--- /dev/null
+<?php
+
+namespace Drupal\comment\Plugin\views\field;
+
+use Drupal\views\Plugin\views\field\Date;
+use Drupal\views\Plugin\views\display\DisplayPluginBase;
+use Drupal\views\ResultRow;
+use Drupal\views\ViewExecutable;
+
+/**
+ * Field handler to display the timestamp of a comment with the count of comments.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @ViewsField("comment_last_timestamp")
+ */
+class LastTimestamp extends Date {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
+ parent::init($view, $display, $options);
+
+ $this->additional_fields['comment_count'] = 'comment_count';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function render(ResultRow $values) {
+ $comment_count = $this->getValue($values, 'comment_count');
+ if (empty($this->options['empty_zero']) || $comment_count) {
+ return parent::render($values);
+ }
+ else {
+ return NULL;
+ }
+ }
+
+}