common: refactor post interactions

android/src/main/kotlin/dev/msfjarvis/claw/android/ui/HottestPosts.kt

@@ -5,29 +5,25 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.paging.LoadState
 import androidx.paging.compose.LazyPagingItems
 import com.google.accompanist.swiperefresh.SwipeRefresh
 import com.google.accompanist.swiperefresh.rememberSwipeRefreshState
+import dev.msfjarvis.claw.common.posts.PostActions
 import dev.msfjarvis.claw.database.local.SavedPost
 import dev.msfjarvis.claw.model.LobstersPost
-import kotlinx.coroutines.launch
 
 @Composable
 fun HottestPosts(
   items: LazyPagingItems<LobstersPost>,
   listState: LazyListState,
   isPostSaved: suspend (SavedPost) -> Boolean,
-  toggleSave: suspend (SavedPost) -> Unit,
   reloadPosts: () -> Unit,
-  launchUrl: (String) -> Unit,
-  viewComments: (String) -> Unit,
+  postActions: PostActions,
   modifier: Modifier,
 ) {
-  val coroutineScope = rememberCoroutineScope()
   val isRefreshing = items.loadState.refresh == LoadState.Loading
   SwipeRefresh(
     state = rememberSwipeRefreshState(isRefreshing),
@@ -38,11 +34,9 @@ fun HottestPosts(
     } else {
       NetworkPosts(
         items = items,
-        launchUrl = launchUrl,
         listState = listState,
         isSaved = isPostSaved,
-        viewComments = viewComments,
-        toggleSave = { coroutineScope.launch { toggleSave(it) } },
+        postActions = postActions,
         modifier = Modifier.padding(top = 16.dp).then(modifier),
       )
     }

android/src/main/kotlin/dev/msfjarvis/claw/android/ui/LobstersApp.kt

@@ -31,8 +31,10 @@ import com.google.accompanist.systemuicontroller.rememberSystemUiController
 import com.mikepenz.markdown.Markdown
 import dev.msfjarvis.claw.android.viewmodel.ClawViewModel
 import dev.msfjarvis.claw.common.comments.CommentsPage
+import dev.msfjarvis.claw.common.posts.PostActions
 import dev.msfjarvis.claw.common.theme.LobstersTheme
 import dev.msfjarvis.claw.common.urllauncher.UrlLauncher
+import dev.msfjarvis.claw.database.local.SavedPost
 import io.github.furstenheim.CopyDown
 
 private const val ScrollDelta = 50
@@ -65,6 +67,21 @@ fun LobstersApp(
       }
     }
   }
+  val postActions = remember {
+    object : PostActions {
+      override fun viewPost(postUrl: String, commentsUrl: String) {
+        urlLauncher.launch(postUrl.ifEmpty { commentsUrl })
+      }
+
+      override fun viewComments(postId: String) {
+        navController.navigate("comments/$postId")
+      }
+
+      override fun toggleSave(post: SavedPost) {
+        viewModel.toggleSave(post)
+      }
+    }
+  }
   LobstersTheme(darkTheme = isSystemInDarkTheme()) {
     ProvideWindowInsets {
       val useDarkIcons = MaterialTheme.colors.isLight
@@ -93,10 +110,8 @@ fun LobstersApp(
               items,
               listState,
               viewModel::isPostSaved,
-              viewModel::toggleSave,
               viewModel::reloadPosts,
-              urlLauncher::launch,
-              { navController.navigate("comments/$it") },
+              postActions,
               Modifier.nestedScroll(nestedScrollConnection),
             )
           }

android/src/main/kotlin/dev/msfjarvis/claw/android/ui/NetworkPosts.kt

@@ -14,6 +14,7 @@ import androidx.compose.ui.unit.dp
 import androidx.paging.compose.LazyPagingItems
 import androidx.paging.compose.items
 import dev.msfjarvis.claw.common.posts.LobstersCard
+import dev.msfjarvis.claw.common.posts.PostActions
 import dev.msfjarvis.claw.common.posts.toDbModel
 import dev.msfjarvis.claw.database.local.SavedPost
 import dev.msfjarvis.claw.model.LobstersPost
@@ -23,10 +24,8 @@ import kotlinx.coroutines.launch
 fun NetworkPosts(
   items: LazyPagingItems<LobstersPost>,
   listState: LazyListState,
-  launchUrl: (String) -> Unit,
   isSaved: suspend (SavedPost) -> Boolean,
-  toggleSave: (SavedPost) -> Unit,
-  viewComments: (String) -> Unit,
+  postActions: PostActions,
   modifier: Modifier = Modifier,
 ) {
   val coroutineScope = rememberCoroutineScope()
@@ -42,9 +41,7 @@ fun NetworkPosts(
         LobstersCard(
           post = dbModel,
           isSaved = saved,
-          viewPost = { launchUrl(item.url.ifEmpty { item.commentsUrl }) },
-          viewComments = { viewComments(item.shortId) },
-          toggleSave = { toggleSave(dbModel) },
+          postActions = postActions,
           modifier = Modifier.padding(bottom = 16.dp, start = 16.dp, end = 16.dp),
         )
       }

android/src/main/kotlin/dev/msfjarvis/claw/android/viewmodel/ClawViewModel.kt

@@ -1,6 +1,7 @@
 package dev.msfjarvis.claw.android.viewmodel
 
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import androidx.paging.Pager
 import androidx.paging.PagingConfig
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -15,6 +16,7 @@ import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.last
 import kotlinx.coroutines.flow.mapLatest
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 @OptIn(ExperimentalCoroutinesApi::class)
@@ -39,13 +41,15 @@ constructor(
     return savedPosts.mapLatest { posts -> post in posts }.last()
   }
 
-  suspend fun toggleSave(post: SavedPost) {
-    val saved = isPostSaved(post)
-    println("saved=$saved")
-    if (saved) {
-      repository.removePost(post)
-    } else {
-      repository.savePost(post)
+  fun toggleSave(post: SavedPost) {
+    viewModelScope.launch {
+      val saved = isPostSaved(post)
+      println("saved=$saved")
+      if (saved) {
+        repository.removePost(post)
+      } else {
+        repository.savePost(post)
+      }
     }
   }