Replacing the fetch library with Android's DownloadManager.

README.md

@@ -96,8 +96,6 @@ are interested in our custom apps, they have their own repo
   classes by default.
 - [JUnit5](https://github.com/junit-team/junit5/) - The next generation of JUnit
 - [AssertJ](https://github.com/joel-costigliola/assertj-core) - Fluent assertions for test code
-- [Fetch](https://github.com/tonyofrancis/Fetch) - A customizable file download manager library for
-  Android
 - [ZXing](https://github.com/zxing/zxing) - Barcode scanning library for Java, Android
 
 ## Contributing

app/detekt_baseline.xml

@@ -5,7 +5,7 @@
     <ID>EmptyFunctionBlock:None.kt$None${ }</ID>
     <ID>EmptyFunctionBlock:SimplePageChangeListener.kt$SimplePageChangeListener${ }</ID>
     <ID>LongParameterList:ZimManageViewModel.kt$ZimManageViewModel$( booksOnFileSystem: List&lt;BookOnDisk>, activeDownloads: List&lt;DownloadModel>, allLanguages: List&lt;Language>, libraryNetworkEntity: LibraryNetworkEntity, filter: String, fileSystemState: FileSystemState )</ID>
-    <ID>LongParameterList:ZimManageViewModel.kt$ZimManageViewModel$( private val downloadDao: FetchDownloadDao, private val bookDao: NewBookDao, private val languageDao: NewLanguagesDao, private val storageObserver: StorageObserver, private val kiwixService: KiwixService, private val context: Application, private val connectivityBroadcastReceiver: ConnectivityBroadcastReceiver, private val bookUtils: BookUtils, private val fat32Checker: Fat32Checker, private val defaultLanguageProvider: DefaultLanguageProvider, private val dataSource: DataSource, private val connectivityManager: ConnectivityManager, private val sharedPreferenceUtil: SharedPreferenceUtil )</ID>
+    <ID>LongParameterList:ZimManageViewModel.kt$ZimManageViewModel$( private val downloadDao: DownloadRoomDao, private val bookDao: NewBookDao, private val languageDao: NewLanguagesDao, private val storageObserver: StorageObserver, private val kiwixService: KiwixService, private val context: Application, private val connectivityBroadcastReceiver: ConnectivityBroadcastReceiver, private val bookUtils: BookUtils, private val fat32Checker: Fat32Checker, private val defaultLanguageProvider: DefaultLanguageProvider, private val dataSource: DataSource, private val connectivityManager: ConnectivityManager, private val sharedPreferenceUtil: SharedPreferenceUtil )</ID>
     <ID>MagicNumber:LibraryListItem.kt$LibraryListItem.LibraryDownloadItem$1000L</ID>
     <ID>MagicNumber:PeerGroupHandshake.kt$PeerGroupHandshake$15000</ID>
     <ID>MagicNumber:ShareFiles.kt$ShareFiles$24</ID>

app/src/androidTest/java/org/kiwix/kiwixmobile/download/DownloadRobot.kt

@@ -119,8 +119,14 @@ class DownloadRobot : BaseRobot() {
   }
 
   fun assertDownloadPaused() {
-    pauseForBetterTestPerformance()
-    onView(withText(org.kiwix.kiwixmobile.core.R.string.paused_state)).check(matches(isDisplayed()))
+    testFlakyView({
+      pauseForBetterTestPerformance()
+      onView(
+        withText(
+          org.kiwix.kiwixmobile.core.R.string.paused_state
+        )
+      ).check(matches(isDisplayed()))
+    })
   }
 
   fun resumeDownload() {

app/src/main/assets/credits.html

@@ -77,11 +77,6 @@ <h3>Apache</h3>
         <br/>
         Copyright 2013 Evan Tatarka
     </li>
-    <li>
-        <b>Fetch</b>
-        <br/>
-        Copyright (C) 2017 Tonyo Francis
-    </li>
     <li>
         <b>ObjectBox</b>
         <br/>

app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/WifiDirectManager.kt

@@ -19,6 +19,7 @@ package org.kiwix.kiwixmobile.localFileTransfer
 
 import android.content.BroadcastReceiver
 import android.content.Context
+import android.content.Context.RECEIVER_NOT_EXPORTED
 import android.content.IntentFilter
 import android.net.Uri
 import android.net.wifi.WpsInfo
@@ -32,10 +33,10 @@ import android.net.wifi.p2p.WifiP2pManager.Channel
 import android.net.wifi.p2p.WifiP2pManager.ChannelListener
 import android.net.wifi.p2p.WifiP2pManager.ConnectionInfoListener
 import android.net.wifi.p2p.WifiP2pManager.PeerListListener
+import android.os.Build
 import android.os.Build.VERSION
 import android.os.Build.VERSION_CODES
 import android.os.Looper.getMainLooper
-import org.kiwix.kiwixmobile.core.utils.files.Log
 import android.widget.Toast
 import androidx.lifecycle.LifecycleCoroutineScope
 import kotlinx.coroutines.launch
@@ -44,6 +45,7 @@ import org.kiwix.kiwixmobile.core.extensions.toast
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
 import org.kiwix.kiwixmobile.core.utils.dialog.AlertDialogShower
 import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog.FileTransferConfirmation
+import org.kiwix.kiwixmobile.core.utils.files.Log
 import org.kiwix.kiwixmobile.localFileTransfer.FileItem.FileStatus
 import org.kiwix.kiwixmobile.localFileTransfer.KiwixWifiP2pBroadcastReceiver.P2pEventListener
 import java.io.IOException
@@ -105,7 +107,11 @@ class WifiDirectManager @Inject constructor(
       addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION)
       addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION)
     }
-    context.registerReceiver(receiver, intentFilter)
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+      context.registerReceiver(receiver, intentFilter, RECEIVER_NOT_EXPORTED)
+    } else {
+      context.registerReceiver(receiver, intentFilter)
+    }
   }
 
   private fun unregisterWifiDirectBroadcastReceiver() = context.unregisterReceiver(receiver)

app/src/main/java/org/kiwix/kiwixmobile/main/KiwixMainActivity.kt

@@ -38,10 +38,8 @@ import org.kiwix.kiwixmobile.BuildConfig
 import org.kiwix.kiwixmobile.R
 import org.kiwix.kiwixmobile.core.base.FragmentActivityExtensions
 import org.kiwix.kiwixmobile.core.dao.NewBookDao
-import org.kiwix.kiwixmobile.core.downloader.fetch.DOWNLOAD_NOTIFICATION_TITLE
+import org.kiwix.kiwixmobile.core.downloader.downloadManager.DOWNLOAD_NOTIFICATION_TITLE
 import org.kiwix.kiwixmobile.core.main.CoreMainActivity
-import org.kiwix.kiwixmobile.core.utils.EXTERNAL_SELECT_POSITION
-import org.kiwix.kiwixmobile.core.utils.INTERNAL_SELECT_POSITION
 import org.kiwix.kiwixmobile.core.utils.LanguageUtils.Companion.handleLocaleChange
 import org.kiwix.kiwixmobile.databinding.ActivityKiwixMainBinding
 import org.kiwix.kiwixmobile.kiwixActivityComponent
@@ -122,16 +120,11 @@ class KiwixMainActivity : CoreMainActivity() {
 
   private fun migrateInternalToPublicAppDirectory() {
     if (!sharedPreferenceUtil.prefIsAppDirectoryMigrated) {
-      val writableStoragePaths = StorageDeviceUtils.getWritableStorage(this)
-      val targetStoragePath = when (sharedPreferenceUtil.storagePosition) {
-        INTERNAL_SELECT_POSITION ->
-          sharedPreferenceUtil.getPublicDirectoryPath(writableStoragePaths[0].name)
-
-        EXTERNAL_SELECT_POSITION -> writableStoragePaths.getOrNull(1)?.name
-        else -> null
-      }
-      targetStoragePath?.let {
-        sharedPreferenceUtil.putPrefStorage(it)
+      val storagePath = StorageDeviceUtils.getWritableStorage(this)
+        .getOrNull(sharedPreferenceUtil.storagePosition)
+        ?.name
+      storagePath?.let {
+        sharedPreferenceUtil.putPrefStorage(sharedPreferenceUtil.getPublicDirectoryPath(it))
         sharedPreferenceUtil.putPrefAppDirectoryMigrated(true)
       }
     }

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/OnlineLibraryFragment.kt

@@ -22,7 +22,6 @@
 import android.Manifest.permission.POST_NOTIFICATIONS
 import android.Manifest.permission.WRITE_EXTERNAL_STORAGE
 import android.annotation.SuppressLint
-import android.app.Activity.RESULT_OK
 import android.content.Intent
 import android.content.pm.PackageManager.PERMISSION_GRANTED
 import android.net.ConnectivityManager
@@ -36,7 +35,6 @@
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.SearchView
 import androidx.appcompat.widget.Toolbar
@@ -50,7 +48,6 @@
 import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import com.tonyodev.fetch2.Status
 import eu.mhutti1.utils.storage.StorageDevice
 import eu.mhutti1.utils.storage.StorageSelectDialog
 import org.kiwix.kiwixmobile.R
@@ -59,6 +56,7 @@
 import org.kiwix.kiwixmobile.core.base.BaseFragment
 import org.kiwix.kiwixmobile.core.base.FragmentActivityExtensions
 import org.kiwix.kiwixmobile.core.downloader.Downloader
+import org.kiwix.kiwixmobile.core.downloader.downloadManager.Status
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.hasNotificationPermission
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.isManageExternalStoragePermissionGranted
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.navigate
@@ -85,9 +83,7 @@
 import org.kiwix.kiwixmobile.core.utils.dialog.AlertDialogShower
 import org.kiwix.kiwixmobile.core.utils.dialog.DialogShower
 import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog
-import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog.SelectFolder
 import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog.YesNoDialog.WifiOnly
-import org.kiwix.kiwixmobile.core.utils.files.FileUtils.getPathFromUri
 import org.kiwix.kiwixmobile.databinding.FragmentDestinationDownloadBinding
 import org.kiwix.kiwixmobile.zimManager.NetworkState
 import org.kiwix.kiwixmobile.zimManager.ZimManageViewModel
@@ -136,7 +132,7 @@
           context?.let { context ->
             downloader.pauseResumeDownload(
               it.downloadId,
-              it.downloadState.toReadableState(context) == getString(R.string.paused_state)
+              it.downloadState.toReadableState(context).contains(getString(R.string.paused_state))
             )
           }
         }
@@ -380,62 +376,16 @@
   private fun storeDeviceInPreferences(
     storageDevice: StorageDevice
   ) {
-    if (storageDevice.isInternal) {
-      sharedPreferenceUtil.putPrefStorage(
-        sharedPreferenceUtil.getPublicDirectoryPath(storageDevice.name)
-      )
-      sharedPreferenceUtil.putStoragePosition(INTERNAL_SELECT_POSITION)
-      clickOnBookItem()
-    } else {
-      if (sharedPreferenceUtil.isPlayStoreBuild) {
-        setExternalStoragePath(storageDevice)
-      } else {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R &&
-          Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU
-        ) {
-          val view = LayoutInflater.from(activity).inflate(R.layout.select_folder_dialog, null)
-          dialogShower.show(SelectFolder { view }, ::selectFolder)
-        } else {
-          setExternalStoragePath(storageDevice)
-        }
-      }
-    }
-  }
-
-  private fun setExternalStoragePath(storageDevice: StorageDevice) {
-    sharedPreferenceUtil.putPrefStorage(storageDevice.name)
-    sharedPreferenceUtil.putStoragePosition(EXTERNAL_SELECT_POSITION)
-    clickOnBookItem()
-  }
-
-  private fun selectFolder() {
-    val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
-    intent.addFlags(
-      Intent.FLAG_GRANT_READ_URI_PERMISSION
-        or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
-        or Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
-        or Intent.FLAG_GRANT_PREFIX_URI_PERMISSION
+    sharedPreferenceUtil.putPrefStorage(
+      sharedPreferenceUtil.getPublicDirectoryPath(storageDevice.name)
     )
-    selectFolderLauncher.launch(intent)
+    sharedPreferenceUtil.putStoragePosition(
+      if (storageDevice.isInternal) INTERNAL_SELECT_POSITION
+      else EXTERNAL_SELECT_POSITION
+    )
+    clickOnBookItem()
   }
 
-  private val selectFolderLauncher =
-    registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
-      if (result.resultCode == RESULT_OK) {
-        result.data?.let { intent ->
-          getPathFromUri(requireActivity(), intent)?.let(sharedPreferenceUtil::putPrefStorage)
-          sharedPreferenceUtil.putStoragePosition(EXTERNAL_SELECT_POSITION)
-          clickOnBookItem()
-        } ?: run {
-          activity.toast(
-            resources
-              .getString(R.string.system_unable_to_grant_permission_message),
-            Toast.LENGTH_SHORT
-          )
-        }
-      }
-    }
-
   private fun requestNotificationPermission() {
     if (!shouldShowRationale(POST_NOTIFICATIONS)) {
       requireActivity().requestNotificationPermission()

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

@@ -37,7 +37,7 @@ import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.StorageObserver
 import org.kiwix.kiwixmobile.core.base.SideEffect
 import org.kiwix.kiwixmobile.core.compat.CompatHelper.Companion.isWifi
-import org.kiwix.kiwixmobile.core.dao.FetchDownloadDao
+import org.kiwix.kiwixmobile.core.dao.DownloadRoomDao
 import org.kiwix.kiwixmobile.core.dao.NewBookDao
 import org.kiwix.kiwixmobile.core.dao.NewLanguagesDao
 import org.kiwix.kiwixmobile.core.data.DataSource
@@ -88,7 +88,7 @@ const val MAX_PROGRESS = 100
 private const val TAG_RX_JAVA_DEFAULT_ERROR_HANDLER = "RxJavaDefaultErrorHandler"
 
 class ZimManageViewModel @Inject constructor(
-  private val downloadDao: FetchDownloadDao,
+  private val downloadDao: DownloadRoomDao,
   private val bookDao: NewBookDao,
   private val languageDao: NewLanguagesDao,
   private val storageObserver: StorageObserver,
@@ -334,10 +334,12 @@ class ZimManageViewModel @Inject constructor(
       fromLocalesWithNetworkMatchesSetActiveBy(
         networkLanguageCounts(booksFromNetwork), defaultLanguage()
       )
+
     booksFromNetwork.isNotEmpty() && allLanguages.isNotEmpty() ->
       fromLocalesWithNetworkMatchesSetActiveBy(
         networkLanguageCounts(booksFromNetwork), allLanguages
       )
+
     else -> throw RuntimeException("Impossible state")
   }
 

app/src/main/java/org/kiwix/kiwixmobile/zimManager/libraryView/AvailableSpaceCalculator.kt

@@ -23,15 +23,15 @@ import eu.mhutti1.utils.storage.Kb
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.Disposable
 import io.reactivex.schedulers.Schedulers
-import org.kiwix.kiwixmobile.core.dao.FetchDownloadDao
+import org.kiwix.kiwixmobile.core.dao.DownloadRoomDao
 import org.kiwix.kiwixmobile.core.downloader.model.DownloadModel
 import org.kiwix.kiwixmobile.core.entity.LibraryNetworkEntity.Book
 import org.kiwix.kiwixmobile.core.settings.StorageCalculator
 import org.kiwix.kiwixmobile.zimManager.libraryView.adapter.LibraryListItem
 import javax.inject.Inject
 
 class AvailableSpaceCalculator @Inject constructor(
-  private val downloadDao: FetchDownloadDao,
+  private val downloadRoomDao: DownloadRoomDao,
   private val storageCalculator: StorageCalculator
 ) {
   private var availableSpaceCalculatorDisposable: Disposable? = null
@@ -40,7 +40,7 @@ class AvailableSpaceCalculator @Inject constructor(
     successAction: (LibraryListItem.BookItem) -> Unit,
     failureAction: (String) -> Unit
   ) {
-    availableSpaceCalculatorDisposable = downloadDao.allDownloads()
+    availableSpaceCalculatorDisposable = downloadRoomDao.allDownloads()
       .map { it.map(DownloadModel::bytesRemaining).sum() }
       .map { bytesToBeDownloaded -> storageCalculator.availableBytes() - bytesToBeDownloaded }
       .subscribeOn(Schedulers.io())

app/src/main/java/org/kiwix/kiwixmobile/zimManager/libraryView/adapter/LibraryListItem.kt

@@ -19,7 +19,7 @@
 package org.kiwix.kiwixmobile.zimManager.libraryView.adapter
 
 import androidx.annotation.StringRes
-import com.tonyodev.fetch2.Status
+import org.kiwix.kiwixmobile.core.downloader.downloadManager.Status
 import org.kiwix.kiwixmobile.core.downloader.model.Base64String
 import org.kiwix.kiwixmobile.core.downloader.model.DownloadModel
 import org.kiwix.kiwixmobile.core.downloader.model.DownloadState

app/src/main/java/org/kiwix/kiwixmobile/zimManager/libraryView/adapter/LibraryViewHolder.kt

@@ -19,10 +19,12 @@
 package org.kiwix.kiwixmobile.zimManager.libraryView.adapter
 
 import android.view.View
-import com.tonyodev.fetch2.Status
 import org.kiwix.kiwixmobile.R
 import org.kiwix.kiwixmobile.core.base.adapter.BaseViewHolder
+import org.kiwix.kiwixmobile.core.downloader.downloadManager.Error
+import org.kiwix.kiwixmobile.core.downloader.downloadManager.Status
 import org.kiwix.kiwixmobile.core.downloader.model.Base64String
+import org.kiwix.kiwixmobile.core.downloader.model.DownloadState
 import org.kiwix.kiwixmobile.core.extensions.setBitmap
 import org.kiwix.kiwixmobile.core.extensions.setImageDrawableCompat
 import org.kiwix.kiwixmobile.core.extensions.setTextAndVisibility
@@ -97,6 +99,7 @@
   ) :
     LibraryViewHolder<LibraryDownloadItem>(itemDownloadBinding.root) {
 
+    @Suppress("MagicNumber")
     override fun bind(item: LibraryDownloadItem) {
       itemDownloadBinding.libraryDownloadFavicon.setBitmap(item.favIcon)
       itemDownloadBinding.libraryDownloadTitle.text = item.title
@@ -118,18 +121,44 @@
       itemDownloadBinding.downloadState.text =
         item.downloadState.toReadableState(containerView.context).also {
           val pauseResumeIconId =
-            if (it == itemDownloadBinding.root.context.getString(R.string.paused_state)) {
+            if (it.contains(itemDownloadBinding.root.context.getString(R.string.paused_state))) {
               R.drawable.ic_play_24dp
             } else {
               R.drawable.ic_pause_24dp
             }
-          itemDownloadBinding.pauseResume.setImageDrawableCompat(pauseResumeIconId)
+          itemDownloadBinding.pauseResume.apply {
+            setImageDrawableCompat(pauseResumeIconId)
+            if (shouldEnablePauseResumeButton(item.downloadState)) {
+              isEnabled = true
+              alpha = 1f
+            } else {
+              isEnabled = false
+              alpha = 0.5f
+            }
+          }
         }
       if (item.currentDownloadState == Status.FAILED) {
         clickAction.invoke(item)
       }
       itemDownloadBinding.eta.text = item.readableEta
     }
+
+    private fun shouldEnablePauseResumeButton(
+      downloadState: DownloadState
+    ): Boolean =
+      when (downloadState) {
+        is DownloadState.Failed -> false
+        is DownloadState.Paused -> shouldEnablePauseResumeButtonForPauseReason(downloadState.reason)
+        else -> true
+      }
+
+    /**
+     * Disable the pause button when the DownloadManager is waiting for
+     * Wi-Fi or network connection. This prevents the user from trying
+     * to resume the download, as it will not work without a connection.
+     */
+    private fun shouldEnablePauseResumeButtonForPauseReason(reason: Error?): Boolean =
+      reason !in listOf(Error.QUEUED_FOR_WIFI, Error.WAITING_FOR_NETWORK)
   }
 
   class LibraryDividerViewHolder(private val libraryDividerBinding: LibraryDividerBinding) :