- Introduce TopicUi data class to represent topic data for the UI layer.

yesshreyes · yesshreyes · commit 6a86cbe74f21 · 2025-06-06T22:13:16.000+05:30
- Update `TopicViewModel` to emit `TopicUi` objects, including initial and bookmarked status.
- Modify `TopicCard`, `TopicList`, and `TopicScreenUI` to consume `TopicUi`.
- Update previews to use `TopicUi` and sample data.
diff --git a/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/PreviewUtils.kt b/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/PreviewUtils.kt
@@ -5,6 +5,7 @@ import com.developersbreach.kotlindictionarymultiplatform.data.detail.model.Kotl
 import com.developersbreach.kotlindictionarymultiplatform.data.detail.model.Section
 import com.developersbreach.kotlindictionarymultiplatform.data.detail.model.Syntax
 import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.Topic
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 
 fun sampleCodeSnippet(): String = """
     fun greet(name: String): String {
@@ -52,4 +53,13 @@ fun sampleTopicList(): List<Topic> = listOf(
     Topic("Coroutines"),
     Topic("Lambdas"),
     Topic("Sealed Classes"),
-)
+)
+
+fun sampleTopicUiList(): List<TopicUi> =
+    sampleTopicList().map { topic ->
+        TopicUi(
+            name = topic.name,
+            initial = topic.name.firstOrNull()?.uppercase() ?: "",
+            isBookmarked = true,
+        )
+    }
diff --git a/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicCardPreview.kt b/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicCardPreview.kt
@@ -2,6 +2,7 @@ package com.developersbreach.kotlindictionarymultiplatform.previews.topic
 
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.PreviewLightDark
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 import com.developersbreach.kotlindictionarymultiplatform.previews.subtitle
 import com.developersbreach.kotlindictionarymultiplatform.previews.topic
 import com.developersbreach.kotlindictionarymultiplatform.ui.screens.topic.TopicCard
@@ -17,6 +18,11 @@ fun TopicCardPreview() {
             isBookmarked = false,
             onBookmarkClick = {},
             onCardClick = {},
+            topicUi = TopicUi(
+                name = "Emerson Vega",
+                initial = "senectus",
+                isBookmarked = false,
+            ),
         )
     }
 }
diff --git a/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicListPreview.kt b/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicListPreview.kt
@@ -3,6 +3,7 @@ package com.developersbreach.kotlindictionarymultiplatform.previews.topic
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.PreviewLightDark
 import com.developersbreach.kotlindictionarymultiplatform.previews.sampleTopicList
+import com.developersbreach.kotlindictionarymultiplatform.previews.sampleTopicUiList
 import com.developersbreach.kotlindictionarymultiplatform.ui.screens.topic.TopicList
 import com.developersbreach.kotlindictionarymultiplatform.ui.theme.KotlinDictionaryTheme
 
@@ -11,7 +12,7 @@ import com.developersbreach.kotlindictionarymultiplatform.ui.theme.KotlinDiction
 fun TopicListPreview() {
     KotlinDictionaryTheme {
         TopicList(
-            topics = sampleTopicList(),
+            topics = sampleTopicUiList(),
             bookmarkedStates = List(sampleTopicList().size) { true },
             onBookmarkClick = {},
             onTopicClick = {},
diff --git a/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicScreenPreview.kt b/composeApp/src/androidMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/previews/topic/TopicScreenPreview.kt
@@ -5,6 +5,7 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.tooling.preview.PreviewLightDark
 import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.Topic
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 import com.developersbreach.kotlindictionarymultiplatform.previews.sampleTopicList
 import com.developersbreach.kotlindictionarymultiplatform.ui.components.UiState
 import com.developersbreach.kotlindictionarymultiplatform.ui.components.UiStateHandler
@@ -17,7 +18,15 @@ import kotlinx.coroutines.flow.StateFlow
 class FakeTopicViewModel : TopicViewModelFakeBase() {
     override val topics = MutableStateFlow<UiState<List<Topic>>>(UiState.Success(sampleTopicList()))
     override val searchQuery = MutableStateFlow("")
-    override val filteredTopics = MutableStateFlow(sampleTopicList())
+    override val filteredTopics = MutableStateFlow(
+        sampleTopicList().map { topic ->
+            TopicUi(
+                name = topic.name,
+                initial = topic.name.firstOrNull()?.uppercase() ?: "",
+                isBookmarked = true,
+            )
+        },
+    )
     override val bookmarkedStates = MutableStateFlow(List(sampleTopicList().size) { true })
 
     override fun updateSearchQuery(newQuery: String) {}
@@ -29,7 +38,7 @@ class FakeTopicViewModel : TopicViewModelFakeBase() {
 abstract class TopicViewModelFakeBase {
     abstract val topics: StateFlow<UiState<List<Topic>>>
     abstract val searchQuery: StateFlow<String>
-    abstract val filteredTopics: StateFlow<List<Topic>>
+    abstract val filteredTopics: StateFlow<List<TopicUi>>
     abstract val bookmarkedStates: StateFlow<List<Boolean>>
 
     abstract fun updateSearchQuery(newQuery: String)
diff --git a/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/data/topic/model/TopicUi.kt b/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/data/topic/model/TopicUi.kt
@@ -0,0 +1,7 @@
+package com.developersbreach.kotlindictionarymultiplatform.data.topic.model
+
+data class TopicUi(
+    val name: String,
+    val initial: String,
+    val isBookmarked: Boolean,
+)
diff --git a/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicCard.kt b/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicCard.kt
@@ -27,13 +27,15 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.shadow
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 import kotlindictionarymultiplatform.composeapp.generated.resources.Res
 import kotlindictionarymultiplatform.composeapp.generated.resources.add_bookmark
 import kotlindictionarymultiplatform.composeapp.generated.resources.remove_bookmark
 import org.jetbrains.compose.resources.stringResource
 
 @Composable
 fun TopicCard(
+    topicUi: TopicUi?,
     topic: String,
     subtitle: String,
     isBookmarked: Boolean,
@@ -61,12 +63,9 @@ fun TopicCard(
                     .background(MaterialTheme.colorScheme.primary, CircleShape),
                 contentAlignment = Alignment.Center,
             ) {
-                Text(
-                    text = topic.firstOrNull()?.uppercase() ?: "?",
-                    style = MaterialTheme.typography.bodyLarge.copy(
-                        color = MaterialTheme.colorScheme.onPrimary,
-                    ),
-                )
+                if (topicUi != null) {
+                    Text(text = topicUi.initial)
+                }
             }
 
             Spacer(modifier = Modifier.width(12.dp))
diff --git a/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicList.kt b/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicList.kt
@@ -7,14 +7,14 @@ import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
-import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.Topic
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 import kotlindictionarymultiplatform.composeapp.generated.resources.Res
 import kotlindictionarymultiplatform.composeapp.generated.resources.description_subtitle
 import org.jetbrains.compose.resources.stringResource
 
 @Composable
 fun TopicList(
-    topics: List<Topic>,
+    topics: List<TopicUi>,
     bookmarkedStates: List<Boolean>,
     onBookmarkClick: (Int) -> Unit,
     onTopicClick: (String) -> Unit,
@@ -27,6 +27,7 @@ fun TopicList(
             val isBookmarked = bookmarkedStates.getOrNull(index) ?: true
             TopicCard(
                 topic = topic.name,
+                topicUi = topic,
                 subtitle = stringResource(Res.string.description_subtitle),
                 isBookmarked = isBookmarked,
                 onBookmarkClick = { onBookmarkClick(index) },
diff --git a/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicScreenUI.kt b/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicScreenUI.kt
@@ -9,11 +9,11 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
-import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.Topic
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 
 @Composable
 fun TopicScreenUI(
-    topics: List<Topic>,
+    topics: List<TopicUi>,
     bookmarkedStates: List<Boolean>,
     searchQuery: String,
     onQueryChange: (String) -> Unit,
diff --git a/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicViewModel.kt b/composeApp/src/commonMain/kotlin/com/developersbreach/kotlindictionarymultiplatform/ui/screens/topic/TopicViewModel.kt
@@ -4,6 +4,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.developersbreach.kotlindictionarymultiplatform.Log
 import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.Topic
+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi
 import com.developersbreach.kotlindictionarymultiplatform.data.topic.repository.TopicRepository
 import com.developersbreach.kotlindictionarymultiplatform.ui.components.UiState
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -28,15 +29,18 @@ class TopicViewModel(
     private val _bookmarkedStates = MutableStateFlow<List<Boolean>>(emptyList())
     val bookmarkedStates: StateFlow<List<Boolean>> = _bookmarkedStates
 
-    val filteredTopics: StateFlow<List<Topic>> = combine(_topics, _searchQuery) { uiState, query ->
+    val filteredTopics: StateFlow<List<TopicUi>> = combine(_topics, _searchQuery, _bookmarkedStates) { uiState, query, bookmarks ->
         val allTopics = (uiState as? UiState.Success)?.data ?: return@combine emptyList()
-        if (query.isBlank()) {
-            allTopics
-        } else {
-            allTopics.filter {
-                it.name.contains(query, ignoreCase = true)
+
+        allTopics
+            .withIndex()
+            .map { (index, topic) ->
+                TopicUi(
+                    name = topic.name,
+                    initial = topic.name.first().uppercase(),
+                    isBookmarked = bookmarks.getOrNull(index) ?: false,
+                )
             }
-        }
     }.stateIn(viewModelScope, SharingStarted.Eagerly, emptyList())
 
     init {

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,7 @@ package com.developersbreach.kotlindictionarymultiplatform.previews.topic`
`2`	`2`
`3`	`3`	`import androidx.compose.runtime.Composable`
`4`	`4`	`import androidx.compose.ui.tooling.preview.PreviewLightDark`
	`5`	`+import com.developersbreach.kotlindictionarymultiplatform.data.topic.model.TopicUi`
`5`	`6`	`import com.developersbreach.kotlindictionarymultiplatform.previews.subtitle`
`6`	`7`	`import com.developersbreach.kotlindictionarymultiplatform.previews.topic`
`7`	`8`	`import com.developersbreach.kotlindictionarymultiplatform.ui.screens.topic.TopicCard`
`@@ -17,6 +18,11 @@ fun TopicCardPreview() {`
`17`	`18`	`isBookmarked = false,`
`18`	`19`	`onBookmarkClick = {},`
`19`	`20`	`onCardClick = {},`
	`21`	`+ topicUi = TopicUi(`
	`22`	`+ name = "Emerson Vega",`
	`23`	`+ initial = "senectus",`
	`24`	`+ isBookmarked = false,`
	`25`	`+ ),`
`20`	`26`	`)`
`21`	`27`	`}`
`22`	`28`	`}`