Mail class

<?php
namespace App;

class Mail
{
    protected $mysqli;
    protected $mailer;

    protected $config = [];
    protected $admin = false;
    protected $casamadre = 0;
    protected $licenziatario = 0;

    protected $success = [];
    protected $to = [];

    public function __construct($mysqli)
    {
        $this->mysqli = $mysqli;
        $this->config = config('mail');

        $this->mailer = $this->mailConnection();
        $this->setFrom($this->config["from-mail"],$this->config["from-name"]);

        return $this;
    }
    public function admin($param = true)
    {
        $this->admin = $param;

        return $this;
    }
    public function casamadre($param = 0)
    {
        $this->casamadre = $param;

        return $this;
    }
    public function licenziatario($param = 0)
    {
        $this->licenziatario = $param;

        return $this;
    }
    public function send()
    {
        if(! $this->admin && $this->bloccoAdmin())
        {
            return true;
        }

        while(!empty($this->to))
        {
            $recipient = array_pop($this->to);

            $this->mailer->clearAllRecipients();
            $this->mailer->addAddress($recipient['mail'], $recipient['name']);

            if(config('app')['debug'])
            {
                $this->mailer->preSend();
                file_put_contents("log/mail/" . date("Y-m-d") . ".log", $this->mailer->getSentMIMEMessage(), FILE_APPEND);

                array_push($this->success, array("mail" => $recipient['mail'], "name" => $recipient['name']));
            }
            elseif($this->mailer->send())
            {
                array_push($this->success, array("mail" => $recipient['mail'], "name" => $recipient['name']));
            }
        }

        $this->log();

        return true;
    }
    public function setFrom($mail, $name = null)
    {
        $this->mailer->From = $mail;
        if($name)
        {
            $this->mailer->FromName = $name;
        }
    }
    public function setTo($mail, $name = '')
    {
        if(func_num_args() == 1 && is_array($mail))
        {
            foreach ($mail as $index => $row)
            {
                $this->setTo($row['mail'], $row['name'] ?? '');
            }

            return $this;
        }

        array_push($this->to, ["mail" => $mail, "name" => $name]);

        return $this;
    }
    public function setAttachment($path, $name = '')
    {
        if(func_num_args() == 1 && is_array($path))
        {
            foreach($path as $index => $row)
            {
                $this->setAttachment($row['path'], $row['name'] ?? '');
            }

            return $this;
        }

        $this->mailer->addAttachment($path, $name);

        return $this;
    }
    public function setSubject($string)
    {
        $this->mailer->Subject = $string;

        return $this;
    }
    public function setBody($string)
    {
        $this->mailer->msgHTML($string);

        return $this;
    }
    protected function mailConnection()
    {
        $mailer = new \PHPMailer;
        $mailer->isSMTP();
        $mailer->Host = $this->config['host'];
        $mailer->SMTPAuth = true;
        $mailer->Username = $this->config['username'];
        $mailer->Password = $this->config['password'];
        $mailer->SMTPSecure = $this->config['method'];
        $mailer->Port = $this->config['port'];

        $mailer->CharSet = 'UTF-8';
        $mailer->isHTML(true);

        return $mailer;
    }
    protected function bloccoAdmin()
    {
        $q = "SELECT flag FROM impostazioni WHERE id_impostazione = 18";
        $e = $this->mysqli->query($q);
        $r = $e->fetch_assoc();

        return $r['flag'] == 1;
    }
    protected function log()
    {
        if(count($this->success) > 0)
        {
            $oggetto = $this->mysqli->real_escape_string($this->mailer->Subject);
            $testo = $this->mysqli->real_escape_string($this->mailer->Body);

                # CREO LA TESTATA
            $sql = "INSERT INTO storico_mail (oggetto,testo,id_casa_madre,id_licenziatario)
                    VALUES ('$oggetto','$testo','$this->casamadre','$this->licenziatario') ";
            $this->mysqli->query($sql);
            $id_testata = $this->mysqli->insert_id;

            $stmt = $this->mysqli->prepare("INSERT INTO storico_mail_indirizzi (id_storico_mail,email,nome) VALUES (?,?,?)");
            $stmt->bind_param("iss", $id_testata, $address, $alias);

            foreach ($this->success as $index => $row)
            {
                $alias = (isset($row['name']))? $this->mysqli->real_escape_string($row['name']) : '';
                $address = $row['mail'];

                $stmt->execute();
            }

            $allegati = $this->mailer->getAttachments();
            if(!empty($allegati))
            {
                $stmt = $this->mysqli->prepare("INSERT INTO storico_mail_allegati (id_storico_mail,nome_file,nome_utente) VALUES (?,?,?)");
                $stmt->bind_param("iss", $id_testata, $filename, $alias);

                foreach ($allegati as $index => $row)
                {
                    $alias = $this->mysqli->real_escape_string($row[2]);
                    $filename = $row[1];

                    $stmt->execute();

                    $id_allegato = $stmt->insert_id;

                    $estensione = trovaEstensione($row[0]);
                    $nuovonome = creaHash();
                    $nuovonome = $id_allegato."_".$nuovonome.".".$estensione;

                    copy($row[0], __DIR__ . "/../media/storico_mail_allegati/".$nuovonome);

                    $sql = "UPDATE storico_mail_allegati SET nome_file = '$nuovonome' WHERE id = '$id_allegato' ";
                    $this->mysqli->query($sql);
                }
            }
        }
    }
}

?>