<?php
/**
 * @file
 * This custom code is intended to handle situations in which a directory person is privately flagged,
 *  and the user does not have permission to see that person.
 */

include_once('directory.features.inc');

/**
 * Implements hook_permission.
 *
 * Provides a permission to restrict the visibility of private-flagged directory persons.
 */
function directory_permission() {
    return array('view private directory persons' => array('title' => t('View private directory persons')));
}

/**
 * Implements hook_node_access.
 *
 * Restricts visibility of private-flagged directory persons to people with the appropriate permission.
 *
 * @param node
 *   The node being accessed.
 * @param op
 *   The operation being requested.
 */
function directory_node_access($node, $op) {
    if ($node->type == 'directory_person') {
        $private = flag_get_flag('directory_person_private') or die ('private flag does not exist');
        if ($op == 'view' && !user_access('view private directory persons') && $private->is_flagged($node->nid)) {
            return NODE_ACCESS_DENY;
        }
    } else {
        return NODE_ACCESS_IGNORE;
    }
}

/**
 * Implements hook_page_alter.
 *
 * Removes redundant public directory index block if user has access to private directory index block.
 *
 * @param page
 *   The page array that is used to build the page.
 */
function directory_page_alter(&$page) {
    if (user_access('view private directory persons')) {
        foreach (system_region_list(variable_get('theme_default'), REGIONS_VISIBLE) as $region => $value) {
            if (isset($page[$region]['views_directory-directory_block_index'])) {
                unset($page[$region]['views_directory-directory_block_index']);
            }
        }
    }
}