1 files changed, 37 insertions, 0 deletions
diff --git a/MLEB/Translate/src/Utilities/Json/JsonUnserializableTrait.php b/MLEB/Translate/src/Utilities/Json/JsonUnserializableTrait.php
new file mode 100644
index 00000000..2db96ca1
--- /dev/null
+++ b/MLEB/Translate/src/Utilities/Json/JsonUnserializableTrait.php
@@ -0,0 +1,37 @@
+<?php
+declare( strict_types = 1 );
+
+namespace MediaWiki\Extension\Translate\Utilities\Json;
+
+use FormatJson;
+
+/**
+ * Can be used by classes that want to serialize / deserialize
+ * Remove once we need to support only MW >= 1.36
+ * See Change-Id: I5433090ae8e2b3f2a4590cc404baf838025546ce
+ *
+ * @license GPL-2.0-or-later
+ * @since 2020.12
+ */
+trait JsonUnserializableTrait {
+	public function jsonSerialize() {
+		return $this->annotateJsonForDeserialization(
+			$this->toJsonArray()
+		);
+	}
+
+	/** Annotate the $json array with class metadata. */
+	private function annotateJsonForDeserialization( array $json ): string {
+		$json[JsonCodec::TYPE_ANNOTATION] = get_class( $this );
+		return FormatJson::encode( $json, false, FormatJson::ALL_OK );
+	}
+
+	/**
+	 * Prepare this object for JSON serialization.
+	 * The returned array will be passed to self::newFromJsonArray
+	 * upon JSON deserialization.
+	 */
+	abstract protected function toJsonArray(): array;
+}
+
+class_alias( JsonUnserializableTrait::class, '\MediaWiki\Extensions\Translate\JsonUnserializableTrait' );