<?php
// $Id$

/**
 * @file
 * Produces the Navigate Menu widget
 */

/**
 * Implementation of hook_init().
 */
function navigate_menu_init() {
  if (user_access('navigate_menu use')) {
    navigate_add_js('jquery.treeview.js', 'navigate_menu');
    navigate_add_js('navigate_menu.js', 'navigate_menu');
    navigate_add_css('navigate_menu.css', 'navigate_menu');
    navigate_add_css('jquery.treeview.css', 'navigate_menu');
  }
}

/**
 * Implementation of hook_navigate_ajax().
 */
function navigate_menu_navigate_ajax($op, $data) {
  switch ($op) {
    case 'output':
      navigate_json(array(
        'wid'     => $data['wid'],
        'content' => navigate_menu_output($data['mid'], $data['wid']),
      ));
      break;
  }
}

/**
 * Implementation of hook_navigate_permissions().
 */
function navigate_menu_navigate_permissions() {
  return array(
    'navigate_menu' => array(
      '#title' => 'Menu',
      'view',
    )
  );
}

/**
 * Implementation of hook_navigate_plugin().
 */
function navigate_menu_navigate_plugin($op, $widget = NULL) {
  switch ($op) {
    
    case 'display':
      $mid = navigate_variable_get('menu_mid', FALSE, $widget['wid']);
      // Use the name of the menu as the title if a custom set title doesn't exist
      if (empty($widget['title'])) {
        $widget['title'] = navigate_menu_get_title($mid);
      }
      return array(
        // Content to display for a widget with this plugin type
        'content'     => navigate_menu_output($mid, $widget['wid']),
        // Settings to display for a widget with this plugin type.
        'settings'    => array(
          // To create a new tab in the widget's settings, use a unique name (preferably the plugin name).
          // Otherwise if  exists, only the content will be used and appended to content that already exists.
          'navigate_menu' => array(
            'title'       =>  'Menu',
            'description' => 'Modify this widget\'s menu settings',
            'content'     =>  navigate_menu_form($mid) .
                              navigate_callback_button(array(
                                'callback'     => 'loadMenu',
                                'id'           => 'load-menu',
                                'plugin'       => 'navigate_menu',
                                'tooltip'      => 'Click to load this menu.',
                                'value'        => t('Load'),
                                'wid'          => $widget['wid'],
                              )),
          ),
        ),
      );
      break;
      
    case 'delete':
      break;

    // Create an add widget link in the settings dialog
    case 'widget_add':
      return array(
        'plugin'  => 'navigate_menu',
        'name'    => 'Menu',
        'icon'    => '/' . drupal_get_path('module', 'navigate_menu') . '/icon.png',
        'single'  => FALSE,
      );
      break;


    // Include this default widget when a user does not have any to display
    case 'widget_default':
      return array(
        'title' => 'Navigation',
        'weight' => 0,
        'plugin' => array(
          'type'     => 'navigate_menu',
          'settings' => array(
            'menu_mid' => 'navigation:0',
          ),
        ),
      );
      break;
    
    // Return an empty array otherwise
    default:
      return array();
      break;
  }
}

function navigate_menu_get_title($mid) {
  $menu = explode(':', $mid);
  $title = db_result(db_query("SELECT link_title FROM {menu_links} WHERE menu_name='" . $menu[0] . "' AND mlid='" . $menu[1] . "'"));
  if ($menu[1] == 0) {
    $title = ucwords(str_replace("-", " ", $menu[0]));
  }
  return $title;
}

function navigate_menu_form($mid = 'primary-links:0') {
  $item = menu_link_load(1);
  $options = menu_parent_options(menu_get_menus(), $item);
  $form['menu'] = array(
    '#type' => 'select',
    '#title' => t('Parent item'),
    '#default_value' => $mid,
    '#name' => 'menu',
    '#value' => $mid,
    '#options' => $options,
    '#parents' => array(''),
  );
  return drupal_render($form);
}

/**
 * Output the selected menu
 */
function navigate_menu_output($mid, $wid) {
  $output = '';
  if (!empty($mid)) {
    $output = navigate_menu_tree($mid);
  }
  return theme('navigate_menu_output', $output, $wid);
}

/**
 * Theme menu widget
 */
function theme_navigate_menu_output($output, $wid) {
  $output = '<div class="navigate-menu-menu"><ul id="navigate-menu-list-'. $wid .'" class="navigate-menu-list treeview-gray">'. $output .'</ul></div>';
  return $output;
}

/**
 * Part of a series of functions to generate a specific menu tree
 *
 * Please note, this is a total hack. There must be a better way. Basically,
 * this recurses through the entire menu, trying to find one that has the
 * selected mlid in it. If it does, it returns that sub-array.
 */
function navigate_menu_sub_tree($data='', $menu_id='') {
  static $id;
  static $return;
  if ($menu_id != '') {
    $id = $menu_id;
  }
  if (!is_array($data)) {
    $data = menu_tree_all_data();
  }
  foreach ($data as $key => $sub_data) {
    $data['link']["hidden"] = isset($data['link']["hidden"]) ? $data['link']["hidden"] : NULL;
    if ($data['link']["hidden"] == 0) {
      $key_parts = explode(' ', $key);
      if (end($key_parts) == $id) {
        $return = $sub_data;
        break;
      }
      _navigate_menu_sub_tree($sub_data);
    }
  }
  return $return['below'];
}


/**
 * Helper function for navigate_menu_sub_tree()
 */
function _navigate_menu_sub_tree($data) {
  if ($data['below']) {
    $content = navigate_menu_sub_tree($data['below']);
  }
}


/**
 * Renders a menu in list format
 */
function navigate_menu_tree($data) {
  $output = '';
  if (is_string($data)) {
    $nav_array = explode(':', $data);
    if ($nav_array[1] > 0) {
      $data = navigate_menu_sub_tree('', $nav_array[1]);
    }
    else {
      $data = menu_tree_all_data($nav_array[0]);
    }
  }
  if (is_array($data)) {
    foreach ($data as $key => $data) {
      if ($data['link']["hidden"] == 0) {
        $output .= '<li class="leaf"><a title="'. strip_tags(str_replace('"', "'", $data['link']['description'])) .'" href="'. url($data['link']['href']) .'">'. $data['link']["title"] .'</a>'. _navigate_menu_tree($data) .'</li>';
      }
    }
    return $output;
  }
}


/**
 * Helper function for navigate_menu_tree()
 */
function _navigate_menu_tree($data) {
  if ($data['below']) {
    $content = navigate_menu_tree($data['below']);
    if ($content != '') {
      return '<ul>'. navigate_menu_tree($data['below']) .'</ul>';
    }
  }
}


/**
 * Implementation of hook_navigate_help_page().
 */
function navigate_menu_navigate_help_page() {
  $help['content'] = t('<p>The Menu widget allows you add an expandable menu widget to your Navigate bar. After adding a Menu widget, you willl see a select box with a menu listing. Select the menu you would like to load and click the "Load" button to load it into the widget. Once a menu is loaded, there are no additional settings.</p>');
  $help['title'] = 'Menu';
  $help['access'] = user_access('navigate_menu use');
  return $help;
}


/**
 * Implementation of hook_theme().
 */
function navigate_menu_theme() {
  return array('navigate_menu_output' => array('arguments' => array('output' => NULL, 'wid' => NULL)));
}