taxonomy.module 36.5 KB
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<?php
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// $Id$
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function taxonomy_feed($taxonomy) {
  global $id, $type;
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  if ($type == "voc") {
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    //TODO - vocabulary feed.
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  }
  else {
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    $result = taxonomy_select_nodes($taxonomy, 0);
    $term = taxonomy_get_term($taxonomy->tids[0]);
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    $channel["link"] = url("taxonomy/view/$taxonomy->operator/$taxonomy->str_tids", NULL, NULL, TRUE);
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    $channel["title"] = variable_get("site_name", "drupal") ." - ". $term->name;
    $channel["description"] = $term->description;
    node_feed($result, $channel);
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  }
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}
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function taxonomy_perm() {
  return array("administer taxonomy");
}
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function taxonomy_link($type, $node = NULL) {
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  if ($type == "system") {
    if (user_access("administer taxonomy")) {
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      menu("admin/taxonomy", t("categories"), "taxonomy_admin", 3);
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      menu("admin/taxonomy/add/vocabulary", t("create new vocabulary"), "taxonomy_admin");
      menu("admin/taxonomy/help", t("help"), "taxonomy_admin", 9);
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    }
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    if (user_access("access content")) {
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      menu("taxonomy", t("taxonomy"), "taxonomy_page", 0, MENU_HIDE, MENU_LOCKED);
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    }
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  }
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  else if ($type == "taxonomy terms" && $node != NULL) {
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    $links = array();
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    if ($node->taxonomy) {
      foreach ($node->taxonomy as $tid) {
        $term = taxonomy_get_term($tid);
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        $links[] = l($term->name, "taxonomy/page/or/$term->tid");
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      }
    }
    else {

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    /*
    ** Themes can print taxonomy links with:
    **
    ** if (module_exist("taxonomy")) {
    **   $this->links(taxonomy_link("taxonomy terms", $node));
    ** }
    */

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      $links = array();
      foreach (taxonomy_node_get_terms($node->nid) as $term) {
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        $links[] = l($term->name, "taxonomy/page/or/$term->tid");
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      }
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    }
    return $links;
  }
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}

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/*
** admin pages (form, save, overview)
*/

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function taxonomy_form_vocabulary($edit = array()) {
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  foreach (node_list() as $type) {
    $nodetypes[$type] = node_invoke($type, "node_name");
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  }
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  $form .= form_textfield(t("Vocabulary name"), "name", $edit["name"], 50, 64, t("Required") .". ". t("The name for this vocabulary.  Example: 'Topic'") .".");
  $form .= form_textarea(t("Description"), "description", $edit["description"], 60, 5, t("Optional") .". ". t("Description of the vocabulary, can be used by modules."));
  $form .= form_select(t("Types"), "nodes", explode(",", $edit["nodes"]), $nodetypes, t("Required") .". ". t("A list of node types you want to associate this vocabulary with."), "", 1);
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  $form .= form_checkbox(t("Related terms"), "relations", 1, $edit["relations"], t("Optional") .". ". t("Allows <a href=\"%help-url\">related terms</a> in this vocabulary.", array("%help-url" => url("admin/taxonomy/help", NULL, NULL, "related-terms"))));
  $form .= form_radios(t("Hierarchy"), "hierarchy", $edit["hierarchy"], array(t("Disabled"), t("Single"), t("Multiple")), t("Optional") .". ". t("Allows <a href=\"%help-url\">a tree-like hierarchy</a> between terms of this vocabulary.", array("%help-url" => url("admin/taxonomy/help", NULL, NULL, "hierarchy"))), "", 0);
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  $form .= form_checkbox(t("Multiple select"), "multiple", 1, $edit["multiple"], t("Optional") .". ". t("Allows nodes to have more than one term in this vocabulary."));
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  $form .= form_checkbox(t("Required"), "required", 1, $edit["required"], t("If enabled every node <strong>must</strong> have at least one term in this vocabulary"));
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  $form .= form_weight(t("Weight"), "weight", $edit["weight"], 10, t("Optional. In listings, the heavier vocabularies will sink and the lighter vocabularies will be positioned nearer the top."));
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  $form .= form_submit(t("Submit"));
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  if ($edit["vid"]) {
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    $form .= form_submit(t("Delete"));
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    $form .= form_hidden("vid", $edit["vid"]);
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  }

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  return form($form);
}
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function taxonomy_save_vocabulary($edit) {
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  if (!$edit["nodes"]) {
    $edit["nodes"] = array();
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  }

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  $data = array("name" => $edit["name"], "nodes" => implode(",", $edit["nodes"]), "description" => $edit["description"], "multiple" => $edit["multiple"], "required" => $edit["required"], "hierarchy" => $edit["hierarchy"], "relations" => $edit["relations"], "weight" => $edit["weight"]);
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  if ($edit["vid"] && $edit["name"]) {
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    db_query("UPDATE {vocabulary} SET ". _prepare_update($data) ." WHERE vid = %d", $edit["vid"]);
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    module_invoke_all("taxonomy", "update", "vocabulary", $edit);
    $message = t("updated vocabulary '%name'.", array("%name" => $edit["name"]));
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  }
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  else if ($edit["vid"]) {
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    $message = taxonomy_del_vocabulary($edit["vid"]);
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  }
  else {
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    $data["vid"] = $edit["vid"] = db_next_id("{vocabulary}_vid");
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    db_query("INSERT INTO {vocabulary} ". _prepare_insert($data, 1) ." VALUES ". _prepare_insert($data, 2));
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    module_invoke_all("taxonomy", "insert", "vocabulary", $edit);
    $message = t("created new vocabulary '%name'.", array("%name" => $edit["name"]));
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  }
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  cache_clear_all();
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  drupal_set_message($message);
  return $edit;
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}
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function taxonomy_del_vocabulary($vid) {
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  $vocabulary = taxonomy_get_vocabulary($vid);

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  db_query("DELETE FROM {vocabulary} WHERE vid = %d", $vid);
  $result = db_query("SELECT tid FROM {term_data} WHERE vid = %d", $vid);
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  while ($term = db_fetch_object($result)) {
    taxonomy_del_term($term->tid);
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  }
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  module_invoke_all("taxonomy", "delete", "vocabulary", $vocabulary);

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  cache_clear_all();

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  return t("deleted vocabulary '%name'.", array("%name" => $vocabulary->name));
}

function _taxonomy_confirm_del_vocabulary($vid) {
  $vocabulary = taxonomy_get_vocabulary($vid);

  $form .= form_hidden("confirm", 1);
  $form .= form_hidden("type", "vocabulary");
  $form .= form_hidden("vid", $vid);
  $form .= form_submit(t("Delete"));
  $form .= form_submit(t("Cancel"));

  return form(form_item(t("Delete vocabulary '%name'", array("%name" => $vocabulary->name)), $form, t("Are you sure you want to delete the vocabulary and all its terms?")));
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}
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function taxonomy_form_term($edit = array()) {
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  $vocabulary_id = isset($edit["vid"]) ? $edit["vid"] : arg(4);
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  $vocabulary = taxonomy_get_vocabulary($vocabulary_id);
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  $form = form_textfield(t("Term name"), "name", $edit["name"], 50, 64, t("Required") .". ". t("The name for this term.  Example: 'Linux'."));
  $form .= form_textarea(t("Description"), "description", $edit["description"], 60, 5, t("Optional") .". ". t("A description of the term."));
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  if ($vocabulary->hierarchy) {
    $parent = array_keys(taxonomy_get_parents($edit["tid"]));
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    $children = taxonomy_get_tree($vocabulary_id, $edit["tid"]);
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    // you can't be son of yourself nor of your children
    foreach ($children as $child) {
      $exclude[] = $child->tid;
    }
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    $exclude[] = $edit["tid"];
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    if ($vocabulary->hierarchy == 1) {
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      $form .= _taxonomy_term_select(t("Parent"), "parent", $parent, $vocabulary_id, t("Required") .". ". l(t("Parent term"), "admin/taxonomy/help", NULL, NULL, "parent") .".", 0, "<". t("root") .">", $exclude);
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    }
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    elseif ($vocabulary->hierarchy == 2) {
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      $form .= _taxonomy_term_select(t("Parents"), "parent", $parent, $vocabulary_id, t("Required") .". ". l(t("Parent terms"), "admin/taxonomy/help", NULL, NULL, "parent") .".", 1, "<". t("root") .">", $exclude);
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    }
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  }
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  if ($vocabulary->relations) {
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    $form .= _taxonomy_term_select(t("Related terms"), "relations", array_keys(taxonomy_get_related($edit["tid"])), $vocabulary_id, t("Optional") .". ", 1, "<". t("none") .">", array($edit["tid"]));
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  }

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  $form .= form_textarea(t("Synonyms"), "synonyms", implode("\n", taxonomy_get_synonyms($edit["tid"])), 30, 5, t("Optional") . ". ". t("<a href=\"%help-url\">Synonyms</a> of this term, one synonym per line.", array("%help-url" => url("admin/taxonomy/help", NULL, NULL, "synonyms"))));
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  $form .= form_weight(t("Weight"), "weight", $edit["weight"], 10, t("Optional. In listings, the heavier terms will sink and the lighter terms will be positioned nearer the top."));
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  $form .= form_hidden("vid", $vocabulary->vid);
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  $form .= form_submit(t("Submit"));
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  if ($edit["tid"]) {
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    $form .= form_submit(t("Delete"));
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    $form .= form_hidden("tid", $edit["tid"]);
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  }

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  return form($form);
}
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function taxonomy_save_term($edit) {
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  if ($edit["tid"] && $edit["name"]) {
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    $data = array("name" => $edit["name"], "description" => $edit["description"], "weight" => $edit["weight"]);
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    db_query("UPDATE {term_data} SET ". _prepare_update($data) ." WHERE tid = %d", $edit["tid"]);
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    module_invoke_all("taxonomy", "update", "term", $edit);
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    $message = t("the term '%a' has been updated.", array("%a" => $edit["name"]));
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  }
  else if ($edit["tid"]) {
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    return taxonomy_del_term($edit["tid"]);
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  }
  else {
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    $edit["tid"] = db_next_id("{term_data}_tid");
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    $data = array("tid" => $edit["tid"], "name" => $edit["name"], "description" => $edit["description"], "vid" => $edit["vid"], "weight" => $edit["weight"]);
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    db_query("INSERT INTO {term_data} ". _prepare_insert($data, 1) ." VALUES ". _prepare_insert($data, 2));
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    module_invoke_all("taxonomy", "insert", "term", $edit);
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    $message = t("created new term '%name'.", array("%name" => $edit["name"]));
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  }
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  // relations (seem very powerful, but I have to understand it completely)
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  db_query("DELETE FROM {term_relation} WHERE tid1 = %d OR tid2 = %d", $edit["tid"], $edit["tid"]);
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  if ($edit["relations"]) {
    foreach ($edit["relations"] as $related_id) {
      if ($related_id != 0) {
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        db_query("INSERT INTO {term_relation} (tid1, tid2) VALUES (%d, %d)", $edit["tid"], $related_id);
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      }
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    }
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  }
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  // hierarchy
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  db_query("DELETE FROM {term_hierarchy} WHERE tid = %d", $edit["tid"]);
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  if (!isset($edit["parent"])) {
    $edit["parent"] = 0;
  }
  if (is_array($edit["parent"])) {
    foreach ($edit["parent"] as $parent) {
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      db_query("INSERT INTO {term_hierarchy} (tid, parent) VALUES (%d, %d)", $edit["tid"], $parent);
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    }
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  }
  else {
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    db_query("INSERT INTO {term_hierarchy} (tid, parent) VALUES (%d, %d)", $edit["tid"], $edit["parent"][0]);
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  }

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  db_query("DELETE FROM {term_synonym} WHERE tid = %d", $edit["tid"]);
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  if ($edit["synonyms"]) {
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    foreach (explode ("\n", str_replace("\r", "", $edit["synonyms"])) as $synonym) {
      if ($synonym) {
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        db_query("INSERT INTO {term_synonym} (tid, name) VALUES (%d, '%s')", $edit["tid"], chop($synonym));
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      }
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    }
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  }
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  cache_clear_all();

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  drupal_set_message($message);
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  return $edit;
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}
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function taxonomy_del_term($tid) {
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  $term = taxonomy_get_term($tid);

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  db_query("DELETE FROM {term_data} WHERE tid = %d", $tid);
  db_query("DELETE FROM {term_hierarchy} WHERE tid = %d", $tid);
  db_query("DELETE FROM {term_relation} WHERE tid1 = %d OR tid2 = %d", $tid, $tid);
  db_query("DELETE FROM {term_synonym} WHERE tid = %d", $tid);
  db_query("DELETE FROM {term_node} WHERE tid = %d", $tid);
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  module_invoke_all("taxonomy", "delete", "term", $term);
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  cache_clear_all();

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  return t("deleted term '%name'.", array("%name" => $term->name));
}

function _taxonomy_confirm_del_term($tid) {
  $term = taxonomy_get_term($tid);

  $form .= form_hidden("confirm", 1);
  $form .= form_hidden("type", "term");
  $form .= form_hidden("tid", $tid);
  $form .= form_submit(t("Delete"));
  $form .= form_submit(t("Cancel"));

  return form(form_item(t("Delete term '%name'", array("%name" => $term->name)), $form, t("Are you sure you want to delete the term?")));
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}
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function taxonomy_overview() {
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  $output .= "<h3>". t("Vocabularies overview") ."</h3>";
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  $header = array(t("name"), t("node types"), array("data" => t("operations"), "colspan" => 3));
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  $vocabularies = taxonomy_get_vocabularies();
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  foreach ($vocabularies as $vocabulary) {
    $links = array();
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    $types = array();
    foreach(explode(",", $vocabulary->nodes) as $type) {
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      $types[] = node_invoke($type, "node_name");
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    }
    $rows[] = array($vocabulary->name, array("data" => implode(", ", $types), "align" => "center"), l(t("edit vocabulary"), "admin/taxonomy/edit/vocabulary/$vocabulary->vid"), l(t("add term"), "admin/taxonomy/add/term/$vocabulary->vid"), l(t("preview form"), "admin/taxonomy/preview/vocabulary/$vocabulary->vid"));
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    $tree = taxonomy_get_tree($vocabulary->vid);
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    if ($tree) {
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      unset($data);
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      foreach ($tree as $term) {
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        $data .= _taxonomy_depth($term->depth) ." ". $term->name ." (". l(t("edit term"), "admin/taxonomy/edit/term/$term->tid") .")<br />";
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      }
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      $rows[] = array(array("data" => $data, "colspan" => 5));
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    }
  }

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  return theme("table", $header, $rows);
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}

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function taxonomy_form($vocabulary_id, $value = 0, $error = array()) {
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  $vocabulary = taxonomy_get_vocabulary($vocabulary_id);
  if ($vocabulary->required) {
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    $descriptions = array(t("You must choose one term for this node."), t("You must choose one or more terms for this node."));
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    $blank = 0;
  }
  else {
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    $descriptions = array(t("You can choose one term for this node."), t("You can choose one or more terms for this node."));
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    $blank = "<". t("none") .">";
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  }
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  $multiple = intval($vocabulary->multiple);

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  $description = $descriptions[$multiple] . $error['taxonomy'];

  return _taxonomy_term_select($vocabulary->name, 'taxonomy', $value, $vocabulary_id, $description, $multiple, $blank);
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}
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/*
** API functions
*/

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// return array of vocabularies, as objects
function taxonomy_get_vocabularies($type = '', $key = "vid") {
  if ($type) {
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    $result = db_query("SELECT * FROM {vocabulary} WHERE nodes LIKE '%%%s%%' ORDER BY weight, name", $type);
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  }
  else {
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    $result = db_query("SELECT * FROM {vocabulary} ORDER BY weight, name");
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  }
  $vocabularies = array();
  while ($voc = db_fetch_object($result)) {
    $vocabularies[$voc->$key] = $voc;
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  }
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  return $vocabularies;
}
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// return form with current term
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function taxonomy_node_form($type, $node = '', $error = array()) {
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  if (!$node->taxonomy) {
    if ($node->nid) {
      $terms = array_keys(taxonomy_node_get_terms($node->nid));
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    }
    else {
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      $terms = 0;
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    }
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  }
  else {
    $terms = $node->taxonomy;
  }
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  $c = db_query("SELECT * FROM {vocabulary} WHERE nodes LIKE '%%%s%%' ORDER BY weight, name", $type);
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  while ($vocabulary = db_fetch_object($c)) {
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    $result[] .= taxonomy_form($vocabulary->vid, $terms, $error);
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  }
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  return $result ? $result : array();
}
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// return 1 if node identified by $nid contains a taxonomy term identified by $tid in his body or title
function taxonomy_node_has_term($nid, $tid) {
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  $term_name = db_result(db_query("SELECT name FROM {term_data} WHERE tid = %d", $tid));
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  return db_result(db_query("SELECT COUNT(n.nid) FROM {node} n WHERE n.nid = %d AND ((n.body LIKE '%%%s%%') OR (n.body LIKE '%%%s%%'))", $nid, $term_name, $term_name));
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}

// return array of terms of a node beloging to a particular vocabulary identified by $vid
function taxonomy_node_get_terms_by_vocabulary($nid, $vid, $key = "tid") {
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  $result = db_query("SELECT t.* FROM {term_data} t, {term_node} r WHERE t.tid = r.tid AND t.vid = %d AND r.nid = %d ORDER BY weight", $vid, $nid);
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  $terms = array();
  while ($term = db_fetch_object($result)) {
    $terms[$term->$key] = $term;
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  }
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  return $terms;
}

// return array of terms of a node
function taxonomy_node_get_terms($nid, $key = "tid") {
  static $terms;
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  if (!isset($terms[$nid])) {
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    $result = db_query("SELECT t.* FROM {term_data} t, {term_node} r WHERE r.tid = t.tid AND r.nid = %d ORDER BY weight, name", $nid);
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    $terms[$nid] = array();
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    while ($term = db_fetch_object($result)) {
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      $terms[$nid][$term->$key] = $term;
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    }
  }
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  return $terms[$nid];
}
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// save terms of a node
function taxonomy_node_save($nid, $terms) {
  taxonomy_node_delete($nid);
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  if ($terms) {
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    foreach ($terms as $term) {
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      db_query("INSERT INTO {term_node} (nid, tid) VALUES (%d, %d)", $nid, $term);
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    }
  }
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}
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// clean up terms
function taxonomy_node_delete($nid) {
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  db_query("DELETE FROM {term_node} WHERE nid = %d", $nid);
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}
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// relations: return array of related terms
function taxonomy_get_related($tid, $key = "tid") {
  if ($tid) {
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    $result = db_query("SELECT t.*, tid1, tid2 FROM {term_relation} , {term_data} t WHERE (t.tid = tid1 OR t.tid = tid2) AND (tid1 = %d OR tid2 = %d) AND t.tid != %d ORDER BY weight, name", $tid, $tid, $tid);
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    $related = array();
    while ($term = db_fetch_object($result)) {
      $related[$term->$key] = $term;
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    }
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    return $related;
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  }
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  else {
    return array();
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  }
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}
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// hierarchy: get parent terms
function taxonomy_get_parents($tid, $key = "tid") {
  if ($tid) {
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    $result = db_query("SELECT t.* FROM {term_hierarchy} h, {term_data} t WHERE h.parent = t.tid AND h.tid = %d ORDER BY weight, name", $tid);
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    $parents = array();
    while ($parent = db_fetch_object($result)) {
      $parents[$parent->$key] = $parent;
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    }
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    return $parents;
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  }
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  else {
    return array();
  }
}
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// Gets all parents, parents of parents, etc.
function taxonomy_get_parents_all($tid, $key = "tid") {
  $parents = array();
  if ($tid) {
    $parents[] = taxonomy_get_term($tid);
    $n = 0;
    while ($parent = taxonomy_get_parents($parents[$n]->tid)) {
      $parents = array_merge($parents, $parent);
      $n++;
    }
  }
  return $parents;
}

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// hierarchy: get children
function taxonomy_get_children($tid, $vid = 0, $key = "tid") {
  if ($vid) {
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    $result = db_query("SELECT t.* FROM {term_hierarchy} h, {term_data} t WHERE t.vid = %d AND h.tid = t.tid AND h.parent = %d ORDER BY weight, name", $vid, $tid);
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  }
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  else {
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    $result = db_query("SELECT t.* FROM {term_hierarchy} h, {term_data} t WHERE h.tid = t.tid AND parent = %d ORDER BY weight", $tid);
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  }
  $children = array();
  while ($term = db_fetch_object($result)) {
    $children[$term->$key] = $term;
  }
  return $children;
}
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// hierarchy: get whole family, with tid, parent and depth; useful to show
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function taxonomy_get_tree($vocabulary_id, $parent = 0, $depth = -1, $key = "tid") {
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  static $children, $parents, $terms;
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  $depth++;
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  // we cache trees, so it's not cpu-intensive to call get_tree on a term and its children too
  if (!isset($children[$vocabulary_id])) {
    $children[$vocabulary_id] = array();

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    $result = db_query("SELECT t.*, parent FROM {term_data} t, {term_hierarchy} h WHERE t.tid = h.tid AND t.vid = %d ORDER BY weight, name", $vocabulary_id);
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    while ($term = db_fetch_object($result)) {
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      $children[$vocabulary_id][$term->parent][] = $term->tid;
      $parents[$vocabulary_id][$term->tid][] = $term->parent;
      $terms[$vocabulary_id][$term->tid] = $term;
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    }
  }
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  if ($children[$vocabulary_id][$parent]) {
    foreach ($children[$vocabulary_id][$parent] as $child) {
      $terms[$vocabulary_id][$child]->depth = $depth;
      unset($terms[$vocabulary_id][$child]->parent); // this is not useful as it would show one parent only
      $terms[$vocabulary_id][$child]->parents = $parents[$vocabulary_id][$child];
      $tree[] = $terms[$vocabulary_id][$child];
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      $tree = array_merge($tree, taxonomy_get_tree($vocabulary_id, $child, $depth));
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    }
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  }
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  return $tree ? $tree : array();
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}
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// synonyms: return array of synonyms
function taxonomy_get_synonyms($tid) {
  if ($tid) {
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    $result = db_query("SELECT name FROM {term_synonym} WHERE tid = %d", $tid);
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    while ($synonym = db_fetch_array($result)) {
      $synonyms[] = $synonym["name"];
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    }
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    return $synonyms ? $synonyms : array();
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  }
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  else {
    return array();
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  }
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}
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// synonyms: return original term
function taxonomy_get_synonym_root($term) {
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  return db_fetch_object(db_query("SELECT * FROM {term_synonym} s, {term_data} t WHERE t.tid = s.tid AND s.name = '%s'", $term));
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}
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// given a term id, count number of published nodes in it
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function taxonomy_term_count_nodes($tid, $type = 0) {
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  static $count;
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  if (!isset($count[$type])) {
    // $type == 0 always evaluates true is $type is a string
    if (is_numeric($type)) {
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      $result = db_query("SELECT t.tid, COUNT(*) AS c FROM {term_node} t INNER JOIN {node} n ON t.nid = n.nid WHERE n.status = 1 GROUP BY t.tid");
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    }
    else {
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      $result = db_query("SELECT t.tid, COUNT(*) AS c FROM {term_node} t, {node} n WHERE t.nid = n.nid AND n.status = 1 AND n.type = '%s' GROUP BY t.tid", $type);
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    }
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    while ($term = db_fetch_object($result)) {
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      $count[$type][$term->tid] = $term->c;
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    }
  }

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  foreach (_taxonomy_term_children($tid) as $c) {
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    $children_count += taxonomy_term_count_nodes($c, $type);
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  }
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  return $count[$type][$tid] + $children_count;
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}

// helper for above function
function _taxonomy_term_children($tid) {
  static $children;
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  if (!isset($children)) {
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    $result = db_query("SELECT tid, parent FROM {term_hierarchy} ");
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    while ($term = db_fetch_object($result)) {
      $children[$term->parent][] = $term->tid;
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    }
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  }
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  return $children[$tid] ? $children[$tid] : array();
}
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/**
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 * Try to map a string to existing vocabularies. Provide case insensitive and
 * trimmed map so as to maximize likelihood of successful mapping.
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 *
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 * @param $name Name of the vocabulary to search
 * @return array of matching vocabularies, as objects
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 */
function taxonomy_get_vocabulary_by_name($name) {
  // LOWER is ANSI SQL-92
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  $db_result = db_query("SELECT * FROM {vocabulary} WHERE LOWER('%s') LIKE LOWER(name)", trim($name));
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  $result = array();
  while ($vocabulary = db_fetch_object($db_result)) {
    $result[] = $vocabulary;
  }

  return $result;
}

/**
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 * Try to map a string to existing terms Provide case insensitive and trimmed
 * map so as to maximize likelihood of successful mapping.
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 *
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 * @param name Name of the term to search
 * @return rray of matching terms, as objects
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 */
function taxonomy_get_term_by_name($name) {
  // LOWER is ANSI SQL-92
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  $db_result = db_query("SELECT * FROM {term_data} WHERE LOWER('%s') LIKE LOWER(name)", trim($name));
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  $result = array();
  while ($term = db_fetch_object($db_result)) {
    $result[] = $term;
  }

  return $result;
}

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function taxonomy_get_vocabulary($vid) {
  // simple cache using a static var?
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  return db_fetch_object(db_query("SELECT * FROM {vocabulary} WHERE vid = %d", $vid));
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}
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function taxonomy_get_term($tid) {
  // simple cache using a static var?
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  return db_fetch_object(db_query("SELECT * FROM {term_data} WHERE tid = %d", $tid));
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}
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/*
** service functions
*/

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function _taxonomy_term_select($title, $name, $value, $vocabulary_id, $description, $multiple, $blank, $exclude = array()) {
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  $tree = taxonomy_get_tree($vocabulary_id);
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  if ($blank) {
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    $options[] = array("tid" => 0, "name" => $blank);
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  }
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  if ($tree) {
    foreach ($tree as $term) {
      if (!in_array($term->tid, $exclude)) {
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        $options[] = array("tid" => $term->tid, "name" => _taxonomy_depth($term->depth, '-').$term->name);
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      }
    }
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    if (!$blank && !$value) {
      // required but without a predefined value, so set first as predefined
      $value = $tree[0]->tid;
    }
  }
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  if (count($options) > 0) {
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    foreach ($options as $option) {
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      $select .= "<option value=\"". $option["tid"] ."\"". (is_array($value) ? (in_array($option["tid"], $value) ? " selected=\"selected\"" : "") : ($option["tid"] == $value ? " selected=\"selected\"" : "")) .">". check_form($option["name"]) ."</option>";
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    }
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    $size = min(12, count($options));
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    return form_item($title, "<select name=\"edit[$name][]\"". ($multiple ? " multiple=\"multiple\" size=\"$size\"" : "") . ($extra ? " $extra" : "") .">$select</select>", $description);
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  }
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}
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function _taxonomy_depth($depth, $graphic = '--') {
  for ($n = 0; $n < $depth; $n++) {
    $result .= $graphic;
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  }
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  return $result;
}
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function _prepare_update($data) {
  foreach ($data as $key => $value) {
    $q[] = "$key = '". check_query($value) ."'";
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  }
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  $result = implode(", ", $q);
  return $result;
}
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function _prepare_insert($data, $stage) {
  if ($stage == 1) {
    $result = implode(", ", array_keys($data));
  }
  else {
    foreach (array_values($data) as $value) {
      $q[] = "'". check_query($value) ."'";
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    }
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    $result = implode(", ", $q);
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  }
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  return "($result)";
}
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/*
** Accepts taxonomy conditions and returns a resource identifier.  If
** you intend to use the nodes without a pager (eg. in a XML feed),
** then set $pager to false.
*/
function taxonomy_select_nodes($taxonomy, $pager = 1) {
  global $user;

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  if ($taxonomy->str_tids) {
    if ($taxonomy->operator == "or") {
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      $sql = "SELECT DISTINCT(n.nid), n.title, n.type, n.created, n.changed, n.uid, n.static, n.created, u.name FROM {node} n INNER JOIN {term_node} r ON n.nid = r.nid INNER JOIN {users} u ON n.uid = u.uid WHERE r.tid IN ($taxonomy->str_tids) AND n.status = '1' ORDER BY static DESC, created DESC";
      $sql_count = "SELECT COUNT(DISTINCT(n.nid)) FROM {node} n INNER JOIN {term_node} r ON n.nid = r.nid INNER JOIN {users} u ON n.uid = u.uid WHERE r.tid IN ($taxonomy->str_tids) AND n.status = '1'";
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    }
    else {
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      $sql = "SELECT n.nid, n.title, n.type, n.created, n.changed, n.uid, u.name FROM {node} n INNER JOIN {term_node} r ON n.nid = r.nid INNER JOIN {users} u ON n.uid = u.uid WHERE r.tid IN ($taxonomy->str_tids) AND n.status = '1' GROUP BY n.nid, n.title, n.type, n.created, n.changed, n.uid, u.name HAVING COUNT(n.nid) = ". count($taxonomy->tids) ." ORDER BY static DESC, created DESC";
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      // Special trick as we could not find anything better:
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      $count = db_num_rows(db_query("SELECT n.nid FROM {node} n INNER JOIN {term_node} r ON n.nid = r.nid WHERE r.tid IN ($taxonomy->str_tids) AND n.status = '1' GROUP BY n.nid HAVING COUNT(n.nid) = ". count($taxonomy->tids)));
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      $sql_count = "SELECT $count";
    }
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    if ($pager) {
      $result = pager_query($sql, variable_get("default_nodes_main", 10) , 0, $sql_count);
    }
    else {
      $result = db_query_range($sql, 0, 15);
    }
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  }

  return $result;
}

/*
** Accepts the result of a db_query() and formats each node along
** with a pager.
*/
function taxonomy_render_nodes($result) {

  while ($node = db_fetch_object($result)) {
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    $output .= node_view(node_load(array("nid" => $node->nid, "type" => $node->type)), 1);
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  }
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  $output .= theme("pager", NULL, variable_get("default_nodes_main", 10), 0);
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  return $output;
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}

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function taxonomy_nodeapi($node, $op, $arg = 0) {

  switch ($op) {
    case "insert":
      taxonomy_node_save($node->nid, $node->taxonomy);
      break;
    case "update":
      taxonomy_node_save($node->nid, $node->taxonomy);
      break;
    case "delete":
      taxonomy_node_delete($node->nid);
      break;
  }
}

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function taxonomy_page() {
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  $taxonomy->operator = arg(2);
  $taxonomy->str_tids = check_query(arg(3));
  $taxonomy->tids = explode(",", $taxonomy->str_tids);
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  if (ereg("^([0-9]+,){0,}[0-9]+$", $taxonomy->str_tids)) {
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    switch (arg(1)) {
      case "feed":
        taxonomy_feed($taxonomy);
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      break;
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      default:
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      // Build title:
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      $sql = 'SELECT name FROM {term_data} WHERE tid IN (%s)';
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      $result = db_query($sql, $taxonomy->str_tids);
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      $names = array();