refactor: history viewmodel

2025-08-09 10:11:47 +03:00 · 2025-08-09 10:11:47 +03:00 · 28cbf1188d
commit 28cbf1188d
parent eb87ef8b45
13 changed files with 320 additions and 261 deletions
--- a/app/src/main/java/ua/acclorite/book_story/domain/use_case/history/GetHistoryUseCase.kt
+++ b/app/src/main/java/ua/acclorite/book_story/domain/use_case/history/GetHistoryUseCase.kt
@ -9,23 +9,66 @@ package ua.acclorite.book_story.domain.use_case.history
 import ua.acclorite.book_story.core.log.logE
 import ua.acclorite.book_story.core.log.logI
 import ua.acclorite.book_story.domain.model.history.History
+import ua.acclorite.book_story.domain.repository.BookRepository
 import ua.acclorite.book_story.domain.repository.HistoryRepository
+import ua.acclorite.book_story.presentation.history.model.GroupedHistory
+import java.time.Instant
+import java.time.LocalDate
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
 import javax.inject.Inject

 class GetHistoryUseCase @Inject constructor(
+    private val bookRepository: BookRepository,
    private val historyRepository: HistoryRepository
 ) {

-    suspend operator fun invoke(): List<History> {
+    suspend operator fun invoke(query: String): List<GroupedHistory> {
        logI("Getting all history.")

-        return historyRepository.getHistory().fold(
+        fun getDayLabel(timeMillis: Long): String {
+            val historyDate = Instant.ofEpochMilli(timeMillis)
+                .atZone(ZoneId.systemDefault()).toLocalDate()
+            val today = LocalDate.now()
+            val yesterday = today.minusDays(1)
+
+            return when (historyDate) {
+                today -> "today"
+                yesterday -> "yesterday"
+                else -> historyDate.format(DateTimeFormatter.ofPattern("dd.MM.yy"))
+            }
+        }
+
+        fun filterMaxElementsById(elements: List<History>): List<History> {
+            val groupedById = elements.groupBy { it.bookId }
+            val maxElementsById = groupedById.map { (_, values) ->
+                values.maxByOrNull { it.time }
+            }
+            return maxElementsById.filterNotNull()
+        }
+
+        return runCatching {
+            historyRepository.getHistory().getOrThrow().sortedByDescending { it.time }
+                .mapNotNull { history ->
+                    val book = bookRepository.getBook(history.bookId).getOrNull()
+                    if (
+                        book == null
+                        || !book.title.lowercase().trim().contains(query.lowercase().trim())
+                    ) return@mapNotNull null
+
+                    history.copy(book = book)
+                }
+                .groupBy { history ->
+                    getDayLabel(history.time)
+                }
+                .map { (day, history) -> GroupedHistory(day, filterMaxElementsById(history)) }
+        }.fold(
            onSuccess = {
-                logI("Successfully got ${it.size} history entries.")
+                logI("Successfully got ${it.size} grouped history entries.")
                it
            },
            onFailure = {
-                logE("Could not get history entries with error: ${it.message}")
+                logE("Could not get grouped history entries with error: ${it.message}")
                emptyList()
            }
        )
--- a/app/src/main/java/ua/acclorite/book_story/presentation/about/AboutScreen.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/about/AboutScreen.kt
@ -27,7 +27,9 @@ object AboutScreen : Screen, Parcelable {

        val (scrollBehavior, listState) = TopAppBarDefaults.collapsibleTopAppBarScrollBehavior()

-        AboutEffects(screenModel.effects)
+        AboutEffects(
+            effects = screenModel.effects
+        )

        AboutContent(
            scrollBehavior = scrollBehavior,
--- a/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryEffect.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryEffect.kt
@ -0,0 +1,31 @@
+/*
+ * Book's Story — free and open-source Material You eBook reader.
+ * Copyright (C) 2024-2025 Acclorite
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package ua.acclorite.book_story.presentation.history
+
+import androidx.compose.runtime.Immutable
+import ua.acclorite.book_story.domain.model.history.History
+
+@Immutable
+sealed class HistoryEffect {
+    data object OnRequestFocus : HistoryEffect()
+
+    data class OnShowSnackbar(
+        val history: History
+    ) : HistoryEffect()
+
+    data object OnWholeHistoryDeleted : HistoryEffect()
+
+    data object OnNavigateToLibrary : HistoryEffect()
+
+    data class OnNavigateToBookInfo(
+        val bookId: Int
+    ) : HistoryEffect()
+
+    data class OnNavigateToReader(
+        val bookId: Int
+    ) : HistoryEffect()
+}
--- a/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryEvent.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryEvent.kt
@ -6,10 +6,7 @@

 package ua.acclorite.book_story.presentation.history

-import android.content.Context
-import androidx.compose.material3.SnackbarHostState
 import androidx.compose.runtime.Immutable
-import androidx.compose.ui.focus.FocusRequester
 import ua.acclorite.book_story.domain.model.history.History

@Immutable
@ -23,9 +20,7 @@ sealed class HistoryEvent {
        val show: Boolean
    ) : HistoryEvent()

-    data class OnRequestFocus(
-        val focusRequester: FocusRequester
-    ) : HistoryEvent()
+    data object OnRequestFocus : HistoryEvent()

    data class OnSearchQueryChange(
        val query: String
@ -34,16 +29,26 @@ sealed class HistoryEvent {
    data object OnSearch : HistoryEvent()

    data class OnDeleteHistoryEntry(
-        val history: History,
-        val snackbarState: SnackbarHostState,
-        val context: Context
+        val history: History
+    ) : HistoryEvent()
+
+    data class OnRestoreHistoryEntry(
+        val history: History
    ) : HistoryEvent()

    data object OnShowDeleteWholeHistoryDialog : HistoryEvent()

-    data class OnActionDeleteWholeHistoryDialog(
-        val context: Context
-    ) : HistoryEvent()
+    data object OnActionDeleteWholeHistoryDialog : HistoryEvent()

    data object OnDismissDialog : HistoryEvent()
+
+    data object OnNavigateToLibrary : HistoryEvent()
+
+    data class OnNavigateToBookInfo(
+        val bookId: Int
+    ) : HistoryEvent()
+
+    data class OnNavigateToReader(
+        val bookId: Int
+    ) : HistoryEvent()
 }
--- a/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryModel.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryModel.kt
@ -6,14 +6,16 @@

 package ua.acclorite.book_story.presentation.history

-import androidx.compose.material3.SnackbarResult
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.ensureActive
+import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.receiveAsFlow
@ -21,26 +23,18 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withContext
-import kotlinx.coroutines.yield
-import ua.acclorite.book_story.R
 import ua.acclorite.book_story.domain.model.history.History
-import ua.acclorite.book_story.domain.use_case.book.GetBookUseCase
 import ua.acclorite.book_story.domain.use_case.history.AddHistoryUseCase
 import ua.acclorite.book_story.domain.use_case.history.DeleteHistoryUseCase
 import ua.acclorite.book_story.domain.use_case.history.DeleteWholeHistoryUseCase
 import ua.acclorite.book_story.domain.use_case.history.GetHistoryUseCase
-import ua.acclorite.book_story.presentation.history.model.GroupedHistory
 import ua.acclorite.book_story.presentation.library.LibraryScreen
-import ua.acclorite.book_story.ui.common.helpers.showToast
-import java.text.SimpleDateFormat
-import java.util.Calendar
 import java.util.Date
-import java.util.Locale
 import javax.inject.Inject
+import kotlin.coroutines.coroutineContext

@HiltViewModel
 class HistoryModel @Inject constructor(
-    private val getBookUseCase: GetBookUseCase,
    private val getHistoryUseCase: GetHistoryUseCase,
    private val addHistoryUseCase: AddHistoryUseCase,
    private val deleteHistoryUseCase: DeleteHistoryUseCase,
@ -52,21 +46,21 @@ class HistoryModel @Inject constructor(
    private val _state = MutableStateFlow(HistoryState())
    val state = _state.asStateFlow()

+    private val _effects = MutableSharedFlow<HistoryEffect>()
+    val effects = _effects.asSharedFlow()
+
    init {
-        viewModelScope.launch(Dispatchers.IO) {
        onEvent(
            HistoryEvent.OnRefreshList(
                loading = true,
                hideSearch = true
            )
        )
-        }

        /* Observe channel - - - - - - - - - - - */
-        viewModelScope.launch(Dispatchers.IO) {
-            HistoryScreen.refreshListChannel.receiveAsFlow().collectLatest {
-                delay(it)
-                yield()
+        viewModelScope.launch {
+            HistoryScreen.refreshListChannel.receiveAsFlow().collectLatest { delay ->
+                delay(delay)

                onEvent(
                    HistoryEvent.OnRefreshList(
@ -76,18 +70,17 @@ class HistoryModel @Inject constructor(
                )
            }
        }
-        viewModelScope.launch(Dispatchers.IO) {
-            HistoryScreen.insertHistoryChannel.receiveAsFlow().collectLatest {
+        viewModelScope.launch {
+            HistoryScreen.insertHistoryChannel.receiveAsFlow().collectLatest { bookId ->
                addHistoryUseCase(
                    History(
-                        bookId = it,
+                        bookId = bookId,
                        book = null,
                        time = Date().time
                    )
                )

                delay(500)
-                yield()

                onEvent(
                    HistoryEvent.OnRefreshList(
@ -103,13 +96,13 @@ class HistoryModel @Inject constructor(

    private var refreshJob: Job? = null
    private var searchQueryChange: Job? = null
-    private var deleteHistoryEntry: Job? = null

    fun onEvent(event: HistoryEvent) {
+        viewModelScope.launch {
            when (event) {
                is HistoryEvent.OnRefreshList -> {
                    refreshJob?.cancel()
-                refreshJob = viewModelScope.launch(Dispatchers.IO) {
+                    refreshJob = viewModelScope.launch(Dispatchers.Default) {
                        _state.update {
                            it.copy(
                                isRefreshing = true,
@ -118,21 +111,28 @@ class HistoryModel @Inject constructor(
                            )
                        }

-                    yield()
-                    getHistoryFromDatabase()
-
-                    delay(500)
+                        ensureActive()
+                        val history = getHistoryUseCase(
+                            if (_state.value.showSearch) _state.value.searchQuery
+                            else ""
+                        )
                        _state.update {
                            it.copy(
-                            isRefreshing = false,
+                                history = history,
                                isLoading = false
                            )
                        }
+
+                        delay(500) // Delay for UI smoothness
+                        _state.update {
+                            it.copy(
+                                isRefreshing = false
+                            )
+                        }
                    }
                }

                is HistoryEvent.OnSearchVisibility -> {
-                viewModelScope.launch(Dispatchers.IO) {
                    if (!event.show) {
                        onEvent(
                            HistoryEvent.OnRefreshList(
@ -140,27 +140,20 @@ class HistoryModel @Inject constructor(
                                hideSearch = true
                            )
                        )
-                    } else {
-                        _state.update {
-                            it.copy(
-                                searchQuery = "",
-                                hasFocused = false
-                            )
-                        }
                    }

                    _state.update {
                        it.copy(
-                            showSearch = event.show
+                            showSearch = event.show,
+                            searchQuery = if (event.show) "" else it.searchQuery,
+                            hasFocused = if (event.show) false else it.hasFocused
                        )
                    }
                }
-            }

                is HistoryEvent.OnRequestFocus -> {
-                viewModelScope.launch(Dispatchers.Main) {
                    if (!_state.value.hasFocused) {
-                        event.focusRequester.requestFocus()
+                        _effects.emit(HistoryEffect.OnRequestFocus)
                        _state.update {
                            it.copy(
                                hasFocused = true
@ -168,26 +161,22 @@ class HistoryModel @Inject constructor(
                        }
                    }
                }
-            }

                is HistoryEvent.OnSearchQueryChange -> {
-                viewModelScope.launch {
                    _state.update {
                        it.copy(
                            searchQuery = event.query
                        )
                    }
+
                    searchQueryChange?.cancel()
-                    searchQueryChange = launch(Dispatchers.IO) {
+                    searchQueryChange = viewModelScope.launch(Dispatchers.IO) {
                        delay(500)
-                        yield()
                        onEvent(HistoryEvent.OnSearch)
                    }
                }
-            }

                is HistoryEvent.OnSearch -> {
-                viewModelScope.launch(Dispatchers.IO) {
                    onEvent(
                        HistoryEvent.OnRefreshList(
                            loading = false,
@ -195,10 +184,9 @@ class HistoryModel @Inject constructor(
                        )
                    )
                }
-            }

                is HistoryEvent.OnDeleteHistoryEntry -> {
-                viewModelScope.launch(Dispatchers.IO) {
+                    withContext(Dispatchers.Default) {
                        deleteHistoryUseCase(event.history)

                        onEvent(
@ -209,28 +197,13 @@ class HistoryModel @Inject constructor(
                        )
                        LibraryScreen.refreshListChannel.trySend(0)

-                    deleteHistoryEntry?.cancel()
-                    event.snackbarState.currentSnackbarData?.dismiss()
-
-                    deleteHistoryEntry = launch(Dispatchers.IO) {
-                        repeat(10) {
-                            yield()
-                            delay(1000)
+                        _effects.emit(HistoryEffect.OnShowSnackbar(event.history))
+                    }
                }

-                        yield()
-                        event.snackbarState.currentSnackbarData?.dismiss()
-                    }
-                    val snackbarResult = event.snackbarState.showSnackbar(
-                        event.context.getString(R.string.history_element_deleted),
-                        event.context.getString(R.string.undo)
-                    )
-
-                    when (snackbarResult) {
-                        SnackbarResult.Dismissed -> Unit
-                        SnackbarResult.ActionPerformed -> {
+                is HistoryEvent.OnRestoreHistoryEntry -> {
+                    withContext(Dispatchers.Default) {
                        addHistoryUseCase(event.history)
-                            LibraryScreen.refreshListChannel.trySend(0)

                        onEvent(
                            HistoryEvent.OnRefreshList(
@ -238,23 +211,20 @@ class HistoryModel @Inject constructor(
                                hideSearch = false
                            )
                        )
-                        }
-                    }
+                        LibraryScreen.refreshListChannel.trySend(0)
                    }
                }

                is HistoryEvent.OnShowDeleteWholeHistoryDialog -> {
-                viewModelScope.launch {
                    _state.update {
                        it.copy(
                            dialog = HistoryScreen.DELETE_WHOLE_HISTORY_DIALOG
                        )
                    }
                }
-            }

                is HistoryEvent.OnActionDeleteWholeHistoryDialog -> {
-                viewModelScope.launch {
+                    withContext(Dispatchers.Default) {
                        _state.update {
                            it.copy(
                                dialog = null,
@ -263,105 +233,45 @@ class HistoryModel @Inject constructor(
                        }

                        deleteWholeHistoryUseCase()
-                    LibraryScreen.refreshListChannel.trySend(0)
+
                        onEvent(
                            HistoryEvent.OnRefreshList(
                                loading = true,
                                hideSearch = true
                            )
                        )
+                        LibraryScreen.refreshListChannel.trySend(0)

-                    withContext(Dispatchers.Main) {
-                        event.context
-                            .getString(R.string.history_deleted)
-                            .showToast(context = event.context)
-                    }
+                        _effects.emit(HistoryEffect.OnWholeHistoryDeleted)
                    }
                }

                is HistoryEvent.OnDismissDialog -> {
-                viewModelScope.launch {
                    _state.update {
                        it.copy(
                            dialog = null
                        )
                    }
                }
-            }
-        }
+
+                is HistoryEvent.OnNavigateToLibrary -> {
+                    _effects.emit(HistoryEffect.OnNavigateToLibrary)
                }

-    private suspend fun getHistoryFromDatabase(
-        query: String = if (_state.value.showSearch) _state.value.searchQuery else ""
-    ) {
-        fun isSameDay(historyTime: Calendar, nowTime: Calendar): Boolean {
-            return historyTime.get(Calendar.YEAR) == nowTime.get(Calendar.YEAR) &&
-                    historyTime.get(Calendar.DAY_OF_YEAR) == nowTime.get(Calendar.DAY_OF_YEAR)
+                is HistoryEvent.OnNavigateToBookInfo -> {
+                    _effects.emit(HistoryEffect.OnNavigateToBookInfo(event.bookId))
                }

-        fun filterMaxElementsById(elements: List<History>): List<History> {
-            val groupedById = elements.groupBy { it.bookId }
-            val maxElementsById = groupedById.map { (_, values) ->
-                values.maxByOrNull { it.time }
+                is HistoryEvent.OnNavigateToReader -> {
+                    _effects.emit(HistoryEffect.OnNavigateToReader(event.bookId))
                }
-            return maxElementsById.filterNotNull()
            }
-
-        val history = getHistoryUseCase().sortedByDescending {
-            it.time
-        }.run {
-            val books = map { it.bookId }.distinct().mapNotNull {
-                getBookUseCase(it)
-            }.toMutableList()
-
-            mapNotNull {
-                val book = books.find { book -> book.id == it.bookId } ?: return@mapNotNull null
-                if (!book.title.lowercase().trim().contains(query.lowercase().trim())) {
-                    return@mapNotNull null
-                }
-
-                it.copy(book = book)
-            }
-        }.ifEmpty {
-            _state.update {
-                it.copy(
-                    history = emptyList(),
-                    isLoading = false
-                )
-            }
-            return
-        }.groupBy { item ->
-            val historyTime = Calendar.getInstance().apply {
-                timeInMillis = item.time
-            }
-            val nowTime = Calendar.getInstance()
-
-            return@groupBy when {
-                isSameDay(historyTime, nowTime) -> "today"
-
-                isSameDay(
-                    historyTime,
-                    nowTime.apply { add(Calendar.DAY_OF_YEAR, -1) }
-                ) -> "yesterday"
-
-                else -> SimpleDateFormat(
-                    "dd.MM.yy",
-                    Locale.getDefault()
-                ).format(item.time)
-            }
-        }.map { (day, history) -> GroupedHistory(day, filterMaxElementsById(history)) }
-
-        _state.update {
-            it.copy(
-                history = history,
-                isLoading = false,
-            )
        }
    }

    private suspend inline fun <T> MutableStateFlow<T>.update(function: (T) -> T) {
        mutex.withLock {
-            yield()
+            coroutineContext.ensureActive()
            this.value = function(this.value)
        }
    }
--- a/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryScreen.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/history/HistoryScreen.kt
@ -22,12 +22,9 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import kotlinx.coroutines.channels.Channel
 import kotlinx.parcelize.IgnoredOnParcel
 import kotlinx.parcelize.Parcelize
-import ua.acclorite.book_story.presentation.book_info.BookInfoScreen
-import ua.acclorite.book_story.presentation.library.LibraryScreen
 import ua.acclorite.book_story.presentation.navigator.Screen
-import ua.acclorite.book_story.presentation.reader.ReaderScreen
 import ua.acclorite.book_story.ui.history.HistoryContent
-import ua.acclorite.book_story.ui.navigator.LocalNavigator
+import ua.acclorite.book_story.ui.history.HistoryEffects

@Parcelize
 object HistoryScreen : Screen, Parcelable {
@ -49,7 +46,6 @@ object HistoryScreen : Screen, Parcelable {

    @Composable
    override fun Content() {
-        val navigator = LocalNavigator.current
        val screenModel = hiltViewModel<HistoryModel>()

        val state = screenModel.state.collectAsStateWithLifecycle()
@ -79,6 +75,13 @@ object HistoryScreen : Screen, Parcelable {
            }
        )

+        HistoryEffects(
+            effects = screenModel.effects,
+            focusRequester = focusRequester,
+            snackbarState = snackbarState,
+            restoreHistoryEntry = screenModel::onEvent
+        )
+
        HistoryContent(
            refreshState = refreshState,
            snackbarState = snackbarState,
@ -100,16 +103,9 @@ object HistoryScreen : Screen, Parcelable {
            showDeleteWholeHistoryDialog = screenModel::onEvent,
            actionDeleteWholeHistoryDialog = screenModel::onEvent,
            dismissDialog = screenModel::onEvent,
-            navigateToLibrary = {
-                navigator.push(LibraryScreen, saveInBackStack = false)
-            },
-            navigateToBookInfo = {
-                navigator.push(BookInfoScreen(bookId = it))
-            },
-            navigateToReader = {
-                insertHistoryChannel.trySend(it)
-                navigator.push(ReaderScreen(it))
-            }
+            navigateToLibrary = screenModel::onEvent,
+            navigateToBookInfo = screenModel::onEvent,
+            navigateToReader = screenModel::onEvent
        )
    }
 }
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryBackHandler.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryBackHandler.kt
@ -14,7 +14,7 @@ import ua.acclorite.book_story.presentation.history.HistoryEvent
 fun HistoryBackHandler(
    showSearch: Boolean,
    searchVisibility: (HistoryEvent.OnSearchVisibility) -> Unit,
-    navigateToLibrary: () -> Unit
+    navigateToLibrary: (HistoryEvent.OnNavigateToLibrary) -> Unit
 ) {
    BackHandler {
        if (showSearch) {
@ -22,6 +22,6 @@ fun HistoryBackHandler(
            return@BackHandler
        }

-        navigateToLibrary()
+        navigateToLibrary(HistoryEvent.OnNavigateToLibrary)
    }
 }
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryContent.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryContent.kt
@ -39,9 +39,9 @@ fun HistoryContent(
    showDeleteWholeHistoryDialog: (HistoryEvent.OnShowDeleteWholeHistoryDialog) -> Unit,
    actionDeleteWholeHistoryDialog: (HistoryEvent.OnActionDeleteWholeHistoryDialog) -> Unit,
    dismissDialog: (HistoryEvent.OnDismissDialog) -> Unit,
-    navigateToLibrary: () -> Unit,
-    navigateToBookInfo: (Int) -> Unit,
-    navigateToReader: (Int) -> Unit
+    navigateToLibrary: (HistoryEvent.OnNavigateToLibrary) -> Unit,
+    navigateToBookInfo: (HistoryEvent.OnNavigateToBookInfo) -> Unit,
+    navigateToReader: (HistoryEvent.OnNavigateToReader) -> Unit
 ) {
    HistoryDialog(
        dialog = dialog,
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryDeleteWholeHistoryDialog.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryDeleteWholeHistoryDialog.kt
@ -9,7 +9,6 @@ package ua.acclorite.book_story.ui.history
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.DeleteOutline
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import ua.acclorite.book_story.R
 import ua.acclorite.book_story.presentation.history.HistoryEvent
@ -20,7 +19,6 @@ fun HistoryDeleteWholeHistoryDialog(
    actionDeleteWholeHistoryDialog: (HistoryEvent.OnActionDeleteWholeHistoryDialog) -> Unit,
    dismissDialog: (HistoryEvent.OnDismissDialog) -> Unit
 ) {
-    val context = LocalContext.current
    Dialog(
        title = stringResource(id = R.string.delete_history),
        icon = Icons.Outlined.DeleteOutline,
@ -30,11 +28,7 @@ fun HistoryDeleteWholeHistoryDialog(
            dismissDialog(HistoryEvent.OnDismissDialog)
        },
        onAction = {
-            actionDeleteWholeHistoryDialog(
-                HistoryEvent.OnActionDeleteWholeHistoryDialog(
-                    context = context
-                )
-            )
+            actionDeleteWholeHistoryDialog(HistoryEvent.OnActionDeleteWholeHistoryDialog)
        },
        withContent = false
    )
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryEffects.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryEffects.kt
@ -0,0 +1,78 @@
+/*
+ * Book's Story — free and open-source Material You eBook reader.
+ * Copyright (C) 2024-2025 Acclorite
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package ua.acclorite.book_story.ui.history
+
+import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.SnackbarResult
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.platform.LocalContext
+import kotlinx.coroutines.flow.SharedFlow
+import ua.acclorite.book_story.R
+import ua.acclorite.book_story.presentation.book_info.BookInfoScreen
+import ua.acclorite.book_story.presentation.history.HistoryEffect
+import ua.acclorite.book_story.presentation.history.HistoryEvent
+import ua.acclorite.book_story.presentation.history.HistoryScreen.insertHistoryChannel
+import ua.acclorite.book_story.presentation.library.LibraryScreen
+import ua.acclorite.book_story.presentation.reader.ReaderScreen
+import ua.acclorite.book_story.ui.common.helpers.showToast
+import ua.acclorite.book_story.ui.navigator.LocalNavigator
+
+@Composable
+fun HistoryEffects(
+    effects: SharedFlow<HistoryEffect>,
+    focusRequester: FocusRequester,
+    snackbarState: SnackbarHostState,
+    restoreHistoryEntry: (HistoryEvent.OnRestoreHistoryEntry) -> Unit
+) {
+    val navigator = LocalNavigator.current
+    val context = LocalContext.current
+
+    LaunchedEffect(Unit) {
+        effects.collect { effect ->
+            when (effect) {
+                is HistoryEffect.OnRequestFocus -> {
+                    focusRequester.requestFocus()
+                }
+
+                is HistoryEffect.OnShowSnackbar -> {
+                    val snackbarResult = snackbarState.showSnackbar(
+                        context.getString(R.string.history_element_deleted),
+                        context.getString(R.string.undo)
+                    )
+
+                    if (snackbarResult == SnackbarResult.ActionPerformed) {
+                        restoreHistoryEntry(
+                            HistoryEvent.OnRestoreHistoryEntry(
+                                history = effect.history
+                            )
+                        )
+                    }
+                }
+
+                is HistoryEffect.OnWholeHistoryDeleted -> {
+                    context.getString(R.string.history_deleted)
+                        .showToast(context = context)
+                }
+
+                is HistoryEffect.OnNavigateToLibrary -> {
+                    navigator.push(LibraryScreen, saveInBackStack = false)
+                }
+
+                is HistoryEffect.OnNavigateToBookInfo -> {
+                    navigator.push(BookInfoScreen(bookId = effect.bookId))
+                }
+
+                is HistoryEffect.OnNavigateToReader -> {
+                    insertHistoryChannel.trySend(effect.bookId)
+                    navigator.push(ReaderScreen(bookId = effect.bookId))
+                }
+            }
+        }
+    }
+}
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryLayout.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryLayout.kt
@ -11,7 +11,6 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
-import androidx.compose.material3.SnackbarHostState
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
@ -21,7 +20,6 @@ import ua.acclorite.book_story.presentation.history.HistoryEvent
 import ua.acclorite.book_story.presentation.history.model.GroupedHistory
 import ua.acclorite.book_story.ui.common.components.common.LazyColumnWithScrollbar
 import ua.acclorite.book_story.ui.common.data.ScrollbarData
-import ua.acclorite.book_story.ui.common.helpers.LocalActivity
 import ua.acclorite.book_story.ui.settings.components.SettingsSubcategoryTitle
 import ua.acclorite.book_story.ui.theme.DefaultTransition

@ -29,15 +27,12 @@ import ua.acclorite.book_story.ui.theme.DefaultTransition
 fun HistoryLayout(
    listState: LazyListState,
    history: List<GroupedHistory>,
-    snackbarState: SnackbarHostState,
    isLoading: Boolean,
    isRefreshing: Boolean,
    deleteHistoryEntry: (HistoryEvent.OnDeleteHistoryEntry) -> Unit,
-    navigateToBookInfo: (Int) -> Unit,
-    navigateToReader: (Int) -> Unit,
+    navigateToBookInfo: (HistoryEvent.OnNavigateToBookInfo) -> Unit,
+    navigateToReader: (HistoryEvent.OnNavigateToReader) -> Unit,
 ) {
-    val context = LocalActivity.current
-
    DefaultTransition(visible = !isLoading) {
        LazyColumnWithScrollbar(
            modifier = Modifier.fillMaxSize(),
@ -75,17 +70,23 @@ fun HistoryLayout(
                        historyEntry = historyEntry,
                        isRefreshing = isRefreshing,
                        onBodyClick = {
-                            navigateToBookInfo(historyEntry.bookId)
+                            navigateToBookInfo(
+                                HistoryEvent.OnNavigateToBookInfo(
+                                    historyEntry.bookId
+                                )
+                            )
                        },
                        onTitleClick = {
-                            navigateToReader(historyEntry.bookId)
+                            navigateToReader(
+                                HistoryEvent.OnNavigateToReader(
+                                    historyEntry.bookId
+                                )
+                            )
                        },
                        onDeleteClick = {
                            deleteHistoryEntry(
                                HistoryEvent.OnDeleteHistoryEntry(
-                                    history = historyEntry,
-                                    snackbarState = snackbarState,
-                                    context = context,
+                                    history = historyEntry
                                )
                            )
                        }
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryScaffold.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryScaffold.kt
@ -43,8 +43,8 @@ fun HistoryScaffold(
    deleteHistoryEntry: (HistoryEvent.OnDeleteHistoryEntry) -> Unit,
    showDeleteWholeHistoryDialog: (HistoryEvent.OnShowDeleteWholeHistoryDialog) -> Unit,
    search: (HistoryEvent.OnSearch) -> Unit,
-    navigateToBookInfo: (Int) -> Unit,
-    navigateToReader: (Int) -> Unit
+    navigateToBookInfo: (HistoryEvent.OnNavigateToBookInfo) -> Unit,
+    navigateToReader: (HistoryEvent.OnNavigateToReader) -> Unit
 ) {
    Scaffold(
        Modifier
@ -79,7 +79,6 @@ fun HistoryScaffold(
            HistoryLayout(
                listState = listState,
                history = history,
-                snackbarState = snackbarState,
                isLoading = isLoading,
                isRefreshing = isRefreshing,
                deleteHistoryEntry = deleteHistoryEntry,
--- a/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryTopBar.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/history/HistoryTopBar.kt
@ -98,7 +98,7 @@ fun HistoryTopBar(
                        modifier = Modifier
                            .focusRequester(focusRequester)
                            .onGloballyPositioned {
-                                requestFocus(HistoryEvent.OnRequestFocus(focusRequester))
+                                requestFocus(HistoryEvent.OnRequestFocus)
                            },
                        initialQuery = searchQuery,
                        onQueryChange = {