3. Domain Model and Use Cases

THe following image shows the domain model for the Sokoban project. By clicking on it, you can view it in detail.

The domain model captures the following core ideas:

• session-based gameplay architecture: A GameServerBackend manages multiple UserSessions, which create or join GameSessions controlled and validated by a central GameEngine and configured via GameModeType.

• the system centers around the player: Each Player has their own PlayerPreferences, that consist of ControlSettings, AudioVisualSettings and AccessibilitySettings. Additionaly, a Player gets their own PlayerStatistics, and participates in one or more GameSessions, in which they control a SokobanCharacter. If the user plays a ranked match, they will also be part of a Leaderboard.

• the Sokoverse game world: Every GameSession contains a GameBoard composed of multiple Tiles and GameObjects (Wall, SokobanCharacter, Box), that each have a Position on the gameboard.

• effects: The Effects, that are contained in some of the boxes, are either of type PowerUp or PowerDown.

• progress and match outcomes: GameSessions produce a Score for each participating Player and a GameResult, which in case of ranked mode feed into a Leaderboard with individual LeaderboardEntries.

• AI assistance: An AiAssistant can support players in non-competitive matches by generating Hint``s within a ``GameSession.

• level creation: A LevelDesigner builds and structures GameBoards and all the objects contained on the game boards Tiles.

The following use case diagram shows the the user interaction with the system on a high abstraction level: