feat: homepage里面新增直播判断

src/api/global.ts

@@ -104,6 +104,13 @@ export interface UserData {
   workMode: number
   // 监控状态 0: 未开启 1: 已开启
   monitorState: number
+  /** 老师投屏状态（getHomePage 返回） */
+  screenShareState?: {
+    classId: string
+    ip: string | null
+    port: number | null
+    sharing: boolean
+  }
   isTeacher: boolean
   // 是否为可以接受任务的学员
   isTaskStudent: boolean

src/hooks/useTeacherExplain.ts

@@ -140,6 +140,77 @@ function startTeacherScreenSharePolling(classId: string) {
   }, TEACHER_SCREEN_SHARE_STATE_POLL_INTERVAL)
 }
 
+function resolveTeacherScreenSharePollClassId(msg: Record<string, unknown>): string {
+  if (msg.classId !== undefined && msg.classId !== null && String(msg.classId).trim() !== '') {
+    return String(msg.classId)
+  }
+  if (classInfo.value?.classId !== undefined && classInfo.value?.classId !== null) {
+    return String(classInfo.value.classId)
+  }
+  const userClassId = userStore().userInfo?.classId
+  if (userClassId !== undefined && userClassId !== null && String(userClassId).trim() !== '') {
+    return String(userClassId)
+  }
+  return ''
+}
+
+/** 启动老师投屏直播（原生 + 状态轮询） */
+function applyTeacherScreenShareStart(msg: Record<string, unknown>): boolean {
+  const host = msg.ip !== undefined && msg.ip !== null ? String(msg.ip) : ''
+  const port = Number(msg.port)
+  if (!host || !Number.isFinite(port)) return false
+
+  const u = userStore().userInfo
+  $XXL.startTeacherShareScreen({
+    host,
+    port,
+    name: String(u?.name || u?.nickName || ''),
+    id: String(u?.userId ?? ''),
+  })
+  const pollClassId = resolveTeacherScreenSharePollClassId(msg)
+  if (pollClassId) startTeacherScreenSharePolling(pollClassId)
+  return true
+}
+
+function stopTeacherScreenShareLive() {
+  stopTeacherScreenSharePolling()
+  $XXL.stopTeacherShareScreen()
+}
+
+/**
+ * 同步 getHomePage 返回的 screenShareState
+ * sharing 为 true 时走直播逻辑，否则结束投屏
+ */
+export const syncTeacherScreenShareState = async (state: unknown) => {
+  const stateInfo = state && typeof state === 'object' ? (state as Record<string, unknown>) : {}
+  const screenShare = stateInfo.screenShareState
+  if (!screenShare || typeof screenShare !== 'object') return
+
+  const share = screenShare as Record<string, unknown>
+  if (share.sharing !== true) {
+    stopTeacherScreenShareLive()
+    return
+  }
+
+  let msg = { ...share }
+  const host = msg.ip !== undefined && msg.ip !== null ? String(msg.ip) : ''
+  const port = Number(msg.port)
+  if (!host || !Number.isFinite(port)) {
+    const classId = resolveTeacherScreenSharePollClassId(msg)
+    if (!classId) return
+    try {
+      const res = await teacherScreenShareApi.state(classId)
+      if (!res?.sharing) return
+      msg = { ...msg, ip: res.ip, port: res.port, classId: res.classId ?? classId }
+    } catch (err) {
+      console.warn('[TeacherExplain] 首页投屏状态补全失败:', err)
+      return
+    }
+  }
+
+  applyTeacherScreenShareStart(msg)
+}
+
 /** 老师投屏开始/结束：调原生桥接 */
 function handleTeacherScreenShareMessage(data: TeacherWsMessage) {
   const root = resolveTeacherScreenSharePayload(data)
@@ -148,29 +219,12 @@ function handleTeacherScreenShareMessage(data: TeacherWsMessage) {
   if (root.type === 'teacherScreenShareStart') {
     const msg = parseMsgObject(root.msg)
     if (!msg) return
-    const host = msg.ip !== undefined && msg.ip !== null ? String(msg.ip) : ''
-    const port = Number(msg.port)
-    if (!host || !Number.isFinite(port)) return
-    const u = userStore().userInfo
-    $XXL.startTeacherShareScreen({
-      host,
-      port,
-      name: String(u?.name || u?.nickName || ''),
-      id: String(u?.userId ?? ''),
-    })
-    const pollClassId =
-      msg.classId !== undefined && msg.classId !== null && String(msg.classId).trim() !== ''
-        ? String(msg.classId)
-        : classInfo.value?.classId !== undefined && classInfo.value?.classId !== null
-          ? String(classInfo.value.classId)
-          : ''
-    if (pollClassId) startTeacherScreenSharePolling(pollClassId)
+    applyTeacherScreenShareStart(msg)
     return
   }
 
   if (root.type === 'teacherScreenShareStop') {
-    stopTeacherScreenSharePolling()
-    $XXL.stopTeacherShareScreen()
+    stopTeacherScreenShareLive()
   }
 }
 

src/stores/user.ts

@@ -9,6 +9,7 @@ import type { School } from '@/api/studentManage'
 import { setCache, clearCache, getSN, getManufacturer, isStudyMachine, isWebEvn } from '@/utils'
 import { LogType, useLog, useSocket } from '@/hooks'
 import { syncClassMonitorState } from '@/hooks/useClassMonitor'
+import { syncTeacherScreenShareState } from '@/hooks/useTeacherExplain'
 import { globalStore } from '@/stores'
 import { storeToRefs } from 'pinia'
 import obj from '@/utils/obj'
@@ -107,6 +108,7 @@ export const userStore = defineStore('user', () => {
   const updateUserInfo = async (info: any) => {
     if (!info) return
     const hasMonitorState = Object.prototype.hasOwnProperty.call(info, 'monitorState')
+    const hasScreenShareState = Object.prototype.hasOwnProperty.call(info, 'screenShareState')
     info = { ...userInfo.value, ...info }
 
     if (typeof info.screenLock !== 'undefined') {
@@ -121,6 +123,12 @@ export const userStore = defineStore('user', () => {
       syncClassMonitorState(info)
     }
 
+    if (hasScreenShareState) {
+      syncTeacherScreenShareState(info).catch(err => {
+        console.warn('[User] 同步投屏状态失败:', err)
+      })
+    }
+
     if (typeof info.schoolClass === 'string') {
       info.schoolClass = JSON.parse(info.schoolClass)
       if (info.schoolClass?.length) {