views_exclude_previous.module in Views exclude previous 8

Main file of the views exclude previous module.

File

views_exclude_previous.module

<?php

/**
 * @file
 * Main file of the views exclude previous module.
 */
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Entity\Display\EntityViewDisplayInterface;

/**
 * Implements hook_help().
 */
function views_exclude_previous_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.views_exclude_previous':
      $output = '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Views Exclude Previous provides a views filter which exlcudes nodes that have already been loaded/displayed on the current page.') . '</p>';
      return $output;
  }
}

/**
 * Implements hook_node_load().
 */
function views_exclude_previous_node_load($nodes) {
  foreach ($nodes as $nid => $node) {
    _views_exclude_previous('node_load', $nid);
  }
}

/**
 * Implements hook_ENTITY_TYPE_view() for node entities.
 */
function views_exclude_previous_node_view(array &$build, EntityInterface $node, EntityViewDisplayInterface $display, $view_mode) {
  _views_exclude_previous('node_view', $node
    ->id());
}

/**
 * This function stores/returns nids for the given category.
 *
 * Static storage of our excluded nids.
 *
 * @param string $cat
 *   A category given by the exclude plugin.
 * @param int $nid
 *   The nid to be excluded. Optional so the function just returns the category.
 *
 * @return array
 *   Always returns the given category.
 */
function _views_exclude_previous($cat, $nid = NULL) {
  $excludes =& drupal_static(__FUNCTION__);

  // Add nid to be excluded in the current category.
  if (!empty($nid)) {
    $excludes[$cat][$nid] = $nid;
  }
  return !empty($excludes[$cat]) ? $excludes[$cat] : [
    0,
  ];
}

Functions

Name	Description
views_exclude_previous_help	Implements hook_help().
views_exclude_previous_node_load	Implements hook_node_load().
views_exclude_previous_node_view	Implements hook_ENTITY_TYPE_view() for node entities.
_views_exclude_previous	This function stores/returns nids for the given category.