class.arConnectorSession.php

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<?php
 
/******************************************************************************
 *
 * This file is part of ILIAS, a powerful learning management system.
 *
 * ILIAS is licensed with the GPL-3.0, you should have received a copy
 * of said license along with the source code.
 *
 * If this is not the case or you just want to try ILIAS, you'll find
 * us at:
 * https://www.ilias.de
 * https://github.com/ILIAS-eLearning
 *
 *****************************************************************************/
class arConnectorSession extends arConnector
{
    public const AR_CONNECTOR_SESSION = 'arConnectorSession';
 
    public static function resetSession(): void
    {
        $_SESSION[self::AR_CONNECTOR_SESSION] = array();
    }
 
    public static function getSession(): array
    {
        if (!$_SESSION[self::AR_CONNECTOR_SESSION]) {
            self::resetSession();
        }
 
        return $_SESSION[self::AR_CONNECTOR_SESSION];
    }
 
    public static function getSessionForActiveRecord(ActiveRecord $ar): array
    {
        $session = self::getSession();
        $ar_session = $session[$ar::returnDbTableName()];
        if (!is_array($ar_session)) {
            $ar_session = array();
        }
 
        return $ar_session;
    }
 
    public function checkConnection(ActiveRecord $ar): bool
    {
        return is_array(self::getSession());
    }
 
    public function nextID(ActiveRecord $ar): int
    {
        return count(self::getSessionForActiveRecord($ar)) + 1;
    }
 
    public function installDatabase(ActiveRecord $ar, array $fields): bool
    {
        return $this->resetDatabase($ar);
    }
 
    public function updateDatabase(ActiveRecord $ar): bool
    {
        return true;
    }
 
    public function resetDatabase(ActiveRecord $ar): bool
    {
        $_SESSION[self::AR_CONNECTOR_SESSION][$ar::returnDbTableName()] = array();
 
        return true;
    }
 
    public function truncateDatabase(ActiveRecord $ar): bool
    {
        return $this->resetDatabase($ar);
    }
 
    public function checkTableExists(ActiveRecord $ar): bool
    {
        return is_array(self::getSessionForActiveRecord($ar));
    }
 
    public function checkFieldExists(ActiveRecord $ar, string $field_name): bool
    {
        $session = self::getSessionForActiveRecord($ar);
 
        return array_key_exists($field_name, $session[0]);
    }
 
    public function removeField(ActiveRecord $ar, string $field_name): bool
    {
        return true;
    }
 
    public function renameField(ActiveRecord $ar, string $old_name, string $new_name): bool
    {
        return true;
    }
 
    public function create(ActiveRecord $ar): void
    {
        $_SESSION[self::AR_CONNECTOR_SESSION][$ar::returnDbTableName()][$ar->getPrimaryFieldValue()] = $ar->asStdClass();
    }
 
    public function read(ActiveRecord $ar): array
    {
        $session = self::getSessionForActiveRecord($ar);
 
        return array($session[$ar->getPrimaryFieldValue()]);
    }
 
    public function update(ActiveRecord $ar): void
    {
        $this->create($ar);
    }
 
    public function delete(ActiveRecord $ar): void
    {
        unset($_SESSION[self::AR_CONNECTOR_SESSION][$ar::returnDbTableName()][$ar->getPrimaryFieldValue()]);
    }
 
    public function readSet(ActiveRecordList $arl): array
    {
        $session = self::getSessionForActiveRecord($arl->getAR());
        foreach ($session as $i => $s) {
            $session[$i] = (array) $s;
        }
        foreach ($arl->getArWhereCollection()->getWheres() as $w) {
            $fieldname = $w->getFieldname();
            $v = $w->getValue();
            $operator = $w->getOperator();
 
            foreach ($session as $i => $s) {
                $session[$i] = (array) $s;
                if (($operator === '=') && $s[$fieldname] !== $v) {
                    unset($session[$i]);
                }
            }
        }
 
        return $session;
    }
 
    public function affectedRows(ActiveRecordList $arl): int
    {
        return count($this->readSet($arl));
    }
 
    public function quote($value, string $type): string
    {
        return $value;
    }
 
    public function updateIndices(ActiveRecord $ar): void
    {
        // TODO: Implement updateIndices() method.
    }
}