Version 1

[yaffs-website] / web / core / modules / taxonomy / src / Plugin / views / filter / TaxonomyIndexTidDepth.php

diff --git a/web/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php b/web/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php
new file mode 100644 (file)
index 0000000..732f5b1
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+++ b/web/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace Drupal\taxonomy\Plugin\views\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Filter handler for taxonomy terms with depth.
+ *
+ * This handler is actually part of the node table and has some restrictions,
+ * because it uses a subquery to find nodes with.
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @ViewsFilter("taxonomy_index_tid_depth")
+ */
+class TaxonomyIndexTidDepth extends TaxonomyIndexTid {
+
+  public function operatorOptions($which = 'title') {
+    return [
+      'or' => $this->t('Is one of'),
+    ];
+  }
+
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+
+    $options['depth'] = ['default' => 0];
+
+    return $options;
+  }
+
+  public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
+    parent::buildExtraOptionsForm($form, $form_state);
+
+    $form['depth'] = [
+      '#type' => 'weight',
+      '#title' => $this->t('Depth'),
+      '#default_value' => $this->options['depth'],
+      '#description' => $this->t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
+    ];
+  }
+
+  public function query() {
+    // If no filter values are present, then do nothing.
+    if (count($this->value) == 0) {
+      return;
+    }
+    elseif (count($this->value) == 1) {
+      // Sometimes $this->value is an array with a single element so convert it.
+      if (is_array($this->value)) {
+        $this->value = current($this->value);
+      }
+      $operator = '=';
+    }
+    else {
+      $operator = 'IN';# " IN (" . implode(', ', array_fill(0, sizeof($this->value), '%d')) . ")";
+    }
+
+    // The normal use of ensureMyTable() here breaks Views.
+    // So instead we trick the filter into using the alias of the base table.
+    //   See https://www.drupal.org/node/271833.
+    // If a relationship is set, we must use the alias it provides.
+    if (!empty($this->relationship)) {
+      $this->tableAlias = $this->relationship;
+    }
+    // If no relationship, then use the alias of the base table.
+    else {
+      $this->tableAlias = $this->query->ensureTable($this->view->storage->get('base_table'));
+    }
+
+    // Now build the subqueries.
+    $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');
+  }
+
+}