From 62211ff90980f02706ca5131a411149d595c4fed Mon Sep 17 00:00:00 2001
From: Seth Shaw <seth.shaw@unlv.edu>
Date: Wed, 8 Jun 2022 16:43:39 -0700
Subject: [PATCH] add NodeHasMediaUse views filter

---
 islandora.views.inc                         | 12 +++
 src/Plugin/views/filter/NodeHasMediaUse.php | 88 +++++++++++++++++++++
 2 files changed, 100 insertions(+)
 create mode 100644 src/Plugin/views/filter/NodeHasMediaUse.php

diff --git a/islandora.views.inc b/islandora.views.inc
index cd826d08..de176f15 100644
--- a/islandora.views.inc
+++ b/islandora.views.inc
@@ -22,4 +22,16 @@ function islandora_views_data_alter(&$data) {
       $data['node__' . $field][$field]['field']['id'] = 'integer_weight_selector';
     }
   }
+
+  // Add Has Media filter.
+  $data['node_field_data']['islandora_has_media'] = [
+    'title' => t('Node has Media Use'),
+    'group' => t('Content'),
+    'filter' => [
+      'title' => t('Node has media use filter'),
+      'help' => t('Provides a custom filter for nodes that do or do not have media with a given use.'),
+      'field' => 'nid',
+      'id' => 'islandora_node_has_media_use',
+    ],
+  ];
 }
diff --git a/src/Plugin/views/filter/NodeHasMediaUse.php b/src/Plugin/views/filter/NodeHasMediaUse.php
new file mode 100644
index 00000000..e83c6306
--- /dev/null
+++ b/src/Plugin/views/filter/NodeHasMediaUse.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Drupal\islandora\Plugin\views\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\filter\FilterPluginBase;
+
+/**
+ * Views Filter on Having Media of a Type.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @ViewsFilter("islandora_node_has_media_use")
+ */
+class NodeHasMediaUse extends FilterPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+
+    $options['use_uri'] = ['default' => NULL];
+    $options['negated'] = ['default' => FALSE];
+
+    return $options;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateOptionsForm(&$form, FormStateInterface $form_state) {
+    parent::validateOptionsForm($form, $form_state);
+
+    $uri = $form_state->getValues()['options']['use_uri'];
+    $term = \Drupal::service('islandora.utils')->getTermForUri($uri);
+    if (empty($term)) {
+      $form_state->setError($form['use_uri'], $this->t('Could not find term with URI: "%uri"', ['%uri' => $uri]));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function valueForm(&$form, FormStateInterface $form_state) {
+    $form['use_uri'] = [
+      '#type' => 'textfield',
+      '#title' => "Media Use URI",
+      '#default_value' => $this->options['use_uri'],
+      '#required' => TRUE,
+    ];
+    $form['negated'] = [
+      '#type' => 'checkbox',
+      '#title' => 'Negated',
+      '#description' => $this->t("Return nodes that <em>don't</em> have this use URI"),
+      '#default_value' => $this->options['negated'],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function adminSummary() {
+    $operator = ($this->options['negated']) ? "does not have" : "has";
+    return "Node {$operator} media with use: '{$this->options['use_uri']}'";
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function query() {
+    $condition = ($this->options['negated']) ? 'NOT IN' : 'IN';
+    $utils = \Drupal::service('islandora.utils');
+    $term = $utils->getTermForUri($this->options['use_uri']);
+    if (empty($term)) {
+      \Drupal::logger('islandora')->warning('Node Has Media Filter could not find term with URI: "%uri"', ['%uri' => $this->options['use_uri']]);
+      return;
+    }
+    $sub_query = \Drupal::database()->select('media', 'm');
+    $sub_query->join('media__field_media_use', 'use', 'm.mid = use.entity_id');
+    $sub_query->join('media__field_media_of', 'of', 'm.mid = of.entity_id');
+    $sub_query->fields('of', ['field_media_of_target_id'])
+      ->condition('use.field_media_use_target_id', $term->id());
+    $this->query->addWhere(0, 'nid', $sub_query, $condition);
+
+  }
+
+}