Feat: Restructuring MigrateImport, Dispatching a per product job for import

src/MigrateImport/Services/ImportLocale.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Modules\Core\MigrateImport\Services;
+
+use Lunar\Models\Language;
+
+/**
+ * The language every resolver in an import run writes product-facing text
+ * under (name, description, option names, ...) — NOT necessarily this
+ * store's own Lunar\Models\Language::getDefault(). An export file has no
+ * reliable way to declare its own language, and a store's default admin/
+ * storefront language is an independent fact from whatever language a
+ * given export happens to be written in — conflating the two (this
+ * class's own former name, DefaultLocale, said as much) used to silently
+ * save every imported product's text under the wrong language, invisible
+ * unless that language was also the one selected while viewing/editing
+ * the product afterward.
+ *
+ * Set once per import run from the operator's own answer (see
+ * Command\MigrateImportCommand::askImportLocale(), threaded through
+ * ImportSpec::$locale) at the top of Importer::import() — every resolver
+ * downstream (ProductAttributeResolver, ProductOptionResolver,
+ * CollectionResolver, ImportAttributeResolver) calls code() exactly as
+ * before, unaware anything changed. Falls back to Language::getDefault()
+ * only when nothing was ever set (e.g. an import path with no locale
+ * concept of its own — JudgeMe's reviews-only export never calls set()).
+ */
+class ImportLocale
+{
+    private static ?string $code = null;
+
+    public static function set(string $code): void
+    {
+        self::$code = $code;
+    }
+
+    public static function code(): string
+    {
+        return self::$code ?? Language::getDefault()->code;
+    }
+
+    /**
+     * A static property outlives a single request only inside a
+     * long-running worker process, where a queued job for one import
+     * must not leak its locale into the next — called at the end of
+     * every Importer::import() run, success or failure.
+     */
+    public static function reset(): void
+    {
+        self::$code = null;
+    }
+}