changed contacts routes to typescript

backend/src/services/ContactServices/CreateContactService.ts

@@ -0,0 +1,32 @@
+import AppError from "../../errors/AppError";
+import Contact from "../../models/Contact";
+
+interface Request {
+  name: string;
+  number: string;
+  email?: string;
+}
+
+const CreateContactService = async ({
+  name,
+  number,
+  email
+}: Request): Promise<Contact> => {
+  const numberExists = await Contact.findOne({
+    where: { number }
+  });
+
+  if (numberExists) {
+    throw new AppError("A contact with this number already exists.");
+  }
+
+  const contact = await Contact.create({
+    name,
+    number,
+    email
+  });
+
+  return contact;
+};
+
+export default CreateContactService;