editor_list.module 2.87 KB
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<?php

/**
 * Returns an array of node types we are targeting our editor lists for.
 *
 * @return array
 */
function editor_list_node_types() {
  // If we need to add more node types, we just add them to this array.
  return array('article');
}

/**
 * Implements hook_node_access().
 */
function editor_list_node_access($node, $op, $account) {

  $node_types = editor_list_node_types();
  if ( ! is_object($node) || ! in_array($node->type, $node_types) || $op !== 'update') {
    return NODE_ACCESS_IGNORE;
  }

  $allowed_uids = editor_list_uids_from_list($node);
  if (empty($allowed_uids)) {
    return NODE_ACCESS_IGNORE;
  }

  if (in_array($account->uid, $allowed_uids)) {
    return NODE_ACCESS_ALLOW;
  }
}

/**
 * Implements hook_field_access().
 */
function editor_list_field_access($op, $field, $entity_type, $entity, $account) {
  $node_types = editor_list_node_types();
  if ($entity_type === 'node' && is_object($entity) && in_array($entity->type, $node_types)) {
    return editor_list_control_field_access($op, $field, $entity_type, $entity, $account);
  }
}

/**
 * Controls field access for editor list targeted nodes.
 */
function editor_list_control_field_access($op, $field, $entity_type, $entity, $account) {
  if ($op !== 'edit') {
    return;
  }

  $uids = editor_list_uids_from_list($entity);
  if (!in_array($account->uid, $uids)) {
    return;
  }

  // Here we can add other field names to deny access if we want.
  $deny = array('field_editors');
  if (in_array($field['field_name'], $deny)) {
    return false;
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 */
function editor_list_form_article_node_form_alter(&$form, &$form_state, $form_id) {
  $form['#after_build'][] = 'editor_list_node_form_after_build';
}

/**
 * After build function for node forms we use to move the editors list field
 * into the authorship group
 */
function editor_list_node_form_after_build($form, &$form_state) {
  // If the user doesn't have access to the editors list field, we do nothing.
  $field = field_info_field('field_editors');
  if ( ! field_access('edit', $field, 'node', $form['#entity'])) {
    return $form;
  }

  // If the user doesn't have access to authorship group, we do nothing.
  if ($form['author']['#access'] === 0) {
    return $form;
  }

  $field_editors = $form['field_editors'];
  $field_editors['#weight'] = 0;
  $form['author']['additional_authors'] = $field_editors;
  $form['field_editors'] = array();

  return $form;
}

/**
 * Helper function that returns the uids of the users in the editor list of a
 * given node.
 *
 * @param $node
 *  The node object.
 *
 * @return array
 *  Array of user ids.
 */
function editor_list_uids_from_list($node) {
  $users = field_get_items('node', $node, 'field_editors');

  $allowed_uids = array();
  if ($users) {
    $allowed_uids = array_map(function($user) {
      return $user['target_id'];
    }, $users);
  }

  return $allowed_uids;
}