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sql.inc.php
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sql.inc.php
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<?php
/**
* $KYAULabs: sql.inc.php,v 1.0.6 2024/07/22 23:03:33 -0700 kyau Exp $
* ▄▄▄▄ ▄▄▄▄ ▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
* █ ▄▄ ▄ ▄▄ ▄ ▄▄▄▄ ▄▄ ▄ ▄▄ ▄▄▄▄ ▄▄▄▄ ▄▄▄ ▀
* █ ██ █ ██ █ ██ █ ██ █ ██ ██ █ ██ █ ██▀ █
* ■ ██▄▀ ██▄█ ██▄█ ██ █ ▀▀ ██ ██▄█ ██▄▀ ▀██▄ ■
* █ ██ █ ▄▄ █ ██ █ ██ █ ██▄▄ ██ █ ██ █ ▄██ █
* ▄ ▀▀ ▀ ▀▀▀▀ ▀▀ ▀ ▀▀▀▀ ▀▀▀▀ ▀▀ ▀ ▀▀▀▀ ▀▀▀ █
* ▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀
*
* Aurora HTML5 Template Engine
* Copyright (C) 2024 KYAU Labs (https://kyaulabs.com)
*
* This program 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 (at your option) any later version.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace KYAULabs;
use \Exception as Exception;
use \PDO as PDO;
use \PDOException as PDOException;
use \PDOStatement as PDOStatement;
/**
* SQL Handler
*
* Aurora is built for rapid deployment of Ajax loaded content pages. It
* is an attempt at using the most up-to-date HTML5 spec / web standards in
* use today.
*/
class SQLHandler
{
public const INTERNAL_HANDLING = 1;
public const THROW_EXCEPTION = 2;
public const IGNORE_ERRORS = 3;
private const SQL_HOST = '127.0.0.1';
private const SQL_PORT = 3306;
public $pdo = null;
public $result = null;
private $db = null;
private $err = self::INTERNAL_HANDLING;
/*
* Create a new database handler object to interact with the database.
* @param string $user Username to connect with.
* @param string $passwd Password associated with the username.
* @param string $db The database to connect to. This is required.
* @param array $options PDO connection options array. This is optional and will override defaults.
*/
public function __construct(string $db = null, $options = [])
{
// Enable unicode and set default timezone to UTC.
mb_internal_encoding('UTF-8');
ini_set('default_charset', 'UTF-8');
date_default_timezone_set('UTC');
$user = "";
$passwd = "";
if (file_exists(__DIR__ . 'settings.inc.php')) include_once(__DIR__ . '/settings.inc.php');
if ($db == null) {
throw new Exception('Required parameter is null.');
return;
}
if (! defined('SQL_USER')) {
throw new Exception('No settings.inc.php exists.');
return;
} else {
$user = SQL_USER;
$passwd = SQL_PASSWD;
}
$defaults = [
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
];
$options = array_replace($defaults, $options);
$this->db = $db;
$dsn = "mysql:host=" . $this::SQL_HOST . ";dbname=" . $this->db . ";port" . $this::SQL_PORT . ";charset=utf8mb4";
try {
$this->pdo = new \PDO($dsn, $user, $passwd, $options);
} catch (PDOException $e) {
$this->procException($e);
}
}
/*
* Change the current database being accessed
* @param string $name The name of the database to connect to.
* @return boolean Whether or not the database change succeeded.
*/
public function setDatabase($name): bool
{
$this->db = $name;
return ($this->query("USE ?", array($name))) ? true : false;
}
/*
* Process a query and get the PDOStatement object back
* @param string $sql The query to process. Use :paramname for named parameters and ? for anonymous parameters.
* @param array $args The parameters array, the one attached to execute()
* @return PDOStatement|boolean The PDOStatement object retreived from the database or false if something failed.
*/
public function query($sql, array $args = array()): PDOStatement
{
try {
if ($this->pdo !== null) {
if (($this->result = $this->pdo->prepare($sql)) !== false) {
if ($this->result->execute($args)) {
return $this->result;
}
}
}
return false;
} catch (PDOException $e) {
$this->procException($e);
}
}
/*
* Process exceptions based on the err setting
* @param PDOException $e The exception to process
* @throws PDOException If err is set to sql_handler::THROW_EXCEPTION
*/
private function procException(PDOException &$e): void
{
switch ($this->err) {
case self::INTERNAL_HANDLING:
self::handleException($e);
break;
case self::THROW_EXCEPTION:
throw $e;
break;
default:
break;
}
}
/*
* Handle a PDOException by showing the stacktrace properly and dieing.
* @param PDOException $e The exception to handle
*/
public static function handleException(PDOException &$e): void
{
$trace = $e->getTrace();
$msg = "<span class=\"error\"><strong>An error has occurred: </strong><br/>\n<pre>";
$msg .= $e->getMessage() . "<br/>\n";
foreach ($trace as $line) {
$msg .= "\t<strong>at</strong> ";
if (!empty($line['class'])) {
$msg .= $line['class'];
$msg .= $line['type'];
}
$msg .= $line['function'] . "()";
$path = $line['file'] . " (<strong>line</strong> " . $line['line'] . ")<br/>";
$msg .= " <strong>in</strong> " . str_replace($_SERVER['DOCUMENT_ROOT'], "", $path);
}
$msg .= "</pre></span>";
if (intval(ini_get('display_errors')) === 1) {
die($msg);
} else {
die();
}
}
}
/*
* Attribution
*
* https://phpdelusions.net/pdo/pdo_wrapper
* https://gist.github.com/Erackron/5786072
* https://github.com/infolock/DBHandler/blob/master/Handler.php
*/
/**
* vim: ft=php sts=4 sw=4 ts=4 et:
*/