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<?php
// $Id$

/**
 * @file
 * Implementation of a jQuery Drawer.
 *
 * This module implements the jQuery.drawer navigation menu
 * from http://lib.metatype.jp/jquery_drawer/sample.html
 */

/**
 * Implementation of hook_uninstall();
 */
function jquery_drawer_uninstall() {
  variable_del('jquery_drawer');
}

/**
 * Implementation of hook_init();
 */
function jquery_drawer_init() {
  theme('jquery_drawer_css');
  theme('jquery_drawer_javascript');
}

/**
 * Implementation of hook_block();
 */
function jquery_drawer_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
      $blocks[0]['info']  = t('jQuery Drawer');
      $blocks[0]['cache'] = BLOCK_NO_CACHE;
      return $blocks;

    case 'configure':
      $form['jquery_drawer'] = array(
        '#type'          => 'select',
        '#title'         => t('Select the vocabulary to list'),
        '#default_value' => variable_get('jquery_drawer', '1'),
        // TODO: won't work with taxonomy_get_vocabularies()
        '#options'       => menu_parent_options(taxonomy_get_vocabularies(), 0),
      );
      return $form;

    case 'save':
      variable_set('jquery_drawer', $edit['jquery_drawer']);
      break;

    case 'view':
      // Get all terms from a given vocabulary
      $vid              = variable_get('jquery_drawer', '1');
      $menu             = taxonomy_node_tree_parents($vid);
      $block['content'] = theme('jquery_drawer', $menu);
      return $block;
  }
}

/**
 * Implementation of hook_menu();
 */
function jquery_drawer_menu() {
  $items['jquery_drawer'] = array(
    'title'            => 'jQuery Drawer',
    'description'      => 'Displays content inside a jQuery Drawer.',
    'page callback'    => 'jquery_drawer_page',
    'access arguments' => array('access content'),
    'type'             => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Implementation of hook_theme();
 */
function jquery_drawer_theme() {
  return array(
      'jquery_drawer' => array(
        'arguments'   => array(
          'menu'      => NULL,
          ),
        ),
      'jquery_drawer_javascript' => array(
        'arguments'              => array(),
        ),
      'jquery_drawer_css'        => array(
        'arguments'              => array(),
        ),
      'jquery_drawer_link'       => array(
        'arguments'              => array(),
        ),
      );
}

/**
 * Drawer logic.
 * @ingroup themeable
 */
function theme_jquery_drawer($menu) {

  $output  = '<ul id="drw_tabs">';
  $output .= implode((array) module_invoke_all('jquery_drawer'));

  foreach ($menu as $item) {
    $link['title'] = $item->name;
    $link['href']  = 'jquery_drawer/' . $item->tid;
    $output       .= theme('jquery_drawer_link', $link);
  }

  $output .= '</ul>';
  $output .= '<div id="drw">';
  $output .= '</div>';
  return $output;

}

/**
 * Menu callback.
 */
function jquery_drawer_page($tid = null) {
  // First render all nodes whose parent is $term

  $output = '';
  $nodes = taxonomy_select_nodes(array($tid));
  
  while ($node = db_fetch_object($nodes)) {
    $link['title']  = $node->title;
    $link['href']   = 'node/' . $node->nid;
    $output        .= theme('jquery_drawer_link', $link);
  }

  // Then render all nodes whose terms are children of $term
  
  $vocabulary = variable_get('jquery_drawer', '1');
  $terms      = taxonomy_node_tree_taxonomy_get_tree($vocabulary, $tid);

  foreach ($terms as $term) { 
    $filter[] = $term->tid;
  }

  $query  = 'SELECT node.nid, node.title, term_node.tid FROM {node} LEFT JOIN 
             {term_node} ON term_node.nid = node.nid WHERE term_node.tid IN (%s)
             AND node.status = "1"';

  $result = db_query(db_rewrite_sql($query), implode(',', $filter));
  $tree   = taxonomy_node_tree_build($result, $terms);

  // format output
  $output .= '<ul id="drw_item" class="hidden">';
  foreach ($tree as $term) {
    $output .= jquery_drawer_menu_build($term);
  }
  $output .= '</ul></li>';

  // Display output
  echo($output);

  // We need to exit here to avoid themeable output
  exit();
}

/**
 * Recursively build the menu.
 *
 * @ingroup themeable
 */
function jquery_drawer_menu_build($term) {

  global $jquery_drawer_id;

  if ($jquery_drawer_id == null) {
    $jquery_drawer_id = 0;
  }

  $jquery_drawer_id++;

  if (isset($term->tid)) {
    $output .= '<li>';
    $output .= $term->name;
    if (isset($term->below)) {
      $output .= '<ul id="jquery_drawer[ul][' . $jquery_drawer_id . ']" class="hidden">';
      foreach($term->below as $child) {
        $output .= jquery_drawer_menu_build($child);
      }
      $output .= '</ul>';
    } else if (isset($term->nodes)) {
      $output .= '<ul id="jquery_drawer[ul][' . $jquery_drawer_id . ']" class="hidden">';
      foreach ($term->nodes as $node) {
        $output .= '<li>';
        $output .= '<a href="' . $GLOBALS['base_url'] . '/node/' . $node->nid . '">' . $node->title . '</a>';
      }
      $output .= '</ul>';
      $output .= '</li>';
    }
    $output .= '</li>';
  }

  return $output;

}

/**
 * jQuery Drawer Javascript theme function.
 *
 * @ingroup themeable
 */
function theme_jquery_drawer_javascript() {
  drupal_add_js(drupal_get_path('module', 'jquery_drawer') .'/jquery_drawer/drw/scripts.js');
}

/**
 * jQuery Drawer CSS theme function.
 *
 * @ingroup themeable
 */
function theme_jquery_drawer_css() {
  drupal_add_css(drupal_get_path('module', 'jquery_drawer') .'/jquery_drawer/drw/styles.css');
  drupal_add_css(drupal_get_path('module', 'jquery_drawer') .'/jquery_drawer.css');
}

/**
 * jQuery Drawer Link theme function.
 *
 * @ingroup themeable
 */
function theme_jquery_drawer_link($link) {
  if (empty($link['localized_options'])) {
    $link['localized_options'] = array();
  }

  $link['attributes']['rel'] = 'drw';

  $output  = '<li class="drw_li">';
  $output .= l($link['title'], $link['href'], array('attributes' => array('rel' => 'drw')));
  $output .= '</li>';

  return $output;
}