WEBVTT NOTE Created by CaptionSync from Automatic Sync Technologies www.automaticsync.com 00:00:01.056 --> 00:00:06.246 align:middle I bet that most, if not every email your app sends will be from the same email address, 00:00:06.596 --> 00:00:10.166 align:middle something clever like hal9000@universal-travel.com 00:00:10.576 --> 00:00:14.666 align:middle or the tried-and-true but sleepier info@universal-travel.com. 00:00:15.326 --> 00:00:17.926 align:middle Because every email will have the same from address, 00:00:18.056 --> 00:00:20.046 align:middle there's no point to set it in every email. 00:00:20.386 --> 00:00:22.036 align:middle Instead, let's set it globally. 00:00:22.676 --> 00:00:25.466 align:middle Oddly, there isn't any tiny config option for this. 00:00:25.716 --> 00:00:29.166 align:middle But that's great for us: it gives us a chance to learn about events! 00:00:29.456 --> 00:00:31.366 align:middle Very powerful, very nerdy. 00:00:31.916 --> 00:00:35.406 align:middle Before an email is sent, Mailer dispatches a MessageEvent. 00:00:35.816 --> 00:00:38.286 align:middle To listen to this, find your terminal and run: 00:00:38.286 --> 00:00:43.936 align:middle symfony console make:listener Call it GlobalFromEmailListener. 00:00:44.686 --> 00:00:46.866 align:middle The gives us a list of events we can listen to. 00:00:47.296 --> 00:00:49.386 align:middle We want the first one: MessageEvent. 00:00:49.386 --> 00:00:53.006 align:middle Start typing Symfony and it's autocompleted for us. 00:00:53.386 --> 00:00:53.936 align:middle Hit enter. 00:00:54.586 --> 00:00:55.776 align:middle Listener created! 00:00:56.236 --> 00:01:00.276 align:middle To be extra cool, let's set our global from address as a parameter. 00:01:00.806 --> 00:01:06.536 align:middle In config/services.yaml, under parameters, add a new one: global_from_email. 00:01:07.156 --> 00:01:13.276 align:middle This will be a string, but check this out: set it to Universal Travel , then in angle brackets, 00:01:13.276 --> 00:01:19.376 align:middle put the email: <info@universal-travel.com>: When Symfony Mailer sees a string that looks 00:01:19.376 --> 00:01:23.546 align:middle like this as an email address, it'll create the proper Address object 00:01:23.596 --> 00:01:25.476 align:middle with both a name and email set. 00:01:25.726 --> 00:01:33.486 align:middle Sweet! Open the new class src/EventListener/GlobalFromEmailListener.php. 00:01:33.486 --> 00:01:43.316 align:middle Add a constructor with a private string $fromEmail argument and an #[Autowire] attribute 00:01:43.316 --> 00:01:48.696 align:middle with our parameter name: %global_from_email%: Down here, 00:01:48.876 --> 00:01:53.076 align:middle the #[AsEventListener] attribute is what marks this method as an event listener. 00:01:53.616 --> 00:01:55.666 align:middle We can actually remove this event argument - 00:01:55.856 --> 00:02:00.736 align:middle it'll be inferred from the method argument's type-hint: MessageEvent: Inside, 00:02:00.736 --> 00:02:05.636 align:middle first grab the message from the event: $message = $event->getMessage(): 00:02:06.416 --> 00:02:09.196 align:middle Jump into the getMessage() method to see what it returns. 00:02:09.756 --> 00:02:11.086 align:middle RawMessage... 00:02:11.456 --> 00:02:13.786 align:middle jump into this and look at what classes extend it. 00:02:15.416 --> 00:02:16.396 align:middle TemplatedEmail! 00:02:16.616 --> 00:02:24.266 align:middle Perfect! Back in our listener, write if (!$message instanceof TemplatedEmail), 00:02:24.716 --> 00:02:28.486 align:middle and inside, return;: This will likely never be the case, 00:02:28.586 --> 00:02:30.296 align:middle but it's good practice to double-check. 00:02:30.676 --> 00:02:34.806 align:middle Plus, it helps our IDE know that $message is a TemplatedEmail now. 00:02:35.426 --> 00:02:39.046 align:middle It's possible that an email might still set its own from address. 00:02:39.416 --> 00:02:41.306 align:middle In this case, we don't want to override it. 00:02:41.306 --> 00:02:47.956 align:middle So, add a guard clause: if ($message->getFrom()), return;: Now, 00:02:47.956 --> 00:02:54.706 align:middle we can set the global from: $message->from($this->fromEmail): Perfect! 00:02:55.476 --> 00:02:59.136 align:middle Back in TripController::show(), remove the ->from() for the email. 00:02:59.926 --> 00:03:00.996 align:middle Time to test this! 00:03:01.256 --> 00:03:04.346 align:middle In our app, book a trip and check Mailtrap for the email. 00:03:09.766 --> 00:03:10.596 align:middle Drumroll... 00:03:11.286 --> 00:03:12.666 align:middle the from is set correctly! 00:03:12.856 --> 00:03:14.016 align:middle Our listener works! 00:03:14.276 --> 00:03:15.956 align:middle I never doubted us. 00:03:15.956 --> 00:03:19.686 align:middle One more detail to make this completely airtight (like most of our ships). 00:03:20.226 --> 00:03:24.726 align:middle Imagine a contact form where the user fills their name, email, and a message. 00:03:25.076 --> 00:03:28.096 align:middle This fires off an email with these details to your support team. 00:03:28.646 --> 00:03:33.006 align:middle In their email clients, it'd be nice if, when they hit reply, it goes to the email 00:03:33.006 --> 00:03:35.236 align:middle from the form - not your "global from". 00:03:35.926 --> 00:03:39.206 align:middle You might think that you should set the from address to the user's email. 00:03:39.516 --> 00:03:44.186 align:middle But that won't work, as we're not authorized to send emails on behalf of that user. 00:03:44.696 --> 00:03:46.246 align:middle More on email security soon. 00:03:46.246 --> 00:03:51.766 align:middle Fortunately, there's a special email header called Reply-To for just this scenario. 00:03:52.186 --> 00:03:57.566 align:middle When building your email, set it with ->replyTo() and pass the user's email address. 00:03:57.566 --> 00:04:01.506 align:middle Strap in because the booster tanks are full and ready for launch! 00:04:01.836 --> 00:04:04.266 align:middle Time to send real emails in production! 00:04:04.616 --> 00:04:05.256 align:middle That's next.