function node_ranking in Drupal 8

Same name and namespace in other branches

1. 7 modules/node/node.module \node_ranking()
2. 9 core/modules/node/node.module \node_ranking()

Implements hook_ranking().

File

core/modules/node/node.module, line 725

The core module that allows content to be submitted to the site.

Code

function node_ranking() {

  // Create the ranking array and add the basic ranking options.
  $ranking = [
    'relevance' => [
      'title' => t('Keyword relevance'),
      // Average relevance values hover around 0.15
      'score' => 'i.relevance',
    ],
    'sticky' => [
      'title' => t('Content is sticky at top of lists'),
      // The sticky flag is either 0 or 1, which is automatically normalized.
      'score' => 'n.sticky',
    ],
    'promote' => [
      'title' => t('Content is promoted to the front page'),
      // The promote flag is either 0 or 1, which is automatically normalized.
      'score' => 'n.promote',
    ],
  ];

  // Add relevance based on updated date, but only if it the scale values have
  // been calculated in node_cron().
  if ($node_min_max = \Drupal::state()
    ->get('node.min_max_update_time')) {
    $ranking['recent'] = [
      'title' => t('Recently created'),
      // Exponential decay with half life of 14% of the age range of nodes.
      'score' => 'EXP(-5 * (1 - (n.created - :node_oldest) / :node_range))',
      'arguments' => [
        ':node_oldest' => $node_min_max['min_created'],
        ':node_range' => max($node_min_max['max_created'] - $node_min_max['min_created'], 1),
      ],
    ];
  }
  return $ranking;
}