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<?php
namespace Drupal\taxonomy\Plugin\views\filter;
use Drupal\Core\Form\FormStateInterface;
class TaxonomyIndexTidDepth extends TaxonomyIndexTid {
public function operatorOptions($which = 'title') {
return array(
'or' => $this
->t('Is one of'),
);
}
protected function defineOptions() {
$options = parent::defineOptions();
$options['depth'] = array(
'default' => 0,
);
return $options;
}
public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
parent::buildExtraOptionsForm($form, $form_state);
$form['depth'] = array(
'#type' => 'weight',
'#title' => $this
->t('Depth'),
'#default_value' => $this->options['depth'],
'#description' => $this
->t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
);
}
public function query() {
if (count($this->value) == 0) {
return;
}
elseif (count($this->value) == 1) {
if (is_array($this->value)) {
$this->value = current($this->value);
}
$operator = '=';
}
else {
$operator = 'IN';
}
if (!empty($this->relationship)) {
$this->tableAlias = $this->relationship;
}
else {
$this->tableAlias = $this->query
->ensureTable($this->view->storage
->get('base_table'));
}
$subquery = db_select('taxonomy_index', 'tn');
$subquery
->addField('tn', 'nid');
$where = db_or()
->condition('tn.tid', $this->value, $operator);
$last = "tn";
if ($this->options['depth'] > 0) {
$subquery
->leftJoin('taxonomy_term_hierarchy', 'th', "th.tid = tn.tid");
$last = "th";
foreach (range(1, abs($this->options['depth'])) as $count) {
$subquery
->leftJoin('taxonomy_term_hierarchy', "th{$count}", "{$last}.parent = th{$count}.tid");
$where
->condition("th{$count}.tid", $this->value, $operator);
$last = "th{$count}";
}
}
elseif ($this->options['depth'] < 0) {
foreach (range(1, abs($this->options['depth'])) as $count) {
$subquery
->leftJoin('taxonomy_term_hierarchy', "th{$count}", "{$last}.tid = th{$count}.parent");
$where
->condition("th{$count}.tid", $this->value, $operator);
$last = "th{$count}";
}
}
$subquery
->condition($where);
$this->query
->addWhere($this->options['group'], "{$this->tableAlias}.{$this->realField}", $subquery, 'IN');
}
}