/** * Overwrite an existing file in a draft area. * * @param stored_file $newfile the new file with the new content and meta-data * @param stored_file $existingfile the file that will be overwritten * @throws moodle_exception * @since Moodle 3.2 */ function file_overwrite_existing_draftfile(stored_file $newfile, stored_file $existingfile) { if ($existingfile->get_component() != 'user' or $existingfile->get_filearea() != 'draft') { throw new coding_exception('The file to overwrite is not in a draft area.'); } $fs = get_file_storage(); // Remember original file source field. $source = @unserialize($existingfile->get_source()); // Remember the original sortorder. $sortorder = $existingfile->get_sortorder(); if ($newfile->is_external_file()) { // New file is a reference. Check that existing file does not have any other files referencing to it if (isset($source->original) && $fs->search_references_count($source->original)) { throw new moodle_exception('errordoublereference', 'repository'); } } // Delete existing file to release filename. $newfilerecord = array('contextid' => $existingfile->get_contextid(), 'component' => 'user', 'filearea' => 'draft', 'itemid' => $existingfile->get_itemid(), 'timemodified' => time()); $existingfile->delete(); // Create new file. $newfile = $fs->create_file_from_storedfile($newfilerecord, $newfile); // Preserve original file location (stored in source field) for handling references. if (isset($source->original)) { if (!($newfilesource = @unserialize($newfile->get_source()))) { $newfilesource = new stdClass(); } $newfilesource->original = $source->original; $newfile->set_source(serialize($newfilesource)); } $newfile->set_sortorder($sortorder); }