class.ilSessionIStorage.php

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<?php

declare(strict_types=1);

class ilSessionIStorage
{
    private string $session_id = "";
    private string $component_id;
    private static array $values = [];

    public function __construct(string $a_component_id, string $a_sess_id = "")
    {
        $this->component_id = $a_component_id;
        if ($a_sess_id !== "") {
            $this->session_id = $a_sess_id;
        } else {
            $this->session_id = session_id();
        }
    }

    private function initComponentCacheIfNotExists(): void
    {
        if (!isset(self::$values[$this->component_id]) || !is_array(self::$values[$this->component_id])) {
            self::$values[$this->component_id] = [];
        }
    }

    public function set(string $a_key, string $a_val): void
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];

        $this->initComponentCacheIfNotExists();

        self::$values[$this->component_id][$a_key] = $a_val;
        $ilDB->replace(
            "usr_sess_istorage",
            array(
                "session_id" => array("text", $this->session_id),
                "component_id" => array("text", $this->component_id),
                "vkey" => array("text", $a_key)
                ),
            array("value" => array("text", $a_val))
        );
    }

    public function get(string $a_key): string
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];

        if (isset(self::$values[$this->component_id][$a_key]) && is_array(self::$values[$this->component_id])) {
            return self::$values[$this->component_id][$a_key];
        }

        $set = $ilDB->query(
            "SELECT value FROM usr_sess_istorage " .
            " WHERE session_id = " . $ilDB->quote($this->session_id, "text") .
            " AND component_id = " . $ilDB->quote($this->component_id, "text") .
            " AND vkey = " . $ilDB->quote($a_key, "text")
        );
        $rec = $ilDB->fetchAssoc($set);
        $value = (string) ($rec['value'] ?? '');

        $this->initComponentCacheIfNotExists();

        self::$values[$this->component_id][$a_key] = $value;

        return $value;
    }

    public static function destroySession($a_session_id): void
    {
        global $DIC;

        if (!is_array($a_session_id)) {
            $q = "DELETE FROM usr_sess_istorage WHERE session_id = " .
                $DIC->database()->quote($a_session_id, "text");
        } else {
            $q = "DELETE FROM usr_sess_istorage WHERE " .
                $DIC->database()->in("session_id", $a_session_id, false, "text");
        }

        $DIC->database()->manipulate($q);
    }
}