<?php
// $Id: xmlsitemap_taxonomy.module,v 1.1.2.25 2010-03-02 17:41:47 davereid Exp $

/**
 * @file
 * Adds taxonomy terms to the sitemap.
 */

/**
 * @addtogroup xmlsitemap
 * @{
 */

/*****************************************************************************
 * Drupal hooks.
 ****************************************************************************/

/**
 * Implementation of hook_cron().
 */
function xmlsitemap_taxonomy_cron() {
  if (($limit = variable_get('xmlsitemap_cron_limit', 100)) != -1) {
    $sql = "SELECT t.tid, t.vid FROM {term_data} t
      LEFT JOIN {xmlsitemap_taxonomy} xt ON xt.tid = t.tid
      WHERE xt.tid IS NULL";
    $result = db_query_range($sql, 0, $limit);
    $sitemap_changed = FALSE;
    while ($term = db_fetch_object($result)) {
      $row = new stdClass();
      $row->tid = $term->tid;
      $row->vid = $term->vid;
      $row->changed = REQUEST_TIME;
      drupal_write_record('xmlsitemap_taxonomy', $row);
      $sitemap_changed = TRUE;
    }
    if ($sitemap_changed) {
      xmlsitemap_flag_sitemap();
    }
  }
}

/**
 * Implementation of hook_form_FORM_ID_alter().
 */
function xmlsitemap_taxonomy_form_taxonomy_form_term_alter(&$form, &$from_state) {
  if (!isset($form['identification'])) {
    // This same form is used for the term delete confirm form, so skip
    // adding our fieldset if that is the case.
    return;
  }

  $priority = db_result(db_query("SELECT priority_override
    FROM {xmlsitemap_taxonomy}
    WHERE tid = %d", $form['#term']['tid'])
  );
  if ($priority === FALSE) {
    $priority = -2.0;
  }
  $options = xmlsitemap_priority_options('both');
  $default = variable_get('xmlsitemap_taxonomy_vocabulary_priority_'. $form['vid']['#value'], '0.5');
  if (!isset($form['xmlsitemap'])) {
    $form['xmlsitemap'] = array(
      '#type' => 'fieldset',
      '#title' => t('XML sitemap'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
    );
  }
  $form['xmlsitemap']['xmlsitemap_taxonomy_priority'] = array(
    '#type' => 'select',
    '#title' => t('Priority'),
    '#description' => t('The default priority is %priority.', array('%priority' => $options[$default])),
    '#default_value' => $priority,
    '#options' => $options,
  );

  // The submit and delete buttons need to be weighted down.
  $form['submit'] += array('#weight' => 100);
  if (isset($form['delete'])) {
    $form['delete'] += array('#weight' => 110);
  }
}

/**
 * Implementation of hook_form_FORM_ID_alter().
 */
function xmlsitemap_taxonomy_form_taxonomy_form_vocabulary_alter(&$form, &$from_state) {
  $form['xmlsitemap'] = array(
    '#type' => 'fieldset',
    '#title' => t('XML sitemap'),
    '#collapsible' => TRUE,
  );
  $form['xmlsitemap']['xmlsitemap_taxonomy_vocabulary_priority'] = array(
    '#type' => 'select',
    '#title' => t('Priority'),
    '#description' => t('This will be the default priority of terms in this vocabulary.'),
    '#default_value' => variable_get('xmlsitemap_taxonomy_vocabulary_priority_'. $form['vid']['#value'], 0.5),
    '#options' => xmlsitemap_priority_options('exclude'),
  );
  $form['submit']['#weight'] = isset($form['submit']['#weight']) ? $form['submit']['#weight'] + 1 : 1;
  $form['delete']['#weight'] = isset($form['delete']['#weight']) ? $form['delete']['#weight'] + 2 : 2;
}

/**
 * Implementation of hook_nodeapi().
 */
function xmlsitemap_taxonomy_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  switch ($op) {
    case 'update':
      $terms = taxonomy_node_get_terms($node);
      foreach ($terms as $term) {
        $result = db_fetch_object(db_query("SELECT tid, changed, previously_changed, priority_override
          FROM {xmlsitemap_taxonomy}
          WHERE tid = %d", $term->tid));
        if ($result === FALSE) {
          $row = new stdClass();
          $row->tid = $term->tid;
          $row->vid = $term->vid;
          $row->changed = $node->changed;
          $row->previously_changed = $node->created;
        }
        else {
          $row = $result;
          if ($row->changed < $node->changed) {
            $row->previously_changed = $row->changed;
            $row->changed = $node->changed;
          }
        }
        drupal_write_record('xmlsitemap_taxonomy', $row, $result === FALSE ? NULL : 'tid');
        xmlsitemap_flag_sitemap();
      }
      break;
  }
}

/**
 * Implementation of hook_taxonomy().
 */

function xmlsitemap_taxonomy_taxonomy($op, $type, $array = NULL) {
  if ($type == 'vocabulary') {
    switch ($op) {
      case 'delete':
        db_query("DELETE FROM {xmlsitemap_taxonomy} WHERE vid = %d", $array['vid']);
        variable_del('xmlsitemap_taxonomy_vocabulary_priority_'. $array['vid']);
        xmlsitemap_flag_sitemap();
        break;
      case 'insert':
      case 'update':
        if (isset($array['vid']) && isset($array['xmlsitemap_taxonomy_vocabulary_priority'])) {
          if (variable_get('xmlsitemap_taxonomy_vocabulary_priority_'. $array['vid'], 0.5) != $array['xmlsitemap_taxonomy_vocabulary_priority']) {
            variable_set('xmlsitemap_taxonomy_vocabulary_priority_'. $array['vid'], $array['xmlsitemap_taxonomy_vocabulary_priority']);
            xmlsitemap_flag_sitemap();
          }
        }
        break;
    }
  }
  else {
    switch ($op) {
      case 'delete':
        db_query("DELETE FROM {xmlsitemap_taxonomy} WHERE tid = %d", $array['tid']);
        db_query("DELETE FROM {xmlsitemap} WHERE type = 'taxonomy' AND id = %d", $array['tid']);
        break;
      case 'insert':
        if (isset($array['tid']) && isset($array['vid'])) {
          $row = new stdClass();
          $row->tid = $array['tid'];
          $row->vid = $array['vid'];
          $row->changed = REQUEST_TIME;
          $row->priority_override = isset($array['xmlsitemap_taxonomy_priority']) ? $array['xmlsitemap_taxonomy_priority'] : -2.0;
          drupal_write_record('xmlsitemap_taxonomy', $row);
        }
        break;
      case 'update':
        $result = db_fetch_object(db_query("SELECT tid, vid, changed, previously_changed, priority_override
          FROM {xmlsitemap_taxonomy}
          WHERE tid = %d", $array['tid'])
        );
        if ($result === FALSE) {
          $row = new stdClass();
          $row->tid = $array['tid'];
          $row->vid = $array['vid'];
          $row->changed = REQUEST_TIME;
          $row->priority_override = isset($array['xmlsitemap_taxonomy_priority']) ? $array['xmlsitemap_taxonomy_priority'] : -2.0;
        }
        else {
          $row = $result;
          if (isset($array['xmlsitemap_taxonomy_priority'])) {
            $row->priority_override = $array['xmlsitemap_taxonomy_priority'];
          }
        }
        drupal_write_record('xmlsitemap_taxonomy', $row, $result === FALSE ? NULL : 'tid');
        break;
    }
    xmlsitemap_flag_sitemap();
  }
}

/**
 * Implementation of hook_xmlsitemap_description().
 */
function xmlsitemap_taxonomy_xmlsitemap_description() {
  return '<dt>'. t('XML sitemap taxonomy') .'</dt>'.
    '<dd>'. t('The module adds <a href="@terms">taxonomy terms</a> (categories) to the sitemap. The term default priority may be changed while adding or editing vocabularies and the term default priority can be overridden while adding or editing terms.', array('@terms' => url('admin/content/taxonomy'))) .'</dd>';
}

/**
 * Implementation of hook_xmlsitemap_links().
 */
function xmlsitemap_taxonomy_xmlsitemap_links() {
  $anon_account = drupal_anonymous_user();
  $user_access = user_access('access content', $anon_account);

  $result = db_query(
    db_rewrite_sql(
      "SELECT t.tid, t.vid, t.name, xt.changed, xt.previously_changed, xt.priority_override
        FROM {term_data} t
        LEFT JOIN {xmlsitemap_taxonomy} xt ON t.tid = xt.tid",
      't', 'tid'
    )
  );
  $row = new stdClass();
  $row->module = 'xmlsitemap_taxonomy';
  $row->type = 'taxonomy';
  while ($term = db_fetch_object($result)) {
    $row->loc = taxonomy_term_path($term);
    $row->id = $term->tid;
    $row->changed = $term->changed;
    $row->changefreq = max(REQUEST_TIME - $term->changed, empty($term->previously_changed) ? 0 : $term->changed - $term->previously_changed);
    if ($term->priority_override != -2.0) {
      $priority = $term->priority_override;
    }
    else {
      $priority = variable_get('xmlsitemap_taxonomy_vocabulary_priority_'. $term->vid, 0.5);
    }
    $row->priority = $user_access ? $priority == -1.0 ? $priority : min(max(round($priority, 1), 0.0), 1.0) : -1;
    $old_row = db_fetch_object(db_query("SELECT lid, type, priority FROM {xmlsitemap} WHERE loc = '%s'", $row->loc));
    if ($old_row === FALSE) {
      drupal_write_record('xmlsitemap', $row);
    }
    elseif ($old_row->type = 'taxonomy' && ($old_row->priority != $row->priority || $old_row->changed != $row->changed || $old_row->changefreq != $row->changefreq)) {
      $row->lid = $old_row->lid;
      drupal_write_record('xmlsitemap', $row, 'lid');
    }
  }
}

/**
 * @} End of "addtogroup xmlsitemap".
 */