SmtpMailAdapter.php

<?php

declare(strict_types=1);

namespace Sendportal\Base\Adapters;

use Swift_Mailer;
use Swift_Message;
use Swift_SmtpTransport;
use Swift_TransportException;

use Illuminate\Support\Arr;
use Sendportal\Base\Services\Messages\MessageTrackingOptions;

class SmtpMailAdapter extends BaseMailAdapter
{
    /** @var Mailer */
    protected $client;
    
     /** @var SmtpTransport */
    protected $transport;
    
    public function send(string $fromEmail, string $fromName, string $toEmail, string $subject, MessageTrackingOptions $trackingOptions, string $content): string
    {
        $failedRecipients = [];
		  
		  try{
		  	
        	$result = $this->resolveClient()->send($this->resolveMessage( $subject,  $content, $fromEmail,  $fromName,  $toEmail), $failedRecipients);
		  }
		  catch(Swift_TransportException $e){
		  	return $this->resolveMessageId(0);
		  }
		  
        return $this->resolveMessageId($result);
    }

    protected function resolveClient(): Swift_Mailer
    {
        if ($this->client) {
            return $this->client;
        }

        $this->client = new Swift_Mailer($this->resolveTransport());

        return $this->client;
    }
    
    protected function resolveTransport(): Swift_SmtpTransport
    {
    	  if ($this->transport) {
            return $this->transport;
        }
        
        $this->transport = new Swift_SmtpTransport(
         		Arr::get($this->config, 'domain'),
         		Arr::get($this->config, 'port'),
					Arr::get($this->config, 'encryption')
         );
         
         $this->transport->setUsername(Arr::get($this->config, 'username'));
         $this->transport->setPassword(Arr::get($this->config, 'password'));
         $this->transport->setAuthMode('login');
         
         return $this->transport;
    }
    
    protected function resolveMessage(string $subject, string $content,string $fromEmail, string $fromName, string $toEmail): Swift_Message
    {
    	$msg =  new Swift_Message($subject,$content,'text/html');
    	
    	$msg->setTo($toEmail);
    	$msg->setFrom($fromEmail);
    	
    	return $msg;
    }

    protected function resolveMessageId($result): string
    {
        return ($result == 1) ? strval($result) : '-1';
    }
}