function HtmlResponseAttachmentsProcessor::processAssetLibraries

File

src/Render/HtmlResponseAttachmentsProcessor.php, line 31

Class

HtmlResponseAttachmentsProcessor

Processes attachments of HTML responses.

Namespace

Drupal\advagg\Render

Code

protected function processAssetLibraries(AttachedAssetsInterface $assets, array $placeholders) {
    $variables = [
        'prefetch' => [],
    ];
    $render_type = 'html';
    // Print styles - if present.
    if (isset($placeholders['styles'])) {
        // Optimize CSS if necessary, but only during normal site operation.
        $optimize_css = !defined('MAINTENANCE_MODE') && $this->config
            ->get('css.preprocess');
        $variables['styles'] = $this->cssCollectionRenderer
            ->render($this->assetResolver
            ->getCssAssets($assets, $optimize_css));
        $variables['prefetch'] = isset($variables['styles']['prefetch']) ? $variables['styles']['prefetch'] : [];
        unset($variables['styles']['prefetch']);
        // Allow other modules to alter the assets before rendering.
        // Call hook_advagg_asset_render_alter().
        $asset_type = 'styles';
        $this->moduleHandler
            ->alter('advagg_asset_render', $variables['styles'], $render_type, $asset_type);
    }
    // Print scripts - if any are present.
    if (isset($placeholders['scripts']) || isset($placeholders['scripts_bottom'])) {
        // Optimize JS if necessary, but only during normal site operation.
        $optimize_js = !defined('MAINTENANCE_MODE') && !\Drupal::state()->get('system.maintenance_mode') && $this->config
            ->get('js.preprocess');
        list($js_assets_header, $js_assets_footer) = $this->assetResolver
            ->getJsAssets($assets, $optimize_js);
        $variables['scripts'] = $this->jsCollectionRenderer
            ->render($js_assets_header);
        $variables['prefetch'] += isset($variables['scripts']['prefetch']) ? $variables['scripts']['prefetch'] : [];
        unset($variables['scripts']['prefetch']);
        // Allow other modules to alter the assets before rendering.
        // Call hook_advagg_asset_render_alter().
        $asset_type = 'scripts';
        $this->moduleHandler
            ->alter('advagg_asset_render', $variables['scripts'], $render_type, $asset_type);
        $variables['scripts_bottom'] = $this->jsCollectionRenderer
            ->render($js_assets_footer);
        $variables['prefetch'] += isset($variables['scripts_bottom']['prefetch']) ? $variables['scripts_bottom']['prefetch'] : [];
        unset($variables['scripts_bottom']['prefetch']);
        // Allow other modules to alter the assets before rendering.
        // Call hook_advagg_asset_render_alter().
        $asset_type = 'scripts_bottom';
        $this->moduleHandler
            ->alter('advagg_asset_render', $variables['scripts_bottom'], $render_type, $asset_type);
    }
    // Merge prefetch and styles or scripts.
    $prefetch = array_unique($variables['prefetch'], SORT_REGULAR);
    // Allow other modules to alter the assets before rendering.
    // Call hook_advagg_asset_render_alter().
    $asset_type = 'prefetch';
    $this->moduleHandler
        ->alter('advagg_asset_render', $prefetch, $render_type, $asset_type);
    if (isset($placeholders['styles'])) {
        $variables['styles'] = array_merge($prefetch, $variables['styles']);
    }
    else {
        $variables['scripts'] = array_merge($prefetch, $variables['scripts']);
    }
    unset($variables['prefetch']);
    return $variables;
}