新增动态为空时显示热门动态功能

app/src/main/java/com/aiosman/riderpro/ui/index/tabs/moment/MomentViewModel.kt

@@ -28,8 +28,10 @@ object MomentViewModel : ViewModel() {
     private val _momentsFlow = MutableStateFlow<PagingData<MomentEntity>>(PagingData.empty())
     val momentsFlow = _momentsFlow.asStateFlow()
     val accountService: AccountService = AccountServiceImpl()
+    var existsException = mutableStateOf(false)
     init {
         viewModelScope.launch {
+            // 获取当前用户信息
             val profile = accountService.getMyAccountProfile()
             Pager(
                 config = PagingConfig(pageSize = 5, enablePlaceholders = false),
@@ -47,12 +49,19 @@ object MomentViewModel : ViewModel() {
     fun refreshPager() {
         viewModelScope.launch {
             val profile = accountService.getMyAccountProfile()
+            // 检查是否有动态
+            val existMoments = momentService.getMoments(timelineId = profile.id, pageNumber = 1)
+            if (existMoments.list.isEmpty()) {
+                existsException.value = true
+            }
             Pager(
                 config = PagingConfig(pageSize = 5, enablePlaceholders = false),
                 pagingSourceFactory = {
                     MomentPagingSource(
                         MomentRemoteDataSource(momentService),
-                        timelineId = profile.id
+                        // 如果没有动态，则显示热门动态
+                        timelineId = if (existMoments.list.isEmpty()) null else profile.id,
+                        trend = if (existMoments.list.isEmpty()) true else null
                     )
                 }
             ).flow.cachedIn(viewModelScope).collectLatest {