taxonomy_image_link_alter.module in Taxonomy Image 5

Change taxonomy links to show term images.

File

contributed/taxonomy_image_link_alter/taxonomy_image_link_alter.module

<?php

/**
 * @file
 * Change taxonomy links to show term images.
 */

/**
 *  Implement hook_link_alter to picturize the taxonomy term links
 */
function taxonomy_image_link_alter(&$node, &$links) {

  // We make these static so we only have to get them once per page view.
  static $type_enabled, $show_name, $preset;
  if (!isset($type_enabled)) {
    $type_enabled = variable_get('taxonomy_image_link_types', array());
    $show_name = variable_get('taxonomy_image_link_show_name', 0);
    $preset = variable_get('taxonomy_image_link_preset', 'ORIGINAL');
  }

  // Is the type one we want to change?
  $type_enabled = variable_get('taxonomy_image_link_types', array());
  if (!$type_enabled[$node->type]) {
    return;
  }
  drupal_add_css(drupal_get_path('module', 'taxonomy_image') . '/taxonomy_image.css');
  $tid_list = array();
  foreach ($links as $module => $link) {
    if (strstr($module, 'taxonomy_term')) {

      // Link back to my display and not the taxonomy term page
      $tid_list[] = $tid = substr($module, 14);
      $term = taxonomy_image_get_object($tid);
      $tname = $show_name ? '<br />' . $term->name : NULL;

      // See if we have a taxonomy image associated with this term
      $taxo_image = taxonomy_image_display($term->tid, NULL, $preset, array(
        'wrapper' => FALSE,
      ));
      if ($taxo_image) {
        if (isset($links[$module]['attributes']['class'])) {
          $links[$module]['attributes']['class'] .= ' taxonomy-image-link-alter';
        }
        else {
          $links[$module]['attributes']['class'] = 'taxonomy-image-link-alter';
        }
        $links[$module]['title'] = $taxo_image . $tname;
        $links[$module]['html'] = TRUE;

        /* if we don't do this, it will come out as text */
      }
    }
  }
  $sort_order = variable_get('taxonomy_image_link_sort_links', 0);

  // If we don't want to sort, go back now.
  if ($sort_order == 0) {
    return;
  }
  switch ($sort_order) {
    case 1:

      // Alphabetically
      $sort_fields = array(
        'v.weight',
        'v.name',
        't.weight',
        't.name',
      );
      break;
    case 2:

      // By ID
      $sort_fields = array(
        'v.weight',
        'v.vid',
        't.weight',
        't.tid',
      );
      break;
    default:

      // Should never get here.
      drupal_set_message(t('Unknown sort order (@order) configured.', array(
        '@order' => $sort_order,
      )), 'error');
      return;
  }
  $fields = array();
  foreach ($sort_fields as $index => $field_name) {
    $fields[] = $field_name . ' AS field' . $index;
  }

  // Save the taxo link data into a temporary table.
  // We do this because PHP can't properly sort anything but English.
  $tquery = 'SELECT ' . implode(', ', $fields) . ', t.tid ' . "FROM `term_data` t LEFT JOIN `vocabulary` v USING (vid) WHERE t.tid IN ('" . implode("', '", $tid_list) . "')";
  $result = db_query_temporary($tquery, 'ti_link_alter');

  // Now read them back in the proper order.
  $result = db_query("SELECT * FROM {ti_link_alter} ORDER BY field0, field1, field2, field3");
  $new_links = array();
  while ($row = db_fetch_object($result)) {
    $module = 'taxonomy_term_' . $row->tid;

    // Save the link, then delete the original.
    $new_links[$module] = $links[$module];
    unset($links[$module]);
  }

  // Now put the taxo links back in the new order.
  $links = array_merge($links, $new_links);

  // We need to destroy the table in case there are more nodes on the page.
  db_query("DROP TABLE {ti_link_alter}");
}

/**
 * Implementation of hook_menu.
 */
function taxonomy_image_link_alter_menu($may_cache) {
  $items = array();
  if ($may_cache) {

    // Add a tab to the Admin Settings
    $items[] = array(
      'path' => 'admin/settings/taxonomy_image/link_alter',
      'title' => 'Link Alter',
      'callback' => 'drupal_get_form',
      'callback arguments' => array(
        'taxonomy_image_link_alter_form',
      ),
      'access' => user_access('administer site configuration'),
      'description' => 'Configure Taxonomy_image Link_alter functionality.',
      'type' => MENU_LOCAL_TASK,
      'weight' => 1,
    );
  }
  return $items;
}
function taxonomy_image_link_alter_form() {
  drupal_add_css(drupal_get_path('module', 'taxonomy_image') . '/taxonomy_image.css');
  $form = array();
  $form['taxonomy_image_link_types'] = array(
    '#type' => 'checkboxes',
    '#title' => t('Select content types to alter links'),
    '#options' => array_map('check_plain', node_get_types('names')),
    '#default_value' => variable_get('taxonomy_image_link_types', array()),
    '#description' => t('For the selected content types, the taxonomy links will use taxonomy images if they are available.'),
    '#prefix' => '<div class="taxonomy_image_checkboxes">',
    '#suffix' => '</div>',
    '#weight' => -3,
  );
  $form['taxonomy_image_link_show_name'] = array(
    '#type' => 'radios',
    '#title' => t('Link style'),
    '#options' => array(
      0 => t('Image only'),
      1 => t('Image and name'),
    ),
    '#default_value' => variable_get('taxonomy_image_link_show_name', 0),
    '#description' => t('For the selected content types, this determines how the taxonomy links will be displayed.'),
    '#prefix' => '<div class="taxonomy_image_radios">',
    '#suffix' => '</div>',
  );
  $sort_options = array(
    0 => 'No sort',
    1 => 'Alphabetically',
    2 => 'By ID',
  );
  $form['taxonomy_image_link_sort_links'] = array(
    '#type' => 'radios',
    '#options' => $sort_options,
    '#title' => t('Sort links'),
    '#default_value' => variable_get('taxonomy_image_link_sort_links', 0),
    '#description' => t('Do you want the links reordered? If selected, vocabulary and term weight will be most important.
      "Alphabetically" will sort the vocabularies and terms by name;
      "By ID" will sort the vocabularies and terms by their IDs.'),
    '#prefix' => '<div class="taxonomy_image_radios">',
    '#suffix' => '</div>',
  );
  if (module_exists('imagecache')) {
    $form['taxonomy_image_link_preset'] = array(
      '#type' => 'radios',
      '#title' => t('Imagecache Preset'),
      '#options' => drupal_map_assoc(_taxonomy_image_presets()),
      '#default_value' => variable_get('taxonomy_image_link_preset', 'ORIGINAL'),
      '#prefix' => '<div class="taxonomy_image_radios">',
      '#suffix' => '</div><div class="clear-block"></div>',
    );
  }
  return system_settings_form($form);
}

Functions

Name	Description
taxonomy_image_link_alter	Implement hook_link_alter to picturize the taxonomy term links
taxonomy_image_link_alter_form
taxonomy_image_link_alter_menu	Implementation of hook_menu.