96 lines
3.2 KiB
C#
96 lines
3.2 KiB
C#
using System;
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namespace AibisDream
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{
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public enum GameSessionPhase
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{
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MainMenu,
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Starting,
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Transitioning,
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Restoring,
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Playing,
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ReturningToMenu
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}
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/// <summary>
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/// 单次游戏会话的纯状态模型。它不执行流程，也不发送全局事件。
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/// </summary>
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public sealed class GameSession
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{
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public GameSessionPhase Phase { get; private set; } = GameSessionPhase.MainMenu;
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public TalkSceneSO CurrentTalkScene { get; private set; }
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public bool IsPaused { get; private set; }
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public bool IsDialogueActive { get; private set; }
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public bool IsActive => Phase != GameSessionPhase.MainMenu;
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public bool IsBusy => Phase is GameSessionPhase.Starting
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or GameSessionPhase.Transitioning
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or GameSessionPhase.Restoring
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or GameSessionPhase.ReturningToMenu;
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public bool CanPause => Phase == GameSessionPhase.Playing && !IsPaused;
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public bool CanResume => Phase == GameSessionPhase.Playing && IsPaused;
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public bool CanAdvanceDialogue => Phase == GameSessionPhase.Playing && IsDialogueActive && !IsPaused;
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internal bool TryTransitionTo(GameSessionPhase next, out string error)
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{
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if (Phase == next)
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{
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error = null;
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return true;
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}
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if (!IsTransitionAllowed(Phase, next))
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{
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error = $"Illegal game session transition: {Phase} -> {next}";
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return false;
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}
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Phase = next;
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error = null;
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return true;
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}
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internal void SetCurrentTalkScene(TalkSceneSO scene)
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{
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CurrentTalkScene = scene;
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}
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internal void SetPaused(bool paused)
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{
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IsPaused = paused;
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}
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internal void SetDialogueActive(bool active)
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{
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IsDialogueActive = active;
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}
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internal void ResetRuntimeState()
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{
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CurrentTalkScene = null;
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IsPaused = false;
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IsDialogueActive = false;
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}
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private static bool IsTransitionAllowed(GameSessionPhase current, GameSessionPhase next)
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{
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return current switch
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{
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GameSessionPhase.MainMenu => next is GameSessionPhase.Starting or GameSessionPhase.Restoring,
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GameSessionPhase.Starting => next is GameSessionPhase.Playing or GameSessionPhase.ReturningToMenu,
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GameSessionPhase.Transitioning => next is GameSessionPhase.Playing or GameSessionPhase.ReturningToMenu,
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GameSessionPhase.Restoring => next is GameSessionPhase.Playing
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or GameSessionPhase.MainMenu
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or GameSessionPhase.ReturningToMenu,
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GameSessionPhase.Playing => next is GameSessionPhase.Transitioning
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or GameSessionPhase.Restoring
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or GameSessionPhase.ReturningToMenu,
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GameSessionPhase.ReturningToMenu => next == GameSessionPhase.MainMenu,
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_ => throw new ArgumentOutOfRangeException(nameof(current), current, null)
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};
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}
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}
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}
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