Update website

admin/phpMyAdmin/libraries/classes/Replication.php

@@ -0,0 +1,170 @@
+<?php
+/**
+ * Replication helpers
+ */
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin;
+
+use function explode;
+use function mb_strtoupper;
+
+/**
+ * PhpMyAdmin\Replication class
+ */
+class Replication
+{
+    /**
+     * Extracts database or table name from string
+     *
+     * @param string $string contains "dbname.tablename"
+     * @param string $what   what to extract (db|table)
+     *
+     * @return string the extracted part
+     */
+    public function extractDbOrTable($string, $what = 'db')
+    {
+        $list = explode('.', $string);
+        if ($what === 'db') {
+            return $list[0];
+        }
+
+        return $list[1];
+    }
+
+    /**
+     * Configures replication slave
+     *
+     * @param string      $action  possible values: START or STOP
+     * @param string|null $control default: null,
+     *                             possible values: SQL_THREAD or IO_THREAD or null.
+     *                             If it is set to null, it controls both
+     *                             SQL_THREAD and IO_THREAD
+     * @param int         $link    mysql link
+     *
+     * @return mixed|int output of DatabaseInterface::tryQuery
+     */
+    public function slaveControl(string $action, ?string $control, int $link)
+    {
+        global $dbi;
+
+        $action = mb_strtoupper($action);
+        $control = $control !== null ? mb_strtoupper($control) : '';
+
+        if ($action !== 'START' && $action !== 'STOP') {
+            return -1;
+        }
+        if ($control !== 'SQL_THREAD' && $control !== 'IO_THREAD' && $control != null) {
+            return -1;
+        }
+
+        return $dbi->tryQuery($action . ' SLAVE ' . $control . ';', $link);
+    }
+
+    /**
+     * Changes master for replication slave
+     *
+     * @param string $user     replication user on master
+     * @param string $password password for the user
+     * @param string $host     master's hostname or IP
+     * @param int    $port     port, where mysql is running
+     * @param array  $pos      position of mysql replication,
+     *                         array should contain fields File and Position
+     * @param bool   $stop     shall we stop slave?
+     * @param bool   $start    shall we start slave?
+     * @param int    $link     mysql link
+     *
+     * @return string output of CHANGE MASTER mysql command
+     */
+    public function slaveChangeMaster(
+        $user,
+        $password,
+        $host,
+        $port,
+        array $pos,
+        bool $stop,
+        bool $start,
+        int $link
+    ) {
+        global $dbi;
+
+        if ($stop) {
+            $this->slaveControl('STOP', null, $link);
+        }
+
+        $out = $dbi->tryQuery(
+            'CHANGE MASTER TO ' .
+            'MASTER_HOST=\'' . $host . '\',' .
+            'MASTER_PORT=' . ($port * 1) . ',' .
+            'MASTER_USER=\'' . $user . '\',' .
+            'MASTER_PASSWORD=\'' . $password . '\',' .
+            'MASTER_LOG_FILE=\'' . $pos['File'] . '\',' .
+            'MASTER_LOG_POS=' . $pos['Position'] . ';',
+            $link
+        );
+
+        if ($start) {
+            $this->slaveControl('START', null, $link);
+        }
+
+        return $out;
+    }
+
+    /**
+     * This function provides connection to remote mysql server
+     *
+     * @param string $user     mysql username
+     * @param string $password password for the user
+     * @param string $host     mysql server's hostname or IP
+     * @param int    $port     mysql remote port
+     * @param string $socket   path to unix socket
+     *
+     * @return mixed mysql link on success
+     */
+    public function connectToMaster(
+        $user,
+        $password,
+        $host = null,
+        $port = null,
+        $socket = null
+    ) {
+        global $dbi;
+
+        $server = [];
+        $server['user'] = $user;
+        $server['password'] = $password;
+        $server['host'] = Core::sanitizeMySQLHost($host);
+        $server['port'] = $port;
+        $server['socket'] = $socket;
+
+        // 5th parameter set to true means that it's an auxiliary connection
+        // and we must not go back to login page if it fails
+        return $dbi->connect(DatabaseInterface::CONNECT_AUXILIARY, $server);
+    }
+
+    /**
+     * Fetches position and file of current binary log on master
+     *
+     * @param int $link mysql link
+     *
+     * @return array an array containing File and Position in MySQL replication
+     * on master server, useful for slaveChangeMaster()
+     *
+     * @phpstan-return array{'File'?: string, 'Position'?: string}
+     */
+    public function slaveBinLogMaster(int $link): array
+    {
+        global $dbi;
+
+        $data = $dbi->fetchResult('SHOW MASTER STATUS', null, null, $link);
+        $output = [];
+
+        if (! empty($data)) {
+            $output['File'] = $data[0]['File'];
+            $output['Position'] = $data[0]['Position'];
+        }
+
+        return $output;
+    }
+}