Chore(medusa,utils,types,inventory,stock-location): remove core dependency modules (#3531)

packages/utils/src/common/set-metadata.ts

@@ -0,0 +1,45 @@
+import { MedusaError } from "./errors"
+
+/**
+ * Dedicated method to set metadata.
+ * @param obj - the entity to apply metadata to.
+ * @param metadata - the metadata to set
+ * @return resolves to the updated result.
+ */
+export function setMetadata(
+  obj: { metadata: Record<string, unknown> | null },
+  metadata: Record<string, unknown>
+): Record<string, unknown> {
+  const existing = obj.metadata || {}
+  const newData = {}
+
+  for (const [key, value] of Object.entries(metadata)) {
+    if (typeof key !== "string") {
+      throw new MedusaError(
+        MedusaError.Types.INVALID_ARGUMENT,
+        "Key type is invalid. Metadata keys must be strings"
+      )
+    }
+
+    /**
+     * We reserve the empty string as a way to delete a key.
+     * If the value is an empty string, we don't
+     * set it, and if it exists in the existing metadata, we
+     * unset the field.
+     */
+    if (value === "") {
+      if (key in existing) {
+        delete existing[key]
+      }
+
+      continue
+    }
+
+    newData[key] = value
+  }
+
+  return {
+    ...existing,
+    ...newData,
+  }
+}