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<?php
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/**
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* @file
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*
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* Plugin to provide an argument handler for a Taxonomy term
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*/
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/**
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* Plugins are described by creating a $plugin array which will be used
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* by the system that includes this file.
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*/
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$plugin = array(
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'title' => t("Taxonomy term: ID"),
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// keyword to use for %substitution
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'keyword' => 'term',
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'description' => t('Creates a single taxonomy term from a taxonomy ID or taxonomy term name.'),
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'context' => 'ctools_term_context',
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'default' => array('input_form' => 'tid', 'breadcrumb' => TRUE, 'transform' => FALSE),
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'settings form' => 'ctools_term_settings_form',
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'settings form validate' => 'ctools_term_settings_form_validate',
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'placeholder form' => 'ctools_term_ctools_argument_placeholder',
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'breadcrumb' => 'ctools_term_breadcrumb',
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);
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/**
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* Discover if this argument gives us the term we crave.
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*/
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function ctools_term_context($arg = NULL, $conf = NULL, $empty = FALSE) {
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// If unset it wants a generic, unfilled context.
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if ($empty) {
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return ctools_context_create_empty('entity:taxonomy_term');
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}
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if (isset($conf['vocabularies'])) {
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$vocabularies = $conf['vocabularies'];
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}
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else {
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$vids = isset($conf['vids']) ? $conf['vids'] : array();
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// Convert legacy use of vids to machine names.
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$vocabularies = _ctools_term_vocabulary_machine_name_convert($vids);
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}
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if (is_object($arg)) {
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$term = $arg;
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}
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else {
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switch ($conf['input_form']) {
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case 'tid':
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default:
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if (!is_numeric($arg)) {
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return FALSE;
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}
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$term = taxonomy_term_load($arg);
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break;
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case 'term':
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if (!empty($conf['transform'])) {
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$arg = strtr($arg, '-', ' ');
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}
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$terms = taxonomy_get_term_by_name($arg);
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// If only one term is found, fall through to vocabulary check below.
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if ((count($terms) > 1) && $vocabularies) {
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foreach ($terms as $potential) {
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foreach ($vocabularies as $machine_name) {
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if ($potential->vocabulary_machine_name == $machine_name) {
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$term = $potential;
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// break out of the foreaches AND the case
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break 3;
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}
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}
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}
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}
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$term = array_shift($terms);
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break;
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}
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if (empty($term)) {
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return NULL;
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}
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}
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if ($vocabularies && !isset($vocabularies[$term->vocabulary_machine_name])) {
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return NULL;
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}
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$context = ctools_context_create('entity:taxonomy_term', $term);
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$context->original_argument = $arg;
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return $context;
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}
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/**
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* Settings form for the argument
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*/
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function ctools_term_settings_form(&$form, &$form_state, $conf) {
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// @todo allow synonym use like Views does.
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$form['settings']['input_form'] = array(
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'#title' => t('Argument type'),
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'#type' => 'radios',
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'#options' => array('tid' => t('Term ID'), 'term' => t('Term name')),
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'#default_value' => $conf['input_form'],
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'#prefix' => '<div class="clearfix">',
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'#suffix' => '</div>',
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);
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$vocabularies = taxonomy_get_vocabularies();
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$options = array();
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foreach ($vocabularies as $vid => $vocab) {
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$options[$vocab->machine_name] = $vocab->name;
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}
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// Fallback on legacy 'vids', when no vocabularies are available.
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if (empty($conf['vocabularies']) && !empty($conf['vids'])) {
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$conf['vocabularies'] = _ctools_term_vocabulary_machine_name_convert(array_filter($conf['vids']));
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unset($conf['vids']);
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}
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$form['settings']['vocabularies'] = array(
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'#title' => t('Limit to these vocabularies'),
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'#type' => 'checkboxes',
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'#options' => $options,
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'#default_value' => !empty($conf['vocabularies']) ? $conf['vocabularies'] : array(),
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'#description' => t('If no vocabularies are checked, terms from all vocabularies will be accepted.'),
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);
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$form['settings']['breadcrumb'] = array(
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'#title' => t('Inject hierarchy into breadcrumb trail'),
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'#type' => 'checkbox',
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'#default_value' => !empty($conf['breadcrumb']),
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'#description' => t('If checked, taxonomy term parents will appear in the breadcrumb trail.'),
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);
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$form['settings']['transform'] = array(
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'#title' => t('Transform dashes in URL to spaces in term name filter values'),
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'#type' => 'checkbox',
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'#default_value' => !empty($conf['transform']),
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);
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// return $form;
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}
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function ctools_term_settings_form_validate (&$form, &$form_state) {
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// Filter the selected vocabularies to avoid storing redundant data.
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$vocabularies = array_filter($form_state['values']['settings']['vocabularies']);
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form_set_value($form['settings']['vocabularies'], $vocabularies, $form_state);
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}
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/**
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* Form fragment to get an argument to convert a placeholder for preview.
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*/
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function ctools_term_ctools_argument_placeholder($conf) {
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switch ($conf['input_form']) {
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case 'tid':
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default:
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return array(
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'#type' => 'textfield',
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'#description' => t('Enter a taxonomy term ID.'),
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);
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case 'term':
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return array(
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'#type' => 'textfield',
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'#description' => t('Enter a taxonomy term name.'),
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);
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}
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}
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/**
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* Inject the breadcrumb trail if necessary.
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*/
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function ctools_term_breadcrumb($conf, $context) {
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if (empty($conf['breadcrumb']) || empty($context->data) || empty($context->data->tid)) {
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return;
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}
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$breadcrumb = array();
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$current = new stdClass();
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$current->tid = $context->data->tid;
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while ($parents = taxonomy_get_parents($current->tid)) {
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$current = array_shift($parents);
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$breadcrumb[] = l($current->name, 'taxonomy/term/' . $current->tid);
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}
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$breadcrumb = array_merge(drupal_get_breadcrumb(), array_reverse($breadcrumb));
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drupal_set_breadcrumb($breadcrumb);
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}
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/**
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* Helper function to convert convert legacy vocabulary ids into machine names.
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*
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* @param array $vids
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* Array of either vids.
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* @return array
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* A keyed array of machine names.
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*/
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function _ctools_term_vocabulary_machine_name_convert($vids) {
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$vocabularies = taxonomy_vocabulary_load_multiple($vids);
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$return = array();
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foreach($vocabularies as $vocabulary) {
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$return[$vocabulary->machine_name] = $vocabulary->machine_name;
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}
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return $return;
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}
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