library-mv-pt-2

libraries-http/src/main/java/com/baeldung/javalin/User/UserController.java

@@ -0,0 +1,24 @@
+package com.baeldung.javalin.User;
+
+import io.javalin.Handler;
+
+import java.util.Objects;
+
+public class UserController {
+    public static Handler fetchAllUsernames = ctx -> {
+        UserDao dao = UserDao.instance();
+        Iterable<String> allUsers = dao.getAllUsernames();
+        ctx.json(allUsers);
+    };
+
+    public static Handler fetchById = ctx -> {
+        int id = Integer.parseInt(Objects.requireNonNull(ctx.param("id")));
+        UserDao dao = UserDao.instance();
+        User user = dao.getUserById(id).get();
+        if (user == null) {
+            ctx.html("Not Found");
+        } else {
+            ctx.json(user);
+        }
+    };
+}