--- /dev/null
+<?php
+
+namespace Drupal\language\Config;
+
+/**
+ * Provides a common trait for working with language override collection names.
+ */
+trait LanguageConfigCollectionNameTrait {
+
+ /**
+ * Creates a configuration collection name based on a language code.
+ *
+ * @param string $langcode
+ * The language code.
+ *
+ * @return string
+ * The configuration collection name for a language code.
+ */
+ protected function createConfigCollectionName($langcode) {
+ return 'language.' . $langcode;
+ }
+
+ /**
+ * Converts a configuration collection name to a language code.
+ *
+ * @param string $collection
+ * The configuration collection name.
+ *
+ * @return string
+ * The language code of the collection.
+ *
+ * @throws \InvalidArgumentException
+ * Exception thrown if the provided collection name is not in the format
+ * "language.LANGCODE".
+ *
+ * @see self::createConfigCollectionName()
+ */
+ protected function getLangcodeFromCollectionName($collection) {
+ preg_match('/^language\.(.*)$/', $collection, $matches);
+ if (!isset($matches[1])) {
+ throw new \InvalidArgumentException("'$collection' is not a valid language override collection");
+ }
+ return $matches[1];
+ }
+
+}