feat: add new DTO UserInClassroomResponse

Author: vianavitor-dev

src/main/java/com/vianavitor/simplelibrarygame/controller/ClassroomController.java

@@ -3,7 +3,10 @@
 import com.vianavitor.simplelibrarygame.dto.ApiResponse;
 import com.vianavitor.simplelibrarygame.dto.request.ChangeNameRequest;
 import com.vianavitor.simplelibrarygame.dto.request.ModifyUsersInClassroomRequest;
+import com.vianavitor.simplelibrarygame.dto.response.UserInClassroomResponse;
+import com.vianavitor.simplelibrarygame.model.BookReadHistory;
 import com.vianavitor.simplelibrarygame.model.Classroom;
+import com.vianavitor.simplelibrarygame.model.Student;
 import com.vianavitor.simplelibrarygame.model.utils.classes.UserClassroom;
 import com.vianavitor.simplelibrarygame.service.ClassroomService;
 import jakarta.servlet.http.HttpServletRequest;
@@ -16,6 +19,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 @RestController
 @RequestMapping("/api/classrooms")
@@ -49,12 +53,16 @@ public ResponseEntity<ApiResponse<Classroom>> getById(
     }
 
     @PutMapping("/{id}/users")
-    public ResponseEntity<ApiResponse<Set<UserClassroom>>> modifyUsers(
+    public ResponseEntity<ApiResponse<Set<UserInClassroomResponse>>> modifyUsers(
             @PathVariable Long id,
             @Valid @RequestBody ModifyUsersInClassroomRequest request,
             HttpServletRequest req
     ) {
-        Set<UserClassroom> updated = classroomService.modifyUsersInClassroom(id, request.userIds());
+        Set<UserInClassroomResponse> updated = classroomService.modifyUsersInClassroom(id, request.userIds())
+                .stream()
+                .map(this::userClassroomToDtoResp)
+                .collect(Collectors.toSet());
+
         return ResponseEntity.ok(ApiResponse.success(updated, "Users updated", req.getRequestURI()));
     }
 
@@ -74,4 +82,25 @@ public ResponseEntity<ApiResponse<Void>> deleteClassroom(@PathVariable Long id,
         ApiResponse<Void> response = ApiResponse.success(null, "Classroom deleted", request.getRequestURI());
         return ResponseEntity.ok(response);
     }
+
+    private UserInClassroomResponse userClassroomToDtoResp(UserClassroom user) {
+        if (user instanceof Student) {
+            BookReadHistory history = ((Student) user).getStats().getCurrentBook();
+
+            return new UserInClassroomResponse(
+                    user.getId(), user.getName(), user.getUsername(), user.getLastLogin(),
+                    new UserInClassroomResponse.CurrentBookInfo(
+                            history.getId(),
+                            history.getBook().getTitle()
+                    ),
+                    false,
+                    user.isActive()
+            );
+        }
+
+        return new UserInClassroomResponse(
+                user.getId(), user.getName(), user.getUsername(), user.getLastLogin(),
+                null, false, user.isActive()
+        );
+    }
 }

src/main/java/com/vianavitor/simplelibrarygame/dto/response/UserInClassroomResponse.java

@@ -0,0 +1,21 @@
+package com.vianavitor.simplelibrarygame.dto.response;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.annotation.Nullable;
+
+import java.time.LocalDate;
+
+public record UserInClassroomResponse(
+        Long id,
+        String name,
+        String username,
+        LocalDate lastLogin,
+        @Nullable CurrentBookInfo currentBook,
+        @JsonProperty("is_professor") boolean isProfessor,
+        boolean active
+) {
+    public record CurrentBookInfo (
+            @Nullable Long id,
+            @Nullable String title
+    ) {}
+}

src/main/java/com/vianavitor/simplelibrarygame/model/Student.java

@@ -1,5 +1,6 @@
 package com.vianavitor.simplelibrarygame.model;
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 import com.vianavitor.simplelibrarygame.model.utils.classes.UserClassroom;
 import jakarta.persistence.*;
@@ -21,6 +22,7 @@ public class Student extends UserClassroom {
             joinColumns = @JoinColumn(name = "user_id"),
             inverseJoinColumns = @JoinColumn(name = "genre_id")
     )
+    @JsonBackReference
     private Set<Genre> favoriteGenre = new HashSet<>();
 
     @Autowired

src/main/java/com/vianavitor/simplelibrarygame/service/ClassroomService.java

@@ -1,12 +1,10 @@
 package com.vianavitor.simplelibrarygame.service;
 
+import com.vianavitor.simplelibrarygame.dto.response.UserInClassroomResponse;
 import com.vianavitor.simplelibrarygame.exception.DuplicateResourceException;
 import com.vianavitor.simplelibrarygame.exception.InvalidOperationException;
 import com.vianavitor.simplelibrarygame.exception.ResourceNotFoundException;
-import com.vianavitor.simplelibrarygame.model.Book;
-import com.vianavitor.simplelibrarygame.model.Classroom;
-import com.vianavitor.simplelibrarygame.model.Professor;
-import com.vianavitor.simplelibrarygame.model.Student;
+import com.vianavitor.simplelibrarygame.model.*;
 import com.vianavitor.simplelibrarygame.model.utils.classes.User;
 import com.vianavitor.simplelibrarygame.model.utils.classes.UserClassroom;
 import com.vianavitor.simplelibrarygame.repository.ClassroomRepository;
@@ -17,6 +15,7 @@
 import org.springframework.stereotype.Service;
 
 import java.util.*;
+import java.util.stream.Collectors;
 
 @Service
 public class ClassroomService {