friendica/mod/filer.php

<?php

use Friendica\App;
use Friendica\Core\PConfig;

require_once('include/security.php');
require_once('include/bbcode.php');
require_once('include/items.php');

function filer_content(App $a) {

	if (! local_user()) {
		killme();
	}

	$term = unxmlify(trim($_GET['term']));
	$item_id = (($a->argc > 1) ? intval($a->argv[1]) : 0);

	logger('filer: tag ' . $term . ' item ' . $item_id);

	if($item_id && strlen($term)){
		// file item
		file_tag_save_file(local_user(),$item_id,$term);
	} else {
		// return filer dialog
		$filetags = PConfig::get(local_user(),'system','filetags');
		$filetags = file_tag_file_to_list($filetags,'file');
                $filetags = explode(",", $filetags);

		$tpl = get_markup_template("filer_dialog.tpl");
		$o = replace_macros($tpl, [
			'$field' => ['term', t("Save to Folder:"), '', '', $filetags, t('- select -')],
			'$submit' => t('Save'),
		]);

		echo $o;
	}
	killme();
}