Silex traits for swiftmailer. Fatal error: Call to undefined method Silex\Application::mail() - swiftmailer

Question

I am trying to use traits in Silex for Swift mailer.
I have included:
use Silex\Application\SwiftmailerTrait;
I also checked that traits file were in the right Silex vendor directory.
Test traits:
$app->mail(\Swift_Message::newInstance()
->setSubject("title")
->setFrom(["www.domain.com"]])
->setTo(["something#domain.com"])
->setReplyTo(["user.email#some.com"])
->setBody("TEST MESSAGE")
);
Then, I get this error message:
Fatal error: Call to undefined method Silex\Application::mail() in
...\app.php on line 88
Just to make it clear. I can, without any issue, use standard way of using swift in Silex and it works just fine.
This is the working bit without traits:
// $message = \Swift_Message::newInstance()
// ->setSubject('[YourSite] Feedback')
// ->setFrom(array('noreply#yoursite.com'))
// ->setTo(array('feedback#yoursite.com'))
// ->setBody($request->get('message'));
// $app['mailer']->send($message);
However I was wondering what was actually stopping Silex from running swift with traits. Any idea ?
I am using PHP Version 5.6.11
My composer file:
{
"require": {
"components/jquery": "^2.2",
"components/css-reset": "^2.5",
"silex/silex": "~1.2",
"symfony/browser-kit": "~2.3",
"symfony/console": "~2.3",
"symfony/config": "~2.3",
"symfony/css-selector": "~2.3",
"symfony/dom-crawler": "~2.3",
"symfony/filesystem": "~2.3",
"symfony/finder": "~2.3",
"symfony/form": "~2.3",
"symfony/locale": "~2.3",
"symfony/process": "~2.3",
"symfony/security": "~2.3",
"symfony/serializer": "~2.3",
"symfony/translation": "~2.3",
"symfony/validator": "~2.3",
"symfony/monolog-bridge": "~2.3",
"symfony/twig-bridge": "~2.3",
"doctrine/dbal": ">=2.2.0,<2.4.0-dev",
"swiftmailer/swiftmailer": "5.*",
"twig/twig": "^1.24",
"symfony/security-csrf": "~2.3",
"symfony/yaml": "~2.3"
},
"autoload": {
"psr-4": {
"WL\\Form\\": "WL/Form/",
"WL\\Email\\": "WL/Email/"
},
"classmap":[],
"files":[]
}
}

Answer 1

You need to create a custom Application class which extends \Silex\Application and uses that trait.
Assuming a base project tree as:
project/
|
|_app/
|
|_src/
|
|_vendor/
|
|_web/
You need a class definition:
// src/WL/App.php
namespace WL;
class App extends \Silex\Application
{
use \Silex\Application\SwiftmailerTrait;
// add some other trait
// even custom methods or traits
}
A bootstrap :
// app/bootstrap.php
$app = new \WL\App();
// configure it, register controllers and services, ...
// or import them
foreach (glob(__DIR__ . "/../src/WL/Controller/*.php") as $controllers_provider) {
include_once $controllers_provider;
}
return $app;
So you can import a controller collection like :
// src/Wl/Controller/blog.php
use Symfony\Component\HttpFoundation\Request;
/** #var \Silex\ControllerCollection $blog */
$blog = $app['controllers_factory'];
// define some routes
$blog->post('/send-mail', function (Request $request, \WL\App $app)
{
// Now this application passed to your controller is an
// instance of custom \App which has the trait you want
// in contrary with the default \Silex\Application
$app->mail(...
}
$app->mount('/blog', $blog);
And a front controller :
// web/index.php
// define autoloading
// customize debug and server parameters
$app = require_once '../app/bootstrap.php';
$app->run();