<?php
/**
 * @file
 * Module's main file, general definitions and hooks.
 */

/**
 * Implementation of hook_help().
 */
function menu_import_help($path, $arg) {
  $output = '';

  switch ($path) {
    case 'admin/help#menu_import':
      $output .= '<p>';
      $output .= t('Menu Import module allows you to import a menu hierarchy from an indented (by dash or asterix symbol) text file. This can be used to either arrange pre-existing content or stub out an arrangement with new nodes containing initial content.');
      $output .= '</p><p>';
      $output .= t('Text files are expected to have the following structure:');
      $output .= '</p><code>Main page<br />-Sub-page 1<br />-Sub-page 2<br />--Sub-sub-page 3</code>';
      break;
  }

  return $output;
}

/**
 * Implementation of hook_menu().
 */
function menu_import_menu() {
  $items = array();

  $items['admin/structure/menu/import'] = array(
    'title' => 'Import menu',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('menu_import_form'),
    'type' => MENU_LOCAL_TASK,
    'weight' => 10,
    'access arguments' => array('import or export menu'),
    'file' => 'includes/admin.inc',
  );

  $items['admin/structure/menu/export'] = array(
    'title' => 'Export menu',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('menu_import_export_form'),
    'type' => MENU_LOCAL_TASK,
    'weight' => 11,
    'access arguments' => array('import or export menu'),
    'file' => 'includes/export.inc',
  );

  return $items;
}

/**
 * Implementation of hook_permission().
 */
function menu_import_permission() {
  $perms['import or export menu'] = array(
    'title' => t('Import menu from file'),
  );
  return $perms;
}

/**
 * Import menu from text file.
 *
 * @param $uri
 *   uri of the uploaded file.
 * @param $menu_name
 *   iternal name of the menu.
 * @param $options
 *   An associative array of import options. See menu_import_save_menu for reference.
 * @see menu_import_save_menu
 *
 * @return array
 *   An associative array of result.
 *   - error: in case of error, this will contain an array of error messages;
 *   - deleted_nodes: count of nodes deleted;
 *   - matched_nodes: count of nodes matched;
 *   - new_nodes: count of nodes created;
 *   - unknown_links: count of menu items with internal links (not nodes);
 *   - external_links: count of menu items with external links.
 */
function menu_import_file($uri, $menu_name, array $options) {
  module_load_include('inc', 'menu_import', 'includes/import');
  $menu = menu_import_parse_menu_from_file($uri, $menu_name, $options);
  // Stop import on any errors.
  if ($menu['errors']) {
    return array('errors' => $menu['errors']);
  }

  $result = menu_import_save_menu($menu, $options);

  if (!empty($menu['warnings'])) {
    $result['warnings'] = $menu['warnings'];
  }

  return $result;
}

/**
 * Import menu from text variable.
 *
 * @param $text
 *   string containing the menu structure.
 *
 * @see menu_import_file().
 */
function menu_import_string($text, $menu_name, array $options) {
  module_load_include('inc', 'menu_import', 'includes/import');
  $menu = menu_import_parse_menu_from_string($text, $menu_name, $options);
  // Stop import on any errors.
  if ($menu['errors']) {
    return array('errors' => $menu['errors']);
  }

  $result = menu_import_save_menu($menu, $options);

  if (!empty($menu['warnings'])) {
    $result['warnings'] = $menu['warnings'];
  }

  return $result;
}