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@ -47,6 +47,10 @@ import kotlinx.serialization.json.JsonObject
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import kotlinx.serialization.json.decodeFromJsonElement
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import kotlinx.serialization.json.encodeToJsonElement
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/**
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* 单例管理类，负责整个聊天会话的生命周期、网络连接、消息收发、状态维护和持久化。
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* 所有公开方法均通过 ViewModel 代理调用，内部使用协程处理异步操作。
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*/
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object ChatSessionManager {
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private val json = Json {
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@ -60,29 +64,34 @@ object ChatSessionManager {
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private val socketClient = OnlineMsgSocketClient()
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private var initialized = false
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// 状态流，供 UI 层订阅
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private val _uiState = MutableStateFlow(ChatUiState())
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val uiState = _uiState.asStateFlow()
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// 事件流（如 Snackbar 消息）
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private val _events = MutableSharedFlow<UiEvent>()
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val events = _events.asSharedFlow()
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// 用于线程安全地访问本地身份
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private val identityMutex = Mutex()
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private var identity: RsaCryptoManager.Identity? = null
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private var manualClose = false
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private var fallbackTried = false
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private var connectedUrl = ""
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private var serverPublicKey = ""
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private var helloTimeoutJob: Job? = null
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private var authTimeoutJob: Job? = null
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private var reconnectJob: Job? = null
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private var reconnectAttempt: Int = 0
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private val systemMessageExpiryJobs: MutableMap<String, Job> = mutableMapOf()
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// 连接相关内部状态
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private var manualClose = false // 是否为手动断开
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private var fallbackTried = false // 是否已尝试切换 ws/wss
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private var connectedUrl = "" // 当前连接的服务器地址
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private var serverPublicKey = "" // 服务端公钥（握手后获得）
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private var helloTimeoutJob: Job? = null // 握手超时任务
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private var authTimeoutJob: Job? = null // 认证超时任务
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private var reconnectJob: Job? = null // 自动重连任务
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private var reconnectAttempt: Int = 0 // 当前重连尝试次数
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private val systemMessageExpiryJobs: MutableMap<String, Job> = mutableMapOf() // 系统消息自动过期任务
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private var autoReconnectTriggered = false
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@Volatile
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private var keepAliveRequested = false
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private var keepAliveRequested = false // 是否应保活（前台服务标志）
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private var notificationIdSeed = 2000
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// WebSocket 事件监听器
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private val socketListener = object : OnlineMsgSocketClient.Listener {
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override fun onOpen() {
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scope.launch {
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@ -151,6 +160,10 @@ object ChatSessionManager {
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}
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}
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/**
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* 初始化管理器，必须在应用启动时调用一次。
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* @param application Application 实例
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*/
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@Synchronized
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fun initialize(application: Application) {
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if (initialized) return
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@ -169,9 +182,12 @@ object ChatSessionManager {
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serverUrls = pref.serverUrls,
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serverUrl = pref.currentServerUrl,
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directMode = pref.directMode,
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showSystemMessages = pref.showSystemMessages
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showSystemMessages = pref.showSystemMessages,
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themeId = pref.themeId, // 假设 preferences 中有 themeId
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useDynamicColor = pref.useDynamicColor
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)
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}
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// 如果上次会话启用了自动重连，则自动恢复连接
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if (pref.shouldAutoReconnect && !autoReconnectTriggered) {
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autoReconnectTriggered = true
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ChatForegroundService.start(application)
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@ -180,6 +196,32 @@ object ChatSessionManager {
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}
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}
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/**
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* 更新主题
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* @param themeId 主题名
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*/
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fun updateTheme(themeId: String) {
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_uiState.update { it.copy(themeId = themeId) }
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scope.launch {
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preferencesRepository.setThemeId(themeId)
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}
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}
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/**
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* 更改使用动态颜色
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* @param enabled 主题名
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*/
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fun updateUseDynamicColor(enabled: Boolean) {
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_uiState.update { it.copy(useDynamicColor = enabled) }
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scope.launch {
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preferencesRepository.setUseDynamicColor(enabled)
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}
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}
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/**
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* 更新显示名称并持久化。
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* @param value 新名称（自动截断至 64 字符）
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*/
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fun updateDisplayName(value: String) {
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val displayName = value.take(64)
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_uiState.update { it.copy(displayName = displayName) }
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@ -188,18 +230,34 @@ object ChatSessionManager {
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}
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}
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/**
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* 更新当前输入的服务器地址（不持久化）。
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* @param value 新地址
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*/
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fun updateServerUrl(value: String) {
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_uiState.update { it.copy(serverUrl = value) }
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}
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/**
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* 更新私聊目标公钥。
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* @param value 公钥字符串
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*/
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fun updateTargetKey(value: String) {
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_uiState.update { it.copy(targetKey = value) }
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}
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/**
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* 更新消息草稿。
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* @param value 草稿内容
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*/
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fun updateDraft(value: String) {
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_uiState.update { it.copy(draft = value) }
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}
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/**
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* 切换广播/私聊模式并持久化。
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* @param enabled true 为私聊模式
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*/
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fun toggleDirectMode(enabled: Boolean) {
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_uiState.update { it.copy(directMode = enabled) }
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scope.launch {
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@ -207,6 +265,10 @@ object ChatSessionManager {
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}
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}
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/**
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* 切换是否显示系统消息并持久化。
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* @param show true 显示
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*/
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fun toggleShowSystemMessages(show: Boolean) {
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_uiState.update { it.copy(showSystemMessages = show) }
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scope.launch {
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@ -214,11 +276,17 @@ object ChatSessionManager {
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}
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}
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/**
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* 清空所有消息，并取消系统消息的过期任务。
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*/
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fun clearMessages() {
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cancelSystemMessageExpiryJobs()
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_uiState.update { it.copy(messages = emptyList()) }
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}
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/**
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* 保存当前服务器地址到历史列表并持久化。
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*/
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fun saveCurrentServerUrl() {
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val normalized = ServerUrlFormatter.normalize(_uiState.value.serverUrl)
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if (normalized.isBlank()) {
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@ -243,6 +311,10 @@ object ChatSessionManager {
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}
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}
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/**
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* 从历史列表中移除当前服务器地址。
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* 如果列表清空则恢复默认地址。
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*/
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fun removeCurrentServerUrl() {
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val normalized = ServerUrlFormatter.normalize(_uiState.value.serverUrl)
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if (normalized.isBlank()) return
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@ -268,6 +340,9 @@ object ChatSessionManager {
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}
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}
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/**
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* 加载或生成本地身份密钥对，并将公钥显示到 UI。
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*/
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fun revealMyPublicKey() {
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scope.launch {
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_uiState.update { it.copy(loadingPublicKey = true) }
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@ -287,10 +362,17 @@ object ChatSessionManager {
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}
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}
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/**
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* 主动连接服务器（由用户点击连接触发）。
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*/
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fun connect() {
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connectInternal(isAutoRestore = false)
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}
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/**
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* 内部连接逻辑，区分自动恢复和手动连接。
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* @param isAutoRestore 是否为应用启动时的自动恢复连接
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*/
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private fun connectInternal(isAutoRestore: Boolean) {
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if (!initialized) return
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val state = _uiState.value
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@ -339,6 +421,10 @@ object ChatSessionManager {
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}
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}
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/**
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* 主动断开连接。
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* @param stopService 是否同时停止前台服务（默认 true）
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*/
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fun disconnect(stopService: Boolean = true) {
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manualClose = true
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cancelReconnect()
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@ -362,6 +448,10 @@ object ChatSessionManager {
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addSystemMessage("已断开连接")
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}
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/**
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* 发送消息（广播或私聊）。
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* 执行签名、加密并发送。
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*/
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fun sendMessage() {
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val current = _uiState.value
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if (!current.canSend) return
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@ -419,12 +509,19 @@ object ChatSessionManager {
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}
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}
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/**
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* 消息复制成功后的回调，显示“已复制”提示。
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*/
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fun onMessageCopied() {
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scope.launch {
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_events.emit(UiEvent.ShowSnackbar("已复制"))
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}
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}
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/**
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* 确保本地身份已加载或创建。
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* @return 本地身份对象
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*/
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private suspend fun ensureIdentity(): RsaCryptoManager.Identity {
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return identityMutex.withLock {
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identity ?: withContext(Dispatchers.Default) {
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@ -435,6 +532,10 @@ object ChatSessionManager {
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}
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}
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/**
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* 处理收到的原始文本消息（可能是握手包或加密消息）。
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* @param rawText 原始文本
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*/
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private suspend fun handleIncomingMessage(rawText: String) {
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if (_uiState.value.status == ConnectionStatus.HANDSHAKING) {
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_uiState.update { it.copy(statusHint = "已收到握手数据，正在解析...") }
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@ -445,7 +546,7 @@ object ChatSessionManager {
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json.decodeFromString<JsonElement>(normalizedText) as? JsonObject
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}.getOrNull()
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// 兼容某些代理/中间层直接转发 hello data 对象（没有 envelope 外层）
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// 尝试直接解析为 HelloDataDto（某些服务器可能直接发送，不带外层）
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val directHello = rootObject?.let { obj ->
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val hasPublicKey = obj["publicKey"] != null
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val hasChallenge = obj["authChallenge"] != null
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@ -461,6 +562,7 @@ object ChatSessionManager {
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return
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}
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// 尝试解析为带外层的 EnvelopeDto
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val plain = runCatching { json.decodeFromString<EnvelopeDto>(normalizedText) }.getOrNull()
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if (plain?.type == "publickey") {
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cancelHelloTimeout()
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@ -480,6 +582,7 @@ object ChatSessionManager {
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return
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}
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// 握手阶段收到非预期消息则报错
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if (_uiState.value.status == ConnectionStatus.HANDSHAKING && plain != null) {
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_uiState.update { it.copy(statusHint = "握手失败：收到非预期消息") }
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addSystemMessage("握手阶段收到非预期消息类型：${plain.type}")
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@ -492,6 +595,7 @@ object ChatSessionManager {
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addSystemMessage("握手包解析失败：$preview")
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}
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// 尝试解密（若已握手完成，收到的应是加密消息）
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val id = ensureIdentity()
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val decrypted = runCatching {
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withContext(Dispatchers.Default) {
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@ -509,6 +613,10 @@ object ChatSessionManager {
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handleSecureMessage(secure)
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}
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/**
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* 处理服务端发来的握手 Hello 数据。
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* @param hello 服务端公钥和挑战
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*/
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private suspend fun handleServerHello(hello: HelloDataDto) {
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cancelHelloTimeout()
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|
serverPublicKey = hello.publicKey
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@ -552,6 +660,10 @@ object ChatSessionManager {
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}
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}
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|
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|
/**
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|
|
|
|
* 发送认证消息（包含签名后的身份信息）。
|
|
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|
* @param challenge 服务端提供的挑战值
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|
|
|
|
*/
|
|
|
|
|
private suspend fun sendAuth(challenge: String) {
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|
|
val id = ensureIdentity()
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|
|
val displayName = _uiState.value.displayName.trim().ifBlank { createGuestName() }
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@ -595,6 +707,10 @@ object ChatSessionManager {
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|
check(socketClient.send(cipher)) { "连接不可用" }
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}
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|
/**
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|
|
* 处理安全通道建立后的业务消息（广播、私聊、认证结果等）。
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|
* @param message 解密后的 EnvelopeDto
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|
*/
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|
private fun handleSecureMessage(message: EnvelopeDto) {
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|
when (message.type) {
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"auth_ok" -> {
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@ -634,6 +750,11 @@ object ChatSessionManager {
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}
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|
}
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|
/**
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|
|
* 处理 WebSocket 连接关闭事件。
|
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|
|
* @param code 关闭状态码
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|
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|
* @param reason 关闭原因
|
|
|
|
|
*/
|
|
|
|
|
private fun handleSocketClosed(code: Int, reason: String) {
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|
|
|
cancelHelloTimeout()
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|
|
cancelAuthTimeout()
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|
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|
@ -652,6 +773,7 @@ object ChatSessionManager {
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|
|
val allowFallback = !fallbackTried && currentStatus != ConnectionStatus.READY
|
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|
|
// 尝试切换 ws/wss 协议重试（仅限非就绪状态）
|
|
|
|
|
if (allowFallback) {
|
|
|
|
|
val fallbackUrl = ServerUrlFormatter.toggleWsProtocol(connectedUrl)
|
|
|
|
|
if (fallbackUrl.isNotBlank()) {
|
|
|
|
|
@ -680,6 +802,10 @@ object ChatSessionManager {
|
|
|
|
|
scheduleReconnect("连接已中断")
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 添加一条系统消息（自动按 TTL 过期）。
|
|
|
|
|
* @param content 消息内容
|
|
|
|
|
*/
|
|
|
|
|
private fun addSystemMessage(content: String) {
|
|
|
|
|
val message = UiMessage(
|
|
|
|
|
role = MessageRole.SYSTEM,
|
|
|
|
|
@ -692,6 +818,13 @@ object ChatSessionManager {
|
|
|
|
|
scheduleSystemMessageExpiry(message.id)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 添加一条接收到的用户消息。
|
|
|
|
|
* @param sender 发送者名称
|
|
|
|
|
* @param subtitle 附加说明（如私聊来源）
|
|
|
|
|
* @param content 消息内容
|
|
|
|
|
* @param channel 消息通道（广播/私聊）
|
|
|
|
|
*/
|
|
|
|
|
private fun addIncomingMessage(
|
|
|
|
|
sender: String,
|
|
|
|
|
subtitle: String,
|
|
|
|
|
@ -713,6 +846,12 @@ object ChatSessionManager {
|
|
|
|
|
)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 添加一条发出的消息。
|
|
|
|
|
* @param content 消息内容
|
|
|
|
|
* @param subtitle 附加说明（如私聊目标）
|
|
|
|
|
* @param channel 消息通道
|
|
|
|
|
*/
|
|
|
|
|
private fun addOutgoingMessage(
|
|
|
|
|
content: String,
|
|
|
|
|
subtitle: String,
|
|
|
|
|
@ -729,6 +868,10 @@ object ChatSessionManager {
|
|
|
|
|
)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 将消息追加到列表尾部，并清理超出数量限制的消息。
|
|
|
|
|
* @param message 要追加的消息
|
|
|
|
|
*/
|
|
|
|
|
private fun appendMessage(message: UiMessage) {
|
|
|
|
|
_uiState.update { current ->
|
|
|
|
|
val next = (current.messages + message).takeLast(MAX_MESSAGES)
|
|
|
|
|
@ -741,11 +884,18 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 取消认证超时任务。
|
|
|
|
|
*/
|
|
|
|
|
private fun cancelAuthTimeout() {
|
|
|
|
|
authTimeoutJob?.cancel()
|
|
|
|
|
authTimeoutJob = null
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 安排自动重连（指数退避）。
|
|
|
|
|
* @param reason 触发重连的原因
|
|
|
|
|
*/
|
|
|
|
|
private fun scheduleReconnect(reason: String) {
|
|
|
|
|
if (manualClose) return
|
|
|
|
|
if (reconnectJob?.isActive == true) return
|
|
|
|
|
@ -793,11 +943,18 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 取消自动重连任务。
|
|
|
|
|
*/
|
|
|
|
|
private fun cancelReconnect() {
|
|
|
|
|
reconnectJob?.cancel()
|
|
|
|
|
reconnectJob = null
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 为系统消息安排过期自动删除。
|
|
|
|
|
* @param messageId 消息唯一 ID
|
|
|
|
|
*/
|
|
|
|
|
private fun scheduleSystemMessageExpiry(messageId: String) {
|
|
|
|
|
systemMessageExpiryJobs.remove(messageId)?.cancel()
|
|
|
|
|
systemMessageExpiryJobs[messageId] = scope.launch {
|
|
|
|
|
@ -810,11 +967,17 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 取消所有系统消息的过期任务。
|
|
|
|
|
*/
|
|
|
|
|
private fun cancelSystemMessageExpiryJobs() {
|
|
|
|
|
systemMessageExpiryJobs.values.forEach { it.cancel() }
|
|
|
|
|
systemMessageExpiryJobs.clear()
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 启动握手超时计时器。
|
|
|
|
|
*/
|
|
|
|
|
private fun startHelloTimeout() {
|
|
|
|
|
cancelHelloTimeout()
|
|
|
|
|
helloTimeoutJob = scope.launch {
|
|
|
|
|
@ -833,21 +996,38 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 取消握手超时任务。
|
|
|
|
|
*/
|
|
|
|
|
private fun cancelHelloTimeout() {
|
|
|
|
|
helloTimeoutJob?.cancel()
|
|
|
|
|
helloTimeoutJob = null
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 缩写显示公钥（取前后各8字符）。
|
|
|
|
|
* @param key 完整公钥
|
|
|
|
|
* @return 缩写字符串
|
|
|
|
|
*/
|
|
|
|
|
private fun summarizeKey(key: String): String {
|
|
|
|
|
if (key.length <= 16) return key
|
|
|
|
|
return "${key.take(8)}...${key.takeLast(8)}"
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 生成访客名称（如 guest-123456）。
|
|
|
|
|
* @return 随机名称
|
|
|
|
|
*/
|
|
|
|
|
private fun createGuestName(): String {
|
|
|
|
|
val rand = (100000..999999).random()
|
|
|
|
|
return "guest-$rand"
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 从可能包含前缀的原始文本中提取 JSON 对象部分。
|
|
|
|
|
* @param rawText 原始文本
|
|
|
|
|
* @return 最外层的 JSON 字符串
|
|
|
|
|
*/
|
|
|
|
|
private fun extractJsonCandidate(rawText: String): String {
|
|
|
|
|
val trimmed = rawText.trim()
|
|
|
|
|
if (trimmed.startsWith("{") && trimmed.endsWith("}")) {
|
|
|
|
|
@ -863,6 +1043,9 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 关闭所有资源（用于应用退出时）。
|
|
|
|
|
*/
|
|
|
|
|
fun shutdownAll() {
|
|
|
|
|
cancelSystemMessageExpiryJobs()
|
|
|
|
|
cancelReconnect()
|
|
|
|
|
@ -871,6 +1054,9 @@ object ChatSessionManager {
|
|
|
|
|
socketClient.shutdown()
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 前台服务停止时的回调。
|
|
|
|
|
*/
|
|
|
|
|
fun onForegroundServiceStopped() {
|
|
|
|
|
keepAliveRequested = false
|
|
|
|
|
if (_uiState.value.status != ConnectionStatus.IDLE) {
|
|
|
|
|
@ -882,8 +1068,15 @@ object ChatSessionManager {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 判断前台服务是否应该运行。
|
|
|
|
|
* @return true 表示应保持服务运行
|
|
|
|
|
*/
|
|
|
|
|
fun shouldForegroundServiceRun(): Boolean = keepAliveRequested
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 创建消息通知渠道（Android O+）。
|
|
|
|
|
*/
|
|
|
|
|
private fun ensureMessageNotificationChannel() {
|
|
|
|
|
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
|
|
|
|
|
val manager = app.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
|
|
|
|
|
@ -897,6 +1090,11 @@ object ChatSessionManager {
|
|
|
|
|
manager.createNotificationChannel(channel)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 显示新消息到达的通知。
|
|
|
|
|
* @param title 通知标题
|
|
|
|
|
* @param body 通知正文
|
|
|
|
|
*/
|
|
|
|
|
private fun showIncomingNotification(title: String, body: String) {
|
|
|
|
|
if (!initialized) return
|
|
|
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU &&
|
|
|
|
|
@ -928,16 +1126,21 @@ object ChatSessionManager {
|
|
|
|
|
NotificationManagerCompat.from(app).notify(nextMessageNotificationId(), notification)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 生成下一个通知 ID（线程安全递增）。
|
|
|
|
|
* @return 新的通知 ID
|
|
|
|
|
*/
|
|
|
|
|
@Synchronized
|
|
|
|
|
private fun nextMessageNotificationId(): Int {
|
|
|
|
|
notificationIdSeed += 1
|
|
|
|
|
return notificationIdSeed
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 常量定义
|
|
|
|
|
private const val HELLO_TIMEOUT_MS = 12_000L
|
|
|
|
|
private const val AUTH_TIMEOUT_MS = 20_000L
|
|
|
|
|
private const val MAX_MESSAGES = 500
|
|
|
|
|
private const val MAX_RECONNECT_DELAY_SECONDS = 30
|
|
|
|
|
private const val SYSTEM_MESSAGE_TTL_MS = 1_000L
|
|
|
|
|
private const val MESSAGE_CHANNEL_ID = "onlinemsg_messages"
|
|
|
|
|
}
|
|
|
|
|
}
|
