DuoCodo

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Chapter 5: System Architecture ​

5.5 Class Diagrams ​

Class diagrams are structural diagrams that show the static structure of the system, including its classes, attributes, operations, and the relationships among objects. They provide a detailed view of the system's architecture and design.

Part 1: Core User and Authentication System ​

This section presents the foundational classes for user management, authentication, and authorization within the DuoCodo platform. It includes user roles, profile management, and security features.

Figure 5.41: Core User and Authentication System
Figure 5.41: Class Diagram - Core User and Authentication System

Part 2: Learning Content Management ​

This section illustrates the classes responsible for managing educational content, including courses, lessons, exercises, and learning paths. It shows how content is structured and organized within the platform.

Figure 5.42: Learning Content Management
Figure 5.42: Class Diagram - Learning Content Management

Part 3: Progress Tracking and Gamification ​

This section demonstrates the classes that handle learner progress tracking, gamification elements such as XP, achievements, badges, and leaderboards. It shows how the platform motivates and engages learners.

Figure 5.43: Progress Tracking and Gamification
Figure 5.43: Class Diagram - Progress Tracking and Gamification

Part 4: Social and Community Features ​

This section presents the classes that enable social interactions, including comments, discussions, friend connections, sharing capabilities, and community engagement features.

Figure 5.44: Social and Community Features
Figure 5.44: Class Diagram - Social and Community Features

Part 5: Assessment and Certification ​

This section shows the classes related to quizzes, assessments, certifications, and validation mechanisms. It demonstrates how the platform evaluates learner competency and awards credentials.

Figure 5.45: Assessment and Certification
Figure 5.45: Class Diagram - Assessment and Certification

Part 6: Administration and Platform Management ​

This section illustrates the classes responsible for platform administration, including system monitoring, analytics, content moderation, user management, and reporting capabilities.

Figure 5.46: Administration and Platform Management
Figure 5.46: Class Diagram - Administration and Platform Management

Key Design Patterns and Relationships ​

The class diagrams above illustrate several important design patterns and relationships:

  • Inheritance: User roles (Administrator, Content Creator, Learner) inherit from a base User class
  • Composition: Courses are composed of Lessons, which contain Exercises
  • Association: Many-to-many relationships between Learners and Courses through enrollment
  • Aggregation: Learning Paths aggregate multiple Courses
  • Dependency: Classes depend on authentication and authorization services

These diagrams provide a comprehensive view of the DuoCodo platform's architecture, showing how different components interact to deliver a complete learning experience.