eliminazione file superflui, spostamento file read.php all'interno del progetto, aggiunta astrazione classe Qrcode, miglioramento download bulk, refactoring generale

Signed-off-by: giandonato.inverso@edempg.it <giandonato.inverso@studenti.unimi.it>

src/config/config.php

@@ -0,0 +1,35 @@
+<?php
+//Note: This file should be included first in every php page.
+require_once ('environment.php');
+
+error_reporting(E_ALL);
+ini_set('display_errors', 'On');
+define('BASE_PATH', dirname(dirname(__FILE__)));
+define('CURRENT_PAGE', basename($_SERVER['REQUEST_URI']));
+
+require_once BASE_PATH . '/lib/MysqliDb/MysqliDb.php';
+require_once BASE_PATH . '/helpers/helpers.php';
+
+/* SAVED QR CODES */
+//You can change the folder where the qr code will be saved
+define('SAVED_QRCODE_FOLDER', './saved_qrcode/');
+define('SAVED_QRCODE_DIRECTORY', BASE_PATH.'/saved_qrcode/');
+define('SAVED_QRCODE_URL', base_url().'/saved_qrcode/');
+
+//You can change the page name for the redirect and the search parameter (the default is "id")
+define('READ_PATH', base_url().'/read.php?id=');
+
+
+/**
+ * Get instance of DB object
+ */
+function getDbInstance() {
+    return new MysqliDb (Array (
+        'host' => DATABASE_HOST,
+        'username' => DATABASE_USER,
+        'password' => DATABASE_PASSWORD,
+        'db'=> DATABASE_NAME,
+        'port' => DATABASE_PORT,
+        'prefix' => DATABASE_PREFIX,
+        'charset' => DATABASE_CHARSET));
+}