trabajando en usuarios

src/main/java/com/imprimelibros/erp/users/UserController.java

@@ -0,0 +1,46 @@
+package com.imprimelibros.erp.users;
+
+import com.imprimelibros.erp.datatables.DataTablesResponse;
+
+import jakarta.servlet.http.HttpServletRequest;
+
+import org.springframework.data.jpa.domain.Specification;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.security.access.prepost.PreAuthorize;
+
+import com.imprimelibros.erp.datatables.DataTablesRequest;
+import com.imprimelibros.erp.datatables.DataTablesParser;
+import com.imprimelibros.erp.datatables.DataTable;
+
+import java.util.Map;
+import java.util.List;
+
+@Controller
+@RequestMapping("/users")
+public class UserController {   
+
+    private UserDao repo;
+
+    public UserController(UserDao repo, UserService userService) {
+        this.repo = repo;
+    }
+
+    @PreAuthorize("hasRole('ADMIN') or hasRole('SUPERADMIN')")
+    @GetMapping("/")
+    public DataTablesResponse<Map<String,Object>> datatable(HttpServletRequest request) {
+        
+        DataTablesRequest dt = DataTablesParser.from(request);
+
+        Specification<User> base = (root, query, cb) -> cb.conjunction();
+        long total = repo.count();
+
+        return DataTable
+            .of(repo, User.class, dt, List.of(
+                "username", "email", "role" // campos buscables
+            ))
+            .where(base)
+            .toJson(total);
+    }
+}