<?php

class Database
{
	private static $instance = null;
	private $sql_connection;

	private function __construct()
	{
		$config = parse_ini_file('config.ini', true)['mysql_credentials'];

		$db_server = $config['server'];
		$db_user = $config['user'];
		$db_pass = $config['password'];
		$db_database = $config['database'];

		$this->sql_connection = mysqli_connect($db_server, $db_user, $db_pass, $db_database);

		if (!$this->sql_connection) {
			trigger_error("Database connection error: " . mysqli_connect_error());
		}
	}

	public static function get(): ?Database
	{
		if (self::$instance == null) {
			self::$instance = new Database();
		}

		return self::$instance;
	}

	public function query(string $sql)
	{
		mysqli_query($this->sql_connection, $sql);
	}
}