Migrated on-disk BookStores/ZimStores from ObjectBox to libkiwix.

app/src/main/java/org/kiwix/kiwixmobile/zimManager/OnlineLibraryManager.kt

@@ -16,13 +16,13 @@
  *
  */
 
-package org.kiwix.kiwixmobile.core.zim_manager
+package org.kiwix.kiwixmobile.zimManager
 
 import org.kiwix.kiwixmobile.core.entity.LibkiwixBook
 import org.kiwix.libkiwix.Library
 import org.kiwix.libkiwix.Manager
 
-class OnlineLibraryManager(val library: Library, val manager: Manager) {
+class OnlineLibraryManager(private val library: Library, private val manager: Manager) {
   suspend fun parseOPDSStream(content: String?, urlHost: String): Boolean =
     runCatching {
       manager.readOpds(content, urlHost)

app/src/main/java/org/kiwix/kiwixmobile/zimManager/ZimManageViewModel.kt

@@ -96,7 +96,6 @@ import org.kiwix.kiwixmobile.core.zim_manager.ConnectivityBroadcastReceiver
 import org.kiwix.kiwixmobile.core.zim_manager.Language
 import org.kiwix.kiwixmobile.core.zim_manager.NetworkState
 import org.kiwix.kiwixmobile.core.zim_manager.NetworkState.CONNECTED
-import org.kiwix.kiwixmobile.core.zim_manager.OnlineLibraryManager
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.BooksOnDiskListItem
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.BooksOnDiskListItem.BookOnDisk
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.SelectionMode.MULTI

core/detekt_baseline.xml

@@ -50,7 +50,6 @@
     <ID>PackageNaming:TagsView.kt$package org.kiwix.kiwixmobile.core.zim_manager</ID>
     <ID>PackageNaming:ConnectivityBroadcastReceiver.kt$package org.kiwix.kiwixmobile.core.zim_manager</ID>
     <ID>PackageNaming:NetworkState.kt$package org.kiwix.kiwixmobile.core.zim_manager</ID>
-    <ID>PackageNaming:OnlineLibraryManager.kt$package org.kiwix.kiwixmobile.core.zim_manager</ID>
     <ID>ReturnCount:FileUtils.kt$FileUtils$@JvmStatic fun getAllZimParts(book: Book): List&lt;File></ID>
     <ID>ReturnCount:FileUtils.kt$FileUtils$@JvmStatic suspend fun getLocalFilePathByUri( context: Context, uri: Uri ): String?</ID>
     <ID>ReturnCount:FileUtils.kt$FileUtils$@JvmStatic suspend fun hasPart(file: File): Boolean</ID>

core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookOnDisk.kt

@@ -0,0 +1,239 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2025 Kiwix <android.kiwix.org>
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package org.kiwix.kiwixmobile.core.dao
+
+import android.os.Build
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.mapLatest
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+import org.kiwix.kiwixmobile.core.dao.LibkiwixBookmarks.Companion.TAG
+import org.kiwix.kiwixmobile.core.di.modules.LOCAL_BOOKS_LIBRARY
+import org.kiwix.kiwixmobile.core.di.modules.LOCAL_BOOKS_MANAGER
+import org.kiwix.kiwixmobile.core.entity.LibkiwixBook
+import org.kiwix.kiwixmobile.core.extensions.isFileExist
+import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
+import org.kiwix.kiwixmobile.core.utils.files.Log
+import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.BooksOnDiskListItem.BookOnDisk
+import org.kiwix.libkiwix.Book
+import org.kiwix.libkiwix.Library
+import org.kiwix.libkiwix.Manager
+import java.io.File
+import javax.inject.Inject
+import javax.inject.Named
+
+class LibkiwixBookOnDisk @Inject constructor(
+  @Named(LOCAL_BOOKS_LIBRARY) private val library: Library,
+  @Named(LOCAL_BOOKS_MANAGER) private val manager: Manager,
+  private val sharedPreferenceUtil: SharedPreferenceUtil
+) {
+  private var libraryBooksList: List<String> = arrayListOf()
+  private var localBooksList: List<LibkiwixBook> = arrayListOf()
+
+  /**
+   * Request new data from Libkiwix when changes occur inside it; otherwise,
+   * return the previous data to avoid unnecessary data load on Libkiwix.
+   */
+  private var booksChanged: Boolean = false
+  private val localBookFolderPath: String by lazy {
+    if (Build.DEVICE.contains("generic")) {
+      // Workaround for emulators: Emulators have limited memory and
+      // restrictions on creating folders, so we will use the default
+      // path for saving the bookmark file.
+      sharedPreferenceUtil.context.filesDir.path
+    } else {
+      "${sharedPreferenceUtil.defaultStorage()}/ZIMFiles/"
+    }
+  }
+
+  private val libraryFile: File by lazy {
+    File("$localBookFolderPath/library.xml")
+  }
+
+  init {
+    // Check if ZIM files folder exist if not then create the folder first.
+    if (runBlocking { !File(localBookFolderPath).isFileExist() }) File(localBookFolderPath).mkdir()
+    // Check if library file exist if not then create the file to save the library with book information.
+    if (runBlocking { !libraryFile.isFileExist() }) libraryFile.createNewFile()
+    // set up manager to read the library from this file
+    manager.readFile(libraryFile.canonicalPath)
+  }
+
+  @Suppress("InjectDispatcher")
+  private val localBooksFlow: MutableStateFlow<List<LibkiwixBook>> by lazy {
+    MutableStateFlow<List<LibkiwixBook>>(emptyList()).also { flow ->
+      CoroutineScope(Dispatchers.IO).launch {
+        runCatching {
+          flow.emit(getBooksList())
+        }.onFailure { it.printStackTrace() }
+      }
+    }
+  }
+
+  private suspend fun getBooksList(dispatcher: CoroutineDispatcher = Dispatchers.IO): List<LibkiwixBook> =
+    withContext(dispatcher) {
+      if (!booksChanged && localBooksList.isNotEmpty()) {
+        // No changes, return the cached data
+        return@withContext localBooksList.distinctBy(LibkiwixBook::path)
+      }
+      // Retrieve the list of books from the library.
+      val booksIds = library.booksIds.toList()
+
+      // Create a list to store LibkiwixBook objects.
+      localBooksList =
+        booksIds.mapNotNull { bookId ->
+          val book = library.getBookById(bookId)
+          return@mapNotNull LibkiwixBook(book).also {
+            // set the books change to false to avoid reloading the data from libkiwix
+            booksChanged = false
+          }
+        }
+
+      return@withContext localBooksList.distinctBy(LibkiwixBook::path)
+    }
+
+  @OptIn(ExperimentalCoroutinesApi::class)
+  fun books(dispatcher: CoroutineDispatcher = Dispatchers.IO) =
+    localBooksFlow
+      .mapLatest { booksList ->
+        removeBooksThatAreInTrashFolder(booksList)
+        removeBooksThatDoNotExist(booksList.toMutableList())
+        booksList.mapNotNull { book ->
+          try {
+            if (book.zimReaderSource.exists() &&
+              !isInTrashFolder(book.zimReaderSource.toDatabase())
+            ) {
+              book
+            } else {
+              null
+            }
+          } catch (_: Exception) {
+            null
+          }
+        }
+      }
+      .map { it.map(::BookOnDisk) }
+      .flowOn(dispatcher)
+
+  suspend fun getBooks() = getBooksList().map(::BookOnDisk)
+
+  suspend fun insert(libkiwixBooks: List<Book>) {
+    withContext(Dispatchers.IO) {
+      val existingBookIds = library.booksIds.toSet()
+      val existingBookPaths = existingBookIds
+        .mapNotNull { id -> library.getBookById(id)?.path }
+        .toSet()
+
+      val newBooks = libkiwixBooks.filterNot { book ->
+        book.id in existingBookIds || book.path in existingBookPaths
+      }
+      newBooks.forEach { book ->
+        runCatching {
+          library.addBook(book)
+          Log.d(TAG, "Added book to library: ${book.title}, ID=${book.id}")
+        }.onFailure {
+          Log.e(TAG, "Failed to add book: ${book.title} - ${it.message}")
+        }
+      }
+
+      if (newBooks.isNotEmpty()) {
+        writeBookMarksAndSaveLibraryToFile()
+        updateLocalBooksFlow()
+      }
+    }
+  }
+
+  private fun addBookToLibraryIfNotExist(libKiwixBook: Book?) {
+    libKiwixBook?.let { book ->
+      if (!isBookAlreadyExistInLibrary(book.id)) {
+        library.addBook(libKiwixBook).also {
+          // now library has changed so update our library list.
+          libraryBooksList = library.booksIds.toList()
+          Log.e(
+            TAG,
+            "Added Book to Library:\n" +
+              "ZIM File Path: ${book.path}\n" +
+              "Book ID: ${book.id}\n" +
+              "Book Title: ${book.title}"
+          )
+        }
+      }
+    }
+  }
+
+  private fun isBookAlreadyExistInLibrary(bookId: String): Boolean {
+    if (libraryBooksList.isEmpty()) {
+      // store booksIds in a list to avoid multiple data call on libkiwix
+      libraryBooksList = library.booksIds.toList()
+    }
+    return libraryBooksList.any { it == bookId }
+  }
+
+  private suspend fun removeBooksThatDoNotExist(books: MutableList<LibkiwixBook>) {
+    delete(books.filterNot { it.zimReaderSource.exists() })
+  }
+
+  // Remove the existing books from database which are showing on the library screen.
+  private suspend fun removeBooksThatAreInTrashFolder(books: List<LibkiwixBook>) {
+    delete(books.filter { isInTrashFolder(it.zimReaderSource.toDatabase()) })
+  }
+
+  // Check if any existing ZIM file showing on the library screen which is inside the trash folder.
+  private suspend fun isInTrashFolder(filePath: String) =
+    Regex("/\\.Trash/").containsMatchIn(filePath)
+
+  private suspend fun delete(books: List<LibkiwixBook>) {
+    runCatching {
+      books.forEach {
+        library.removeBookById(it.id)
+      }
+    }.onFailure { it.printStackTrace() }
+    writeBookMarksAndSaveLibraryToFile()
+    // TODO test when getting books it will not goes to circular dependencies mode.
+    updateLocalBooksFlow()
+  }
+
+  fun delete(bookId: String) {
+    runCatching {
+      library.removeBookById(bookId)
+    }.onFailure { it.printStackTrace() }
+  }
+
+  /**
+   * Asynchronously writes the library data to their respective file in a background thread
+   * to prevent potential data loss and ensures that the library holds the updated ZIM file data.
+   */
+  private suspend fun writeBookMarksAndSaveLibraryToFile() {
+    // Save the library, which contains ZIM file data.
+    library.writeToFile(libraryFile.canonicalPath)
+    // set the bookmark change to true so that libkiwix will return the new data.
+    booksChanged = true
+  }
+
+  private suspend fun updateLocalBooksFlow() {
+    localBooksFlow.emit(getBooksList())
+  }
+}

core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookmarks.kt

@@ -33,6 +33,8 @@ import kotlinx.coroutines.withContext
 import org.kiwix.kiwixmobile.core.CoreApp
 import org.kiwix.kiwixmobile.core.DarkModeConfig
 import org.kiwix.kiwixmobile.core.R
+import org.kiwix.kiwixmobile.core.di.modules.BOOKMARK_LIBRARY
+import org.kiwix.kiwixmobile.core.di.modules.BOOKMARK_MANAGER
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.isCustomApp
 import org.kiwix.kiwixmobile.core.extensions.deleteFile
 import org.kiwix.kiwixmobile.core.extensions.getFavicon
@@ -53,11 +55,12 @@ import org.kiwix.libzim.Archive
 import org.kiwix.libzim.SuggestionSearcher
 import java.io.File
 import javax.inject.Inject
+import javax.inject.Named
 
 class LibkiwixBookmarks @Inject constructor(
-  val library: Library,
-  manager: Manager,
-  val sharedPreferenceUtil: SharedPreferenceUtil,
+  @Named(BOOKMARK_LIBRARY) private val library: Library,
+  @Named(BOOKMARK_MANAGER) private val manager: Manager,
+  private val sharedPreferenceUtil: SharedPreferenceUtil,
   private val bookDao: NewBookDao,
   private val zimReaderContainer: ZimReaderContainer?
 ) : PageDao {
@@ -69,16 +72,14 @@ class LibkiwixBookmarks @Inject constructor(
   private var bookmarkList: List<LibkiwixBookmarkItem> = arrayListOf()
   private var libraryBooksList: List<String> = arrayListOf()
 
-  @Suppress("InjectDispatcher", "TooGenericExceptionCaught")
+  @Suppress("InjectDispatcher")
   private val bookmarkListFlow: MutableStateFlow<List<LibkiwixBookmarkItem>> by lazy {
     MutableStateFlow<List<LibkiwixBookmarkItem>>(emptyList()).also { flow ->
       CoroutineScope(Dispatchers.IO).launch {
-        try {
+        runCatching {
           val bookmarks = getBookmarksList()
           flow.emit(bookmarks)
-        } catch (e: Exception) {
-          e.printStackTrace()
-        }
+        }.onFailure { it.printStackTrace() }
       }
     }
   }

core/src/main/java/org/kiwix/kiwixmobile/core/data/remote/ObjectBoxToLibkiwixMigrator.kt

@@ -24,7 +24,9 @@ import io.objectbox.kotlin.boxFor
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import org.kiwix.kiwixmobile.core.CoreApp
+import org.kiwix.kiwixmobile.core.dao.LibkiwixBookOnDisk
 import org.kiwix.kiwixmobile.core.dao.LibkiwixBookmarks
+import org.kiwix.kiwixmobile.core.dao.entities.BookOnDiskEntity
 import org.kiwix.kiwixmobile.core.dao.entities.BookmarkEntity
 import org.kiwix.kiwixmobile.core.page.bookmark.adapter.LibkiwixBookmarkItem
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
@@ -43,14 +45,44 @@ class ObjectBoxToLibkiwixMigrator {
 
   @Inject
   lateinit var libkiwixBookmarks: LibkiwixBookmarks
+
+  @Inject
+  lateinit var libkiwixBookOnDisk: LibkiwixBookOnDisk
   private val migrationMutex = Mutex()
 
-  suspend fun migrateBookmarksToLibkiwix() {
+  suspend fun migrateObjectBoxDataToLibkiwix() {
     CoreApp.coreComponent.inject(this)
-    migrateBookMarks(boxStore.boxFor())
+    if (!sharedPreferenceUtil.prefIsBookmarksMigrated) {
+      migrateBookMarks(boxStore.boxFor())
+    }
+    if (!sharedPreferenceUtil.prefIsBookOnDiskMigrated) {
+      migrateLocalBooks(boxStore.boxFor())
+    }
     // TODO we will migrate here for other entities
   }
 
+  suspend fun migrateLocalBooks(box: Box<BookOnDiskEntity>) {
+    val bookOnDiskList = box.all
+    migrationMutex.withLock {
+      runCatching {
+        val libkiwixBooks = bookOnDiskList.map {
+          val archive = Archive(it.file.path)
+          Book().apply {
+            update(archive)
+          }
+        }
+        libkiwixBookOnDisk.insert(libkiwixBooks)
+      }.onFailure {
+        Log.e(
+          "MIGRATING_BOOK_ON_DISK",
+          "there is an error while migrating the bookOnDisk \n" +
+            "Original exception is = $it"
+        )
+      }
+    }
+    sharedPreferenceUtil.putPrefBookOnDiskMigrated(true)
+  }
+
   suspend fun migrateBookMarks(box: Box<BookmarkEntity>) {
     val bookMarksList = box.all
     // run migration with mutex to do the migration one by one.

core/src/main/java/org/kiwix/kiwixmobile/core/di/components/CoreComponent.kt

@@ -30,6 +30,7 @@ import org.kiwix.kiwixmobile.core.dao.DownloadRoomDao
 import org.kiwix.kiwixmobile.core.dao.HistoryDao
 import org.kiwix.kiwixmobile.core.dao.HistoryRoomDao
 import org.kiwix.kiwixmobile.core.dao.LibkiwixBookmarks
+import org.kiwix.kiwixmobile.core.dao.LibkiwixBookOnDisk
 import org.kiwix.kiwixmobile.core.dao.NewBookDao
 import org.kiwix.kiwixmobile.core.dao.NewBookmarksDao
 import org.kiwix.kiwixmobile.core.dao.NewLanguagesDao
@@ -99,6 +100,7 @@ interface CoreComponent {
   fun connectivityManager(): ConnectivityManager
   fun objectBoxToLibkiwixMigrator(): ObjectBoxToLibkiwixMigrator
   fun libkiwixBookmarks(): LibkiwixBookmarks
+  fun libkiwixBooks(): LibkiwixBookOnDisk
   fun recentSearchRoomDao(): RecentSearchRoomDao
   fun historyRoomDao(): HistoryRoomDao
   fun webViewHistoryRoomDao(): WebViewHistoryRoomDao

core/src/main/java/org/kiwix/kiwixmobile/core/di/modules/JNIModule.kt

@@ -21,12 +21,14 @@ import android.content.Context
 import dagger.Module
 import dagger.Provides
 import org.kiwix.kiwixmobile.core.dao.LibkiwixBookmarks
+import org.kiwix.kiwixmobile.core.dao.LibkiwixBookOnDisk
 import org.kiwix.kiwixmobile.core.dao.NewBookDao
 import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
 import org.kiwix.libkiwix.JNIKiwix
 import org.kiwix.libkiwix.Library
 import org.kiwix.libkiwix.Manager
+import javax.inject.Named
 import javax.inject.Singleton
 
 @Module
@@ -36,20 +38,47 @@ class JNIModule {
 
   @Provides
   @Singleton
-  fun provideLibrary(): Library = Library()
+  @Named(BOOKMARK_LIBRARY)
+  fun provideBookmarkLibrary(): Library = Library()
 
   @Provides
   @Singleton
-  fun providesManager(library: Library): Manager = Manager(library)
+  @Named(BOOKMARK_MANAGER)
+  fun providesBookmarkManager(@Named(BOOKMARK_LIBRARY) library: Library): Manager =
+    Manager(library)
 
   @Provides
   @Singleton
   fun providesLibkiwixBookmarks(
-    library: Library,
-    manager: Manager,
+    @Named(BOOKMARK_LIBRARY) library: Library,
+    @Named(BOOKMARK_MANAGER) manager: Manager,
     sharedPreferenceUtil: SharedPreferenceUtil,
     bookDao: NewBookDao,
     zimReaderContainer: ZimReaderContainer
   ): LibkiwixBookmarks =
     LibkiwixBookmarks(library, manager, sharedPreferenceUtil, bookDao, zimReaderContainer)
+
+  @Provides
+  @Singleton
+  @Named(LOCAL_BOOKS_LIBRARY)
+  fun provideLocalBooksLibrary(): Library = Library()
+
+  @Provides
+  @Singleton
+  @Named(LOCAL_BOOKS_MANAGER)
+  fun providesLocalBooksManager(@Named(LOCAL_BOOKS_LIBRARY) library: Library): Manager =
+    Manager(library)
+
+  @Provides
+  @Singleton
+  fun providesLibkiwixBooks(
+    @Named(LOCAL_BOOKS_LIBRARY) library: Library,
+    @Named(LOCAL_BOOKS_MANAGER) manager: Manager,
+    sharedPreferenceUtil: SharedPreferenceUtil,
+  ): LibkiwixBookOnDisk = LibkiwixBookOnDisk(library, manager, sharedPreferenceUtil)
 }
+
+const val BOOKMARK_LIBRARY = "bookmarkLibrary"
+const val BOOKMARK_MANAGER = "bookmarkManager"
+const val LOCAL_BOOKS_LIBRARY = "localBooksLibrary"
+const val LOCAL_BOOKS_MANAGER = "localBooksManager"

core/src/main/java/org/kiwix/kiwixmobile/core/entity/LibkiwixBook.kt

@@ -19,6 +19,7 @@
 package org.kiwix.kiwixmobile.core.entity
 
 import org.kiwix.kiwixmobile.core.extensions.getFavicon
+import org.kiwix.kiwixmobile.core.reader.ZimReaderSource
 import org.kiwix.libkiwix.Book
 import java.io.File
 
@@ -43,6 +44,7 @@ data class LibkiwixBook(
   private var _bookName: String? = null,
   private var _favicon: String = "",
   private var _tags: String? = null,
+  private var _path: String? = "",
   var searchMatches: Int = 0,
   var file: File? = null
 ) {
@@ -130,6 +132,15 @@ data class LibkiwixBook(
       _tags = tags
     }
 
+  var path: String?
+    get() = _path ?: nativeBook?.path
+    set(path) {
+      _path = path
+    }
+
+  val zimReaderSource: ZimReaderSource
+    get() = ZimReaderSource(File(path.orEmpty()))
+
   // Two books are equal if their ids match
   override fun equals(other: Any?): Boolean {
     if (other is LibkiwixBook) {

core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt

@@ -121,9 +121,8 @@ abstract class CoreMainActivity : BaseActivity(), WebViewProvider {
     super.onCreate(savedInstanceState)
     if (!BuildConfig.DEBUG) {
       val appContext = applicationContext
-      Thread.setDefaultUncaughtExceptionHandler {
-          paramThread: Thread?,
-          paramThrowable: Throwable? ->
+      Thread.setDefaultUncaughtExceptionHandler { paramThread: Thread?,
+        paramThrowable: Throwable? ->
         val intent = Intent(appContext, ErrorActivity::class.java)
         val extras = Bundle()
         extras.putSerializable(ErrorActivity.EXCEPTION_KEY, paramThrowable)
@@ -137,11 +136,9 @@ abstract class CoreMainActivity : BaseActivity(), WebViewProvider {
     }
 
     setMainActivityToCoreApp()
-    if (!sharedPreferenceUtil.prefIsBookmarksMigrated) {
-      // run the migration on background thread to avoid any UI related issues.
-      CoroutineScope(Dispatchers.IO).launch {
-        objectBoxToLibkiwixMigrator.migrateBookmarksToLibkiwix()
-      }
+    // run the migration on background thread to avoid any UI related issues.
+    CoroutineScope(Dispatchers.IO).launch {
+      objectBoxToLibkiwixMigrator.migrateObjectBoxDataToLibkiwix()
     }
     // run the migration on background thread to avoid any UI related issues.
     CoroutineScope(Dispatchers.IO).launch {

core/src/main/java/org/kiwix/kiwixmobile/core/utils/SharedPreferenceUtil.kt

@@ -114,6 +114,9 @@ class SharedPreferenceUtil @Inject constructor(val context: Context) {
   val prefIsAppDirectoryMigrated: Boolean
     get() = sharedPreferences.getBoolean(PREF_APP_DIRECTORY_TO_PUBLIC_MIGRATED, false)
 
+  val prefIsBookOnDiskMigrated: Boolean
+    get() = sharedPreferences.getBoolean(PREF_BOOK_ON_DISK_MIGRATED, false)
+
   val prefStorage: String
     get() {
       val storage = sharedPreferences.getString(PREF_STORAGE, null)
@@ -163,6 +166,9 @@ class SharedPreferenceUtil @Inject constructor(val context: Context) {
   fun putPrefAppDirectoryMigrated(isMigrated: Boolean) =
     sharedPreferences.edit { putBoolean(PREF_APP_DIRECTORY_TO_PUBLIC_MIGRATED, isMigrated) }
 
+  fun putPrefBookOnDiskMigrated(isMigrated: Boolean) =
+    sharedPreferences.edit { putBoolean(PREF_BOOK_ON_DISK_MIGRATED, isMigrated) }
+
   fun putPrefLanguage(language: String) =
     sharedPreferences.edit { putString(PREF_LANG, language) }
 
@@ -345,6 +351,7 @@ class SharedPreferenceUtil @Inject constructor(val context: Context) {
     const val PREF_HISTORY_MIGRATED = "pref_history_migrated"
     const val PREF_NOTES_MIGRATED = "pref_notes_migrated"
     const val PREF_APP_DIRECTORY_TO_PUBLIC_MIGRATED = "pref_app_directory_to_public_migrated"
+    const val PREF_BOOK_ON_DISK_MIGRATED = "pref_book_on_disk_migrated"
     const val PREF_SHOW_COPY_MOVE_STORAGE_SELECTION_DIALOG = "pref_show_copy_move_storage_dialog"
     private const val PREF_LATER_CLICKED_MILLIS = "pref_later_clicked_millis"
     const val PREF_LAST_DONATION_POPUP_SHOWN_IN_MILLISECONDS =

core/src/main/java/org/kiwix/kiwixmobile/core/zim_manager/fileselect_view/BooksOnDiskListItem.kt

@@ -54,6 +54,10 @@ sealed class BooksOnDiskListItem {
       book.language.convertToLocal()
     }
 
+    @Deprecated(
+      "Now we are using the libkiwix to store and retrieve the local " +
+        "books so this constructor is no longer used."
+    )
     constructor(bookOnDiskEntity: BookOnDiskEntity) : this(
       databaseId = bookOnDiskEntity.id,
       file = bookOnDiskEntity.file,
@@ -70,5 +74,10 @@ sealed class BooksOnDiskListItem {
       book = zimFileReader.toBook(),
       zimReaderSource = zimFileReader.zimReaderSource
     )
+
+    constructor(libkiwixBook: LibkiwixBook) : this(
+      book = libkiwixBook,
+      zimReaderSource = libkiwixBook.zimReaderSource
+    )
   }
 }