--- /dev/null
+<?php
+/**
+ * @file
+ * @author Niklas Laxström
+ * @license GPL-2.0+
+ */
+
+namespace LocalisationUpdate;
+
+/**
+ * Reads MediaWiki JSON i18n files.
+ */
+class JSONReader implements Reader {
+ /// @var string Language tag
+ protected $code;
+
+ public function __construct( $code = null ) {
+ $this->code = $code;
+ }
+
+ public function parse( $contents ) {
+ $messages = \FormatJson::decode( $contents, true );
+ unset( $messages['@metadata'] );
+
+ if ( $this->code ) {
+ return [ $this->code => $messages ];
+ }
+
+ // Assuming that the array is keyed by language codes
+ return $messages;
+ }
+}