<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

/**
 * EncryptionLib
 *
 * @uses TikiDb_Bridge
 */
class EncryptionLib extends TikiDb_Bridge
{
    private $encryption_keys;

    /**
     *
     */
    public function __construct()
    {
        $this->encryption_keys = $this->table('tiki_encryption_keys');
    }

    public function get_keys()
    {
        return $this->encryption_keys->fetchAll();
    }

    public function get_key($keyId)
    {
        return $this->encryption_keys->fetchFullRow(['keyId' => $keyId]);
    }

    public function set_key($keyId, $data)
    {
        $existing = $this->get_key($keyId);
        if ($existing) {
            $this->encryption_keys->update($data, ['keyId' => $keyId]);
            return $keyId;
        } else {
            return $this->encryption_keys->insert($data);
        }
    }

    public function delete_key($keyId)
    {
        $this->encryption_keys->delete(['keyId' => $keyId]);

        $userPreferences = $this->table('tiki_user_preferences', false);
        $userPreferences->deleteMultiple(['prefName' => $userPreferences->expr('$$ LIKE ?', ['%.sk.' . $keyId])]);

        return true;
    }

    public function get_encrypted_fields()
    {
        $table = $this->table('tiki_tracker_fields');
        $result = $table->fetchAll(['fieldId', 'trackerId', 'name', 'encryptionKeyId'], ['encryptionKeyId' => $table->expr('$$ IS NOT NULL AND $$ > 0')]);
        $fields = [];
        foreach ($result as $row) {
            $fields[$row['encryptionKeyId']][] = $row;
        }
        return $fields;
    }
}