Add services

Author: hernandosebastian

src/services/index.ts

@@ -0,0 +1 @@
+export { default as ItemService } from "./item.service";

src/services/item.service.ts

@@ -0,0 +1,41 @@
+import { ItemDTO, ItemModel } from "../models";
+import { ErrorMessages } from "../utils";
+
+class ItemService {
+  async create(itemData: ItemDTO) {
+    return await ItemModel.create(itemData);
+  }
+
+  async get(itemId: string) {
+    const item = await ItemModel.get(itemId);
+
+    if (!item) {
+      throw new Error(ErrorMessages.ITEM_NOT_FOUND);
+    }
+
+    return item;
+  }
+
+  async getAll() {
+    return await ItemModel.scan().exec();
+  }
+
+  async update(itemId: string, itemData: ItemDTO) {
+    const updatedItem = await ItemModel.update(itemId, itemData);
+
+    if (!updatedItem) {
+      throw new Error(ErrorMessages.ITEM_NOT_FOUND);
+    }
+
+    return updatedItem;
+  }
+
+  async delete(itemId: string) {
+    const item = await this.get(itemId);
+    await ItemModel.delete(itemId);
+
+    return item;
+  }
+}
+
+export default ItemService;