432 lines
18 KiB
Markdown
432 lines
18 KiB
Markdown
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# 状态控制设计
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## 1. 整体架构
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```
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┌─────────────────────────────────────────────────────────────────┐
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│ Go Bridge (TSBridge) │
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│ onConnected / onDisconnected / onTextMessage / onClientEnter │
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│ onClientLeave / onClientMoved / onKicked / onVoiceData / onPoked│
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└──────────────────────────────┬──────────────────────────────────┘
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│ JNI 回调
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▼
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┌──────────────────────────────────────────────────────────────────┐
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│ ServerViewModel (协调者) │
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│ connectionState / serverInfo / kickReason / pokeNotification │
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│ 拥有其他 ViewModel 引用，分发事件 │
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└──────┬────────────┬────────────┬────────────┬────────────────────┘
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│ │ │ │
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▼ ▼ ▼ ▼
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┌───────────┐ ┌───────────┐ ┌───────────┐ ┌───────────┐
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│ ChannelVM │ │ ChatVM │ │ VoiceVM │ │ Repository│
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│ 频道列表 │ │ 文字聊天 │ │ 语音通信 │ │ (单例) │
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│ 频道切换 │ │ 消息归档 │ │ PTT控制 │ │ 数据仓库 │
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│ 未读状态 │ │ 送达确认 │ │ 说话检测 │ │ │
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└───────────┘ └───────────┘ └───────────┘ └───────────┘
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│ │ │ │
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▼ ▼ ▼ ▼
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┌──────────────────────────────────────────────────────────────────┐
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│ Compose UI (StateFlow collectAsState) │
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│ NavGraph → ChannelListScreen / ChatScreen / KickedScreen │
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└──────────────────────────────────────────────────────────────────┘
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```
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## 2. Repository（单例数据仓库）
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所有 ViewModel 共享的底层数据源。ViewModel 读取 Repository 的 StateFlow，事件处理通过 Repository 方法更新。
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```
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Repository (object)
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├── channels: StateFlow<List<ChannelInfo>> // 频道列表（低频，按需请求）
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├── clients: StateFlow<List<ClientInfo>> // 客户端列表（高频，人员变动全量刷新）
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├── channelClients: StateFlow<Map<String, List<ClientInfo>>> // 按频道索引（由 clients 派生）
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├── selfClientId: StateFlow<Int> // 自身客户端 ID
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├── currentChannelId: StateFlow<String> // 当前频道 ID
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├── serverInfo: StateFlow<ServerInfo?> // 服务器信息
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├── unreadCounts: StateFlow<Map<String, Int>> // 未读消息计数
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├── activeChatKey: String? // 当前查看的会话
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└── messageArchives: ConcurrentHashMap // 消息归档
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```
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**数据更新频率设计原则**：
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| 数据 | 变动频率 | SDK 事件支持 | 更新策略 |
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|------|---------|-------------|---------|
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| 频道列表 | 极低频 | 无事件 | 连接时全量请求一次，之后按需刷新（超5分钟过期检测） |
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| 客户端列表 | 高频 | Enter/Leave/Move | 每次事件全量刷新 `refreshClientList()` |
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| 频道树 | — | — | 不维护中间状态，UI 层直接从 channels + clients 实时计算 |
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**关键方法**：
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- `performInitialSync()` — 首次同步（串行请求频道列表、客户端列表、自身 ID）
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- `refreshClientList()` — 全量刷新客户端列表（人员变动时调用，高频）
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- `updateBaseline()` — 原子提交基线数据
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- `clearSession()` — 清理会话（断开连接时调用）
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- `archiveMessage()` — 归档消息
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- `confirmMessageDelivery()` — 匹配回显确认送达
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## 3. ViewModel 状态明细
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### 3.1 ServerViewModel — 连接与事件协调
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**职责**：管理连接生命周期、接收 Go Bridge 回调并分发给其他 ViewModel。
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```
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ServerViewModel
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├── state: StateFlow<ServerScreenState>
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│ ├── address / nickname / password // 输入字段
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│ ├── connectState: ConnectState // 连接按钮状态
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│ │ ├── IDLE 空闲，等待用户输入
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│ │ ├── CONNECTING 连接中
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│ │ ├── SUCCESS 连接成功（触发导航）
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│ │ ├── FAILED 连接失败
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│ │ └── TIMEOUT 连接超时
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│ └── errorMessage / validationErrors
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│
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├── connectionState: StateFlow<ConnectionState?>
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│ ├── null 未进入频道列表页
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│ ├── Connected 已连接
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│ ├── Disconnecting 断开中
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│ ├── Reconnecting 重连中（attempt, reason）
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│ └── Disconnected 已断开（reason, wasKicked）
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│
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├── serverInfo: StateFlow<ServerInfo?>
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├── kickReason: StateFlow<String>
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├── pokeNotification / showPokeNotification
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├── themeMode: StateFlow<ThemeMode>
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└── recents: StateFlow<List<RecentConnection>>
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```
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**Bridge 回调分发**：
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| 回调 | 分发目标 |
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|------|---------|
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| `onConnected` | `channelViewModel.performInitialSync()` → 导航到频道列表 |
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| `onDisconnected` | `Repository.clearSession()` + `channelViewModel.clearChannels()` + `chatViewModel.clearMessages()` |
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| `onTextMessage` | `chatViewModel.handleTextMessage()` + `channelViewModel.onTextMessage()` |
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| `onClientEnter` | `channelViewModel.handleClientEnter()` |
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| `onClientLeave` | `channelViewModel.handleClientLeave()` |
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| `onClientMoved` | `channelViewModel.handleClientMoved()` |
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| `onKicked` | `Repository.clearSession()` + 所有 ViewModel 清理 → 导航到 KickedScreen |
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| `onVoiceData` | `voiceViewModel.handleVoiceData()` |
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| `onPoked` | `serverViewModel.handlePoked()` |
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**ViewModel 引用**（由 NavGraph LaunchedEffect 设置）：
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```
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serverViewModel.channelViewModel = channelViewModel
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serverViewModel.chatViewModel = chatViewModel
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serverViewModel.voiceViewModel = voiceViewModel
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```
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### 3.2 ChannelViewModel — 频道列表与切换
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**职责**：管理同步状态、频道切换状态机、展开状态、未读指示。频道树不在 ViewModel 中维护，由 UI 层实时计算。
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```
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ChannelViewModel
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├── syncState: StateFlow<SyncState>
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│ ├── Unsynced 已连接但尚无完整数据（初始状态）
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│ ├── Syncing 正在调用 ListChannels / ListClients
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│ ├── Synchronized 列表基线可供 UI 使用
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│ └── SyncFailed 同步失败
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│
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├── channels: StateFlow<List<ChannelInfo>> // Repository 引用（低频）
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├── clients: StateFlow<List<ClientInfo>> // Repository 引用（高频）
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├── channelClients: StateFlow<Map<String, List<ClientInfo>>> // Repository 引用
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├── selfClientId: StateFlow<Int> // Repository 引用
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├── currentChannelId: StateFlow<String> // Repository 引用
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│
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├── expandedChannelIds: StateFlow<Set<String>> // 本地状态（初始同步时自动展开有成员的频道）
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├── hasUnreadMessage: StateFlow<Boolean> // 本地状态（当前频道外有新消息）
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│
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├── switchState: StateFlow<ChannelSwitchState>
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│ ├── Idle 空闲
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│ ├── Requesting 正在发送 ClientMove
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│ ├── WaitingServerEvent 等待 OnClientMoved 确认
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│ └── Failed 切换失败
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│
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├── showPasswordDialog / pendingSwitchChannel
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└── channelDetailInfo / showChannelDetailCard
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```
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**频道树构建（UI 层）**：
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UI 直接从源 StateFlow 实时计算，不维护中间状态：
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```kotlin
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// ChannelListScreen
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val tree = remember(channels, clients, expandedChannelIds) {
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channelViewModel.buildChannelTree(channels, clients, expandedChannelIds, unreadStates)
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}
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```
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**频道数据更新策略**：
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- 频道列表是静态数据，SDK 不提供频道增删改事件
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- 连接时全量请求一次（`performInitialSync`），之后按需刷新（超5分钟过期检测）
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- 人员变动事件（Enter/Leave/Move）只刷新客户端列表，不碰频道列表
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- 如果管理员创建/删除了频道，用户下次切换频道时自动检测过期并刷新
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**频道切换状态机**：
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```
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用户点击频道
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│
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▼
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Idle ──→ Requesting ──→ WaitingServerEvent ──→ Idle
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│ │ │
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│ ▼ ▼
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│ Failed 超时 → Failed
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│ │
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└───────────┘
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用户重试/取消
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```
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**事件处理**：
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| 事件 | 处理 |
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|------|------|
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| `handleClientEnter()` | `Repository.refreshClientList()` 全量刷新（高频） |
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| `handleClientLeave()` | `Repository.refreshClientList()` 全量刷新（高频） |
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| `handleClientMoved()` | 区分自己/他人，全量刷新 + 更新 currentChannelId（高频） |
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| `onTextMessage()` | 设置 hasUnreadMessage 标记（仅当 targetId != currentChannelId） |
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### 3.3 ChatViewModel — 文字聊天
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**职责**：管理消息列表、发送状态、送达确认。
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```
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ChatViewModel
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├── messages: StateFlow<List<ChatMessage>> // 当前会话消息
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├── sendState: StateFlow<MessageSendState>
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│ ├── Idle 空闲
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│ ├── Sending 发送中
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│ └── Failed 发送失败
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│
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├── currentTargetMode: Int // 1=私聊, 2=频道, 3=服务器
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├── currentTargetId: Long // 目标 ID
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└── deliveryTimeoutJob // 送达确认超时
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```
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**消息生命周期**：
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```
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用户输入
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│
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▼
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sendMessage()
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│
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├── 1. 创建 PENDING 消息 → Repository.archiveMessage()
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├── 2. TSBridge.sendTextMessage()
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│ ├── 成功 → 等待回显（10秒超时）
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│ └── 失败 → 标记 FAILED
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│
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▼
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收到 OnTextMessage 回显
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│
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├── Repository.confirmMessageDelivery() 匹配 PENDING
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│ ├── 匹配 → 标记 SENT（送达确认）
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│ └── 不匹配 → 正常归档（他人消息）
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│
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▼
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超时未确认 → 标记 FAILED
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```
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**会话管理**：
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- `enterChat()` — 设置 activeChatKey，加载消息，清除未读
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- `leaveChat()` — 清除 activeChatKey，重置发送状态
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- `clearMessages()` — 清空消息列表（断开连接时）
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### 3.4 VoiceViewModel — 语音通信
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**职责**：管理 PTT、静音、语音状态、说话检测。
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```
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VoiceViewModel
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├── voiceState: StateFlow<VoiceState>
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│ ├── Idle 空闲（可 PTT）
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│ ├── Transmitting 发送中（PTT 按下）
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│ └── Blocked 受阻（原因：未连接/未入频道/权限/断开）
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│
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├── isMuted: StateFlow<Boolean> // 默认 true
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├── isTransmitting: StateFlow<Boolean>
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├── speakerEnabled: StateFlow<Boolean>
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├── denoiseEnabled: StateFlow<Boolean>
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├── showVoiceCard: StateFlow<Boolean>
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├── outputDevice: StateFlow<VoiceOutputDevice>
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├── inputVolume / outputVolume: StateFlow<Float>
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├── isSelfSpeaking: StateFlow<Boolean>
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└── speakingClients: StateFlow<Map<Int, Long>>
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```
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**PTT 状态机**：
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```
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Idle ──→ startTransmit() ──→ Transmitting ──→ stopTransmit() ──→ Idle
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│ │
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│ 前置检查失败 │ 异常
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▼ ▼
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Blocked ←──────────────────────────┘
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│
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└── clearBlocked() ──→ Idle
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```
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## 4. 状态生命周期
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### 4.1 连接建立
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```
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用户点击连接
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│
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▼
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ServerViewModel.connect()
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│ connectState = CONNECTING
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▼
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TSBridge.connect() (IO 线程)
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│
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▼
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onConnected 回调
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│
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├── Repository 记录连接
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├── ChannelVM.performInitialSync()
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│ ├── syncState = Syncing
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│ ├── Repository.performInitialSync() (串行请求)
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│ ├── syncState = Synchronized
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│ └── autoExpandChannelsWithClients()
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│
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├── ConnectionService.start() (前台服务保活)
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├── connectState = SUCCESS
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└── connectionState = Connected
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│
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▼
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NavGraph 导航到 CHANNEL_LIST
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```
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### 4.2 正常断开
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```
|
|||
|
|
用户点击断开
|
|||
|
|
│
|
|||
|
|
▼
|
|||
|
|
ServerViewModel.disconnect()
|
|||
|
|
│
|
|||
|
|
├── ConnectionService.stop()
|
|||
|
|
├── reconnectJob?.cancel()
|
|||
|
|
├── connectionState = Disconnecting
|
|||
|
|
├── voiceViewModel.stopVoice()
|
|||
|
|
├── TSBridge.disconnect()
|
|||
|
|
│
|
|||
|
|
├── Repository.clearSession()
|
|||
|
|
│ ├── channels/clients = empty
|
|||
|
|
│ ├── selfClientId = 0
|
|||
|
|
│ ├── currentChannelId = "0"
|
|||
|
|
│ ├── channelClients = empty
|
|||
|
|
│ └── messageArchives.clear()
|
|||
|
|
│
|
|||
|
|
├── channelViewModel.clearChannels()
|
|||
|
|
│ ├── syncState = Unsynced
|
|||
|
|
│ ├── expandedChannelIds = empty
|
|||
|
|
│ ├── unreadStates = empty
|
|||
|
|
│ └── switchState = Idle
|
|||
|
|
│
|
|||
|
|
├── chatViewModel.clearMessages()
|
|||
|
|
│ ├── messages = empty
|
|||
|
|
│ └── sendState = Idle
|
|||
|
|
│
|
|||
|
|
├── connectionState = null
|
|||
|
|
└── connectState = IDLE
|
|||
|
|
│
|
|||
|
|
▼
|
|||
|
|
NavGraph 导航到 SERVER_CONFIG
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 4.3 被踢出
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
onKicked 回调
|
|||
|
|
│
|
|||
|
|
├── ConnectionService.stop()
|
|||
|
|
├── reconnectJob?.cancel()
|
|||
|
|
├── voiceViewModel.stopVoice()
|
|||
|
|
├── Repository.clearSession()
|
|||
|
|
├── channelViewModel.clearChannels()
|
|||
|
|
│
|
|||
|
|
├── kickReason = reason
|
|||
|
|
└── connectionState = Disconnected(wasKicked=true)
|
|||
|
|
│
|
|||
|
|
▼
|
|||
|
|
NavGraph 导航到 KICKED
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 4.4 网络断开（自动重连已禁用）
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
onDisconnected 回调
|
|||
|
|
│
|
|||
|
|
├── 检查 connectionState
|
|||
|
|
│ ├── Disconnecting → 忽略（主动断开）
|
|||
|
|
│ └── 其他 → 继续
|
|||
|
|
│
|
|||
|
|
├── voiceViewModel.onDisconnected()
|
|||
|
|
│ └── voiceState = Blocked("连接已断开")
|
|||
|
|
│
|
|||
|
|
├── ConnectionService.stop()
|
|||
|
|
├── Repository.clearSession()
|
|||
|
|
├── channelViewModel.clearChannels()
|
|||
|
|
│
|
|||
|
|
└── connectionState = Disconnected(wasKicked=false)
|
|||
|
|
│
|
|||
|
|
▼
|
|||
|
|
NavGraph 导航到 SERVER_CONFIG
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 5. 状态流向图
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
┌──────────────────────────────┐
|
|||
|
|
│ Repository │
|
|||
|
|
│ channels (低频) / clients (高频) │
|
|||
|
|
└──────┬───────────────────────┘
|
|||
|
|
│ StateFlow（只读引用）
|
|||
|
|
┌────────────┼────────────────┐
|
|||
|
|
▼ ▼ ▼
|
|||
|
|
┌────────────┐ ┌──────────┐ ┌──────────┐
|
|||
|
|
│ ChannelVM │ │ ChatVM │ │ VoiceVM │
|
|||
|
|
│ 同步状态 │ │ 消息管理 │ │ 语音控制 │
|
|||
|
|
│ 切换状态机 │ │ 送达确认 │ │ PTT │
|
|||
|
|
│ 展开/未读 │ │ │ │ │
|
|||
|
|
└─────┬──────┘ └────┬─────┘ └────┬─────┘
|
|||
|
|
│ StateFlow │ StateFlow │ StateFlow
|
|||
|
|
▼ ▼ ▼
|
|||
|
|
┌─────────────────────────────────────────┐
|
|||
|
|
│ Compose UI Layer │
|
|||
|
|
│ collectAsState() → remember 派生计算 │
|
|||
|
|
└─────────────────────────────────────────┘
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
**数据流规则**：
|
|||
|
|
1. **Repository** 持有底层数据。`channels` 低频更新（连接时请求），`clients` 高频更新（每次人员变动全量刷新）
|
|||
|
|
2. **ViewModel** 读取 Repository 的 StateFlow 引用，仅管理本地 UI 状态（expandedChannelIds、hasUnreadMessage、switchState 等）
|
|||
|
|
3. **UI** 通过 `collectAsState()` 订阅 StateFlow，使用 `remember` 实时派生计算（频道树）。不维护中间 combine 状态
|
|||
|
|
4. **事件** 从 ServerViewModel（Bridge 回调）→ ViewModel 方法 → Repository 更新 → StateFlow 自动通知 UI
|
|||
|
|
|
|||
|
|
## 6. 导航状态控制
|
|||
|
|
|
|||
|
|
NavGraph 监听 `connectionState` 变化，自动处理导航：
|
|||
|
|
|
|||
|
|
```
|
|||
|
|
connectionState 变化
|
|||
|
|
│
|
|||
|
|
├── Disconnected(wasKicked=true) → navigate(KICKED)
|
|||
|
|
├── Disconnected(wasKicked=false) → navigate(SERVER_CONFIG)
|
|||
|
|
├── Connected (当前在 KICKED) → navigate(CHANNEL_LIST)
|
|||
|
|
└── 其他 → 不处理
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
**页面与 ViewModel 生命周期**：
|
|||
|
|
- ViewModel 作用域绑定到 NavBackStackEntry
|
|||
|
|
- 从 CHANNEL_LIST 导航到 CHAT 时，ChannelVM 不销毁（在返回栈中）
|
|||
|
|
- 从 CHAT 返回 CHANNEL_LIST 时，ChannelVM 状态保持
|
|||
|
|
- 如果系统回收 ViewModel（内存不足），`LaunchedEffect` 检测 `syncState != Synchronized` 并重新触发同步
|
|||
|
|
|
|||
|
|
## 7. 已知状态问题与防护
|
|||
|
|
|
|||
|
|
| 问题 | 防护措施 |
|
|||
|
|
|------|---------|
|
|||
|
|
| ViewModel 被系统回收后 syncState 回到 Unsynced | ChannelListScreen 的 `LaunchedEffect` 自动重新同步 |
|
|||
|
|
| 详情按钮快速连点 | ViewModel 层 500ms 防抖 |
|
|||
|
|
| `leaveChat()` 被调用多次（Compose 重组） | `leaveChat()` 本身是幂等操作，无副作用 |
|