views_php.module

<?php

/**
 * @file
 * Allows to use PHP in views.
 */

use Drupal\Component\Utility\Html;
use Drupal\Component\Render\FormattableMarkup;
use Drupal\Core\Url;
use Drupal\views\ViewExecutable;

/**
 * Menu access callback function; use PHP code to determine whether a user as
 * access.
 */
function views_php_check_access($php_access, $view_name, $display_id, $account = NULL) {
  $user = \Drupal::currentUser();
  static $function = array();

  if (!isset($account)) {
    $account = $user;
  }

  if (!isset($function[$view_name . ':' . $display_id])) {
    $function[$view_name . ':' . $display_id] = create_function('$view_name, $display_id, $account', $php_access . ';');
  }

  ob_start();
  $access = (bool) $function[$view_name . ':' . $display_id]($view_name, $display_id, $account);
  ob_end_clean();
  return $access;
}

/**
 * Helper function; builds form for PHP code options of views handlers/plugins.
 */
function views_php_form_element($handler, $checkbox = NULL, $input, $variables = array()) {
  static $default_variables;

  $user = \Drupal::currentUser();

  if (!isset($default_variables)) {
    $default_variables = array(
      '$view'    => t('The view object.'),
      '$handler' => t('The handler object.'),
      '$plugin'  => t('The plugin object.'),
      '$static'  => t('A variable that can be used to store reusable data per row.'),
      '$row'     => t('Contains the retrieved record from the database per row.'),
      '$data'    => t('Contains the retrieved record from the database for all rows.'),
      '$results' => t('Array containing the view\'s result.'),
      '$cache'   => t('The cache object.'),
    );
  }

  list($name, $title, $description, $use_delimiters) = $input;
  $container = array(
    '#type' => 'container',
    // @todo #tree => FALSE doesn't work here.
    '#parents' => array('options'),
  );

  if (!empty($checkbox)) {
    list($checkbox_name, $checkbox_title, $checkbox_description) = $checkbox;
    $checkbox = array(
      '#type' => 'checkbox',
      '#title' => $checkbox_title,
      '#description' => $checkbox_description,
      '#default_value' => $handler->options[$checkbox_name] && !empty($handler->options[$name]),
    );
    $container['#states'] = array(
      'invisible' => array(
        'input[name="options[use_' . $name . ']"]' => array('checked' => FALSE),
      ),
    );
  }
  $container[$name] = array(
    '#type' => 'textarea',
    '#id' => Html::getId('edit-options-' . $name),
    '#title' => $title,
    '#default_value' => $handler->options[$name],
    '#rows' => 5,
    '#description' => $description . ' <strong>' . ($use_delimiters
      ? t('Use &lt;?php ?&gt; delimiters to enclose PHP code.')
      : t('Do not use &lt;?php ?&gt; delimiters.'))
      . '</strong>',
  );
  // Only users with use PHP permission can set/modify input.
  if (!$user->hasPermission('use PHP for settings')) {
    $container[$name]['#disabled'] = TRUE;
    $container[$name]['#value'] = $container[$name]['#default_value'];
    $container[$name]['#description'] .= ' <strong>' . t('You do not have permission to modify this.') . '</strong>';
  }

  $items = array();
  foreach ($variables as $variable_name => $description) {
    if (is_int($variable_name)) {
      $variable_name = $description;
      $description = isset($default_variables[$description]) ? $default_variables[$description] : '';
    }
    $url = Url::fromUri('internal:', array('fragment' => $container[$name]['#id']));
    $url->setOption('external', TRUE);
    $link = \Drupal::l($variable_name, $url);
    $items[] = new FormattableMarkup('%link: %description', [
        '%link' => $link,
        '%description' => $description,
    ]);

    if (strpos($variable_name, '$row') === 0) {
      $php_value = ($input[0] == 'php_value') ? TRUE : FALSE;

      foreach ($handler->view->display_handler->getHandlers('field') as $field => $field_handler) {
        // Do not add fields that will not have data when evaluating the value code. This occurs because
        // the value code is evaluated in hook_views_post_execute(), but field data is made available in hook_views_pre_render(),
        // which is called after hook_views_post_execute().
        if ($php_value && $field_handler->table != $field_handler->view->base_table) {
          continue;
        }

        $url = Url::fromUri('internal:', array('fragment' => $container[$name]['#id']));
        $url->setOption('external', TRUE);
        $link = \Drupal::l($variable_name . '->' . $field, $url);

                $items[] = new FormattableMarkup('%link: %description', [
                      '%link' => $link,
                      '%description' => $field_handler->label(),
                    ]);
      }
    }
  }
  $container[$name . '_variables'] = array(
    '#type' => 'fieldset',
    '#title' => t('Available variables'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#attributes' => array('class' => array('views-php-variables')),
  );
  $container[$name . '_variables']['variables'] = array(
    '#theme' => 'item_list',
    '#items' => $items,
  );

  if (!empty($checkbox)) {
    return array($checkbox_name => $checkbox, $name => $container);
  }

  return array($name => $container);
}


/**
 * Implements hook_views_pre_execute().
 */
function views_php_views_pre_execute(ViewExecutable $view) {
  if (!empty($view->views_php)) {

    foreach (array(/*'argument',*/ 'field', 'filter', 'sort', /*'relationship'*/) as $type) {
      foreach ($view->$type as $id => $handler) {
        if (is_callable(array($handler, 'phpPreExecute'))) {
          $handler->phpPreExecute();
        }
      }
    }

    $view->query->setLimit(0);
    $view->query->setOffset(0);
  }
}

/**
 * Implements hook_views_post_execute().
 */
function views_php_views_post_execute(ViewExecutable $view) {
  if (!empty($view->views_php)) {
    foreach (array(/*'argument',*/ 'field', 'filter', 'sort', /*'relationship'*/) as $type) {
      foreach ($view->$type as $id => $handler) {
        if (is_callable(array($handler, 'phpPostExecute'))) {
          $handler->phpPostExecute();
        }
      }
    }
  }
}

/**
 * Implements hook_views_pre_render().
 */
function views_php_views_pre_render(ViewExecutable $view) {
  if (!empty($view->views_php)) {
    foreach (array(/*'argument',*/ 'field', 'filter', 'sort', /*'relationship'*/) as $type) {
      foreach ($view->$type as $id => $handler) {
        if (is_callable(array($handler, 'phpPreRender'))) {
          $handler->phpPreRender();
        }
      }
    }

    $view->pager->total_items = count($view->result);
    $view->pager->updatePageInfo();

    $item_per_page = $view->pager->getItemsPerPage();
    if ($item_per_page > 0) {
      $offset = $view->pager->getCurrentPage() * $item_per_page + $view->pager->getOffset();
      $view->result = array_slice($view->result, $offset, $item_per_page);
    }
  }
}

/**
 * Internal support: create_function() emulation using anonymous functions.
 *
*/
function views_php_create_function($args, $code) {
    return eval('return function (' . $args . ') {' . $code . '};');
}