AboutScreen: Added loading indicator to "Check For Updates".

app/src/main/java/ua/acclorite/book_story/presentation/screens/about/AboutScreen.kt

@@ -144,8 +144,10 @@ private fun AboutScreen(
                         )
                         append("\n")
                         append(stringResource(id = R.string.app_version_option_desc_2))
-                    }
+                    },
+                    showLoading = state.value.updateLoading
                 ) {
+                    if (!state.value.alreadyCheckedForUpdates) {
                         onEvent(
                             AboutEvent.OnCheckForUpdates(
                                 context = context,
@@ -165,6 +167,13 @@ private fun AboutScreen(
                                 }
                             )
                         )
+                    } else {
+                        Toast.makeText(
+                            context,
+                            context.getString(R.string.no_updates),
+                            Toast.LENGTH_LONG
+                        ).show()
+                    }
                 }
             }
 

app/src/main/java/ua/acclorite/book_story/presentation/screens/about/components/AboutItem.kt

@@ -1,22 +1,38 @@
 package ua.acclorite.book_story.presentation.screens.about.components
 
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.StrokeCap
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import ua.acclorite.book_story.presentation.ui.FadeTransitionPreservingSpace
 
 /**
- * About screen item.
+ * About Screen Item.
+ * Clickable item, that has title, description and loading state.
+ *
+ * @param modifier [Modifier].
+ * @param title Title of the item.
+ * @param description Description of the item.
+ * @param verticalPadding Vertical item padding.
+ * @param showLoading Whether loading indicator is shown.
+ * @param isOnClickEnabled Whether this item is clickable.
+ * @param onClick OnClick callback.
  */
 @Composable
 fun AboutItem(
@@ -24,18 +40,20 @@ fun AboutItem(
     title: String,
     description: AnnotatedString?,
     verticalPadding: Dp = 12.dp,
+    showLoading: Boolean = false,
     isOnClickEnabled: Boolean = true,
     onClick: () -> Unit = {}
 ) {
-    Column(
+    Row(
         modifier
             .fillMaxWidth()
             .clickable(enabled = isOnClickEnabled) {
                 onClick()
             }
             .padding(horizontal = 18.dp, vertical = verticalPadding),
-        verticalArrangement = Arrangement.Center
+        verticalAlignment = Alignment.CenterVertically
     ) {
+        Column(Modifier.weight(1f)) {
             Text(
                 title,
                 style = MaterialTheme.typography.bodyLarge,
@@ -51,4 +69,16 @@ fun AboutItem(
                 )
             }
         }
+
+        FadeTransitionPreservingSpace(visible = showLoading) {
+            Row {
+                Spacer(modifier = Modifier.width(18.dp))
+                CircularProgressIndicator(
+                    color = MaterialTheme.colorScheme.onSurface,
+                    strokeCap = StrokeCap.Round,
+                    modifier = Modifier.size(28.dp)
+                )
+            }
+        }
+    }
 }

app/src/main/java/ua/acclorite/book_story/presentation/screens/about/data/AboutState.kt

@@ -6,5 +6,7 @@ import ua.acclorite.book_story.data.remote.dto.LatestReleaseInfo
 @Immutable
 data class AboutState(
     val showUpdateDialog: Boolean = false,
+    val alreadyCheckedForUpdates: Boolean = false,
+    val updateLoading: Boolean = false,
     val updateInfo: LatestReleaseInfo? = null
 )

app/src/main/java/ua/acclorite/book_story/presentation/screens/about/data/AboutViewModel.kt

@@ -40,9 +40,19 @@ class AboutViewModel @Inject constructor(
 
             is AboutEvent.OnCheckForUpdates -> {
                 viewModelScope.launch {
+                    _state.update {
+                        it.copy(
+                            updateLoading = true
+                        )
+                    }
                     val result = checkForUpdates.execute(false)
 
                     if (result == null) {
+                        _state.update {
+                            it.copy(
+                                updateLoading = false
+                            )
+                        }
                         event.error()
                         return@launch
                     }
@@ -52,12 +62,19 @@ class AboutViewModel @Inject constructor(
 
                     if (version == currentVersion) {
                         event.noUpdatesFound()
+                        _state.update {
+                            it.copy(
+                                updateLoading = false,
+                                alreadyCheckedForUpdates = true
+                            )
+                        }
                         return@launch
                     }
 
                     _state.update {
                         it.copy(
                             showUpdateDialog = true,
+                            updateLoading = false,
                             updateInfo = result
                         )
                     }

app/src/main/java/ua/acclorite/book_story/presentation/ui/Transitions.kt

@@ -1,5 +1,8 @@
 package ua.acclorite.book_story.presentation.ui
 
+import androidx.compose.animation.core.AnimationSpec
+import androidx.compose.animation.core.EaseInOut
+import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -8,8 +11,11 @@ import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideInVertically
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.slideOutVertically
+import androidx.compose.foundation.layout.Box
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.unit.dp
 import ua.acclorite.book_story.presentation.components.CustomAnimatedVisibility
@@ -87,3 +93,21 @@ fun SlidingTransition(
         content = content
     )
 }
+
+@Composable
+fun FadeTransitionPreservingSpace(
+    visible: Boolean,
+    modifier: Modifier = Modifier,
+    animationSpec: AnimationSpec<Float> = tween(durationMillis = 300, easing = EaseInOut),
+    content: @Composable () -> Unit
+) {
+    val alpha by animateFloatAsState(
+        if (visible) 1f else 0f,
+        label = "",
+        animationSpec = animationSpec
+    )
+
+    Box(modifier = modifier.alpha(alpha)) {
+        content.invoke()
+    }
+}