table = Database::get_course_table(TABLE_ITEM_PROPERTY);
-
         foreach ($this->course->resources as $type => $resources) {
             if (is_array($resources)) {
                 foreach ($resources as $id => $resource) {
@@ -222,7 +221,7 @@ class CourseRestorer
 
                             $params = [];
                             if (!empty($session_id)) {
-                                $params['session_id'] = intval($session_id);
+                                $params['session_id'] = (int) $session_id;
                             }
 
                             $res = Database::query($sql);
@@ -1080,7 +1079,7 @@ class CourseRestorer
     public function restore_forums($sessionId = 0)
     {
         if ($this->course->has_resources(RESOURCE_FORUM)) {
-            $sessionId = intval($sessionId);
+            $sessionId = (int) $sessionId;
             $table_forum = Database::get_course_table(TABLE_FORUM);
             $resources = $this->course->resources;
             foreach ($resources[RESOURCE_FORUM] as $id => $forum) {
@@ -1458,7 +1457,7 @@ class CourseRestorer
     public function restore_tool_intro($sessionId = 0)
     {
         if ($this->course->has_resources(RESOURCE_TOOL_INTRO)) {
-            $sessionId = intval($sessionId);
+            $sessionId = (int) $sessionId;
             $tool_intro_table = Database::get_course_table(TABLE_TOOL_INTRO);
             $resources = $this->course->resources;
             foreach ($resources[RESOURCE_TOOL_INTRO] as $id => $tool_intro) {
@@ -1503,7 +1502,7 @@ class CourseRestorer
     public function restore_events($sessionId = 0)
     {
         if ($this->course->has_resources(RESOURCE_EVENT)) {
-            $sessionId = intval($sessionId);
+            $sessionId = (int) $sessionId;
             $table = Database::get_course_table(TABLE_AGENDA);
             $resources = $this->course->resources;
             foreach ($resources[RESOURCE_EVENT] as $id => $event) {
@@ -1638,7 +1637,7 @@ class CourseRestorer
                 );
 
                 $params = [];
-                $session_id = intval($session_id);
+                $session_id = (int) $session_id;
                 $params['session_id'] = $session_id;
                 $params['c_id'] = $this->destination_course_id;
                 $params['description_type'] = self::DBUTF8($descriptionType);
@@ -1668,7 +1667,7 @@ class CourseRestorer
     public function restore_announcements($sessionId = 0)
     {
         if ($this->course->has_resources(RESOURCE_ANNOUNCEMENT)) {
-            $sessionId = intval($sessionId);
+            $sessionId = (int) $sessionId;
             $table = Database::get_course_table(TABLE_ANNOUNCEMENT);
             $resources = $this->course->resources;
             foreach ($resources[RESOURCE_ANNOUNCEMENT] as $id => $announcement) {
@@ -1880,7 +1879,7 @@ class CourseRestorer
                         $params['session_id'] = $my_session_id;
                     } else {
                         if (!empty($session_id)) {
-                            $session_id = intval($session_id);
+                            $session_id = (int) $session_id;
                             $params['session_id'] = $session_id;
                         }
                     }
@@ -1897,7 +1896,6 @@ class CourseRestorer
                 }
 
                 $this->course->resources[RESOURCE_QUIZ][$id]->destination_id = $new_id;
-
                 $order = 0;
                 if (!empty($quiz->question_ids)) {
                     foreach ($quiz->question_ids as $index => $question_id) {
@@ -1911,6 +1909,7 @@ class CourseRestorer
                         Database::query($sql);
                     }
                 }
+
             }
         }
     }
@@ -2030,7 +2029,6 @@ class CourseRestorer
                         $quizAnswer
                             ->setId($answerId)
                             ->setIdAuto($answerId);
-
                         $em->merge($quizAnswer);
                         $em->flush();
 
@@ -2299,7 +2297,7 @@ class CourseRestorer
      */
     public function restore_surveys($sessionId = 0)
     {
-        $sessionId = intval($sessionId);
+        $sessionId = (int) $sessionId;
         if ($this->course->has_resources(RESOURCE_SURVEY)) {
             $table_sur = Database::get_course_table(TABLE_SURVEY);
             $table_que = Database::get_course_table(TABLE_SURVEY_QUESTION);
@@ -2405,7 +2403,6 @@ class CourseRestorer
                             // Delete the existing survey with the same code and language and
                             // import the one of the source course
                             // getting the information of the survey (used for when the survey is shared)
-
                             $sql = "SELECT * FROM $table_sur
                                     WHERE
                                         c_id = ".$this->destination_course_id." AND
@@ -2641,7 +2638,7 @@ class CourseRestorer
                         }
                         $condition_session = $my_session_id;
                     } else {
-                        $session_id = intval($session_id);
+                        $session_id = (int) $session_id;
                         $condition_session = $session_id;
                     }
                 }
@@ -3011,7 +3008,7 @@ class CourseRestorer
             foreach ($resources[RESOURCE_GLOSSARY] as $id => $glossary) {
                 $params = [];
                 if (!empty($session_id)) {
-                    $session_id = intval($session_id);
+                    $session_id = (int) $session_id;
                     $params['session_id'] = $session_id;
                 }
 

src/Chamilo/CourseBundle/Component/CourseCopy/CourseSelectForm.php

@@ -18,6 +18,36 @@ use Display;
  */
 class CourseSelectForm
 {
+    /**
+     * @return array
+     */
+    public static function getResourceTitleList()
+    {
+        $list = [];
+        $list[RESOURCE_LEARNPATH_CATEGORY] = get_lang('Learnpath').' '.get_lang('Category');
+        $list[RESOURCE_ASSET] = get_lang('Assets');
+        $list[RESOURCE_GRADEBOOK] = get_lang('Gradebook');
+        $list[RESOURCE_EVENT] = get_lang('Events');
+        $list[RESOURCE_ANNOUNCEMENT] = get_lang('Announcements');
+        $list[RESOURCE_DOCUMENT] = get_lang('Documents');
+        $list[RESOURCE_LINK] = get_lang('Links');
+        $list[RESOURCE_COURSEDESCRIPTION] = get_lang('CourseDescription');
+        $list[RESOURCE_FORUM] = get_lang('Forums');
+        $list[RESOURCE_FORUMCATEGORY] = get_lang('ForumCategory');
+        $list[RESOURCE_QUIZ] = get_lang('Tests');
+        $list[RESOURCE_TEST_CATEGORY] = get_lang('QuestionCategory');
+        $list[RESOURCE_LEARNPATH] = get_lang('ToolLearnpath');
+        $list[RESOURCE_SCORM] = 'SCORM';
+        $list[RESOURCE_TOOL_INTRO] = get_lang('ToolIntro');
+        $list[RESOURCE_SURVEY] = get_lang('Survey');
+        $list[RESOURCE_GLOSSARY] = get_lang('Glossary');
+        $list[RESOURCE_WIKI] = get_lang('Wiki');
+        $list[RESOURCE_THEMATIC] = get_lang('Thematic');
+        $list[RESOURCE_ATTENDANCE] = get_lang('Attendance');
+        $list[RESOURCE_WORK] = get_lang('ToolStudentPublication');
+
+        return $list;
+    }
     /**
      * Display the form.
      *
@@ -34,27 +64,7 @@ class CourseSelectForm
         $avoidCourseInForm = false
     ) {
         global $charset;
-        $resource_titles[RESOURCE_LEARNPATH_CATEGORY] = get_lang('Learnpath').' '.get_lang('Category');
+        ?>
-        $resource_titles[RESOURCE_ASSET] = get_lang('Assets');
-        $resource_titles[RESOURCE_GRADEBOOK] = get_lang('Gradebook');
-        $resource_titles[RESOURCE_EVENT] = get_lang('Events');
-        $resource_titles[RESOURCE_ANNOUNCEMENT] = get_lang('Announcements');
-        $resource_titles[RESOURCE_DOCUMENT] = get_lang('Documents');
-        $resource_titles[RESOURCE_LINK] = get_lang('Links');
-        $resource_titles[RESOURCE_COURSEDESCRIPTION] = get_lang('CourseDescription');
-        $resource_titles[RESOURCE_FORUM] = get_lang('Forums');
-        $resource_titles[RESOURCE_FORUMCATEGORY] = get_lang('ForumCategory');
-        $resource_titles[RESOURCE_QUIZ] = get_lang('Tests');
-        $resource_titles[RESOURCE_TEST_CATEGORY] = get_lang('QuestionCategory');
-        $resource_titles[RESOURCE_LEARNPATH] = get_lang('ToolLearnpath');
-        $resource_titles[RESOURCE_SCORM] = 'SCORM';
-        $resource_titles[RESOURCE_TOOL_INTRO] = get_lang('ToolIntro');
-        $resource_titles[RESOURCE_SURVEY] = get_lang('Survey');
-        $resource_titles[RESOURCE_GLOSSARY] = get_lang('Glossary');
-        $resource_titles[RESOURCE_WIKI] = get_lang('Wiki');
-        $resource_titles[RESOURCE_THEMATIC] = get_lang('Thematic');
-        $resource_titles[RESOURCE_ATTENDANCE] = get_lang('Attendance');
-        $resource_titles[RESOURCE_WORK] = get_lang('ToolStudentPublication'); ?>
         <script>
             function exp(item) {
                 el = document.getElementById('div_'+item);
@@ -62,6 +72,7 @@ class CourseSelectForm
                     el.style.display = '';
                     $('#img_'+item).removeClass();
                     $('#img_'+item).addClass('fa fa-minus-square-o fa-lg');
+
                 } else {
                     el.style.display = 'none';
                     $('#img_'+item).removeClass();
@@ -157,6 +168,7 @@ class CourseSelectForm
             echo get_lang('DestinationCourse').' : '.$courseInfo['title'].' ('.$courseInfo['code'].') '.$sessionTitle;
             echo '</h3>';
         }
+
         echo '<script src="'.api_get_path(WEB_CODE_PATH).'inc/lib/javascript/upload.js" type="text/javascript"></script>';
         echo '<div class="tool-backups-options">';
         echo '<form method="post" id="upload_form" name="course_select_form">';
@@ -173,7 +185,6 @@ class CourseSelectForm
             echo '<input type="hidden" name="origin_session" value="'.$hidden_fields['origin_session'].'"/>';
         }
 
-        $element_count = 0;
         $forum_categories = [];
         $forums = [];
         $forum_topics = [];
@@ -183,98 +194,8 @@ class CourseSelectForm
         echo '</p>';
         echo Display::return_message(get_lang('DontForgetToSelectTheMediaFilesIfYourResourceNeedIt'));
 
-        foreach ($course->resources as $type => $resources) {
+        $resource_titles = self::getResourceTitleList();
-            if (count($resources) > 0) {
+        $element_count = self::parseResources($resource_titles, $course->resources, true, true);
-                switch ($type) {
-                    // Resources to avoid
-                    case RESOURCE_FORUMCATEGORY:
-                        foreach ($resources as $id => $resource) {
-                            $forum_categories[$id] = $resource;
-                        }
-                        $element_count++;
-                        break;
-                    case RESOURCE_FORUM:
-                        foreach ($resources as $id => $resource) {
-                            $forums[$resource->obj->forum_category][$id] = $resource;
-                        }
-                        $element_count++;
-                        break;
-                    case RESOURCE_FORUMTOPIC:
-                        foreach ($resources as $id => $resource) {
-                            $forum_topics[$resource->obj->forum_id][$id] = $resource;
-                        }
-                        $element_count++;
-                        break;
-                    case RESOURCE_LINKCATEGORY:
-                    case RESOURCE_FORUMPOST:
-                    case RESOURCE_QUIZQUESTION:
-                    case RESOURCE_SURVEYQUESTION:
-                    case RESOURCE_SURVEYINVITATION:
-                    case RESOURCE_SCORM:
-                        break;
-                    default:
-                        echo '<div class="item-backup" onclick="javascript:exp('."'$type'".');">';
-                        echo '<em id="img_'.$type.'" class="fa fa-plus-square-o fa-lg" ></em>';
-                        echo '<span class="title">'.$resource_titles[$type].'</span></div>';
-                        echo '<div class="item-content" id="div_'.$type.'">';
-                        if ($type == RESOURCE_LEARNPATH) {
-                            echo Display::return_message(
-                                get_lang(
-                                    'ToExportLearnpathWithQuizYouHaveToSelectQuiz'
-                                ),
-                                'warning'
-                            );
-                            echo Display::return_message(
-                                get_lang(
-                                    'IfYourLPsHaveAudioFilesIncludedYouShouldSelectThemFromTheDocuments'
-                                ),
-                                'warning'
-                            );
-                        }
-                        if ($type == RESOURCE_DOCUMENT) {
-                            if (api_get_setting('show_glossary_in_documents') != 'none') {
-                                echo Display::return_message(
-                                    get_lang(
-                                        'ToExportDocumentsWithGlossaryYouHaveToSelectGlossary'
-                                    ),
-                                    'warning'
-                                );
-                            }
-                        }
-
-                        echo '<div class="well">';
-                        echo '<div class="btn-group">';
-                        echo "<a class=\"btn btn-default\" 
-                                    href=\"javascript: void(0);\" 
-                                    onclick=\"javascript: setCheckbox('$type',true);\" >".get_lang('All')."</a>";
-                        echo "<a class=\"btn btn-default\" 
-                                    href=\"javascript: void(0);\" 
-                                    onclick=\"javascript:setCheckbox('$type',false);\" >".get_lang('None')."</a>";
-                        echo '</div>';
-                        echo '<ul class="list-backups-options">';
-                        foreach ($resources as $id => $resource) {
-                            if ($resource) {
-                                echo '<li>';
-                                // Event obj in 1.9.x in 1.10.x the class is CalendarEvent
-                                Resource::setClassType($resource);
-                                echo '<label class="checkbox">';
-                                echo '<input 
-                                    type="checkbox" 
-                                    name="resource['.$type.']['.$id.']"  
-                                    id="resource['.$type.']['.$id.']" />';
-                                $resource->show();
-                                echo '</label>';
-                                echo '</li>';
-                            }
-                        }
-                        echo '</ul>';
-                        echo '</div>';
-                        echo '</div>';
-                        echo '<script language="javascript">exp('."'$type'".')</script>';
-                        $element_count++;
-                }
-            }
-        }
 
         // Fixes forum order
         if (!empty($forum_categories)) {
@@ -395,6 +316,127 @@ class CourseSelectForm
         echo '<div id="dynamic_div" style="display:block;margin-left:40%;margin-top:10px;height:50px;"></div>';
     }
 
+    /**
+     * @param array $resource_titles
+     * @param array $resourceList
+     * @param bool  $showHeader
+     * @param bool  $showItems
+     *
+     * @return int
+     */
+    public static function parseResources(
+        $resource_titles,
+        $resourceList,
+        $showHeader = true,
+        $showItems = true
+    ) {
+        $element_count = 0;
+        foreach ($resourceList as $type => $resources) {
+            if (count($resources) > 0) {
+                switch ($type) {
+                    // Resources to avoid
+                    case RESOURCE_FORUMCATEGORY:
+                        foreach ($resources as $id => $resource) {
+                            $forum_categories[$id] = $resource;
+                        }
+                        $element_count++;
+                        break;
+                    case RESOURCE_FORUM:
+                        foreach ($resources as $id => $resource) {
+                            $forums[$resource->obj->forum_category][$id] = $resource;
+                        }
+                        $element_count++;
+                        break;
+                    case RESOURCE_FORUMTOPIC:
+                        foreach ($resources as $id => $resource) {
+                            $forum_topics[$resource->obj->forum_id][$id] = $resource;
+                        }
+                        $element_count++;
+                        break;
+                    case RESOURCE_LINKCATEGORY:
+                    case RESOURCE_FORUMPOST:
+                    case RESOURCE_QUIZQUESTION:
+                    case RESOURCE_SURVEYQUESTION:
+                    case RESOURCE_SURVEYINVITATION:
+                    case RESOURCE_SCORM:
+                        break;
+                    default:
+                        if ($showHeader) {
+                            echo '<div class="item-backup" onclick="javascript:exp('."'$type'".');">';
+                            echo '<em id="img_'.$type.'" class="fa fa-plus-square-o fa-lg"></em>';
+                            echo '<span class="title">'.$resource_titles[$type].'</span>';
+                            echo '</div>';
+                            echo '<div class="item-content" id="div_'.$type.'">';
+                        }
+
+                        if ($type == RESOURCE_LEARNPATH) {
+                            echo Display::return_message(
+                                get_lang(
+                                    'ToExportLearnpathWithQuizYouHaveToSelectQuiz'
+                                ),
+                                'warning'
+                            );
+                            echo Display::return_message(
+                                get_lang(
+                                    'IfYourLPsHaveAudioFilesIncludedYouShouldSelectThemFromTheDocuments'
+                                ),
+                                'warning'
+                            );
+                        }
+
+                        if ($type == RESOURCE_DOCUMENT) {
+                            if (api_get_setting('show_glossary_in_documents') != 'none') {
+                                echo Display::return_message(
+                                    get_lang(
+                                        'ToExportDocumentsWithGlossaryYouHaveToSelectGlossary'
+                                    ),
+                                    'warning'
+                                );
+                            }
+                        }
+
+                        if ($showItems) {
+                            echo '<div class="well">';
+                            echo '<div class="btn-group">';
+                            echo "<a class=\"btn btn-default\" 
+                                        href=\"javascript: void(0);\" 
+                                        onclick=\"javascript: setCheckbox('$type',true);\" >".get_lang('All')."</a>";
+                            echo "<a class=\"btn btn-default\" 
+                                        href=\"javascript: void(0);\" 
+                                        onclick=\"javascript:setCheckbox('$type',false);\" >".get_lang('None')."</a>";
+                            echo '</div>';
+                            echo '<ul class="list-backups-options">';
+                            foreach ($resources as $id => $resource) {
+                                if ($resource) {
+                                    echo '<li>';
+                                    // Event obj in 1.9.x in 1.10.x the class is CalendarEvent
+                                    Resource::setClassType($resource);
+                                    echo '<label class="checkbox">';
+                                    echo '<input 
+                                        type="checkbox" 
+                                        name="resource['.$type.']['.$id.']"  
+                                        id="resource['.$type.']['.$id.']" />';
+                                    $resource->show();
+                                    echo '</label>';
+                                    echo '</li>';
+                                }
+                            }
+                            echo '</ul>';
+                            echo '</div>';
+                        }
+
+                        if ($showHeader) {
+                            echo '</div>';
+                            echo '<script language="javascript">exp('."'$type'".')</script>';
+                        }
+                        $element_count++;
+                }
+            }
+        }
+
+        return $element_count;
+    }
+
     /**
      * @param $course
      */
@@ -638,6 +680,8 @@ class CourseSelectForm
                                         }
                                     }
                                 }
+                                // quiz question can be, not attached to an exercise
+                                if ($type != RESOURCE_QUIZQUESTION) {
                                     if (!isset($_POST['resource'][$type][$id]) && !$resource_is_used_elsewhere) {
                                         unset($course->resources[$type][$id]);
                                     }
@@ -646,6 +690,7 @@ class CourseSelectForm
                         }
                 }
             }
+        }
 
         return $course;
     }