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<?php
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// $Id: taxonomy_breadcrumb.inc,v 1.1 2009/01/12 02:19:26 mgn Exp $
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/**
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* @file
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* helper functions for taxonomy_breadcrumb
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*/
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/**
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* This function overrides the core taxonomy_term_page. First, call the core
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* taxonomy_term_page. Then, alter the breadcrumb trail. This module's
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* hook_menu and a module weight greater than taxonomy's ensure this
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* function gets called for the taxonomy/term path (the module weight is
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* in the system table and is set in taxonomy_breadcrumb.install).
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*/
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function _taxonomy_breadcrumb_term_page($str_tids = '', $depth = 0, $op = 'page') {
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// Include the .inc file with all helper functions
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require_once drupal_get_path('module', 'taxonomy') .'/taxonomy.pages.inc';
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// Call the core taxonomy_term_page function
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$output = taxonomy_term_page($str_tids, $depth, $op);
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// Use first term to generate breadcrumb trail
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$terms = taxonomy_terms_parse_string($str_tids);
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$breadcrumb = _taxonomy_breadcrumb_generate_breadcrumb($terms['tids'][0], TRUE);
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drupal_set_breadcrumb($breadcrumb);
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return $output;
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}
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/**
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* Return lightest term for given node ($nid).
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* Similar to taxonomy_node_get_terms, but only return the lightest term in the
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* lightest vocab for the node.
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*/
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function _taxonomy_breadcrumb_node_get_lightest_term($nid) {
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// We only want the first row of the result--this is the lightest term of the
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// lightest vocab. This query should be the same as the query found in
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// taxonomy_node_get_terms.
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$result = db_query(db_rewrite_sql('SELECT t.* FROM {term_node} r INNER JOIN {term_data} t ON r.tid = t.tid INNER JOIN {vocabulary} v ON t.vid = v.vid WHERE r.nid = %d ORDER BY v.weight, t.weight, t.name', 't', 'tid'), $nid);
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$term = db_fetch_object($result); // extract first row of query
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return $term;
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}
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/**
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* Return the administrator defined vocabulary path for a given vocabulary
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* ($vid). If a path doesn't exist, NULL is returned.
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*/
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function _taxonomy_breadcrumb_get_vocabulary_path($vid) {
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$result = db_query("SELECT path FROM {taxonomy_breadcrumb_vocabulary} WHERE vid = %d", $vid);
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$path = NULL;
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if ($row = db_fetch_array($result)) {
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$path = $row['path'];
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}
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return $path;
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}
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/**
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* Return the administrator defined term path for a given term ($tid).
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* If a path doesn't exist, NULL is returned.
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*/
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function _taxonomy_breadcrumb_get_term_path($tid) {
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$result = db_query("SELECT path FROM {taxonomy_breadcrumb_term} WHERE tid = %d", $tid);
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$path = NULL;
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if ($row = db_fetch_array($result)) {
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$path = $row['path'];
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}
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return $path;
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}
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/**
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* If the current drupal path (q=) is /node/nid, generate the breadcrumb trail
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* based on nid.
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*/
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function _taxonomy_breadcrumb_generate_breadcrumb($tid, $is_term_page = FALSE) {
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$term = taxonomy_get_term($tid);
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// HOME breadcrumb generation
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$home_text = variable_get('taxonomy_breadcrumb_home', '');
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if ($home_text != '') {
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$breadcrumb[] = l(t($home_text), NULL);
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}
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// VOCABULARY breadcrumb generation
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$vocabulary_path = _taxonomy_breadcrumb_get_vocabulary_path($term->vid);
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if ($vocabulary_path != NULL) {
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$vocabulary = taxonomy_vocabulary_load($term->vid);
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$breadcrumb[] = l(_taxonomy_breadcrumb_tt("taxonomy:vocabulary:$term->tid:name", $vocabulary->name), $vocabulary_path);
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}
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// TERM breadcrumb generation
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$parent_terms = array_reverse(taxonomy_get_parents_all($tid));
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foreach ($parent_terms as $parent_term) {
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$term_path = _taxonomy_breadcrumb_get_term_path($parent_term->tid);
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if ($term_path == NULL) {
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$term_path = taxonomy_term_path(taxonomy_get_term($parent_term->tid));
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}
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// Do not create links to own self if we are on a taxonomy/term page.
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if ($is_term_page && $parent_term->tid == $tid) {
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$breadcrumb[] = _taxonomy_breadcrumb_tt("taxonomy:term:$parent_term->tid:name", $parent_term->name);
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}
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else {
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$breadcrumb[] = l(_taxonomy_breadcrumb_tt("taxonomy:term:$parent_term->tid:name", $parent_term->name), $term_path);
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}
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}
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// Remove current TERM from end of breadcrumb trail
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if (!variable_get('taxonomy_breadcrumb_show_current_term', TRUE) && !is_null($breadcrumb)) {
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array_pop($breadcrumb);
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}
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return $breadcrumb;
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}
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/**
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* Helper function for when i18ntaxonomy module is not installed.
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*/
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function _taxonomy_breadcrumb_tt($string_id, $default, $language = NULL) {
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return function_exists('tt') ? tt($string_id, $default, $language) : $default;
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}
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