Restore the file

Author: xleafx

modules/quanthub_visualization/src/Plugin/Field/FieldWidget/QuanthubVisualizationTransformationWidget.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace Drupal\quanthub_visualization\Plugin\Field\FieldWidget;
+
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\multivalue_form_element\Element\MultiValue;
+
+/**
+ * Implementation of the 'quanthub_visualization_transformation_json' widget.
+ *
+ * @todo refactor and remove.
+ *
+ * @FieldWidget(
+ *   id = "quanthub_visualization_transformation_json",
+ *   label = @Translation("Quanthub Visualization Data Transformation Widget"),
+ *   field_types = {
+ *     "json",
+ *     "json_native",
+ *     "json_native_binary"
+ *   }
+ * )
+ */
+class QuanthubVisualizationTransformationWidget extends WidgetBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+    $json_value = json_decode($items->getString(), 1);
+
+    // @todo add remove button.
+    $element['value'] = [
+      '#type' => 'multivalue',
+      '#title' => $this->t('Data Transformation Config'),
+      '#cardinality' => MultiValue::CARDINALITY_UNLIMITED,
+      '#default_value' => !empty($json_value['display']) ? $json_value['display'] : [],
+      'dimensionId' => [
+        '#type' => 'textfield',
+        '#title' => $this->t('Dimension ID'),
+      ],
+      'field' => [
+        '#type' => 'textfield',
+        '#title' => $this->t('Field'),
+      ],
+      '#element_validate' => [
+        [$this, 'validate'],
+      ],
+    ];
+
+    return $element;
+  }
+
+  /**
+   * Validation and setting value in widget.
+   *
+   * @param array $element
+   *   The render array of element.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The form_state object.
+   */
+  public function validate($element, FormStateInterface $form_state) {
+    $value = $element['#value'];
+
+    $value = array_filter($value, function ($item) {
+      if (empty($item['dimensionId']) && empty($item['field'])) {
+        return FALSE;
+      }
+      else {
+        return TRUE;
+      }
+    });
+
+    $value = json_encode(['display' => $value]);
+    $form_state->setValueForElement($element, $value);
+  }
+
+}