feat: 动态页面状态屏

app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedPage.kt

@@ -33,6 +33,7 @@ import androidx.compose.material.pullrefresh.pullRefresh
 import androidx.compose.material.pullrefresh.rememberPullRefreshState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
@@ -62,11 +63,13 @@ import com.huanchengfly.tieba.post.ui.page.destinations.ThreadPageDestination
 import com.huanchengfly.tieba.post.ui.widgets.compose.BlockTip
 import com.huanchengfly.tieba.post.ui.widgets.compose.BlockableContent
 import com.huanchengfly.tieba.post.ui.widgets.compose.Container
+import com.huanchengfly.tieba.post.ui.widgets.compose.ErrorScreen
 import com.huanchengfly.tieba.post.ui.widgets.compose.FeedCard
 import com.huanchengfly.tieba.post.ui.widgets.compose.LazyLoad
 import com.huanchengfly.tieba.post.ui.widgets.compose.LoadMoreLayout
 import com.huanchengfly.tieba.post.ui.widgets.compose.MyLazyColumn
 import com.huanchengfly.tieba.post.ui.widgets.compose.VerticalDivider
+import com.huanchengfly.tieba.post.ui.widgets.compose.states.StateScreen
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.coroutines.delay
@@ -98,6 +101,10 @@ fun PersonalizedPage(
         prop1 = PersonalizedUiState::data,
         initial = persistentListOf()
     )
+    val error by viewModel.uiState.collectPartialAsState(
+        prop1 = PersonalizedUiState::error,
+        initial = null
+    )
     val refreshPosition by viewModel.uiState.collectPartialAsState(
         prop1 = PersonalizedUiState::refreshPosition,
         initial = 0
@@ -112,6 +119,16 @@ fun PersonalizedPage(
     )
     val lazyListState = rememberLazyListState()
     viewModel.bindScrollToTopEvent(lazyListState = lazyListState)
+    val isEmpty by remember {
+        derivedStateOf {
+            data.isEmpty()
+        }
+    }
+    val isError by remember {
+        derivedStateOf {
+            error != null
+        }
+    }
     var refreshCount by remember {
         mutableIntStateOf(0)
     }
@@ -147,6 +164,19 @@ fun PersonalizedPage(
 //            }
 //        }
 //    }
+    StateScreen(
+        isEmpty = isEmpty,
+        isError = isError,
+        isLoading = isRefreshing,
+        onReload = { viewModel.send(PersonalizedUiIntent.Refresh) },
+        errorScreen = {
+            error?.let {
+                ErrorScreen(
+                    error = it.get()
+                )
+            }
+        }
+    ) {
         Box(modifier = Modifier.pullRefresh(pullRefreshState)) {
             LoadMoreLayout(
                 isLoading = isLoadingMore,
@@ -221,6 +251,7 @@ fun PersonalizedPage(
             }
         }
     }
+}
 
 @Composable
 private fun BoxScope.RefreshTip(refreshCount: Int) {

app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedViewModel.kt

@@ -145,7 +145,7 @@ class PersonalizedViewModel @Inject constructor() :
 }
 
 sealed interface PersonalizedUiIntent : UiIntent {
-    object Refresh : PersonalizedUiIntent
+    data object Refresh : PersonalizedUiIntent
 
     data class LoadMore(val page: Int) : PersonalizedUiIntent
 
@@ -282,10 +282,14 @@ sealed interface PersonalizedPartialChange : PartialChange<PersonalizedUiState>
                     data = (data + oldState.data).toImmutableList(),
                     refreshPosition = if (oldState.data.isEmpty()) 0 else data.size
                 )
-                is Failure -> oldState.copy(isRefreshing = false)
+
+                is Failure -> oldState.copy(
+                    isRefreshing = false,
+                    error = error.wrapImmutable()
+                )
             }
 
-        object Start: Refresh()
+        data object Start : Refresh()
 
         data class Success(
             val data: List<ThreadItemData>,
@@ -305,10 +309,14 @@ sealed interface PersonalizedPartialChange : PartialChange<PersonalizedUiState>
                     currentPage = currentPage,
                     data = (oldState.data + data).toImmutableList(),
                 )
-                is Failure -> oldState.copy(isLoadingMore = false)
+
+                is Failure -> oldState.copy(
+                    isLoadingMore = false,
+                    error = error.wrapImmutable()
+                )
             }
 
-        object Start: LoadMore()
+        data object Start : LoadMore()
 
         data class Success(
             val currentPage: Int,
@@ -325,6 +333,7 @@ sealed interface PersonalizedPartialChange : PartialChange<PersonalizedUiState>
 data class PersonalizedUiState(
     val isRefreshing: Boolean = true,
     val isLoadingMore: Boolean = false,
+    val error: ImmutableHolder<Throwable>? = null,
     val currentPage: Int = 1,
     val data: ImmutableList<ThreadItemData> = persistentListOf(),
     val hiddenThreadIds: ImmutableList<Long> = persistentListOf(),