ilLSGlobalSettingsDB.php

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<?php declare(strict_types=1);

class ilLSGlobalSettingsDB implements LSGlobalSettingsDB
{
    const SETTING_POLL_INTERVAL = 'lso_polling_interval';
    const POLL_INTERVAL_DEFAULT = 10; //in seconds

    protected $il_settings;

    public function __construct(\ilSetting $il_settings)
    {
        $this->il_settings = $il_settings;
    }

    public function getSettings() : LSGlobalSettings
    {
        $interval_seconds = (float) $this->il_settings->get(
            self::SETTING_POLL_INTERVAL,
            self::POLL_INTERVAL_DEFAULT
        );

        return new LSGlobalSettings($interval_seconds);
    }

    public function storeSettings(LSGlobalSettings $settings)
    {
        $this->il_settings->set(
            self::SETTING_POLL_INTERVAL,
            $settings->getPollingIntervalSeconds()
        );
    }
}