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<?php
/**
* @file
* Page callbacks for the taxonomy module.
*/
/**
* Menu callback; displays all nodes associated with a term.
*
* @param $term
* The taxonomy term.
* @return
* The page content.
*/
function taxonomy_term_page($term) {
// If there is a menu link to this term, the link becomes the last part of
// the active trail, and the link name becomes the page title. Thus, we must
// explicitly set the page title to be the term title.
drupal_set_title($term->name);
// Build breadcrumb based on the hierarchy of the term.
$current = (object) array(
'tid' => $term->tid,
);
// @todo This overrides any other possible breadcrumb and is a pure hard-coded
// presumption. Make this behavior configurable per vocabulary or term.
$breadcrumb = array();
while ($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);
drupal_add_feed('taxonomy/term/' . $term->tid . '/feed', 'RSS - ' . $term->name);
// Set the term path as the canonical URL to prevent duplicate content.
$uri = entity_uri('taxonomy_term', $term);
drupal_add_html_head_link(array('rel' => 'canonical', 'href' => url($uri['path'], $uri['options'])), TRUE);
// Set the non-aliased path as a default shortlink.
drupal_add_html_head_link(array('rel' => 'shortlink', 'href' => url($uri['path'], array_merge($uri['options'], array('alias' => TRUE)))), TRUE);
// Normally we would call taxonomy_term_show() here, but for backwards
// compatibility in Drupal 7 we do not want to do that (it produces different
// data structures and HTML markup than what Drupal 7 released with). Calling
// taxonomy_term_view() directly provides essentially the same thing, but
// allows us to wrap the rendered term in our desired array structure.
$build['term_heading'] = array(
'#prefix' => '<div class="term-listing-heading">',
'#suffix' => '</div>',
'term' => taxonomy_term_view($term, 'full'),
);
if ($nids = taxonomy_select_nodes($term->tid, TRUE, variable_get('default_nodes_main', 10))) {
$nodes = node_load_multiple($nids);
$build += node_view_multiple($nodes);
$build['pager'] = array(
'#theme' => 'pager',
'#weight' => 5,
);
}
else {
$build['no_content'] = array(
'#prefix' => '<p>',
'#markup' => t('There is currently no content classified with this term.'),
'#suffix' => '</p>',
);
}
return $build;
}
/**
* Generate the content feed for a taxonomy term.
*
* @param $term
* The taxonomy term.
*/
function taxonomy_term_feed($term) {
$channel['link'] = url('taxonomy/term/' . $term->tid, array('absolute' => TRUE));
$channel['title'] = variable_get('site_name', 'Drupal') . ' - ' . $term->name;
// Only display the description if we have a single term, to avoid clutter and confusion.
// HTML will be removed from feed description.
$channel['description'] = check_markup($term->description, $term->format, '', TRUE);
$nids = taxonomy_select_nodes($term->tid, FALSE, variable_get('feed_default_items', 10));
node_feed($nids, $channel);
}
/**
* Page callback: Outputs JSON for taxonomy autocomplete suggestions.
*
* Path: taxonomy/autocomplete
*
* This callback outputs term name suggestions in response to Ajax requests
* made by the taxonomy autocomplete widget for taxonomy term reference
* fields. The output is a JSON object of plain-text term suggestions, keyed by
* the user-entered value with the completed term name appended. Term names
* containing commas are wrapped in quotes.
*
* For example, suppose the user has entered the string 'red fish, blue' in the
* field, and there are two taxonomy terms, 'blue fish' and 'blue moon'. The
* JSON output would have the following structure:
* @code
* {
* "red fish, blue fish": "blue fish",
* "red fish, blue moon": "blue moon",
* };
* @endcode
*
* @param $field_name
* The name of the term reference field.
* @param $tags_typed
* (optional) A comma-separated list of term names entered in the
* autocomplete form element. Only the last term is used for autocompletion.
* Defaults to '' (an empty string).
*
* @see taxonomy_menu()
* @see taxonomy_field_widget_info()
*/
function taxonomy_autocomplete($field_name = '', $tags_typed = '') {
// If the request has a '/' in the search text, then the menu system will have
// split it into multiple arguments, recover the intended $tags_typed.
$args = func_get_args();
// Shift off the $field_name argument.
array_shift($args);
$tags_typed = implode('/', $args);
// Make sure the field exists and is a taxonomy field.
if (!($field = field_info_field($field_name)) || $field['type'] !== 'taxonomy_term_reference') {
// Error string. The JavaScript handler will realize this is not JSON and
// will display it as debugging information.
print t('Taxonomy field @field_name not found.', array('@field_name' => $field_name));
exit;
}
// The user enters a comma-separated list of tags. We only autocomplete the last tag.
$tags_typed = drupal_explode_tags($tags_typed);
$tag_last = drupal_strtolower(array_pop($tags_typed));
$term_matches = array();
if ($tag_last != '') {
// Part of the criteria for the query come from the field's own settings.
$vids = array();
$vocabularies = taxonomy_vocabulary_get_names();
foreach ($field['settings']['allowed_values'] as $tree) {
$vids[] = $vocabularies[$tree['vocabulary']]->vid;
}
$query = db_select('taxonomy_term_data', 't');
$query->addTag('translatable');
$query->addTag('term_access');
// Do not select already entered terms.
if (!empty($tags_typed)) {
$query->condition('t.name', $tags_typed, 'NOT IN');
}
// Select rows that match by term name.
$tags_return = $query
->fields('t', array('tid', 'name'))
->condition('t.vid', $vids)
->condition('t.name', '%' . db_like($tag_last) . '%', 'LIKE')
->range(0, 10)
->execute()
->fetchAllKeyed();
$prefix = count($tags_typed) ? drupal_implode_tags($tags_typed) . ', ' : '';
foreach ($tags_return as $tid => $name) {
$n = $name;
// Term names containing commas or quotes must be wrapped in quotes.
if (strpos($name, ',') !== FALSE || strpos($name, '"') !== FALSE) {
$n = '"' . str_replace('"', '""', $name) . '"';
}
$term_matches[$prefix . $n] = check_plain($name);
}
}
drupal_json_output($term_matches);
}