Merge pull request #3738 from kiwix/Fix#3737

Fixed: Some EPUB files are not downloading.

app/src/androidTest/java/org/kiwix/kiwixmobile/utils/UnsupportedMimeTypeHandlerTest.kt

@@ -0,0 +1,201 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2024 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.utils
+
+import android.app.Activity
+import android.webkit.WebResourceResponse
+import android.widget.Toast
+import io.mockk.every
+import io.mockk.justRun
+import io.mockk.mockk
+import io.mockk.mockkStatic
+import io.mockk.slot
+import io.mockk.verify
+import org.junit.Before
+import org.junit.jupiter.api.Test
+import org.kiwix.kiwixmobile.core.R
+import org.kiwix.kiwixmobile.core.extensions.toast
+import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
+import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
+import org.kiwix.kiwixmobile.core.utils.dialog.AlertDialogShower
+import org.kiwix.kiwixmobile.core.utils.dialog.UnsupportedMimeTypeHandler
+import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog
+import java.io.File
+import java.io.InputStream
+
+class UnsupportedMimeTypeHandlerTest {
+  private val demoUrl = "content://demoPdf.pdf"
+  private val demoFileName = "demoPdf.pdf"
+  private val sharedPreferenceUtil: SharedPreferenceUtil = mockk()
+  private val zimReaderContainer: ZimReaderContainer = mockk()
+  private val alertDialogShower: AlertDialogShower = mockk(relaxed = true)
+  private val savedFile: File = mockk(relaxed = true)
+  private val activity: Activity = mockk()
+  private val webResourceResponse: WebResourceResponse = mockk()
+  private val inputStream: InputStream = mockk()
+  private val unsupportedMimeTypeHandler = UnsupportedMimeTypeHandler(
+    activity,
+    sharedPreferenceUtil,
+    alertDialogShower,
+    zimReaderContainer
+  )
+
+  @Before
+  fun before() {
+    every { savedFile.name } returns demoFileName
+    every { sharedPreferenceUtil.isPlayStoreBuildWithAndroid11OrAbove() } returns true
+    every { inputStream.read(array()) } returns 1024
+    every { webResourceResponse.data } returns inputStream
+    every {
+      zimReaderContainer.load(
+        demoUrl,
+        emptyMap()
+      )
+    } returns webResourceResponse
+    every { activity.packageManager } returns mockk()
+    every { activity.packageName } returns "org.kiwix.kiwixmobile"
+    every {
+      activity.getString(
+        R.string.save_media_saved,
+        demoFileName
+      )
+    } returns "Saved media as $demoFileName to Downloads/org.kiwix…/"
+    every { savedFile.path } returns "Emulated/0/Downloads/$demoFileName"
+    every { savedFile.exists() } returns true
+    unsupportedMimeTypeHandler.intent = mockk()
+    every { unsupportedMimeTypeHandler.intent.setDataAndType(any(), any()) } returns mockk()
+    every { unsupportedMimeTypeHandler.intent.setFlags(any()) } returns mockk()
+    every { unsupportedMimeTypeHandler.intent.addFlags(any()) } returns mockk()
+  }
+
+  @Test
+  fun testOpeningFileInExternalReaderApplication() {
+    every {
+      unsupportedMimeTypeHandler.intent.resolveActivity(activity.packageManager)
+    } returns mockk()
+    every { activity.startActivity(unsupportedMimeTypeHandler.intent) } returns mockk()
+    val lambdaSlot = slot<() -> Unit>()
+    unsupportedMimeTypeHandler.showSaveOrOpenUnsupportedFilesDialog(demoUrl, "application/pdf")
+    verify {
+      alertDialogShower.show(
+        KiwixDialog.SaveOrOpenUnsupportedFiles,
+        capture(lambdaSlot),
+        any(),
+        any()
+      )
+    }
+    lambdaSlot.captured.invoke()
+    verify {
+      activity.startActivity(unsupportedMimeTypeHandler.intent)
+    }
+  }
+
+  @Test
+  fun testOpeningFileWhenNoReaderApplicationInstalled() {
+    every {
+      unsupportedMimeTypeHandler.intent.resolveActivity(activity.packageManager)
+    } returns null
+    mockkStatic(Toast::class)
+    justRun {
+      Toast.makeText(activity, R.string.no_reader_application_installed, Toast.LENGTH_LONG).show()
+    }
+    val lambdaSlot = slot<() -> Unit>()
+    unsupportedMimeTypeHandler.showSaveOrOpenUnsupportedFilesDialog(demoUrl, "application/pdf")
+    verify {
+      alertDialogShower.show(
+        KiwixDialog.SaveOrOpenUnsupportedFiles,
+        capture(lambdaSlot),
+        any(),
+        any()
+      )
+    }
+    lambdaSlot.captured.invoke()
+    verify { activity.toast(R.string.no_reader_application_installed) }
+  }
+
+  @Test
+  fun testFileSavedSuccessfully() {
+    val toastMessage = activity.getString(R.string.save_media_saved, savedFile.name)
+    mockkStatic(Toast::class)
+    justRun {
+      Toast.makeText(
+        activity,
+        toastMessage,
+        Toast.LENGTH_LONG
+      ).show()
+    }
+    val lambdaSlot = slot<() -> Unit>()
+    unsupportedMimeTypeHandler.showSaveOrOpenUnsupportedFilesDialog(
+      demoUrl,
+      "application/pdf"
+    )
+    verify {
+      alertDialogShower.show(
+        KiwixDialog.SaveOrOpenUnsupportedFiles,
+        any(),
+        capture(lambdaSlot),
+        any()
+      )
+    }
+    lambdaSlot.captured.invoke()
+    verify { activity.toast(toastMessage) }
+  }
+
+  @Test
+  fun testUserClicksOnNoThanksButton() {
+    val lambdaSlot = slot<() -> Unit>()
+    unsupportedMimeTypeHandler.showSaveOrOpenUnsupportedFilesDialog(demoUrl, "application/pdf")
+    verify {
+      alertDialogShower.show(
+        KiwixDialog.SaveOrOpenUnsupportedFiles,
+        any(),
+        any(),
+        capture(lambdaSlot)
+      )
+    }
+    lambdaSlot.captured.invoke()
+    verify(exactly = 0) { activity.startActivity(any()) }
+  }
+
+  @Test
+  fun testIfSavingFailed() {
+    val downloadOrOpenEpubAndPdfHandler = UnsupportedMimeTypeHandler(
+      activity,
+      sharedPreferenceUtil,
+      alertDialogShower,
+      zimReaderContainer
+    )
+    mockkStatic(Toast::class)
+    justRun {
+      Toast.makeText(activity, R.string.save_media_error, Toast.LENGTH_LONG).show()
+    }
+    val lambdaSlot = slot<() -> Unit>()
+    downloadOrOpenEpubAndPdfHandler.showSaveOrOpenUnsupportedFilesDialog(null, "application/pdf")
+    verify {
+      alertDialogShower.show(
+        KiwixDialog.SaveOrOpenUnsupportedFiles,
+        any(),
+        capture(lambdaSlot),
+        any()
+      )
+    }
+    lambdaSlot.captured.invoke()
+    verify { activity.toast(R.string.save_media_error) }
+  }
+}

app/src/androidTest/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.kt

@@ -260,6 +260,14 @@ class FileUtilsInstrumentationTest {
       DummyUrlData(
         "https://kiwix.org/contributors/images/wikipedia",
         null
+      ),
+      DummyUrlData(
+        "https://kiwix.org/contributors/images/wikipedia:hello.epub",
+        "wikipediahello.epub"
+      ),
+      DummyUrlData(
+        "https://kiwix.org/contributors/Y Gododin: A Poem of the Battle: of Cattraeth.9842.epub",
+        "Y Gododin A Poem of the Battle of Cattraeth.9842.epub"
       )
     )
     dummyUrlArray.forEach {

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/reader/KiwixReaderFragment.kt

@@ -243,7 +243,7 @@ class KiwixReaderFragment : CoreReaderFragment() {
   override fun createWebView(attrs: AttributeSet?): ToolbarScrollingKiwixWebView {
     return ToolbarScrollingKiwixWebView(
       requireContext(), this, attrs!!, activityMainRoot as ViewGroup, videoView!!,
-      CoreWebViewClient(this, zimReaderContainer!!, sharedPreferenceUtil!!),
+      CoreWebViewClient(this, zimReaderContainer!!),
       toolbarContainer!!, bottomToolbar!!, sharedPreferenceUtil = sharedPreferenceUtil!!,
       parentNavigationBar = requireActivity().findViewById(R.id.bottom_nav_view)
     )

core/src/main/AndroidManifest.xml

@@ -39,6 +39,12 @@
       <category android:name="android.intent.category.BROWSABLE" />
       <data android:scheme="http" />
     </intent>
+    <!-- To open PDF files in external application -->
+    <intent>
+      <action android:name="android.intent.action.VIEW" />
+      <data android:mimeType="application/pdf" />
+    </intent>
+    <!-- To open EPUB files in external application -->
     <intent>
       <action android:name="android.intent.action.VIEW" />
       <data android:mimeType="application/pdf" />

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

@@ -156,6 +156,7 @@ import org.kiwix.kiwixmobile.core.utils.TAG_FILE_SEARCHED_NEW_TAB
 import org.kiwix.kiwixmobile.core.utils.TAG_KIWIX
 import org.kiwix.kiwixmobile.core.utils.UpdateUtils.reformatProviderUrl
 import org.kiwix.kiwixmobile.core.utils.dialog.DialogShower
+import org.kiwix.kiwixmobile.core.utils.dialog.UnsupportedMimeTypeHandler
 import org.kiwix.kiwixmobile.core.utils.dialog.KiwixDialog
 import org.kiwix.kiwixmobile.core.utils.files.FileUtils.deleteCachedFiles
 import org.kiwix.kiwixmobile.core.utils.files.FileUtils.readFile
@@ -321,6 +322,10 @@ abstract class CoreReaderFragment :
   @JvmField
   @Inject
   var externalLinkOpener: ExternalLinkOpener? = null
+
+  @JvmField
+  @Inject
+  var unsupportedMimeTypeHandler: UnsupportedMimeTypeHandler? = null
   private var hideBackToTopTimer: CountDownTimer? = null
   private var documentSections: MutableList<DocumentSection>? = null
   private var isBackToTopEnabled = false
@@ -1214,7 +1219,7 @@ abstract class CoreReaderFragment :
     return if (activityMainRoot != null) {
       ToolbarScrollingKiwixWebView(
         requireActivity(), this, attrs!!, (activityMainRoot as ViewGroup?)!!, videoView!!,
-        CoreWebViewClient(this, zimReaderContainer!!, sharedPreferenceUtil!!),
+        CoreWebViewClient(this, zimReaderContainer!!),
         toolbarContainer!!, bottomToolbar!!,
         sharedPreferenceUtil!!
       )
@@ -1542,6 +1547,10 @@ abstract class CoreReaderFragment :
     externalLinkOpener?.openExternalUrl(intent)
   }
 
+  override fun showSaveOrOpenUnsupportedFilesDialog(url: String, documentType: String?) {
+    unsupportedMimeTypeHandler?.showSaveOrOpenUnsupportedFilesDialog(url, documentType)
+  }
+
   protected fun openZimFile(
     file: File?,
     isCustomApp: Boolean = false,

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

@@ -17,7 +17,6 @@
  */
 package org.kiwix.kiwixmobile.core.main
 
-import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import org.kiwix.kiwixmobile.core.utils.files.Log
@@ -27,18 +26,14 @@ import android.webkit.WebResourceRequest
 import android.webkit.WebResourceResponse
 import android.webkit.WebView
 import android.webkit.WebViewClient
-import androidx.core.content.FileProvider
 import org.kiwix.kiwixmobile.core.CoreApp.Companion.instance
 import org.kiwix.kiwixmobile.core.reader.ZimFileReader
 import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
-import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
 import org.kiwix.kiwixmobile.core.utils.TAG_KIWIX
-import org.kiwix.kiwixmobile.core.utils.files.FileUtils.downloadFileFromUrl
 
 open class CoreWebViewClient(
   protected val callback: WebViewCallback,
-  protected val zimReaderContainer: ZimReaderContainer,
+  protected val zimReaderContainer: ZimReaderContainer
-  private val sharedPreferenceUtil: SharedPreferenceUtil
 ) : WebViewClient() {
   private var urlWithAnchor: String? = null
 
@@ -49,14 +44,14 @@ open class CoreWebViewClient(
     url = convertLegacyUrl(url)
     urlWithAnchor = if (url.contains("#")) url else null
     if (zimReaderContainer.isRedirect(url)) {
-      if (handleEpubAndPdf(url)) {
+      if (handleUnsupportedFiles(url)) {
         return true
       }
       view.loadUrl(zimReaderContainer.getRedirect(url))
       return true
     }
     if (url.startsWith(ZimFileReader.CONTENT_PREFIX)) {
-      return handleEpubAndPdf(url)
+      return handleUnsupportedFiles(url)
     }
     if (url.startsWith("javascript:")) {
       // Allow javascript for HTML functions and code execution (EX: night mode)
@@ -82,29 +77,10 @@ open class CoreWebViewClient(
   }
 
   @Suppress("NestedBlockDepth")
-  private fun handleEpubAndPdf(url: String): Boolean {
+  private fun handleUnsupportedFiles(url: String): Boolean {
     val extension = MimeTypeMap.getFileExtensionFromUrl(url)
     if (DOCUMENT_TYPES.containsKey(extension)) {
-      downloadFileFromUrl(
+      callback.showSaveOrOpenUnsupportedFilesDialog(url, DOCUMENT_TYPES[extension])
-        url,
-        null,
-        zimReaderContainer,
-        sharedPreferenceUtil
-      )?.let {
-        if (it.exists()) {
-          val context: Context = instance
-          val uri = FileProvider.getUriForFile(
-            context,
-            context.packageName + ".fileprovider", it
-          )
-          val intent = Intent(Intent.ACTION_VIEW).apply {
-            setDataAndType(uri, DOCUMENT_TYPES[extension])
-            flags = Intent.FLAG_ACTIVITY_NO_HISTORY
-            addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
-          }
-          callback.openExternalUrl(intent)
-        }
-      }
       return true
     }
     return false

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

@@ -25,6 +25,7 @@ interface WebViewCallback {
   fun webViewUrlFinishedLoading()
   fun webViewFailedLoading(failingUrl: String)
   fun openExternalUrl(intent: Intent)
+  fun showSaveOrOpenUnsupportedFilesDialog(url: String, documentType: String?)
   fun webViewProgressChanged(progress: Int, webView: WebView)
   fun webViewTitleUpdated(title: String)
   fun webViewPageChanged(page: Int, maxPages: Int)

core/src/main/java/org/kiwix/kiwixmobile/core/utils/dialog/KiwixDialog.kt

@@ -108,6 +108,14 @@ sealed class KiwixDialog(
     cancelable = false
   )
 
+  object SaveOrOpenUnsupportedFiles : KiwixDialog(
+    R.string.save_or_open_unsupported_files_dialog_title,
+    R.string.save_or_open_unsupported_files_dialog_message,
+    R.string.open,
+    R.string.save,
+    neutralMessage = R.string.no_thanks
+  )
+
   data class ShowHotspotDetails(override val args: List<Any>) :
     KiwixDialog(
       R.string.hotspot_turned_on,

core/src/main/java/org/kiwix/kiwixmobile/core/utils/dialog/UnsupportedMimeTypeHandler.kt

@@ -0,0 +1,88 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2024 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.utils.dialog
+
+import android.app.Activity
+import android.content.Intent
+import android.util.Log
+import androidx.core.content.FileProvider
+import org.kiwix.kiwixmobile.core.R
+import org.kiwix.kiwixmobile.core.extensions.toast
+import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
+import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
+import org.kiwix.kiwixmobile.core.utils.files.FileUtils.downloadFileFromUrl
+import java.io.File
+import javax.inject.Inject
+
+class UnsupportedMimeTypeHandler @Inject constructor(
+  private val activity: Activity,
+  private val sharedPreferenceUtil: SharedPreferenceUtil,
+  private val alertDialogShower: AlertDialogShower,
+  private val zimReaderContainer: ZimReaderContainer
+) {
+  var intent: Intent = Intent(Intent.ACTION_VIEW)
+
+  fun showSaveOrOpenUnsupportedFilesDialog(url: String?, documentType: String?) {
+    alertDialogShower.show(
+      KiwixDialog.SaveOrOpenUnsupportedFiles,
+      { openOrSaveFile(url, documentType, true) },
+      { openOrSaveFile(url, documentType, false) },
+      { }
+    )
+  }
+
+  private fun openOrSaveFile(url: String?, documentType: String?, openFile: Boolean) {
+    downloadFileFromUrl(
+      url,
+      null,
+      zimReaderContainer,
+      sharedPreferenceUtil
+    )?.let { savedFile ->
+      if (openFile) {
+        openFile(savedFile, documentType)
+      } else {
+        activity.toast(activity.getString(R.string.save_media_saved, savedFile.name)).also {
+          Log.e("DownloadOrOpenEpubAndPdf", "File downloaded at = ${savedFile.path}")
+        }
+      }
+    } ?: run {
+      activity.toast(R.string.save_media_error)
+    }
+  }
+
+  private fun openFile(savedFile: File, documentType: String?) {
+    if (savedFile.exists()) {
+      val uri = FileProvider.getUriForFile(
+        activity,
+        "${activity.packageName}.fileprovider",
+        savedFile
+      )
+      intent.apply {
+        setDataAndType(uri, documentType)
+        flags = Intent.FLAG_ACTIVITY_NO_HISTORY
+        addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+      }
+      if (intent.resolveActivity(activity.packageManager) != null) {
+        activity.startActivity(intent)
+      } else {
+        activity.toast(R.string.no_reader_application_installed)
+      }
+    }
+  }
+}

core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt

@@ -410,12 +410,15 @@ object FileUtils {
 
    * We are placing a condition here for if the file name does not have a .bin extension,
      then it returns the original file name.
+   * Remove colon if any contains in the fileName since most of the fileSystem
+     will not allow to create file which contains colon in it.
+     see https://github.com/kiwix/kiwix-android/issues/3737
    */
   fun getDecodedFileName(url: String?): String? {
     var fileName: String? = null
     val decodedFileName = URLUtil.guessFileName(url, null, null)
     if (!decodedFileName.endsWith(".bin")) {
-      fileName = decodedFileName
+      fileName = decodedFileName.replace(":", "")
     }
     return fileName
   }
@@ -444,17 +447,8 @@ object FileUtils {
         )
       if (!root.isFileExist()) root.mkdir()
     }
-    if (File(root, fileName).isFileExist()) return File(root, fileName)
+    val fileToSave = File(root, fileName)
-    val fileToSave = sequence {
+    if (fileToSave.isFileExist()) return fileToSave
-      yield(File(root, fileName))
-      yieldAll(
-        generateSequence(1) { it + 1 }.map {
-          File(
-            root, fileName.replace(".", "_$it.")
-          )
-        }
-      )
-    }.first { !it.isFileExist() }
     val source = if (url == null) Uri.parse(src) else Uri.parse(url)
     return try {
       zimReaderContainer.load("$source", emptyMap()).data.use { inputStream ->

core/src/main/res/values/strings.xml

@@ -373,4 +373,6 @@
   <string name="zim_file_content_description">ZIM file which has the reading content</string>
   <string name="select_language_content_description">Selecting this language will prioritize displaying downloadable books in that language at the top.</string>
   <string name="toolbar_back_button_content_description">Go to previous screen</string>
+  <string name="save_or_open_unsupported_files_dialog_title">Save or Open this file?</string>
+  <string name="save_or_open_unsupported_files_dialog_message">Choosing Open will open this file in external reader application.</string>
 </resources>