content_access_simpleui.module

<?php

/**
 * @file
 * Provides a simpler user interface for Content Access when
 * "per content access control" is enabled.
 */

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adds UI/UX improvements to the content access control per node form.
 */
function content_access_simpleui_form_content_access_page_alter(&$form, &$form_state, $form_id) {
  // Add styles to add support to sites with 25+ configured roles
  // and support for the changes made this form's configuration.
  drupal_add_css(
    drupal_get_path('module', 'content_access_simpleui') . '/content_access_simpleui.css',
    array('group' => CSS_DEFAULT, 'every_page' => FALSE)
  );

  // Get the node's type (bundle) name and convert it to lowercase.
  $content_type_name = node_type_get_name($form_state['node']->type);
  $content_type_name = drupal_strtolower($content_type_name);

  // Change the fieldset's title and description to better reflect
  // the form's functionality and behavior.
  $form['per_role']['#title'] = t('User Roles');
  $form['per_role']['#description'] =  t(
    'Select the user roles allowed to view, edit, and/or delete this %content_type.',
    array('%content_type' => $content_type_name)
  );

  // Hide the view_own, update_own, and delete_own permissions.
  // (These permissions may be confusing to users, and they aren't
  //  necessary when editing a node's role-based access controls.)
  $form['per_role']['view_own']['#access'] = FALSE;
  $form['per_role']['update_own']['#access'] = FALSE;
  $form['per_role']['delete_own']['#access'] = FALSE;

  // Change the titles of the view, update, and delete permissions
  // to better reflect the form's functionality and behavior.
  $form['per_role']['view']['#title'] = t('View this %content_type', array('%content_type' => $content_type_name));
  $form['per_role']['update']['#title'] = t('Edit this %content_type', array('%content_type' => $content_type_name));
  $form['per_role']['delete']['#title'] = t('Delete this %content_type', array('%content_type' => $content_type_name));

  // Change the #after_build callback to the one included in this module.
  $form['per_role']['#after_build'][] = 'content_access_simpleui_force_permissions';

  // Change the reset submit callback to the one included in this module.
  $form['reset']['#submit'] = array('content_access_simpleui_page_reset');
}

/**
 * Implements hook_menu_alter().
 *
 * Changes the access callback for 'node/%node/access' to a custom callback
 * with additional behavior.
 */
function content_access_simpleui_menu_alter(&$items) {
  $items['node/%node/access']['access callback'] = 'content_access_simpleui_content_access_node_page_access';
}

/**
 * Custom form #after_build callback.
 *
 * Disables checkboxes for roles granted global access to the content type.
 */
function content_access_simpleui_force_permissions($element, &$form_state) {
  foreach (array('view', 'view_own') as $op) {
    foreach (content_access_get_settings($op, $form_state['node']->type) as $rid) {
      $element[$op][$rid]['#disabled'] = TRUE;
      $element[$op][$rid]['#attributes']['disabled'] = 'disabled';
      $element[$op][$rid]['#value'] = TRUE;
      $element[$op][$rid]['#checked'] = TRUE;
      $element[$op][$rid]['#prefix'] = '<span' . drupal_attributes(array('title' => t("Permission is granted due to the content type's access control settings."))) . '>';
      $element[$op][$rid]['#suffix'] = "</span>";
    }
  }
  return $element;
}

/**
 * Custom form submit callback.
 *
 * Customized version of content_access's content_access_page_reset
 * submit callback. This version correct the message by correcting 'reseted'
 * to 'reset'.
 *  
 * @todo Once the Drupal.org Patch content_access and remove function
 *   and reference to it in cls_content_form_content_access_page_alter().
 * @link https://www.drupal.org/node/2310557 
 */
function content_access_simpleui_page_reset($form, &$form_state) {
  content_access_delete_per_node_settings($form_state['node']);
  node_access_acquire_grants($form_state['node']);

  // Corrected 'reseted' to 'reset'.
  drupal_set_message(t('The permissions have been reset to the content type\'s defaults.'));
}

/**
 * Custom menu access callback.
 *
 * Customized version of content_access's content_access_node_page_access
 * menu access callback.  This version allows anyone with the
 * 'grant own content access' permission and the update node access grant
 * to edit a node's access control settings.
 */
function content_access_simpleui_content_access_node_page_access($node) {
  global $user;
  return content_access_get_settings('per_node', $node->type) && user_access('grant content access') ||
  content_access_get_settings('per_node', $node->type) && (user_access('grant own content access') && ($user->uid == $node->uid)) ||
  content_access_get_settings('per_node', $node->type) && (user_access('grant own content access') && node_access('update', $node));
}