feat(api): create endpoints to check if a given username/email already exists in the database

server/api/exists/email.get.ts

@@ -0,0 +1,16 @@
+import { usernameRegex } from "~/lib/server/constants";
+import { User } from "~/models/user";
+
+export default eventHandler(async (event) => {
+	const query = getQuery(event);
+	const u = await User.findOne({
+		email: query.email as string,
+	}).exec();
+	if (u) {
+		return {
+			exists: true,
+		};
+	} else {
+		return { exists: false };
+	}
+});

server/api/exists/username.get.ts

@@ -0,0 +1,16 @@
+import { usernameRegex } from "~/lib/server/constants";
+import { User } from "~/models/user";
+
+export default eventHandler(async (event) => {
+	const query = getQuery(event);
+	const u = await User.findOne({
+		username: usernameRegex(query.username as string),
+	}).exec();
+	if (u) {
+		return {
+			exists: true,
+		};
+	} else {
+		return { exists: false };
+	}
+});