Fix certificate dir creation.

main/document/document.php

@@ -95,6 +95,9 @@ if ($capturePluginInstalled) {
     </script>';
 }
 
+// Create directory certificates.
+DocumentManager::create_directory_certificate_in_course(api_get_course_id());
+
 if (empty($courseInfo)) {
     api_not_allowed(true);
 }
@@ -1617,7 +1620,7 @@ if ($is_allowed_to_edit ||
     if ($is_certificate_mode) {
         $actions .= Display::url(
             Display::return_icon('upload_certificate.png', get_lang('UploadCertificate'), '', ICON_SIZE_MEDIUM),
-            api_get_path(WEB_CODE_PATH).'document/upload.php?'.api_get_cidreq().'&id='.$current_folder_id
+            api_get_path(WEB_CODE_PATH).'document/upload.php?'.api_get_cidreq().'&&certificate=true&id='.$current_folder_id
         );
     } else {
         $actions .= Display::url(

main/document/upload.php

@@ -178,6 +178,7 @@ if ($groupId != 0) {
 }
 if (isset($_REQUEST['certificate'])) {
     $nameTools = get_lang('UploadCertificate').$add_group_to_title;
+    $is_certificate_mode = true;
 } else {
     $nameTools = get_lang('UplUploadDocument').$add_group_to_title;
 }

main/inc/lib/document.lib.php

@@ -1952,7 +1952,10 @@ class DocumentManager
             $post_dir_name = get_lang('CertificatesFiles');
             $visibility_command = 'invisible';
 
-            if (!is_dir($base_work_dir_test)) {
+            $id = self::get_document_id_of_directory_certificate();
+
+            if (empty($id)) {
+
                 create_unexisting_directory(
                     $courseInfo,
                     api_get_user_id(),
@@ -1961,10 +1964,28 @@ class DocumentManager
                     $to_user_id,
                     $base_work_dir,
                     $dir_name,
-                    $post_dir_name
+                    $post_dir_name,
+                    null,
+                    false
                 );
+
                 $id = self::get_document_id_of_directory_certificate();
 
+                if (empty($id)) {
+
+                    $id = add_document(
+                        $courseInfo,
+                        $dir_name,
+                        'folder',
+                        0,
+                        $post_dir_name,
+                        null,
+                        0,
+                        true,
+                        $to_group_id
+                    );
+                }
+
                 if (!empty($id)) {
                     api_item_property_update(
                         $courseInfo,