class TemplateManager

class TemplateManager {
    
    /**
     * @var \Twig_Environment
     */
    protected $twig;
    
    /**
     * @var \Twig_Loader_Chain
     */
    protected $twigLoader;
    
    /**
     * @var array
     */
    protected $templates;
    
    /**
     * @var \Symfony\Component\HttpKernel\Profiler\Profiler
     */
    protected $profiler;
    
    /**
     * Constructor.
     *
     * @param SymfonyProfiler $profiler
     * @param \Twig_Environment $twig
     * @param \Twig_Loader_Chain $twigLoader
     * @param array $templates
     */
    public function __construct(SymfonyProfiler $profiler, \Twig_Environment $twig, \Twig_Loader_Chain $twigLoader, array $templates) {
        $this->profiler = $profiler;
        $this->twig = $twig;
        $this->twigLoader = $twigLoader;
        $this->templates = $templates;
    }
    
    /**
     * Gets the template name for a given panel.
     *
     * @param Profile $profile
     * @param string $panel
     *
     * @return mixed
     *
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     */
    public function getName(Profile $profile, $panel) {
        $templates = $this->getNames($profile);
        if (!isset($templates[$panel])) {
            throw new NotFoundHttpException(sprintf('Panel "%s" is not registered in profiler or is not present in viewed profile.', $panel));
        }
        return $templates[$panel];
    }
    
    /**
     * Gets the templates for a given profile.
     *
     * @param \Symfony\Component\HttpKernel\Profiler\Profile $profile
     *
     * @return array
     */
    public function getTemplates(Profile $profile) {
        $templates = $this->getNames($profile);
        foreach ($templates as $name => $template) {
            $templates[$name] = $this->twig
                ->loadTemplate($template);
        }
        return $templates;
    }
    
    /**
     * Gets template names of templates that are present in the viewed profile.
     *
     * @param \Symfony\Component\HttpKernel\Profiler\Profile $profile
     *
     * @return array
     *
     * @throws \UnexpectedValueException
     */
    protected function getNames(Profile $profile) {
        $templates = [];
        foreach ($this->templates as $arguments) {
            if (NULL === $arguments) {
                continue;
            }
            list($name, $template) = $arguments;
            if (!$this->profiler
                ->has($name) || !$profile->hasCollector($name)) {
                continue;
            }
            if ('.html.twig' === substr($template, -10)) {
                $template = substr($template, 0, -10);
            }
            if (!$this->twigLoader
                ->exists($template . '.html.twig')) {
                throw new \UnexpectedValueException(sprintf('The profiler template "%s.html.twig" for data collector "%s" does not exist.', $template, $name));
            }
            $templates[$name] = $template . '.html.twig';
        }
        return $templates;
    }

}