ding_library.module

<?php
/**
 * @file
 * Code for the Ding library feature.
 */

/**
 * Implements hook_init().
 */
function ding_library_init() {
  // Load ding library map javascript code if we have loaded the library
  // overview page.
  if ($_GET['q'] == 'libraries') {
    drupal_add_js(drupal_get_path('module', 'ding_library') .  '/js/ding_library.map.js', array(
      'defer' => TRUE,
      'scope' => 'footer',
      'weight' => 42,
    ));
  }

  /**
   * @TODO: What does this next part do and why is it needed.
   */
  $args = arg();
  if (sizeof($args) == 2 && $args[0] == 'node' && $node = menu_get_object()) {
    $types = array(
      'ding_event' => 'events',
      'ding_news' => 'news',
    );
    if (isset($types[$node->type])) {
      // Check if node is part of a group. Get all groups.
      if ($groups = og_get_entity_groups('node', $node)) {
        // Load the first.
        $group = og_load(array_shift($groups));
        // The entity_id the group references, is the nid of the library.
        $library_nid = $group->etid;
        // Use the nodes path.
        $path = 'node/' . $library_nid . '/' . $types[$node->type];
      }
      else {
        // Not part of any group, put them under the site list.
        $path = $types[$node->type];
      }

      // Set the active path for the main menu.
      menu_tree_set_path('main-menu', $path);
    };
  }
}

/**
 * Implements hook_enable().
 */
function ding_library_enable() {
  $path = array(
    'source' => 'libraries',
    'language' => 'da',
  );

  // Create Danish alias for libraries if needed.
  if (!path_load($path)) {
    $path['alias'] = 'biblioteker';
    path_save($path);
  }
}



/**
 * Implements hook_block_info().
 */
function ding_library_block_info() {
  return array(
    'library_address' => array(
      'info' => 'Library address',
      'cache' => DRUPAL_CACHE_GLOBAL,
    ),
    'ding_library_menu' => array(
      'info' => 'Ding library menu',
      'cache' => DRUPAL_CACHE_PER_PAGE,
    ),
    'ding_sidebar_menu' => array(
      'info' => 'Ding sidebar menu',
      'cache' => DRUPAL_CACHE_PER_PAGE,
    ),
  );
}

/**
 * Implements hook_block_configure().
 */
function ding_library_block_configure($delta = '') {
  $form = array();
  $libraries = array(
    '' => t('None selected'),
  );
  if ($delta == 'library_address') {
    $query = db_select('node', 'n')
      ->fields('n', array('nid', 'title'))
      ->condition('type', 'ding_library')
      ->orderBy('title', 'ASC');

    foreach ($query->execute() as $row) {
      $libraries[$row->nid] = $row->title;
    }

    $form['library_nid'] = array(
      '#type' => 'select',
      '#title' => t('Library'),
      '#default_value' => variable_get('ding_library_address_nid', NULL),
      '#options' => $libraries,
      '#description' => t('The library whose address to display.'),
    );
  }
  return $form;
}

/**
 * Implements hook_block_save().
 */
function ding_library_block_save($delta = '', $edit = array()) {
  if ($delta == 'library_address') {
    variable_set('ding_library_address_nid', $edit['library_nid']);
  }
}

/**
 * Implements hook_block_view().
 */
function ding_library_block_view($delta = '') {
  $block = array();
  $node = NULL;
  if ($delta == 'library_address' && (($nid = variable_get('ding_library_address_nid', '')) && ($node = node_load($nid)) || user_access('administer blocks'))) {
    $block['subject'] = t('Address');
    $block['content'] = array(
      '#theme' => 'ding_library_address',
      '#node' => $node,
    );
  }
  if ($delta == 'ding_library_menu') {
    $trail = menu_get_active_trail();

    // Get the active menu item.
    $current_item = menu_get_item(menu_tree_get_path('main-menu'));
    // Find the menu_links for the current item and the libraries menu item.
    $links = db_select('menu_links', 'ml')
      ->fields('ml', array('link_path', 'mlid', 'plid', 'p1', 'p2', 'p3'))
      ->condition('menu_name', 'main-menu')
      ->condition('link_path', array('libraries', $current_item['href']))
      ->execute()->fetchAllAssoc('link_path');

    // If p1 (first part of materialised path) is the mlid of the
    // libraries item, the current item lies below it.
    // Unless p2 is 0, then we're on the libraries page itself.
    if (!empty($links['libraries']) && !empty($links[$current_item['href']]) && $links['libraries']->mlid == $links[$current_item['href']]->p1 && $links[$current_item['href']]->p2 != 0) {
      // Find the library menu item, by using p2.
      $library = db_select('menu_links', 'ml')
        ->fields('ml', array('mlid', 'link_path', 'link_title'))
        ->condition('mlid', $links[$current_item['href']]->p2)
        ->execute()->fetchAssoc();
      // Add in the library as the first item of the list.
      $links = array(
        'menu-' . $library['mlid'] => array(
          'href' => $library['link_path'],
          'title' => t('Frontpage'),
        ),
      );
      // And add the library items children.
      $links += menu_navigation_links('main-menu', 2);
      // Theme the lot as a list of links.
      $block['content']['library-menu'] = array(
        '#markup' => theme('links__library_menu', array(
                     'links' => $links,
                     'heading' => array(
                       'text' => $library['link_title'],
                       'level' => 'h2',
                     ),
                   )),
        '#prefix' => '<div class="library-menu clearfix">',
        '#suffix' => '</div>',
      );
    }
  }
  if ($delta == 'ding_sidebar_menu') {
    $trail = menu_get_active_trail();
    if (!empty($trail[1])) {
      $tree = menu_tree_page_data($trail[1]['menu_name']);
      $level = 1;
      // If we have at least 3 levels in the trail and the second item is
      // libraries, we're inside the library 'subsite'.
      if (!empty($trail[1]) && !empty($trail[2]) && $trail[1]['router_path'] == 'libraries') {
        $level = 3;
      }
      // Logic borrowed from menu_navigation_links();
      while ($level-- && $tree) {
        // Loop through the current level's items until we find one that is in trail.
        while ($item = array_shift($tree)) {
          if ($item['link']['in_active_trail']) {
            // If the item is in the active trail, we continue in the subtree.
            $tree = empty($item['below']) ? array() : $item['below'];
            break;
          }
        }
      }

      // If we have a tree, render it.
      if (!empty($tree)) {
        $block['content'] = menu_tree_output($tree);
      }
    }
  }
  return $block;
}

/**
* Implements hook_theme().
 */
function ding_library_theme() {
  return array(
    'ding_library_address' => array(
      'render element' => 'element',
      'template' => 'ding-library-address'
    ),
  );
}

/**
 * Preprocessor.
 */
function template_preprocess_ding_library_address(&$vars) {
  $node = $vars['element']['#node'];

  // Ensure empty strings as default.
  $vars += array(
    'name' => '',
    'address' => '',
    'city' => '',
    'phone' => '',
    'fax' => '',
    'mail' => '',
  );

  if ($node) {
    $languages = field_language('node', $node);
    $vars['name'] = check_plain($node->title);
    if (!empty($node->field_ding_library_address[$languages['field_ding_library_address']][0]) && ($address = $node->field_ding_library_address[$languages['field_ding_library_address']][0])) {
      $vars['address'] = check_plain($address['thoroughfare']);
      if ($address['premise']) {
        $vars['address'] .= ', ' . $address['premise'];
      }
      $vars['city'] = join(' ', array(check_plain($address['postal_code']), check_plain($address['locality'])));
    }

    if (!empty($node->field_phone[$languages['field_phone']][0]) &&
      ($phone = $node->field_phone[$languages['field_phone']][0]['safe_value'])) {
      $vars['phone'] = t('Phone: @phone_number', array('@phone_number' => $phone));
    }

    if (!empty($node->field_email[$languages['field_email']][0]) &&
      ($mail = $node->field_email[$languages['field_email']][0])) {
      $vars['mail'] = l($mail['email'], 'mailto:' . $mail['email']);
    }
  }
  else {
    $vars['name'] = t('Please select a library to display address information for at the <a href="!link">block configuration page</a>.', array('!link' => url('admin/structure/block/manage/ding_library/library_address/configure')));
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function ding_library_form_ding_library_node_form_alter(&$form, &$form_state) {
  if (isset($form['field_ding_library_slug'][$form['#node']->language])) {
    $form['field_ding_library_slug'][$form['#node']->language][0]['#element_validate'][] = 'ding_library_slug_validate';
  }
  elseif (isset($form['field_ding_library_slug']['und'])) {
    $form['field_ding_library_slug']['und'][0]['#element_validate'][] = 'ding_library_slug_validate';
  }
}

/**
 * Implements hook_ctools_plugin_directory -
 */
function ding_library_ctools_plugin_directory($owner, $plugin_type) {
  if ($owner == 'ctools' && $plugin_type == 'content_types') {
    return 'plugins/content_types';
  }
}

/**
 * Custom validate handler for the slug field.
 *
 * Don't allow charecters that aren't URL friendly, such as # , etc.
 */
function ding_library_slug_validate(&$form, &$form_state) {
  // Try to get the slug value.
  if (isset($form_state['values']['field_ding_library_slug'][$form_state['node']->language])) {
    $slug = $form_state['values']['field_ding_library_slug'][$form_state['node']->language][0]['value'];
  }
  elseif (isset($form_state['values']['field_ding_library_slug']['und'])) {
    $slug = $form_state['values']['field_ding_library_slug']['und'][0]['value'];
  }

  // If we found the slug do the actual validation.
  if (!empty($slug)) {
    if (!(preg_match('/^[a-z0-9_\-]+$/', $slug))) {
      form_set_error(implode('][', $form['#parents']), t('Illeagal charecters detected, only small letters (a-z), numbers (0-9), dashes (-) and underscores (_) allowed'));
    }
  }
}

/**
 * Implements hook_views_data_alter().
 */
function ding_library_views_data_alter(&$data) {
  foreach (field_info_fields() as $name => $field) {
    $name = 'field_data_' . $name;
    if ($field['type'] == 'group') {
      foreach ($data[$name] as $column => $views_data) {
        if (strpos($column, 'gid') !== FALSE) {
          $data[$name]['ding_library_nid'] = $views_data;
          unset($data[$name]['ding_library_nid']['filter']);
          unset($data[$name]['ding_library_nid']['sort']);
          $data[$name]['ding_library_nid']['title'] = str_replace('gid', 'nid', $data[$name]['ding_library_nid']['title']);
          $data[$name]['ding_library_nid']['title short'] = str_replace('gid', 'nid', $data[$name]['ding_library_nid']['title short']);
          $data[$name]['ding_library_nid']['argument']['handler'] = 'ding_library_nid_to_gid_argument';
        }
      }
    }
  }
}

/**
 * Implements hook_ding_library_menu_links().
 */
function ding_library_menu_ding_library_menu_links() {
  return array(
    'about' => array(
      'title' => 'About the library',
      'weight' => 11,
    ),
  );
}

include_once('ding_library.features.inc');