<?php

// $Id: taxonomy.pages.inc,v 1.9.2.1 2009/04/27 11:49:05 goba Exp $

/**

 * @file

 * Page callbacks for the taxonomy module.

 */

/**

 * Menu callback; displays all nodes associated with a term.

 */

function taxonomy_term_page($str_tids = '', $depth = 0, $op = 'page') {

  $terms = taxonomy_terms_parse_string($str_tids);

  if ($terms['operator'] != 'and' && $terms['operator'] != 'or') {

    drupal_not_found();

  }

  if ($terms['tids']) {

    $result = db_query(db_rewrite_sql('SELECT t.tid, t.name FROM {term_data} t WHERE t.tid IN ('. db_placeholders($terms['tids']) .')', 't', 'tid'), $terms['tids']);

    $tids = array(); // we rebuild the $tids-array so it only contains terms the user has access to.

    $names = array();

    while ($term = db_fetch_object($result)) {

      $tids[] = $term->tid;

      $names[] = $term->name;

    }

    if ($names) {

      $title = implode(', ', $names);

      drupal_set_title(check_plain($title));

      switch ($op) {

        case 'page':

          // Build breadcrumb based on first hierarchy of first term:

          $current->tid = $tids[0];

          $breadcrumb = array();

          while ($parents = taxonomy_get_parents($current->tid)) {

            $current = array_shift($parents);

            $breadcrumb[] = l($current->name, 'taxonomy/term/'. $current->tid);

          }

          $breadcrumb[] = l(t('Home'), NULL);

          $breadcrumb = array_reverse($breadcrumb);

          drupal_set_breadcrumb($breadcrumb);

          $output = theme('taxonomy_term_page', $tids, taxonomy_select_nodes($tids, $terms['operator'], $depth, TRUE));

          drupal_add_feed(url('taxonomy/term/'. $str_tids .'/'. $depth .'/feed'), 'RSS - '. $title);

          return $output;

          break;

        case 'feed':

          $channel['link'] = url('taxonomy/term/'. $str_tids .'/'. $depth, array('absolute' => TRUE));

          $channel['title'] = variable_get('site_name', 'Drupal') .' - '. $title;

          // Only display the description if we have a single term, to avoid clutter and confusion.

          if (count($tids) == 1) {

            $term = taxonomy_get_term($tids[0]);

            // HTML will be removed from feed description, so no need to filter here.

            $channel['description'] = $term->description;

          }

          $result = taxonomy_select_nodes($tids, $terms['operator'], $depth, FALSE);

          $items = array(); 

          while ($row = db_fetch_object($result)) {

            $items[] = $row->nid;

          }

          node_feed($items, $channel);

          break;

        default:

          drupal_not_found();

      }

    }

    else {

      drupal_not_found();

    }

  }

}

/**

 * Render a taxonomy term page HTML output.

 *

 * @param $tids

 *   An array of term ids.

 * @param $result

 *   A pager_query() result, such as that performed by taxonomy_select_nodes().

 *

 * @ingroup themeable

 */

function theme_taxonomy_term_page($tids, $result) {

  drupal_add_css(drupal_get_path('module', 'taxonomy') .'/taxonomy.css');

  $output = '';

  // Only display the description if we have a single term, to avoid clutter and confusion.

  if (count($tids) == 1) {

    $term = taxonomy_get_term($tids[0]);

    $description = $term->description;

    // Check that a description is set.

    if (!empty($description)) {

      $output .= '<div class="taxonomy-term-description">';

      $output .= filter_xss_admin($description);

      $output .= '</div>';

    }

  }

  $output .= taxonomy_render_nodes($result);

  return $output;

}

/**

 * Helper function for autocompletion

 */

function taxonomy_autocomplete($vid, $string = '') {

  // The user enters a comma-separated list of tags. We only autocomplete the last tag.

  $array = drupal_explode_tags($string);

  // Fetch last tag

  $last_string = trim(array_pop($array));

  $matches = array();

  if ($last_string != '') {

    $result = db_query_range(db_rewrite_sql("SELECT t.tid, t.name FROM {term_data} t WHERE t.vid = %d AND LOWER(t.name) LIKE LOWER('%%%s%%')", 't', 'tid'), $vid, $last_string, 0, 10);

    $prefix = count($array) ? implode(', ', $array) .', ' : '';

    while ($tag = db_fetch_object($result)) {

      $n = $tag->name;

      // Commas and quotes in terms are special cases, so encode 'em.

      if (strpos($tag->name, ',') !== FALSE || strpos($tag->name, '"') !== FALSE) {

        $n = '"'. str_replace('"', '""', $tag->name) .'"';

      }

      $matches[$prefix . $n] = check_plain($tag->name);

    }

  }

  drupal_json($matches);

}