public function BackgroundImageCssController::buildCss in Background Image 2.0.x

Same name and namespace in other branches

1. 8 src/Controller/BackgroundImageCssController.php \Drupal\background_image\Controller\BackgroundImageCssController::buildCss()
2. 2.x src/Controller/BackgroundImageCssController.php \Drupal\background_image\Controller\BackgroundImageCssController::buildCss()

Generates the necessary CSS for a background image.

Parameters

\Drupal\background_image\BackgroundImageInterface $background_image: A background image entity.

string $uri: The URI path on where to store the generated CSS.

Return value

bool TRUE or FALSE

1 call to BackgroundImageCssController::buildCss()

BackgroundImageCssController::deliver in src/Controller/BackgroundImageCssController.php

Generates a background CSS file.

File

src/Controller/BackgroundImageCssController.php, line 145

Class

BackgroundImageCssController

Defines a controller to serve image styles.

Namespace

Drupal\background_image\Controller

Code

public function buildCss(BackgroundImageInterface $background_image, $uri) {

  // Immediately return if there is is no image file.
  if (!$background_image
    ->getImageFile()) {
    $this->logger
      ->error('Background image does not have a valid image file: background_image:@id', [
      '@id' => $background_image
        ->id(),
    ]);
    return FALSE;
  }

  // Build the destination folder tree if it doesn't already exist.
  $directory = $this->fileSystem
    ->dirname($uri);
  if (!$this->fileSystem
    ->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS)) {
    $this->logger
      ->error('Failed to create background image directory: %directory', [
      '%directory' => $directory,
    ]);
    return FALSE;
  }
  $variables = [
    'base_class' => $this->backgroundImageManager
      ->getBaseClass(),
    'background_image_class' => $background_image
      ->getCssClass(),
    'settings' => $background_image
      ->getSettings()
      ->get(),
    'preload_url' => $background_image
      ->getImageUrl($this->backgroundImageManager
      ->getPreloadImageStyle()),
    'fallback_url' => $background_image
      ->getImageUrl($this->backgroundImageManager
      ->getFallbackImageStyle()),
    'media_queries' => $this
      ->buildMediaQueries($background_image),
  ];
  $cssTemplate = $this
    ->getCssTemplate();
  $this
    ->moduleHandler()
    ->alter('background_image_css_template', $variables, $cssTemplate, $background_image);
  $this->themeManager
    ->alter('background_image_css_template', $variables, $cssTemplate, $background_image);

  // Render the template.
  try {
    $data = $this->twig
      ->loadTemplate($cssTemplate)
      ->render($variables);

    // Minify the CSS if necessary.
    if (preg_match('/\\.min\\.css$/', $uri) && ($css_minifier = $this->backgroundImageManager
      ->getCssMinifier())) {
      $data = $css_minifier
        ->optimize($data, [], []);
      $css_minifier
        ->addLicense($data, preg_replace('/\\.min\\.css$/', '.css', file_create_url($uri)));
    }
    if (!$this
      ->dump($data, $uri)) {
      return FALSE;
    }
  } catch (\Exception $e) {
    $previous_exception = $e
      ->getPrevious();
    $this->logger
      ->error($previous_exception ? $previous_exception
      ->getMessage() : $e
      ->getMessage());
    return FALSE;
  }
  return TRUE;
}