Work: Allow invisible folders from documents - refs BT#20589

main/inc/lib/document.lib.php

@@ -3490,8 +3490,8 @@ class DocumentManager
 
         // If we are in LP display hidden folder https://support.chamilo.org/issues/6679
         $lp_visibility_condition = null;
-        if ($lp_id) {
-            if ($showInvisibleFiles) {
+        if ($lp_id || $showOnlyFolders) {
+            if ($showInvisibleFiles || $showOnlyFolders) {
                 $lp_visibility_condition .= ' OR last.visibility = 0';
             }
         }
@@ -3600,6 +3600,14 @@ class DocumentManager
                     api_get_user_id()
                 );
 
+                if ($showOnlyFolders) {
+                    $isFolder = ('folder' === $resource['filetype']);
+                    $visibility = (int) $resource['visibility'];
+                    if (!$isFolder && 0 == $visibility) {
+                        continue;
+                    }
+                }
+
                 if ($showInvisibleFiles === false) {
                     if (!$is_visible) {
                         continue;

main/work/add_document.php

@@ -82,7 +82,7 @@ if (empty($docId)) {
         '/',
         api_get_path(WEB_CODE_PATH).'work/add_document.php?id='.$workId.'&'.api_get_cidreq(),
         false,
-        false,
+        true,
         false,
         false
     );