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Arsse/lib/Db/MySQL/Driver.php

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<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\Db\MySQL;
use JKingWeb\Arsse\Arsse;
use JKingWeb\Arsse\Conf;
use JKingWeb\Arsse\Db\Exception;
use JKingWeb\Arsse\Db\ExceptionInput;
use JKingWeb\Arsse\Db\ExceptionTimeout;
class Driver extends \JKingWeb\Arsse\Db\AbstractDriver {
const SQL_MODE = "ANSI_QUOTES,HIGH_NOT_PRECEDENCE,NO_BACKSLASH_ESCAPES,NO_ENGINE_SUBSTITUTION,PIPES_AS_CONCAT,STRICT_ALL_TABLES";
const TRANSACTIONAL_LOCKS = false;
protected $db;
protected $transStart = 0;
public function __construct() {
// check to make sure required extension is loaded
if (!static::requirementsMet()) {
throw new Exception("extMissing", static::driverName()); // @codeCoverageIgnore
}
$host = Arsse::$conf->dbMySQLHost;
if ($host[0] == "/") {
// host is a socket
$socket = $host;
$host = "";
} elseif(substr($host, 0, 9) == "\\\\.\\pipe\\") {
// host is a Windows named piple
$socket = substr($host, 10);
$host = "";
}
$user = Arsse::$conf->dbMySQLUser ?? "";
$pass = Arsse::$conf->dbMySQLPass ?? "";
$port = Arsse::$conf->dbMySQLPost ?? 3306;
$db = Arsse::$conf->dbMySQLDb ?? "arsse";
$this->makeConnection($user, $pass, $db, $host, $port, $socket ?? "");
$this->exec("SET lock_wait_timeout = 1");
$this->exec("SET time_zone = '+00:00'");
}
/** @codeCoverageIgnore */
public static function create(): \JKingWeb\Arsse\Db\Driver {
if (self::requirementsMet()) {
return new self;
} elseif (PDODriver::requirementsMet()) {
return new PDODriver;
} else {
throw new Exception("extMissing", self::driverName());
}
}
public static function schemaID(): string {
return "MySQL";
}
public function charsetAcceptable(): bool {
return true;
}
public function schemaVersion(): int {
if ($this->query("SELECT count(*) from information_schema.tables where table_name = 'arsse_meta'")->getValue()) {
return (int) $this->query("SELECT value from arsse_meta where `key` = 'schema_version'")->getValue();
} else {
return 0;
}
}
public function sqlToken(string $token): string {
switch (strtolower($token)) {
case "nocase":
return '"utf8mb4_unicode_ci"';
default:
return $token;
}
}
public function savepointCreate(bool $lock = false): int {
if (!$this->transStart && !$lock) {
$this->exec("BEGIN");
$this->transStart = parent::savepointCreate($lock);
return $this->transStart;
} else {
return parent::savepointCreate($lock);
}
}
public function savepointRelease(int $index = null): bool {
$index = $index ?? $this->transDepth;
$out = parent::savepointRelease($index);
if ($index == $this->transStart) {
$this->exec("COMMIT");
$this->transStart = 0;
}
return $out;
}
public function savepointUndo(int $index = null): bool {
$index = $index ?? $this->transDepth;
$out = parent::savepointUndo($index);
if ($index == $this->transStart) {
$this->exec("ROLLBACK");
$this->transStart = 0;
}
return $out;
}
protected function lock(): bool {
$tables = $this->query("SELECT table_name as name from information_schema.tables where table_schema = database() and table_name like 'arsse_%'")->getAll();
if ($tables) {
$tables = array_column($tables, "name");
$tables = array_map(function($table) {
$table = str_replace('"', '""', $table);
return "\"$table\" write";
}, $tables);
$tables = implode(", ", $tables);
try {
$this->exec("SET lock_wait_timeout = 1; LOCK TABLES $tables");
} finally {
$this->exec("SET lock_wait_timeout = 60");
}
}
return true;
}
protected function unlock(bool $rollback = false): bool {
$this->exec("UNLOCK TABLES");
return true;
}
public function __destruct() {
if (isset($this->db)) {
$this->db->close();
unset($this->db);
}
}
public static function driverName(): string {
return Arsse::$lang->msg("Driver.Db.MySQL.Name");
}
public static function requirementsMet(): bool {
return false;
}
protected function makeConnection(string $db, string $user, string $password, string $host, int $port, string $socket) {
}
protected function getError(): string {
}
public function exec(string $query): bool {
}
public function query(string $query): \JKingWeb\Arsse\Db\Result {
}
public function prepareArray(string $query, array $paramTypes): \JKingWeb\Arsse\Db\Statement {
}
}