bug #125 Fix #124: Symfony 3 : The helper "dialog" is not defined (Anthony ARNAUD)

This PR was squashed before being merged into the 2.3-dev branch (closes #125).

Discussion
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Fix #124: Symfony 3 : The helper "dialog" is not defined

Commits
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4f6a432 Fix #124: Symfony 3 : The helper "dialog" is not defined

Author: fabpot

Command/NewEmailCommand.php

@@ -15,6 +15,9 @@
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Helper\DialogHelper;
+use Symfony\Component\Console\Helper\QuestionHelper;
+use Symfony\Component\Console\Question\Question;
 
 /**
  * A console command for creating and sending simple emails
@@ -85,12 +88,19 @@ protected function execute(InputInterface $input, OutputInterface $output)
      */
     protected function interact(InputInterface $input, OutputInterface $output)
     {
-        $dialog = $this->getHelper('dialog');
+        // Symfony <2.5 BC
+        /** @var QuestionHelper|DialogHelper $questionHelper */
+        $questionHelper = $this->getHelperSet()->has('question') ? $this->getHelperSet()->get('question') : $this->getHelperSet()->get('dialog');
+
         foreach ($input->getOptions() as $option => $value) {
             if ($value === null) {
-                $input->setOption($option, $dialog->ask($output,
-                    sprintf('<question>%s</question>: ', ucfirst($option))
-                ));
+                // Symfony <2.5 BC
+                if ($questionHelper instanceof QuestionHelper) {
+                    $question = new Question(sprintf('<question>%s</question>: ', ucfirst($option)));
+                } else {
+                    $question = sprintf('<question>%s</question>: ', ucfirst($option));
+                }
+                $input->setOption($option, $questionHelper->ask($input, $output, $question));
             }
         }
     }