nextcloud/apps/files_versions/ajax/getVersions.php

<?php

require_once('../../../lib/base.php');
OC_JSON::checkAppEnabled('files_versions');
require_once('../versions.php');

$userDirectory = "/".OCP\USER::getUser()."/files";
$source = $_GET['source'];
$source = strip_tags( $source );

if( OCA_Versions\Storage::isversioned( $source ) ) {

	$count=5; //show the newest revisions
	$versions = OCA_Versions\Storage::getversions( $source, $count);
	$versionsFormatted = array();
	
	foreach ( $versions AS $version ) {
	
		$versionsFormatted[] = OCP\Util::formatDate( $version );
		
	}

	$versionsSorted = array_reverse( $versionsFormatted );
	
	if ( !empty( $versionsSorted ) ) {
		OC_JSON::encodedPrint($versionsSorted);
	}
	
}else{

	return;
	
}

// $path = $source;
// $users = array();
// if ($users = OC_Share::getMySharedItem($source)) {
// 	for ($i = 0; $i < count($users); $i++) {
// 		if ($users[$i]['uid_shared_with'] == OC_Share::PUBLICLINK) {
// 			$users[$i]['token'] = OC_Share::getTokenFromSource($source);
// 		}
// 	}
// }
// $source = dirname($source);
// while ($source != "" && $source != "/" && $source != "." && $source != $userDirectory) {
// 	if ($values = OC_Share::getMySharedItem($source)) {
// 		$values = array_values($values);
// 		$parentUsers = array();
// 		for ($i = 0; $i < count($values); $i++) {
// 			if ($values[$i]['uid_shared_with'] == OC_Share::PUBLICLINK) {
// 				$values[$i]['token'] = OC_Share::getTokenFromSource($source)."&path=".substr($path, strlen($source));
// 			}
// 			$parentUsers[basename($source)."-".$i] = $values[$i];
// 		}
// 		$users = array_merge($users, $parentUsers);
// 	}
// 	$source = dirname($source);
// }
// if (!empty($users)) {
// 	OC_JSON::encodedPrint($users);
// }