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<?php
/*
 * Copyright (c) 2022 Xibo Signage Ltd
 *
 * Xibo - Digital Signage - http://www.xibo.org.uk
 *
 * This file is part of Xibo.
 *
 * Xibo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * Xibo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Xibo.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Xibo\Storage;

use Xibo\Service\LogService;
use Xibo\Support\Exception\DeadlockException;

/**
 * Interface StorageInterface
 * @package Xibo\Storage
 */
interface StorageServiceInterface
{
    /**
     * PDOConnect constructor.
     * @param LogService $logger
     */
    public function __construct($logger);

/**
     * Set a connection
     * @param string $name
     * @return $this
     */
    public function setConnection($name = 'default');

/**
     * Closes the stored connection
     * @param string|null $name The name of the connection, or null for all connections
     */
    public function close($name = null);

/**
     * Open a new connection using the stored details
     * @param $name string The name of the connection, e.g. "default"
     * @return \PDO
     */
    public static function newConnection(string $name);

/**
     * Open a connection with the specified details
     * @param string $host
     * @param string $user
     * @param string $pass
     * @param string|null $name
     * @param string|null $ssl
     * @param boolean $sslVerify
     * @return \PDO
     */
    public function connect($host, $user, $pass, $name = null, $ssl = null, $sslVerify = true);

/**
     * Get the Raw Connection
     * @param string $name The connection name
     * @return \PDO
     */
    public function getConnection($name = 'default');

/**
     * Check to see if the query returns records
     * @param string $sql
     * @param array $params
     * @param string|null $connection Note: the transaction for non-default connections is not automatically committed
     * @param bool $reconnect
     * @param bool $close
     * @return bool
     */
    public function exists($sql, $params, $connection = 'default', $reconnect = false, $close = false);

/**
     * Run Insert SQL
     * @param string $sql
     * @param array $params
     * @param string|null $connection Note: the transaction for non-default connections is not automatically committed
     * @param bool $reconnect
     * @param bool $close
     * @return int
     * @throws \PDOException
     */
    public function insert($sql, $params, $connection = 'default', $reconnect = false, $transaction = true, $close = false);

/**
     * Run Update SQL
     * @param string $sql
     * @param array $params
     * @param string|null $connection Note: the transaction for non-default connections is not automatically committed
     * @param bool $reconnect
     * @param bool $transaction If we are already in a transaction, then do nothing. Otherwise, start one.
     * @param bool $close
     * @return int affected rows
     * @throws \PDOException
     */
    public function update($sql, $params, $connection = 'default', $reconnect = false, $transaction = true, $close = false);

/**
     * Run Select SQL
     * @param $sql
     * @param $params
     * @param string|null $connection Note: the transaction for non-default connections is not automatically committed
     * @param bool $reconnect
     * @param bool $close
     * @return array
     * @throws \PDOException
     */
    public function select($sql, $params, $connection = 'default', $reconnect = false, $close = false);

/**
     * Run the SQL statement with a deadlock loop
     * @param $sql
     * @param $params
     * @param string|null $connection Note: the transaction for non-default connections is not automatically committed
     * @param bool $close
     * @param bool $transaction If we are already in a transaction, then do nothing. Otherwise, start one.
     * @return mixed
     * @throws DeadlockException
     */
    public function updateWithDeadlockLoop($sql, $params, $connection = 'default', $transaction = true, $close = false);

/**
     * Commit if necessary
     * @param $name
     * @param bool $close
     */
    public function commitIfNecessary($name = 'default', $close = false);

/**
     * Set the TimeZone for this connection
     * @param string|null $connection
     * @param string $timeZone e.g. -8:00
     */
    public function setTimeZone($timeZone, $connection = 'default');

/**
     * PDO stats
     * @return array
     */
    public function stats();

/**
     * @param $connection
     * @param $key
     * @return mixed
     */
    public static function incrementStat($connection, $key);

/**
     * Get the Storage engine version
     * @return string
     */
    public function getVersion();
}