<?php

namespace Core;

use PDO;
use PDOException;

abstract class Model
{
    protected $db;

    public function __construct()
    {
        $this->db = $this->getConnection();
    }

    private function getConnection()
    {
        static $connection = null;

        if ($connection === null) {
            $dsn = 'mysql:host='.DB_HOST.';dbname='.DB_NAME.';charset=utf8';
            try {
                $connection = new PDO($dsn, DB_USER, DB_PASS);
                $connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            } catch (PDOException $e) {
                die('DB connection error: ' . $e->getMessage());
            }
        }
        return $connection;
    }
}