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@tharindra26 tharindra26 commented Dec 3, 2024

Summary by CodeRabbit

Release Notes

  • New Features

    • Introduced real-time monitoring and browser lockdown management for exams.
    • Added functionality to assign moderators and retrieve their details.
    • Enabled commenting on questions and updated exam status management.
    • New endpoints for retrieving exams moderated by specific exam setters.
  • Improvements

    • Enhanced error handling for various endpoints.
    • Added email notifications for exam hosting and registration confirmations.
  • New Classes

    • Added request and response classes for moderator management and real-time monitoring.

These updates significantly enhance exam management capabilities, improving user experience and operational efficiency.

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coderabbitai bot commented Dec 3, 2024

Caution

Review failed

The pull request is closed.

Walkthrough

The pull request introduces significant enhancements to the exam management system by adding multiple new endpoints in the ExamManagementController and ExamSetterController. Key features include real-time monitoring, browser lockdown capabilities, moderator management, and question commenting. Additionally, new data models and response classes are created to support these functionalities. The Exam class is updated to include new fields related to monitoring and lockdown, while repositories are modified to support new query methods. Overall, the changes aim to improve exam management and monitoring features.

Changes

File Change Summary
src/main/java/com/testify/Testify_Backend/controller/ExamManagementController.java Added multiple endpoints for real-time monitoring, browser lockdown, hosted status, moderator management, and question commenting.
src/main/java/com/testify/Testify_Backend/controller/ExamSetterController.java Introduced a new endpoint to retrieve moderating exams for a specific exam setter.
src/main/java/com/testify/Testify_Backend/model/Exam.java Added fields for real-time monitoring, browser lockdown, hosted status, and a Zoom link.
src/main/java/com/testify/Testify_Backend/model/ExamSetter.java Minor change: added two blank lines at the end of the class.
src/main/java/com/testify/Testify_Backend/model/Question.java Added a new field for comments on questions.
src/main/java/com/testify/Testify_Backend/repository/ExamRepository.java Added a method to find exams by moderator ID.
src/main/java/com/testify/Testify_Backend/repository/QuestionRepository.java Added a method to find non-deleted questions by ID.
src/main/java/com/testify/Testify_Backend/requests/exam_management/ModeratorRequest.java Added a new class for moderator request data.
src/main/java/com/testify/Testify_Backend/requests/exam_management/QuestionCommentRequest.java Added a new class for question comment requests.
src/main/java/com/testify/Testify_Backend/requests/exam_management/RealTimeMonitoringRequest.java Added a new class for real-time monitoring requests.
src/main/java/com/testify/Testify_Backend/responses/GenericResponse.java Modified to replace the code field with a success field and removed the content field.
src/main/java/com/testify/Testify_Backend/responses/exam_management/BrowserLockdownResponse.java Added a new class for browser lockdown responses.
src/main/java/com/testify/Testify_Backend/responses/exam_management/ExamResponse.java Added new fields for real-time monitoring, Zoom link, browser lockdown, and hosted status.
src/main/java/com/testify/Testify_Backend/responses/exam_management/HostedResponse.java Added a new class for hosted status responses.
src/main/java/com/testify/Testify_Backend/responses/exam_management/ModeratorResponse.java Added a new class for moderator response data.
src/main/java/com/testify/Testify_Backend/responses/exam_management/QuestionResponse.java Added a new field for comments in question responses.
src/main/java/com/testify/Testify_Backend/responses/exam_management/RealTimeMonitoringResponse.java Added a new class for real-time monitoring responses.
src/main/java/com/testify/Testify_Backend/responses/examsetter_management/ModerateExamResponse.java Added a new class for moderate exam responses.
src/main/java/com/testify/Testify_Backend/service/AuthenticationService.java Updated the register method to include email sending functionality after user registration.
src/main/java/com/testify/Testify_Backend/service/CandidateService.java Added a new method to retrieve all candidates for search purposes.
src/main/java/com/testify/Testify_Backend/service/EmailSenderImpl.java Restored email sending functionality in the send method.
src/main/java/com/testify/Testify_Backend/service/ExamManagementService.java Added several new methods for managing exam functionalities including monitoring and moderator assignments.
src/main/java/com/testify/Testify_Backend/service/ExamManagementServiceImpl.java Enhanced exam management with new methods for monitoring, lockdown, hosting, and comment management.
src/main/java/com/testify/Testify_Backend/service/ExamSetterService.java Added a new method to retrieve exams moderated by a specific exam setter.
src/main/java/com/testify/Testify_Backend/service/ExamSetterServiceImpl.java Implemented the method to get moderating exams using the ExamRepository.

Possibly related PRs

🐰 In the land of exams, where knowledge grows,
New features sprout, as the rabbit knows.
Real-time and lockdown, oh what a delight,
With comments and moderators, all feels just right!
So hop along, friends, to the code we shall cheer,
For the magic of learning is finally here! 🐇✨


📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between b227916 and 09a7f9c.

📒 Files selected for processing (5)
  • src/main/java/com/testify/Testify_Backend/controller/ExamManagementController.java (2 hunks)
  • src/main/java/com/testify/Testify_Backend/model/Exam.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/repository/QuestionRepository.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/CandidateService.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/ExamManagementServiceImpl.java (6 hunks)

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@tharindra26 tharindra26 merged commit 3e45b22 into main Dec 3, 2024
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Actionable comments posted: 19

🧹 Outside diff range and nitpick comments (16)
src/main/java/com/testify/Testify_Backend/repository/ExamRepository.java (1)

34-35: Add Javadoc documentation for the new method.

Please add documentation to describe the method's purpose, parameters, and return value.

+    /**
+     * Retrieves all exams assigned to a specific moderator.
+     *
+     * @param moderatorId the ID of the moderator
+     * @return list of exams moderated by the specified moderator
+     */
     List<Exam> findByModeratorId(long moderatorId);
src/main/java/com/testify/Testify_Backend/service/EmailSenderImpl.java (1)

Line range hint 1-42: Consider implementing a more flexible email service architecture.

Given that this email service is used by multiple components (AuthenticationService and ExamManagementServiceImpl), consider these architectural improvements:

  1. Implement an email template system
  2. Support different email types (confirmation, notification, alerts)
  3. Add email queuing for better scalability

Would you like me to provide a detailed design proposal for these improvements?

src/main/java/com/testify/Testify_Backend/responses/exam_management/QuestionResponse.java (2)

17-17: Consider adding validation and documentation for the comment field

While the addition of the comment field is straightforward, consider these improvements:

  1. Add validation constraints (e.g., @Size(max=...)) to prevent excessively long comments
  2. Add Javadoc to document the purpose and usage of comments in the context of exam questions

Example implementation:

+    /**
+     * Optional feedback or notes provided by moderators/exam setters for this question.
+     * This field is used to store review comments, improvement suggestions, or general notes.
+     */
+    @Size(max = 1000, message = "Comment cannot exceed 1000 characters")
     private String comment; // New attribute

Line range hint 13-14: Consider using enums for questionType and difficultyLevel

Currently using Strings for fixed-value fields. Consider converting these to proper enum types for better type safety and maintainability.

Example implementation:

public enum QuestionType {
    MCQ, ESSAY
}

public enum DifficultyLevel {
    EASY, MEDIUM, HARD
}

Then update the fields:

-    private String questionType; // "MCQ" or "Essay"
-    private String difficultyLevel; // "EASY", "MEDIUM" or "HARD"
+    private QuestionType questionType;
+    private DifficultyLevel difficultyLevel;
src/main/java/com/testify/Testify_Backend/model/Question.java (1)

36-37: Consider additional implementation details

Since this is a new field that can be null:

  1. Consider adding validation rules in the service layer if there are any business rules around when comments can be added/modified
  2. Update relevant documentation/API specs to reflect this new field
  3. Consider adding appropriate indexes if you plan to query by comments
src/main/java/com/testify/Testify_Backend/responses/exam_management/RealTimeMonitoringResponse.java (1)

5-10: Add class-level documentation.

Please add Javadoc documentation to describe the purpose and usage of this response class, including details about when it's used in the API.

 @Builder
+/**
+ * Response class for real-time monitoring status of an exam.
+ * Used by the exam management API to return monitoring status and associated Zoom meeting details.
+ */
 public class RealTimeMonitoringResponse {
src/main/java/com/testify/Testify_Backend/service/AuthenticationService.java (2)

220-223: Enhance email template with HTML formatting and security information

The current email template is plain text and lacks important security information that could help prevent phishing attacks.

Consider enhancing the email template with:

  1. HTML formatting for better presentation
  2. Security tips (e.g., "Never share this link")
  3. Contact information for support
  4. Your organization's logo and branding

Example implementation:

     private String buildEmail(String name, String link) {
-        return "Hi " + name + ",\n\n" +
-                "Thank you for registering. Please click on the link below to activate your account:\n\n" +
-                link + "\n\n" +
-                "The link will expire in 15 minutes.\n\n" +
-                "See you soon.";
+        return """
+                <html>
+                <body style="font-family: Arial, sans-serif; padding: 20px;">
+                    <div style="max-width: 600px; margin: 0 auto;">
+                        <h2>Welcome to Testify!</h2>
+                        <p>Hi %s,</p>
+                        <p>Thank you for registering. Please click the button below to activate your account:</p>
+                        <p style="text-align: center;">
+                            <a href="%s" style="background-color: #4CAF50; color: white; padding: 14px 20px; text-decoration: none; border-radius: 4px;">
+                                Activate Account
+                            </a>
+                        </p>
+                        <p><strong>Important Security Notes:</strong></p>
+                        <ul>
+                            <li>This link will expire in 15 minutes</li>
+                            <li>Never share this link with anyone</li>
+                            <li>We will never ask for your password via email</li>
+                        </ul>
+                        <p>If you didn't create this account, please ignore this email.</p>
+                        <p>Need help? Contact our support team at support@testify.com</p>
+                    </div>
+                </body>
+                </html>
+                """.formatted(name, link);

Also, update the EmailSender interface to specify that it accepts HTML content:

void send(String to, String htmlContent);

Also applies to: 291-295


Line range hint 1-400: Consider refactoring the registration flow for better maintainability

The register method is handling multiple concerns and has grown quite large. This makes it harder to maintain and test.

Consider the following architectural improvements:

  1. Extract user creation logic into separate services for each role:
@Service
public class CandidateRegistrationService {
    public User registerCandidate(RegistrationRequest request) {
        // Candidate-specific registration logic
    }
}

@Service
public class ExamSetterRegistrationService {
    public User registerExamSetter(RegistrationRequest request) {
        // ExamSetter-specific registration logic
    }
}
  1. Move verification document handling to a dedicated service:
@Service
public class VerificationDocumentService {
    public void handleVerificationDocuments(Organization org, MultipartFile[] documents) {
        // Document handling logic
    }
}
  1. Make the token expiration time configurable:
# application.properties
app.security.token.expiration-minutes=15

Would you like me to help create these service classes or open issues to track these improvements?

src/main/java/com/testify/Testify_Backend/service/ExamSetterService.java (1)

16-17: Consider adding method documentation.

The method signature is clear and appropriate. Consider adding Javadoc to document the purpose, parameters, and return value.

+    /**
+     * Retrieves a list of exams being moderated by a specific exam setter.
+     * @param examSetterId The ID of the exam setter
+     * @return List of exams being moderated by the exam setter
+     */
     List<ModerateExamResponse> getModeratingExams(long examSetterId);
src/main/java/com/testify/Testify_Backend/controller/ExamManagementController.java (1)

198-273: Consider Implementing a Global Exception Handler

The repetitive exception handling code across multiple endpoints suggests the need for a centralized approach. Implementing a global exception handler using @ControllerAdvice can improve maintainability and reduce code duplication.

src/main/java/com/testify/Testify_Backend/service/ExamManagementServiceImpl.java (2)

1201-1378: Consider Centralizing Exception Handling in Service Layer

Multiple service methods lack consistent exception handling. Implement a strategy to handle exceptions centrally, which enhances code maintainability and consistency.


1275-1310: Optimize Email Notifications to Candidates

In the notifyCandidates method, sending emails inside a loop may be inefficient and could lead to performance issues. Consider batching email sends or using asynchronous processing.

src/main/java/com/testify/Testify_Backend/model/Exam.java (2)

105-116: Add documentation for new monitoring and control fields.

Please add Javadoc comments to explain:

  • The purpose and behavior of each new field
  • Any dependencies between fields (e.g., realTimeMonitoring and zoomLink)
  • Valid values and constraints

Example:

/**
 * Indicates if real-time monitoring is enabled for this exam.
 * When enabled, proctors can monitor candidates through the zoomLink.
 */
@Column(nullable = false)
private boolean realTimeMonitoring = false;

105-116: Consider enforcing logical constraints between monitoring fields.

The relationship between these fields needs validation:

  • realTimeMonitoring likely requires a valid zoomLink
  • browserLockdown might be required when realTimeMonitoring is enabled

Consider adding a validation method:

@PrePersist
@PreUpdate
private void validateMonitoringConstraints() {
    if (realTimeMonitoring && (zoomLink == null || zoomLink.trim().isEmpty())) {
        throw new IllegalStateException("Real-time monitoring requires a Zoom link");
    }
}
src/main/java/com/testify/Testify_Backend/service/ExamManagementService.java (2)

53-54: Add documentation for real-time monitoring methods.

Please add Javadoc comments explaining:

  • Expected behavior
  • Parameter constraints
  • Error conditions

Example:

/**
 * Updates the real-time monitoring settings for an exam.
 *
 * @param examId ID of the exam to update
 * @param dto Contains monitoring settings including Zoom link
 * @return GenericResponse indicating success or failure
 * @throws ExamNotFoundException if exam doesn't exist
 * @throws UnauthorizedException if user lacks permission
 */
GenericResponse updateRealTimeMonitoring(Long examId, RealTimeMonitoringRequest dto);

65-65: Consider versioning for question comments.

The question comment update method should potentially track comment history for audit purposes.

Consider extending the functionality:

/**
 * Updates a question's comment while maintaining version history.
 *
 * @param questionId ID of the question
 * @param comment New comment text
 * @return Response containing the updated comment with version info
 */
GenericAddOrUpdateResponse<QuestionCommentResponse> updateQuestionComment(
    Long questionId, 
    String comment
);
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between a9dd33b and b227916.

📒 Files selected for processing (26)
  • src/main/java/com/testify/Testify_Backend/controller/ExamManagementController.java (2 hunks)
  • src/main/java/com/testify/Testify_Backend/controller/ExamSetterController.java (2 hunks)
  • src/main/java/com/testify/Testify_Backend/model/Exam.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/model/ExamSetter.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/model/Question.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/repository/CandidateRepository.java (0 hunks)
  • src/main/java/com/testify/Testify_Backend/repository/ExamRepository.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/repository/QuestionRepository.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/requests/exam_management/ModeratorRequest.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/requests/exam_management/QuestionCommentRequest.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/requests/exam_management/RealTimeMonitoringRequest.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/GenericResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/BrowserLockdownResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/ExamResponse.java (2 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/HostedResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/ModeratorResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/QuestionResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/RealTimeMonitoringResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/responses/examsetter_management/ModerateExamResponse.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/AuthenticationService.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/CandidateService.java (0 hunks)
  • src/main/java/com/testify/Testify_Backend/service/EmailSenderImpl.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/ExamManagementService.java (1 hunks)
  • src/main/java/com/testify/Testify_Backend/service/ExamManagementServiceImpl.java (6 hunks)
  • src/main/java/com/testify/Testify_Backend/service/ExamSetterService.java (2 hunks)
  • src/main/java/com/testify/Testify_Backend/service/ExamSetterServiceImpl.java (2 hunks)
💤 Files with no reviewable changes (2)
  • src/main/java/com/testify/Testify_Backend/repository/CandidateRepository.java
  • src/main/java/com/testify/Testify_Backend/service/CandidateService.java
✅ Files skipped from review due to trivial changes (6)
  • src/main/java/com/testify/Testify_Backend/model/ExamSetter.java
  • src/main/java/com/testify/Testify_Backend/requests/exam_management/ModeratorRequest.java
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/BrowserLockdownResponse.java
  • src/main/java/com/testify/Testify_Backend/responses/exam_management/HostedResponse.java
  • src/main/java/com/testify/Testify_Backend/requests/exam_management/QuestionCommentRequest.java
  • src/main/java/com/testify/Testify_Backend/responses/examsetter_management/ModerateExamResponse.java
🔇 Additional comments (15)
src/main/java/com/testify/Testify_Backend/repository/ExamRepository.java (1)

34-35: The method implementation follows Spring Data JPA conventions.

The new query method is correctly defined following Spring Data JPA naming conventions.

src/main/java/com/testify/Testify_Backend/responses/GenericResponse.java (1)

12-13: Verify impact of breaking changes

The removal of the code and content fields represents breaking changes that could impact existing API consumers. The content field removal particularly limits the class's ability to carry response data.

Consider:

  1. Maintaining backward compatibility through versioning
  2. Adding a replacement for the generic content field
  3. Documenting migration steps for API consumers

Let's verify the usage of these fields across the codebase:

src/main/java/com/testify/Testify_Backend/service/EmailSenderImpl.java (1)

22-22: LGTM! Constructor injection is properly implemented.

The dependency injection approach using constructor injection with @AllArgsConstructor follows Spring best practices.

src/main/java/com/testify/Testify_Backend/responses/exam_management/QuestionResponse.java (2)

Line range hint 7-11: LGTM! Well-structured response class

The class follows best practices with appropriate Lombok annotations and builder pattern implementation.


Line range hint 1-20: Verify integration with ExamManagementController

Let's confirm that the new comment field is properly handled in the related controller endpoint.

✅ Verification successful

Integration with comment field is properly implemented

The codebase shows complete integration of the comment field:

  • ExamManagementController has a dedicated endpoint /question/comment to handle comment updates
  • ExamManagementServiceImpl properly sets and retrieves the comment field in:
    • updateQuestionComment method for updating comments
    • Question response builder includes comment in the response mapping
  • Full service-to-controller integration is present with proper request/response handling
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for the question comment endpoint implementation
ast-grep --pattern 'class ExamManagementController {
  $$$
  @$_($$$)
  $_($$$) updateQuestionComment($$$) {
    $$$
  }
  $$$
}'

# Search for any direct usage of QuestionResponse's comment field
rg -l "QuestionResponse.*comment" --type java

Length of output: 179


Script:

#!/bin/bash
# Let's first find the ExamManagementController file
fd "ExamManagementController.java"

# Search for any method that handles question updates
rg -A 5 "updateQuestion|saveQuestion|createQuestion" --type java

# Let's also check for any service layer handling of question comments
rg -A 5 "question.*comment|comment.*question" --type java

# Check for any QuestionResponse usage
rg -A 3 "QuestionResponse" --type java

Length of output: 13850

src/main/java/com/testify/Testify_Backend/repository/QuestionRepository.java (2)

9-9: LGTM: Import addition is appropriate

The Optional import is required for the new method's return type.


15-15: LGTM: Well-designed repository method

The new method follows Spring Data JPA naming conventions and maintains consistency with the existing soft delete pattern. Using Optional as the return type is appropriate for single-result queries.

Let's verify the usage of this method:

✅ Verification successful

Method implementation and usage verified successfully

The method is correctly used in ExamManagementServiceImpl where it:

  • Properly handles the Optional return type using orElseThrow
  • Provides appropriate error messaging when question is not found
  • Maintains the soft-delete pattern as intended
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for usages of the new method to ensure it's being utilized appropriately
rg -l "findByIdAndIsDeletedFalse" --type java

Length of output: 203


Script:

#!/bin/bash
# Let's check how the method is used in the service implementation
rg "findByIdAndIsDeletedFalse" src/main/java/com/testify/Testify_Backend/service/ExamManagementServiceImpl.java -B 2 -A 2

Length of output: 394

src/main/java/com/testify/Testify_Backend/model/Question.java (1)

36-37: Consider code organization improvements

  1. The inline comment "// New attribute" is unnecessary and should be removed as version control already tracks changes.
  2. Consider grouping this field with other similar attributes for better code organization.
-    @Column
-    private String comment; // New attribute
+    @Column
+    private String comment;

Let's check for database migration scripts:

src/main/java/com/testify/Testify_Backend/controller/ExamManagementController.java (4)

221-231: 🛠️ Refactor suggestion

Standardize Exception Handling and Avoid Exposing Internal Errors

In the updateBrowserLockdown method, similar to previous methods, returning the exception message may expose sensitive information. Consistently handle exceptions by logging and returning generic error messages.

Apply this diff:

} catch (Exception ex) {
-    return ResponseEntity.status(500).body(new GenericResponse("false", "Error: " + ex.getMessage()));
+    log.error("Failed to update browser lockdown for examId {}: {}", examId, ex.getMessage());
+    return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+            .body(new GenericResponse("false", "An unexpected error occurred while updating browser lockdown."));
}

233-241: ⚠️ Potential issue

Avoid Returning null on Exception and Provide Meaningful Responses

In the getBrowserLockdown method, returning null upon catching an exception may cause issues for the client. Return a meaningful response instead.

Apply this diff:

} catch (Exception ex) {
-    return ResponseEntity.status(500).body(null); // Handle errors gracefully
+    log.error("Failed to retrieve browser lockdown status for examId {}: {}", examId, ex.getMessage());
+    BrowserLockdownResponse errorResponse = new BrowserLockdownResponse(false);
+    return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
}

243-251: 🛠️ Refactor suggestion

Consistent Exception Handling and Security

In the updateHosted method, ensure exceptions are handled consistently to prevent exposure of sensitive information.

Apply this diff:

} catch (Exception ex) {
-    return ResponseEntity.status(500).body(new GenericResponse("false", "Error: " + ex.getMessage()));
+    log.error("Failed to update hosted status for examId {}: {}", examId, ex.getMessage());
+    return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+            .body(new GenericResponse("false", "An unexpected error occurred while updating hosted status."));
}

253-262: ⚠️ Potential issue

Return Valid Responses Instead of null on Exception

In getHosted, avoid returning null in the response body when exceptions occur. Provide a default response and log the exception.

Apply this diff:

} catch (Exception ex) {
-    return ResponseEntity.status(500).body(null);
+    log.error("Failed to retrieve hosted status for examId {}: {}", examId, ex.getMessage());
+    HostedResponse errorResponse = new HostedResponse(false);
+    return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
}
src/main/java/com/testify/Testify_Backend/responses/exam_management/ModeratorResponse.java (1)

1-14: LGTM!

The ModeratorResponse class is well-defined with appropriate fields and annotations.

src/main/java/com/testify/Testify_Backend/requests/exam_management/RealTimeMonitoringRequest.java (1)

1-15: LGTM!

The RealTimeMonitoringRequest class is correctly implemented with necessary fields and Lombok annotations.

src/main/java/com/testify/Testify_Backend/responses/exam_management/ExamResponse.java (1)

35-38: Ensure Consistency in JSON Serialization

Verify that the newly added boolean fields (realTimeMonitoring, browserLockdown, hosted) and zoomLink are correctly serialized/deserialized in JSON responses.

Run the following script to check if the fields are included and correctly named in the JSON output:

✅ Verification successful

No JSON serialization issues expected

The class uses Lombok annotations (@Getter, @Setter, @AllArgsConstructor, @NoArgsConstructor, @Builder) which automatically generates standard getters and setters. In Spring Boot applications with default configuration:

  • All fields will be automatically serialized using their exact names
  • Boolean fields will be correctly serialized as JSON booleans
  • String fields will be correctly serialized as JSON strings

The class follows standard Java naming conventions and doesn't use any custom JSON annotations, which means the default Jackson serialization will work correctly for all fields including the newly added ones:

  • realTimeMonitoring"realTimeMonitoring": boolean
  • zoomLink"zoomLink": string
  • browserLockdown"browserLockdown": boolean
  • hosted"hosted": boolean
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check JSON serialization of ExamResponse fields

# Assuming the project uses Jackson for JSON serialization
# Search for @JsonProperty annotations or any custom serializers

rg '@JsonProperty|@JsonSerialize|@JsonDeserialize' src/main/java/com/testify/Testify_Backend/responses/exam_management/ExamResponse.java

# Alternatively, check for custom getters/setters that may affect serialization

Length of output: 138


Script:

#!/bin/bash
# Let's first check the entire content of the ExamResponse.java file
cat src/main/java/com/testify/Testify_Backend/responses/exam_management/ExamResponse.java

# Also check for any Jackson annotations in the parent classes if this class extends another
rg -l "class.*ExamResponse.*extends" src/main/java/com/testify/Testify_Backend/responses/exam_management/

# Check for any custom serialization configurations in the Spring configuration files
fd -e java -e xml -e properties -e yml | xargs rg -l "ObjectMapper|Jackson"

Length of output: 1382

Comment on lines +34 to +35

List<Exam> findByModeratorId(long moderatorId);
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🛠️ Refactor suggestion

Consider adding pagination and sorting support.

For better scalability and performance, consider modifying the method to support pagination and sorting, especially if the number of exams per moderator could be large.

-    List<Exam> findByModeratorId(long moderatorId);
+    Page<Exam> findByModeratorId(long moderatorId, Pageable pageable);

Usage example in service layer:

Pageable pageable = PageRequest.of(0, 10, Sort.by("startDatetime").descending());
Page<Exam> moderatorExams = examRepository.findByModeratorId(moderatorId, pageable);

@Data
public class GenericResponse {
private String code;
private String success;
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🛠️ Refactor suggestion

Consider using Boolean for the 'success' field

The success field would be more appropriately typed as boolean rather than String, as it represents a binary state (success/failure). This would:

  • Provide type safety
  • Make the API more intuitive
  • Prevent invalid string values
-    private String success;
+    private boolean success;
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
private String success;
private boolean success;

Comment on lines +27 to +39
try {
MimeMessage mimeMessage = mailSender.createMimeMessage();
MimeMessageHelper helper =
new MimeMessageHelper(mimeMessage, "utf-8");
helper.setText(email, true);
helper.setTo(to);
helper.setSubject("Confirm your email");
helper.setFrom("hello@amigoscode.com");
mailSender.send(mimeMessage);
} catch (MessagingException e) {
LOGGER.error("failed to send email", e);
throw new IllegalStateException("failed to send email");
}
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🛠️ Refactor suggestion

Several improvements needed in the email sending implementation.

  1. The subject and from address are hardcoded, which limits flexibility and reusability
  2. The error handling could be more specific to different types of messaging exceptions
  3. Missing input validation for the 'to' and 'email' parameters
  4. No logging for successful email sending

Consider applying these improvements:

 @Override
 @Async
 public void send(String to, String email) {
+    if (to == null || to.isEmpty() || email == null || email.isEmpty()) {
+        throw new IllegalArgumentException("Email recipient and content cannot be null or empty");
+    }
     try {
         MimeMessage mimeMessage = mailSender.createMimeMessage();
         MimeMessageHelper helper =
                 new MimeMessageHelper(mimeMessage, "utf-8");
         helper.setText(email, true);
         helper.setTo(to);
-        helper.setSubject("Confirm your email");
-        helper.setFrom("hello@amigoscode.com");
+        helper.setSubject(emailProperties.getSubject());
+        helper.setFrom(emailProperties.getFromAddress());
         mailSender.send(mimeMessage);
+        LOGGER.info("Successfully sent email to: {}", to);
     } catch (MessagingException e) {
         LOGGER.error("failed to send email", e);
-        throw new IllegalStateException("failed to send email");
+        throw new EmailSendingException("Failed to send email: " + e.getMessage(), e);
     }

Additional changes needed:

  1. Create an EmailProperties configuration class
  2. Create a custom EmailSendingException class
  3. Add the following properties to application.properties:
email.subject=Confirm your email
email.from-address=hello@amigoscode.com

LOGGER.error("failed to send email", e);
throw new IllegalStateException("failed to send email");
}
System.out.println("Skipping email sending during development.");
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⚠️ Potential issue

Remove misleading development skip message.

The print statement contradicts the actual behavior of the code. If development mode is needed, consider these alternatives:

  1. Use a configuration property to control email sending
  2. Use Spring profiles to manage different environments

Here's a suggested implementation:

-    System.out.println("Skipping email sending during development.");

Add to application.properties:

email.enabled=true

And modify the send method:

 @Override
 @Async
 public void send(String to, String email) {
+    if (!emailProperties.isEnabled()) {
+        LOGGER.info("Email sending is disabled. Skipping email to: {}", to);
+        return;
+    }
     try {
         // ... existing code ...

Comment on lines +11 to +12
private boolean realTimeMonitoring;
private String zoomLink;
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🛠️ Refactor suggestion

Consider adding field validation and documentation.

The fields need documentation and potential validation:

  1. The zoomLink field could be null when real-time monitoring is disabled
  2. The format and security implications of the Zoom link should be documented
+    /**
+     * Indicates whether real-time monitoring is enabled for the exam.
+     */
     private boolean realTimeMonitoring;
+    
+    /**
+     * The Zoom meeting link for real-time monitoring.
+     * This field may be null when real-time monitoring is disabled.
+     */
+    @Builder.Default
     private String zoomLink;

Additionally, consider:

  1. Adding validation to ensure the Zoom link follows a valid format
  2. Implementing security measures to prevent unauthorized access to Zoom meetings

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +828 to +835
// Convert grades to responses, even if the list is empty
List<GradeResponse> gradeResponses = grades.stream()
.map(grade -> new GradeResponse(grade.getId(), grade.getGrade(), grade.getMinMarks(), grade.getMaxMarks()))
.collect(Collectors.toList());

return ResponseEntity.ok(gradeResponses);
} catch (RuntimeException ex) {
return ResponseEntity.status(HttpStatus.NOT_FOUND).body(null);
} catch (Exception ex) {
log.error("An error occurred while fetching grades for examId {}: {}", examId, ex.getMessage());
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⚠️ Potential issue

Return Appropriate Error Responses Instead of null

In getGradesByExamId, when an exception occurs, returning null may lead to client-side errors. Consider returning an error message or an empty list.

Apply this diff:

} catch (Exception ex) {
    log.error("An error occurred while fetching grades for examId {}: {}", examId, ex.getMessage());
-   return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
+   return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+           .body(Collections.emptyList()); // Return an empty list or an appropriate error response
}

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +1201 to +1225
@Transactional
public GenericResponse updateRealTimeMonitoring(Long examId, RealTimeMonitoringRequest dto) {
// Fetch the exam by ID
Exam exam = examRepository.findById(examId)
.orElseThrow(() -> new RuntimeException("Exam not found with ID: " + examId));

// Update the fields
exam.setRealTimeMonitoring(dto.isRealTimeMonitoring());
if (dto.isRealTimeMonitoring()) {
// If activating, set the Zoom link
exam.setZoomLink(dto.getZoomLink());
} else {
// If deactivating, clear the Zoom link
exam.setZoomLink(null);
}

// Save the updated exam
examRepository.save(exam);

// Create and return a success response
String message = dto.isRealTimeMonitoring() ?
"Real-time monitoring activated successfully." :
"Real-time monitoring deactivated successfully.";
return new GenericResponse("true", message);
}
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🛠️ Refactor suggestion

Add Exception Handling to Service Methods and Log Errors

In updateRealTimeMonitoring, exceptions are not caught, which may lead to unhandled exceptions and unclear error propagation. It's advisable to handle exceptions, log them, and return meaningful responses.

Apply this diff:

public GenericResponse updateRealTimeMonitoring(Long examId, RealTimeMonitoringRequest dto) {
+   try {
        // Existing logic
+   } catch (Exception ex) {
+       log.error("Failed to update real-time monitoring for examId {}: {}", examId, ex.getMessage());
+       return new GenericResponse("false", "An unexpected error occurred while updating real-time monitoring.");
+   }
}

Committable suggestion skipped: line range outside the PR's diff.

Comment on lines +108 to +110
@Column
private String zoomLink;

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🛠️ Refactor suggestion

Add validation for zoomLink format.

The zoomLink field should be validated to ensure it contains a valid Zoom meeting URL.

Consider adding validation:

@Pattern(regexp = "^https?://[a-zA-Z0-9-.]+\\.zoom\\.us/[a-zA-Z0-9-/]+$", 
         message = "Invalid Zoom meeting URL format")
@Column
private String zoomLink;

Comment on lines +62 to +63
void assignModerator(Long examId, String moderatorEmail);
ModeratorResponse getModeratorDetails(Long examId);
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⚠️ Potential issue

Add security validation for moderator assignment.

The moderator assignment method needs careful security consideration:

  • Verify the moderator's permissions
  • Validate email format
  • Handle existing moderator cases

Consider updating the method signature to include validation:

/**
 * Assigns a moderator to an exam after validating permissions.
 *
 * @param examId ID of the exam
 * @param moderatorEmail Email of the user to be assigned as moderator
 * @throws UnauthorizedException if the current user lacks permission
 * @throws InvalidModeratorException if the email is invalid or user lacks moderator role
 */
void assignModerator(Long examId, String moderatorEmail);

Comment on lines +56 to +60
GenericResponse updateBrowserLockdown(Long examId, boolean browserLockdown);
boolean getBrowserLockdownStatus(Long examId);

GenericResponse updateHostedStatus(Long examId, boolean hosted);
boolean getHostedStatus(Long examId);
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🛠️ Refactor suggestion

Add validation for state transitions in exam settings.

The browser lockdown and hosted status updates should validate the exam's current state:

  • Prevent changes during active exams
  • Ensure proper state transitions

Consider adding validation parameters:

GenericResponse updateBrowserLockdown(
    Long examId, 
    boolean browserLockdown,
    boolean force  // For administrative override
);

GenericResponse updateHostedStatus(
    Long examId,
    boolean hosted,
    ExamStateValidation validation  // Custom validation rules
);

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3 participants