Development: Integrate fast authorization checks into websocket configuration

[MaximilianAnzinger]

Checklist

General

• I chose a title conforming to the naming conventions for pull requests.

Server

• Important: I implemented the changes with a very good performance and prevented too many (unnecessary) database calls.
• I strictly followed the server coding and design guidelines.
• I documented the Java code using JavaDoc style.

Motivation and Context

Utilize fast authorization checks for websocket configuration to improve performance when accepting subscriptions.

Testserver States

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Review Progress

Performance Review

• I (as a reviewer) confirm that the server changes (in particular related to database calls) are implemented with a very good performance

Code Review

• Code Review 1
• Code Review 2

Test Coverage

Server

Class/File	Line Coverage	Confirmation (assert/expect)
WebsocketConfiguration.java	65%	✅
ExerciseRepository.java	66%	✅
UserRepository.java	87%	✅
AuthorizationCheckService.java	87%	✅
ResultWebsocketService.java	100%	✅

Summary by CodeRabbit

Summary by CodeRabbit

• New Features
  • Enhanced user authorization checks to ensure users have the appropriate roles in courses and exercises.
  • Introduced a method to verify if an exercise is part of an exam.
  • Added capability to check if a user is an admin directly from their login.
• Refactor
  • Improved websocket configuration for better service integration.
  • Streamlined repository access with updated method signatures and simplified import statements.
  • Upgraded null handling in websocket services with the use of Optional for exercise ID extraction.

[coderabbitai]

Walkthrough

The recent updates focus on enhancing the codebase related to websocket configurations, repository access, and authorization checks within a Java application. Key modifications include refining import statements, introducing method enhancements for better user and exercise query handling, and improving null handling with Optional. These changes aim to streamline data access and user verification processes, contributing to more robust and maintainable code.

Changes

File(s)	Summary
.../websocket/WebsocketConfiguration.java .../repository/ExerciseRepository.java .../websocket/ResultWebsocketService.java	Updated imports, refined variable declarations, added method enhancements, improved method references, and introduced Optional for null handling.
.../repository/UserRepository.java	Simplified imports, added isAdmin method for admin status verification.
.../service/AuthorizationCheckService.java	Added methods to check user roles in courses or exercises.

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[rstief]

Code looks good 👍

rabbit doing rabbit things

[JohannesWt]

Code looks good