feat(services): add updateBrand function to BrandService

A new function `updateBrand` has been introduced to `BrandService`. This function handles updating a brand in the database, including checks for missing `id`, brand existence by `slug_name`, and logging for successful or failed updates.

Issue: #13
Signed-off-by: Mathis <yidhra@tuta.io>

src/services/brand.service.ts

@@ -34,8 +34,39 @@ async function createBrand(data: IDbBrand): Promise<unknown> {
     return { error: 'failed' };
 }
 
+/**
+ * Updates a brand in the database.
+ *
+ * @param {IDbBrand} data - The brand data to update.
+ * @returns {Promise<boolean>} - Indicates whether the update was successful or not.
+ */
+async function updateBrand(data: IDbBrand): Promise<boolean> {
+	if (!data.id) {
+		logger.error("Brand ID is missing");
+    return false;
+	}
+	const doesExist = await MysqlService.Brand.getBySlug(DbHandler, data.slug_name);
+  if (doesExist && doesExist.id !== data.id) {
+    logger.error(`Brand already exists (${data.slug_name})`);
+    return false;
+  }
+	const updatedBrand = await MysqlService.Brand.update(DbHandler, {
+    id: data.id,
+    slug_name: `${data.slug_name}`,
+    display_name: `${data.display_name}`,
+    image_blob: data.image_blob
+  });
+  if (updatedBrand) {
+    logger.info(`Brand updated successfully (${data.slug_name})`);
+    return true;
+  }
+  logger.error(`Failed to update brand (${data.slug_name})`);
+  return false;
+}
+
 const BrandService = {
-	create: createBrand
+	create: createBrand,
+	update: updateBrand
 }
 
 export default BrandService;