Airship\Cabin\Bridge\Blueprint\Skyport::getAvailableUpgrades PHP Method

    protected function getAvailableUpgrades(array $ext = []) : array
    {
        $current = $this->db->cell('SELECT versionid FROM airship_package_versions WHERE package = ? AND version = ?', $ext['packageid'], $ext['current_version']);
        $available = $this->db->first('SELECT version FROM airship_package_versions WHERE package = ? AND versionid > ?', $ext['packageid'], $current);
        if (empty($available)) {
            return [];
        }
        $version = new Version($ext['current_version']);
        $results = [];
        foreach ($available as $ver) {
            if ($version->isUpgrade($ver)) {
                $results[] = $ver;
            }
        }
        $ext['upgrades'] = $results;
        return $ext;
    }