public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php echo strtolower(strrev('!emosewaP yltcefrruP erA steP ruO')); ?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$waggyPig = array(
    'name' => 'Waggy Pig',
    'weight' => 10,
    'age' => 7,
    'bio' => 'Sleepy white fluffy dog'
);
\$waggyPig['breed'] = 'bichon';
?>

<h2><?php echo \$waggyPig['name']; ?></h2>
<div class="age"><?php echo \$waggyPig['age']; ?></div>
<div class="weight"><?php echo \$waggyPig['weight']; ?></div>
<div class="breed">
    <?php echo \$waggyPig['breed']; ?>
</div>
<p>
    <?php echo \$waggyPig['bio']; ?>
</p>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<h2><?php echo 'i luv puppies'; ?></h2>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('new_toy.php', <<<EOF
<h3>
    <?php echo \$_SERVER['HTTP_USER_AGENT']; ?>
</h3>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<h2>
    <?php echo \$whatILove; ?>
</h2>
EOF
);
        return $correctAnswer;
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('homepage.twig', <<<EOF
<h2>
    {{ whatIWantForXmas }}
</h2>
EOF
);
        return $correctAnswer;
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('aboutUs.php', <<<EOF
<?php
// this is extra credit: a 301 redirect is good for search engines in this case!
http_response_code(301);

header('Location: /about.php');
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php \$airpupTag = 'I luv kittens'; ?>

<h2>
    <?php echo \$airpupTag; ?>
</h2>
EOF
);
        return $correctAnswer;
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<!-- create the variable here -->
<?php \$airpupTag = 'I luv kittens'; ?>

<h2>
    <?php echo \$airpupTag; ?>
</h2>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('new_toy.php', <<<EOF
<form action="/new_toy.php" method="POST">
    <input type="text" name="toy_name" />
    <textarea name="description"></textarea>

    <button type="submit">Add toy</button>
</form>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$walker1 = 'Kitty';
\$walker2 = 'Tiger';
\$walker3 = 'Jay';

\$dogWalkers = array(\$walker1, \$walker2, \$walker3);
?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
    file_put_contents('doglife.txt', 'Dogs rule!');
?>

<h2>
    <?php echo file_get_contents('doglife.txt'); ?>
</h2>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$airpupTag = 'I luv kittens';
\$yearFounded = 2015;
?>

<h2>
    <?php echo \$airpupTag; ?> (founded <?php echo \$yearFounded; ?>)
</h2>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$contents = file_get_contents('toys.json');
\$toys = json_decode(\$contents, true);
?>

<?php foreach (\$toys as \$toy) { ?>
    <h3><?php echo \$toy['name']; ?></h3>
    <h4><?php echo \$toy['toy_color']; ?></h4>
<?php } ?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$contents = file_get_contents('toys.json');
\$toys = json_decode(\$contents, true);
?>

<?php foreach (\$toys as \$toy) { ?>
    <h3><?php echo \$toy['name']; ?></h3>
    <h4>
        <?php
        if (array_key_exists('color', \$toy) && \$toy['color'] == 'multiple') {
            echo 'Multiple Colors';
        } elseif (!array_key_exists('color', \$toy)) {
            echo 'no color';
        } else {
            echo \$toy['color'];
        }
        ?>
    </h4>
<?php } ?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
require 'lib/functions.php';

\$toys = get_great_pet_toys();
?>

<?php foreach (\$toys as \$toy) { ?>
    <h3><?php echo \$toy['name']; ?></h3>
    <h4><?php echo \$toy['color']; ?></h4>
<?php } ?>
EOF
);
        $correctAnswer->setFileContents('lib/functions.php', <<<EOF
<?php
function get_great_pet_toys()
{
    \$contents = file_get_contents('toys.json');
    \$toys = json_decode(\$contents, true);

    return \$toys;
}

EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$pets = array(
    array('name' => 'Pico de Gato', 'bio' => 'Spicy kitty'),
);
\$pets[] = array('name' => 'Waggy Pig', 'bio' => 'Little white dog');
\$pets[] = array('name' => 'Pancake', 'bio' => 'Breakfast is my favorite!');
?>

<h1>
    <?php echo \$pets[2]['bio']; ?>
</h1>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$toys = array();
\$toys[] = array('name' => 'Bacon Bone', 'color' => 'Bacon-colored');
\$toys[] = array('name' => 'Tennis Ball', 'color' => 'Yellow');
\$toys[] = array('name' => 'Frisbee', 'color' => 'Red');
?>

<h4>
    <!-- replace the XXXX with the real number of toys using count -->
    Selling <?php echo count(\$toys); ?> Toys
</h4>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$toys = array();
\$toys[] = array('name' => 'Bacon Bone', 'color' => 'Bacon-colored');
\$toys[] = array('name' => 'Tennis Ball', 'color' => 'Yellow');
\$toys[] = array('name' => 'Frisbee', 'color' => 'Red');
?>

<?php foreach (\$toys as \$toy) { ?>
    <h3><?php echo \$toy['name']; ?></h3>
    <h4><?php echo \$toy['color']; ?></h4>
<?php } ?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$walker1 = 'Kitty';
\$walker2 = 'Tiger';
\$walker3 = 'Jay';

\$dogWalkers = array(\$walker1, \$walker2, \$walker3);
foreach (\$dogWalkers as \$dogWalker) {
    echo '<h3>';
    echo \$dogWalker;
    echo '<button>Schedule me</button>';
    echo '</h3>';
}
?>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
\$airpupTag = 'I luv puppies';
?>

<h2><?php echo \$airpupTag; ?></h2>

<h3>
    <span>
        <?php echo rand(100, 200); ?>
    </span>

    pets waiting to meet you
</h3>
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('new_toy.php', <<<EOF
<?php
if (\$_SERVER['REQUEST_METHOD'] == 'POST') {
    \$name = \$_POST['name'];
    \$description = \$_POST['description'];

    var_dump(\$name, \$description);
}
?>

<form action="/new_toy.php" method="POST">
    <input type="text" name="toy_name" />
    <textarea name="description"></textarea>

    <button type="submit">Add toy</button>
</form>
EOF
);
    }
 public function renderActivityAction(Request $request, Application $app)
 {
     $path = $request->query->get('path');
     if (!$path) {
         throw new NotFoundHttpException('Missing path!');
     }
     $challenge = $this->createChallengeFromPath($path);
     $fileBuilder = $challenge->getFileBuilder();
     $correctAnswer = Activity\CodingChallenge\CorrectAnswer::createFromFileBuilder($fileBuilder);
     $challenge->configureCorrectAnswer($correctAnswer);
     $html = $this->getTwig($app)->render('author/renderActivity.twig', array('challenge' => $challenge, 'fileBuilder' => $fileBuilder, 'path' => $path, 'gradingUrl' => $app['url_generator']->generate('grade_activity'), 'correctAnswer' => $correctAnswer, 'activityUrl' => $app['url_generator']->generate('render_activity'), 'otherFiles' => $this->findOtherFiles($path)));
     return new Response($html);
 }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('aboutUs.php', <<<EOF
<?php require 'layout/header.php'; ?>

<h1>About Us</h1>

<p>
We're just a couple of <mark>crazy</mark> cats with a dog-gone good idea!
</p>

<address>
  <strong>AirpupNMeow</strong><br>
  555 Main Street<br>
  San Francisco, CA 94107<br>
  <abbr title="Phone">P:</abbr> (123) 456-7890
</address>

<?php require 'layout/footer.php'; ?>
EOF
);
        $correctAnswer->setFileContents('index.php', <<<EOF
<?php
    require 'layout/header.php';

    \$airpupTagLine = 'We luv puppies!';
?>

<h1>Welcome to AirPupNMeow.com!</h1>
<h3><?php echo \$airpupTagLine; ?></h3>

<?php require 'layout/footer.php'; ?>
EOF
);
        $correctAnswer->setFileContents('layout/header.php', <<<EOF
<!-- HEADER CODE STARTS HERE -->
<html>
<head>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" />
</head>
<body>
    <div class="container">
<!-- HEADER CODE ENDS HERE -->
EOF
);
        $correctAnswer->setFileContents('layout/footer.php', <<<EOF
<!-- FOOTER CODE STARTS HERE -->
\t<footer>
        &copy; 2015 AirPupNMeow.com
\t</footer>
\t</div>
</body>
</html>
<!-- FOOTER CODE STARTS HERE -->
EOF
);
    }
    public function configureCorrectAnswer(CorrectAnswer $correctAnswer)
    {
        $correctAnswer->setFileContents('new_toy.php', <<<EOF
<?php
require 'functions.php';

\$name = \$_POST['name'];
\$description = \$_POST['description'];

\$toys = get_great_pet_toys();
\$toys[] = array('name' => \$name, 'description' => \$description);
save_toys(\$toys);
?>

<form action="/new_toy.php" method="POST">
    <input type="text" name="toy_name" />
    <textarea name="description"></textarea>

    <button type="submit">Add toy</button>
</form>
EOF
);
        $correctAnswer->setFileContents('functions.php', <<<EOF
<?php
function get_great_pet_toys()
{
    \$contents = file_get_contents('toys.json');
    \$toys = json_decode(\$contents, true);

    return \$toys;
}

function save_toys(\$toys)
{
    \$json = json_encode(\$toys, JSON_PRETTY_PRINT);
    file_put_contents('toys.json', \$json);
}
EOF
);
    }