Created translator and used inside one of the commands

module/Common/src/Factory/TranslatorFactory.php

@@ -0,0 +1,30 @@
+<?php
+namespace Shlinkio\Shlink\Common\Factory;
+
+use Interop\Container\ContainerInterface;
+use Interop\Container\Exception\ContainerException;
+use Zend\I18n\Translator\Translator;
+use Zend\ServiceManager\Exception\ServiceNotCreatedException;
+use Zend\ServiceManager\Exception\ServiceNotFoundException;
+use Zend\ServiceManager\Factory\FactoryInterface;
+
+class TranslatorFactory implements FactoryInterface
+{
+    /**
+     * Create an object
+     *
+     * @param  ContainerInterface $container
+     * @param  string $requestedName
+     * @param  null|array $options
+     * @return object
+     * @throws ServiceNotFoundException if unable to resolve the service.
+     * @throws ServiceNotCreatedException if an exception is raised when
+     *     creating a service.
+     * @throws ContainerException if any other error occurs
+     */
+    public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
+    {
+        $config = $container->get('config');
+        return Translator::factory(isset($config['translator']) ? $config['translator'] : []);
+    }
+}

module/Common/src/Twig/Extension/TranslatorExtension.php

@@ -0,0 +1,75 @@
+<?php
+namespace Shlinkio\Shlink\Common\Twig\Extension;
+
+use Acelaya\ZsmAnnotatedServices\Annotation\Inject;
+use Zend\I18n\Translator\TranslatorInterface;
+
+class TranslatorExtension extends \Twig_Extension implements TranslatorInterface
+{
+    /**
+     * @var TranslatorInterface
+     */
+    private $translator;
+
+    /**
+     * TranslatorExtension constructor.
+     * @param TranslatorInterface $translator
+     *
+     * @Inject({"translator"})
+     */
+    public function __construct(TranslatorInterface $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName()
+    {
+        return __CLASS__;
+    }
+
+    public function getFunctions()
+    {
+        return [
+            new \Twig_SimpleFunction('translate', [$this, 'translate']),
+            new \Twig_SimpleFunction('translate_plural', [$this, 'translatePlural']),
+        ];
+    }
+
+    /**
+     * Translate a message.
+     *
+     * @param  string $message
+     * @param  string $textDomain
+     * @param  string $locale
+     * @return string
+     */
+    public function translate($message, $textDomain = 'default', $locale = null)
+    {
+        return $this->translator->translate($message, $textDomain, $locale);
+    }
+
+    /**
+     * Translate a plural message.
+     *
+     * @param  string $singular
+     * @param  string $plural
+     * @param  int $number
+     * @param  string $textDomain
+     * @param  string|null $locale
+     * @return string
+     */
+    public function translatePlural(
+        $singular,
+        $plural,
+        $number,
+        $textDomain = 'default',
+        $locale = null
+    ) {
+        $this->translator->translatePlural($singular, $plural, $number, $textDomain, $locale);
+    }
+}