Create an email service in Symfony

Question

I try to make a service in my Symfony Sonata bundle to send an email to a specific person as soon as an order is created. The person to whom the email is send is the person the user select to approve the order.

I try to follow the service container documentation on Symfony's website, but it feels too incomplete for me. I want to see a complete example and not just a few snippets.

This is my email service class so far;

<?php

namespace Qi\Bss\BaseBundle\Lib\PurchaseModule;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Security\Core\Authorization\AuthorizationChecker;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
use Doctrine\ORM\EntityManager;

/**
 * 
 */
class Notifier 
{
    /**
     * Service container
     * @var type 
     */
    private $serviceContainer;


    public function notifier($subject, $from, $to, $body) {
        $message = \Swift_Message::newInstance()
            ->setSubject($subject)
            ->setFrom($from)
            ->setTo($to)
            ->setBody($body)
        ;
        $this->serviceContainer->get('mailer')->send($message);
    }

    /**
     * Sets the sales order exporter object
     * @param type $serviceContainer
     */
    public function setServiceContainer($serviceContainer)
    {
        $this->serviceContainer = $serviceContainer;
    }
}

---

My service inside my services.yml file looks like this;

bss.pmod.order_notifier:
    class: Qi\Bss\BaseBundle\Lib\PurchaseModule\Notifier
    arguments: ["@mailer"]

---

And when I call the service in a controller action I use this line;

$this->get('bss.pmod.order_notifier')->notifier();

---

The error I'm getting state;

Notice: Undefined property: Qi\Bss\FrontendBundle\Controller\PmodOrderController::$serviceContainer

Like I said before, I've looked at the service container documentation but I can't understand it.

Can someone please help me with a nice full example explaining everything?

Answer 1

You don't need setServiceContainer method in your service class, instead of it you should have __construct accepting mailer as first argument:

class Notifier 
{
    protected $mailer;

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

    public function notifier() {
        $message = \Swift_Message::newInstance()
            ->setSubject('Simon Koning')
            ->setFrom('[email protected]')
            ->setTo('[email protected]')
            ->setBody('The quick brown fox jumps over the lazy dog.')
        ;
        $this->mailer->send($message);
    }
}