function quicklink_preprocess_html in Quicklink 2.0.x

Same name and namespace in other branches

1. 8 quicklink.module \quicklink_preprocess_html()
2. 7 quicklink.module \quicklink_preprocess_html()

Implements hook_preprocess_html().

File

./quicklink.module, line 66

Contains quicklink.module.

Code

function quicklink_preprocess_html(&$variables, $hook) {

  // Load current configuration.
  $config = \Drupal::config('quicklink.settings');

  // Ensure that configuration changes are reflected immediately, without
  // manual clearing of caches.
  $variables['#cache']['tags'] = $config
    ->getCacheTags();
  $selector = $config
    ->get('selector');

  // Get debug variable.
  $debug = $config
    ->get('enable_debug_mode');
  $debug_log = [];

  // Load the library unless we disable later.
  $load_library = TRUE;

  // Always ignore the logout link.
  $url_patterns_to_ignore = [
    'user/logout',
  ];
  $debug_log[] = 'Quicklink will ignore "user/logout" URL pattern.';
  $allowed_domains = [];

  // Populate and remove line returns from URL patterns to ignore.
  foreach (explode(PHP_EOL, $config
    ->get('url_patterns_to_ignore')) as $value) {
    $pattern = str_replace("\r", '', $value);
    if (!empty($pattern)) {
      $url_patterns_to_ignore[] = $pattern;
      $debug_log[] = "Quicklink will ignore link hrefs that contain '" . $pattern . "'.";
    }
  }

  // Populate and remove line returns from "Ignore Selectors".
  $ignore_selectors = [];
  foreach (explode(PHP_EOL, $config
    ->get('ignore_selectors')) as $value) {
    $pattern = str_replace("\r", '', $value);
    if (!empty($pattern)) {
      $ignore_selectors[] = $pattern;
      $debug_log[] = "Quicklink will ignore links that match the '" . $pattern . "' selector.";
    }
  }

  // Populate and remove line returns from allowed domains.
  foreach (explode(PHP_EOL, $config
    ->get('allowed_domains')) as $value) {
    $domain = str_replace("\r", '', $value);
    if (!empty($domain)) {
      $allowed_domains[] = $domain;
    }
  }

  // Populate and remove line returns from "Prefetch these paths only".
  foreach (explode(PHP_EOL, $config
    ->get('prefetch_only_paths')) as $value) {
    $path = str_replace("\r", '', $value);
    if (!empty($path)) {
      $prefetch_only_paths[] = $path;
    }
  }

  // Check for "Ignore Hashes" option.
  if ($config
    ->get('ignore_hashes') == 1) {
    $url_patterns_to_ignore[] = '#';
    $debug_log[] = 'Quicklink will ignore URLs with hashes(#).';
  }

  // If "Ignore admin paths" is selected, ignore the admin paths.
  if ($config
    ->get('ignore_admin_paths') == 1) {
    $url_patterns_to_ignore[] = '/admin';
    $url_patterns_to_ignore[] = '/edit';

    // If elements match these selector pattern, they will not be prefetched.
    $admin_link_container_patterns = [
      '#block-local-tasks-block a',
      '.block-local-tasks-block a',
      '#drupal-off-canvas a',
      '#toolbar-administration a',
    ];
    $variables['#attached']['drupalSettings']['quicklink']['admin_link_container_patterns'] = $admin_link_container_patterns;
    $debug_log[] = 'Quicklink will ignore admin URL patterns.';
  }

  // Check for "Content Types" option.
  $nodes = array_filter(\Drupal::routeMatch()
    ->getParameters()
    ->all(), function ($param) {
    return $param instanceof NodeInterface;
  });

  // We can only deal with one node. We'll assume it's the first one.
  $node = reset($nodes);
  if (!empty($node)) {
    $node_type = $node
      ->bundle();
    $no_load_content_types = $config
      ->get('no_load_content_types');
    if (array_key_exists($node_type, $no_load_content_types) && $no_load_content_types[$node_type] !== 0) {
      $load_library = FALSE;
      $debug_log[] = 'Library not loaded because content type "' . $node_type . '" is specified to not load library.';
    }
  }

  // If user is logged in AND "Prefetch for anonymous users only" is selected,
  // do not load library.
  if ($variables['logged_in'] && $config
    ->get('no_load_when_authenticated') == 1) {
    $load_library = FALSE;
    $debug_log[] = 'Library not loaded because user is authenticated.';
  }

  // Disable the library when a session is started.
  if ($config
    ->get('no_load_when_session')) {
    $variables['#cache']['contexts'][] = 'session.exists';
    $session_configuration = \Drupal::getContainer()
      ->get('session_configuration');
    if ($session_configuration
      ->hasSession(\Drupal::request())) {
      $load_library = FALSE;
      $debug_log[] = 'Library not loaded because PHP session is started.';
    }
  }

  // Add parameters to debug log.
  $debug_log[] = 'Total request limit: ' . $config
    ->get('total_request_limit', 0) . '.';
  $debug_log[] = 'Concurrency Limit: ' . $config
    ->get('concurrency_throttle_limit', 0) . '.';
  $debug_log[] = 'Idle wait timeout: ' . $config
    ->get('idle_wait_timeout', 2000) . ' ms.';
  $debug_log[] = 'Viewport Delay: ' . $config
    ->get('viewport_delay', 0) . ' ms.';
  if ($load_library || $debug) {
    $variables['#attached']['library'][] = 'quicklink/quicklink_init';
    $variables['#attached']['drupalSettings']['quicklink']['ignore_admin_paths'] = $config
      ->get('ignore_admin_paths');
    $variables['#attached']['drupalSettings']['quicklink']['ignore_ajax_links'] = $config
      ->get('ignore_ajax_links');
    $variables['#attached']['drupalSettings']['quicklink']['ignore_file_ext'] = $config
      ->get('ignore_file_ext');
    $variables['#attached']['drupalSettings']['quicklink']['total_request_limit'] = $config
      ->get('total_request_limit', 0);
    $variables['#attached']['drupalSettings']['quicklink']['concurrency_throttle_limit'] = $config
      ->get('concurrency_throttle_limit', 0);
    $variables['#attached']['drupalSettings']['quicklink']['idle_wait_timeout'] = $config
      ->get('idle_wait_timeout', 2000);
    $variables['#attached']['drupalSettings']['quicklink']['viewport_delay'] = $config
      ->get('viewport_delay', 0);
    $variables['#attached']['drupalSettings']['quicklink']['debug'] = $debug;
    if (!empty($url_patterns_to_ignore[0])) {
      $variables['#attached']['drupalSettings']['quicklink']['url_patterns_to_ignore'] = $url_patterns_to_ignore;
      $debug_log['url_patterns_to_ignore'][] = $url_patterns_to_ignore;
    }
    if (!empty($ignore_selectors[0])) {
      $variables['#attached']['drupalSettings']['quicklink']['ignore_selectors'] = $ignore_selectors;
      $debug_log['ignore_selectors'][] = $ignore_selectors;
    }
    if (!empty($selector)) {
      $variables['#attached']['drupalSettings']['quicklink']['selector'] = $selector;
      $debug_log[] = 'Selector for Quicklink to parse: ' . $selector;
    }
    if (!empty($allowed_domains[0])) {
      $variables['#attached']['drupalSettings']['quicklink']['allowed_domains'] = $allowed_domains;
      $debug_log['allowed_domains'][] = $allowed_domains;
    }
    if (!empty($prefetch_only_paths[0])) {
      $variables['#attached']['drupalSettings']['quicklink']['prefetch_only_paths'] = $prefetch_only_paths;
      $debug_log['prefetch_only_paths'][] = $prefetch_only_paths;
    }
    if ($load_library) {
      if ($config
        ->get('load_polyfill') == 1) {
        $variables['#attached']['library'][] = 'quicklink/quicklink_polyfill';
        $debug_log[] = 'Intersection Observer polyfill library loaded';
      }
      $variables['#attached']['library'][] = 'quicklink/quicklink';
    }
    if ($debug) {
      $variables['#attached']['drupalSettings']['quicklink']['debug'] = 1;
      $variables['#attached']['library'][] = 'quicklink/quicklink_debug';
      $variables['#attached']['drupalSettings']['quicklink']['debug_log'] = $debug_log;
    }
  }
}