app: switch to PullToRefresh

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/build.gradle.kts

@@ -55,6 +55,7 @@ dependencies {
   implementation(Dependencies.ThirdParty.accompanist)
   implementation(Dependencies.ThirdParty.composeFlowLayout)
   implementation(Dependencies.ThirdParty.Moshi.lib)
+  implementation(Dependencies.ThirdParty.pullToRefresh)
   implementation(Dependencies.ThirdParty.Retrofit.moshi)
   implementation(Dependencies.ThirdParty.SQLDelight.androidDriver)
   testImplementation(Dependencies.Testing.junit)

app/src/main/java/dev/msfjarvis/lobsters/ui/main/LobstersApp.kt

@@ -64,9 +64,10 @@ fun LobstersApp() {
         HottestPosts(
           posts = hottestPosts,
           listState = hottestPostsListState,
+          modifier = Modifier.padding(bottom = innerPadding.calculateBottomPadding()),
           isPostSaved = viewModel::isPostSaved,
           saveAction = viewModel::toggleSave,
-          modifier = Modifier.padding(bottom = innerPadding.calculateBottomPadding()),
+          refreshAction = viewModel::reloadPosts,
         )
       }
       composable(Destination.Saved.route) {

app/src/main/java/dev/msfjarvis/lobsters/ui/posts/HottestPosts.kt

@@ -11,6 +11,7 @@ import androidx.compose.ui.Modifier
 import androidx.paging.LoadState
 import androidx.paging.compose.LazyPagingItems
 import androidx.paging.compose.items
+import com.puculek.pulltorefresh.PullToRefresh
 import dev.msfjarvis.lobsters.data.local.SavedPost
 import dev.msfjarvis.lobsters.model.LobstersPost
 import dev.msfjarvis.lobsters.ui.urllauncher.LocalUrlLauncher
@@ -20,39 +21,51 @@ import dev.msfjarvis.lobsters.util.toDbModel
 fun HottestPosts(
   posts: LazyPagingItems<LobstersPost>,
   listState: LazyListState,
-  isPostSaved: (String) -> Boolean,
   modifier: Modifier = Modifier,
+  isPostSaved: (String) -> Boolean,
   saveAction: (SavedPost) -> Unit,
+  refreshAction: () -> Unit,
 ) {
   val urlLauncher = LocalUrlLauncher.current
+  var isRefreshing by mutableStateOf(false)
 
-  if (posts.loadState.refresh == LoadState.Loading) {
-    LazyColumn {
-      items(15) {
-        LoadingLobstersItem()
+  PullToRefresh(
+    isRefreshing = isRefreshing,
+    onRefresh = {
+      if (posts.loadState.refresh != LoadState.Loading) {
+        isRefreshing = isRefreshing.not()
+        refreshAction()
       }
-    }
-  } else {
-    LazyColumn(
-      state = listState,
-      modifier = Modifier.then(modifier),
-    ) {
-      items(posts) { item ->
-        if (item != null) {
-          @Suppress("NAME_SHADOWING")
-          val item = item.toDbModel()
-          var isSaved by remember(item.shortId) { mutableStateOf(isPostSaved(item.shortId)) }
+    },
+  ) {
+    if (posts.loadState.refresh == LoadState.Loading) {
+      LazyColumn {
+        items(15) {
+          LoadingLobstersItem()
+        }
+      }
+    } else {
+      LazyColumn(
+        state = listState,
+        modifier = Modifier.then(modifier),
+      ) {
+        items(posts) { item ->
+          if (item != null) {
+            @Suppress("NAME_SHADOWING")
+            val item = item.toDbModel()
+            var isSaved by remember(item.shortId) { mutableStateOf(isPostSaved(item.shortId)) }
 
-          LobstersItem(
-            post = item,
-            isSaved = isSaved,
-            onClick = { urlLauncher.launch(item.url.ifEmpty { item.commentsUrl }) },
-            onLongClick = { urlLauncher.launch(item.commentsUrl) },
-            onSaveButtonClick = {
-              isSaved = isSaved.not()
-              saveAction.invoke(item)
-            },
-          )
+            LobstersItem(
+              post = item,
+              isSaved = isSaved,
+              onClick = { urlLauncher.launch(item.url.ifEmpty { item.commentsUrl }) },
+              onLongClick = { urlLauncher.launch(item.commentsUrl) },
+              onSaveButtonClick = {
+                isSaved = isSaved.not()
+                saveAction.invoke(item)
+              },
+            )
+          }
         }
       }
     }

buildSrc/src/main/java/Dependencies.kt

@@ -67,6 +67,7 @@ object Dependencies {
 
     const val accompanist = "dev.chrisbanes.accompanist:accompanist-coil:0.6.2"
     const val composeFlowLayout = "com.star-zero:compose-flowlayout:0.0.1"
+    const val pullToRefresh = "com.puculek.pulltorefresh:pull-to-refresh-compose:1.0.0"
 
     object Moshi {