Convert the AdventureDetailScreen to flow instead of snapshot.

app/src/main/java/com/pixelized/rplexicon/data/repository/adventure/AdventureRepository.kt

@@ -17,8 +17,10 @@ import com.pixelized.rplexicon.utilitary.exceptions.IncompatibleSheetStructure
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -32,7 +34,7 @@ class AdventureRepository @Inject constructor(
     private val adventureStoryLineParser: AdventureStoryLineParser,
     private val adventureDboFactory: AdventureDboFactory,
 ) {
-    val adventure = database.adventureDao().let { database ->
+    private val adventures = database.adventureDao().let { database ->
         combine(
             database.getBooksFlow(),
             database.getStoriesFlow(),
@@ -50,6 +52,31 @@ class AdventureRepository @Inject constructor(
         )
     }
 
+    fun bookFlow(): Flow<List<Adventure>> {
+        return adventures
+    }
+
+    fun storyFlow(
+        bookTitle: String,
+    ): Flow<List<Adventure>> {
+        return adventures.map { adventures ->
+            adventures.filter { adventure ->
+                adventure.bookTitle == bookTitle
+            }
+        }
+    }
+
+    fun adventureFlow(
+        bookTitle: String,
+        adventureTitle: String,
+    ): Flow<Adventure?> {
+        return adventures.map { adventures ->
+            adventures.firstOrNull { adventure ->
+                adventure.bookTitle == bookTitle && adventure.storyTitle == adventureTitle
+            }
+        }
+    }
+
     @Throws(IncompatibleSheetStructure::class, Exception::class)
     suspend fun fetchBooks() {
         val database = database.adventureDao()
@@ -177,18 +204,6 @@ class AdventureRepository @Inject constructor(
         )
     }
 
-    fun find(bookTitle: String): List<Adventure> {
-        return adventure.value.filter { adventure ->
-            adventure.bookTitle == bookTitle
-        }
-    }
-
-    fun find(bookTitle: String, adventureTitle: String): Adventure? {
-        return adventure.value.firstOrNull { adventure ->
-            adventure.bookTitle == bookTitle && adventure.storyTitle == adventureTitle
-        }
-    }
-
     @Throws(IncompatibleSheetStructure::class, Exception::class)
     private suspend fun fetchAdventureBooks(): List<AdventureBook> {
         return googleRepository.fetch { sheet ->

app/src/main/java/com/pixelized/rplexicon/ui/screens/adventure/book/AdventureBooksViewModel.kt

@@ -29,7 +29,7 @@ class AdventureBooksViewModel @Inject constructor(
     private val _isLoading = mutableStateOf(false)
     val isLoading: State<Boolean> get() = _isLoading
 
-    private val _books = adventureRepository.adventure
+    private val _books = adventureRepository.bookFlow()
         .map { adventures ->
             adventures
                 .map { adventure ->

app/src/main/java/com/pixelized/rplexicon/ui/screens/adventure/chapter/AdventureStoriesViewModel.kt

@@ -36,7 +36,7 @@ class AdventureStoriesViewModel @Inject constructor(
         argument.bookTitle
     }
 
-    private val _chapters = adventureRepository.adventure
+    private val _chapters = adventureRepository.storyFlow(bookTitle = argument.bookTitle)
         .map { adventures ->
             adventures
                 .filter { it.bookTitle == argument.bookTitle && it.documentId == argument.documentId }

app/src/main/java/com/pixelized/rplexicon/ui/screens/adventure/detail/AdventureDetailViewModel.kt

@@ -1,14 +1,22 @@
 package com.pixelized.rplexicon.ui.screens.adventure.detail
 
+import android.net.Uri
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.derivedStateOf
-import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import com.pixelized.rplexicon.data.model.adventure.AdventureLine.Format
 import com.pixelized.rplexicon.data.repository.adventure.AdventureRepository
 import com.pixelized.rplexicon.ui.navigation.screens.adventureDetailArgument
 import com.pixelized.rplexicon.ui.screens.adventure.detail.AdventureLineUio.Style
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
 import javax.inject.Inject
 
 @HiltViewModel
@@ -17,19 +25,28 @@ class AdventureDetailViewModel @Inject constructor(
     savedStateHandle: SavedStateHandle,
 ) : ViewModel() {
     private val argument = savedStateHandle.adventureDetailArgument
-    private val _detail = mutableStateOf(
+
-        adventureRepository.find(
+    private val detail = adventureRepository.adventureFlow(
         bookTitle = argument.bookTitle,
         adventureTitle = argument.adventureTitle,
-        )
+    ).stateIn(
+        scope = viewModelScope,
+        started = SharingStarted.Lazily,
+        initialValue = null,
     )
 
-    val background = derivedStateOf {
+    val background: State<Uri?>
-        _detail.value?.storyBackground
+        @Composable
-    }
+        get() = remember(detail) {
+            detail.map { it?.storyBackground }
+        }.collectAsState(initial = null)
 
-    val adventure = derivedStateOf {
+    val adventure: State<List<AdventureLineUio>>
-        _detail.value?.story?.map { line ->
+        @Composable
+        get() = remember(detail) {
+            detail
+                .map { adventure ->
+                    adventure?.story?.map { line ->
                         AdventureLineUio(
                             text = line.text,
                             style = when (line.format) {
@@ -44,17 +61,40 @@ class AdventureDetailViewModel @Inject constructor(
                         )
                     } ?: emptyList()
                 }
+        }.collectAsState(initial = emptyList())
 
-    private val titleCell = derivedStateOf {
+    private val titleCell: State<AdventureLineUio?>
-        adventure.value.let { adventures ->
+        @Composable
+        get() = adventure.let { state ->
+            remember(state) {
+                derivedStateOf {
+                    state.value.let { adventures ->
                         adventures.firstOrNull { it.style == Style.TITLE }
                             ?: adventures.firstOrNull()
                     }
                 }
-    val title = derivedStateOf {
-        titleCell.value?.text ?: ""
             }
-    val titleIndex = derivedStateOf {
+        }
-        adventure.value.indexOf(titleCell.value)
+
+    val title: State<String>
+        @Composable
+        get() = titleCell.let { state ->
+            remember(state) {
+                derivedStateOf {
+                    state.value?.text ?: ""
+                }
+            }
+        }
+
+    val titleIndex: State<Int>
+        @Composable
+        get() {
+            val cell = titleCell
+            val adv = adventure
+            return remember(cell, adv) {
+                derivedStateOf {
+                    adv.value.indexOf(cell.value)
+                }
+            }
         }
 }