diff core/modules/datetime_range/src/DateTimeRangeTrait.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/datetime_range/src/DateTimeRangeTrait.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,49 @@
+<?php
+
+namespace Drupal\datetime_range;
+
+use Drupal\Core\Field\FieldItemListInterface;
+
+/**
+ * Provides friendly methods for datetime range.
+ */
+trait DateTimeRangeTrait {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function viewElements(FieldItemListInterface $items, $langcode) {
+    $elements = [];
+    $separator = $this->getSetting('separator');
+
+    foreach ($items as $delta => $item) {
+      if (!empty($item->start_date) && !empty($item->end_date)) {
+        /** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
+        $start_date = $item->start_date;
+        /** @var \Drupal\Core\Datetime\DrupalDateTime $end_date */
+        $end_date = $item->end_date;
+
+        if ($start_date->getTimestamp() !== $end_date->getTimestamp()) {
+          $elements[$delta] = [
+            'start_date' => $this->buildDateWithIsoAttribute($start_date),
+            'separator' => ['#plain_text' => ' ' . $separator . ' '],
+            'end_date' => $this->buildDateWithIsoAttribute($end_date),
+          ];
+        }
+        else {
+          $elements[$delta] = $this->buildDateWithIsoAttribute($start_date);
+
+          if (!empty($item->_attributes)) {
+            $elements[$delta]['#attributes'] += $item->_attributes;
+            // Unset field item attributes since they have been included in the
+            // formatter output and should not be rendered in the field template.
+            unset($item->_attributes);
+          }
+        }
+      }
+    }
+
+    return $elements;
+  }
+
+}