demo

Author: dg

app/FileLogger.php

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+<?php
+
+class FileLogger implements Logger
+{
+	private $file;
+
+	function __construct($file)
+	{
+		$this->file = $file;
+	}
+
+	function log($message)
+	{
+		file_put_contents($this->file, $message . "\n", FILE_APPEND);
+	}
+
+}

app/Logger.php

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+<?php
+
+interface Logger
+{
+
+	function log($message);
+
+}

app/Mail.php

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+<?php
+
+class Mail
+{
+	public $subject;
+	public $message;
+}

app/Mailer.php

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+<?php
+
+interface Mailer
+{
+
+	function send(Mail $mail, $to);
+
+}

app/NewsletterManager.php

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+<?php
+
+class NewsletterManager
+{
+	private $mailer;
+	private $logger;
+
+	function __construct(Mailer $mailer, Logger $logger)
+	{
+		$this->mailer = $mailer;
+		$this->logger = $logger;
+	}
+
+	function distribute(array $recipients)
+	{
+		$mail = new Mail;
+		// ...
+		foreach ($recipients as $recipient) {
+			$this->mailer->send($mail, $recipient);
+		}
+		$this->logger->log('...');
+	}
+
+}

app/SendMailMailer.php

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+<?php
+
+class SendMailMailer implements Mailer
+{
+
+	function send(Mail $mail, $to)
+	{
+		mail($to, $mail->subject, $mail->message);
+	}
+
+}

composer.json

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+{
+	"require": {
+		"nette/di": "~2.3"
+	},
+	"autoload": {
+		"classmap": ["app"]
+	}
+}

config.neon

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+services:
+	- FileLogger( log.txt )
+	- SendMailMailer
+	- NewsletterManager

example.php

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+<?php
+
+require __DIR__ . '/vendor/autoload.php';
+
+
+// create DI container
+$loader = new Nette\DI\ContainerLoader(__DIR__ . '/temp', TRUE);
+$class = $loader->load('', function($compiler) {
+    $compiler->loadConfig(__DIR__ . '/config.neon');
+});
+$container = new $class;
+
+
+// my application
+$manager = $container->getByType('NewsletterManager');
+$manager->distribute(['[email protected]']);