Bereite Shopify Bestellprojektion vor

modules/erp/artikel-mapping/service.php

@@ -257,6 +257,50 @@ function resolve_sellable_item_id(PDO $pdo, string $articleNumber, string $title
     return ensure_sellable_mapping_from_product_fallback($pdo, $articleNumber, $title);
 }
 
+function find_shopify_sellable_item_id(PDO $pdo, string $sku, string $variantGid): ?int
+{
+    $stmt = $pdo->prepare(
+        "SELECT sellable_item_id
+         FROM external_item_alias
+         WHERE source_system = 'shopify'
+           AND is_active = TRUE
+           AND (shopify_variant_gid = :variant_gid OR external_article_number = :sku)
+         ORDER BY CASE WHEN shopify_variant_gid = :sort_variant_gid THEN 0 ELSE 1 END, id
+         LIMIT 1"
+    );
+    $stmt->execute([
+        ':sku' => trim($sku),
+        ':variant_gid' => trim($variantGid),
+        ':sort_variant_gid' => trim($variantGid),
+    ]);
+
+    $id = $stmt->fetchColumn();
+    return $id === false ? null : (int) $id;
+}
+
+function bind_shopify_item_identity(PDO $pdo, int $sellableItemId, string $sku, string $productGid, string $variantGid): void
+{
+    $stmt = $pdo->prepare(
+        "UPDATE external_item_alias
+         SET shopify_product_gid = :product_gid,
+             shopify_variant_gid = :variant_gid,
+             updated_at = NOW()
+         WHERE source_system = 'shopify'
+           AND sellable_item_id = :sellable_item_id
+           AND external_article_number = :sku"
+    );
+    $stmt->execute([
+        ':product_gid' => trim($productGid) !== '' ? trim($productGid) : null,
+        ':variant_gid' => trim($variantGid) !== '' ? trim($variantGid) : null,
+        ':sellable_item_id' => $sellableItemId,
+        ':sku' => trim($sku),
+    ]);
+
+    if ($stmt->rowCount() !== 1) {
+        throw new RuntimeException("Kein eindeutiger Shopify-Alias fuer SKU '{$sku}'");
+    }
+}
+
 function get_item_components(PDO $pdo, int $sellableItemId): array
 {
     $stmt = $pdo->prepare(