Merge remote-tracking branch 'origin/Issue#2868' into Issue#2868

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

@@ -18,8 +18,10 @@
 
 package org.kiwix.kiwixmobile.core.main;
 
+import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Build;
 import android.util.Log;
 import android.webkit.MimeTypeMap;
 import android.webkit.WebResourceRequest;
@@ -27,9 +29,12 @@ import android.webkit.WebResourceResponse;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import androidx.annotation.Nullable;
+import androidx.core.content.FileProvider;
+import java.io.File;
 import java.util.HashMap;
 import org.kiwix.kiwixmobile.core.CoreApp;
 import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer;
+import org.kiwix.kiwixmobile.core.utils.files.FileUtils;
 
 import static org.kiwix.kiwixmobile.core.reader.ZimFileReader.CONTENT_PREFIX;
 import static org.kiwix.kiwixmobile.core.reader.ZimFileReader.UI_URI;
@@ -97,11 +102,22 @@ public class CoreWebViewClient extends WebViewClient {
   private boolean handleEpubAndPdf(String url) {
     String extension = MimeTypeMap.getFileExtensionFromUrl(url);
     if (DOCUMENT_TYPES.containsKey(extension)) {
+      File savedFile = FileUtils.downloadFileFromUrl(url, null, zimReaderContainer);
+      if (savedFile != null && savedFile.exists()) {
+        Context context = CoreApp.getInstance();
+        Uri uri = Build.VERSION.SDK_INT >= Build.VERSION_CODES.N
+          ? FileProvider.getUriForFile(
+          context,
+          context.getPackageName() + ".fileprovider", savedFile)
+          : Uri.fromFile(savedFile);
         Intent intent = new Intent(Intent.ACTION_VIEW);
-      Uri uri = Uri.parse(url);
         intent.setDataAndType(uri, DOCUMENT_TYPES.get(extension));
         intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+          intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        }
         callback.openExternalUrl(intent);
+      }
       return true;
     }
     return false;

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

@@ -20,12 +20,9 @@ package org.kiwix.kiwixmobile.core.main
 import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Context
-import android.net.Uri
-import android.os.Environment
 import android.os.Handler
 import android.os.Message
 import android.util.AttributeSet
-import android.util.Log
 import android.view.ContextMenu
 import android.view.View
 import android.view.ViewGroup
@@ -40,8 +37,7 @@ import org.kiwix.kiwixmobile.core.extensions.toast
 import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
 import org.kiwix.kiwixmobile.core.utils.LanguageUtils.Companion.getCurrentLocale
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
-import java.io.File
-import java.io.IOException
+import org.kiwix.kiwixmobile.core.utils.files.FileUtils
 import javax.inject.Inject
 
 private const val INITIAL_SCALE = 100
@@ -147,39 +143,16 @@ open class KiwixWebView @SuppressLint("SetJavaScriptEnabled") constructor(
 
   internal class SaveHandler(private val zimReaderContainer: ZimReaderContainer) :
     Handler() {
-    private fun getDecodedFileName(url: String?, src: String?): String =
-      url?.substringAfterLast("/", "")
-        ?.takeIf { it.contains(".") }
-        ?: src?.substringAfterLast("/", "")
-          ?.substringAfterLast("%3A") ?: ""
 
     @SuppressWarnings("NestedBlockDepth")
     override fun handleMessage(msg: Message) {
       val url = msg.data["url"] as? String
       val src = msg.data["src"] as? String
       if (url != null || src != null) {
-        val fileName = getDecodedFileName(url, src)
-        var root =
-          Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
-        if (instance.externalMediaDirs.isNotEmpty()) {
-          root = instance.externalMediaDirs[0]
-        }
-        val fileToSave = sequence {
-          yield(File(root, fileName))
-          yieldAll(
-            generateSequence(1) { it + 1 }.map {
-              File(root, fileName.replace(".", "_$it."))
-            }
-          )
-        }.first { !it.exists() }
-        val source = Uri.parse(src)
-        try {
-          zimReaderContainer.load("$source", emptyMap()).data.use { inputStream ->
-            fileToSave.outputStream().use { inputStream.copyTo(it) }
-          }
-          instance.toast(instance.getString(R.string.save_media_saved, fileToSave.name))
-        } catch (e: IOException) {
-          Log.w("kiwix", "Couldn't save image", e)
+        val savedFile = FileUtils.downloadFileFromUrl(url, src, zimReaderContainer)
+        savedFile?.let {
+          instance.toast(instance.getString(R.string.save_media_saved, it.name))
+        } ?: run {
           instance.toast(R.string.save_media_error)
         }
       }

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

@@ -28,11 +28,13 @@ import android.provider.DocumentsContract
 import android.util.Log
 import android.widget.Toast
 import androidx.documentfile.provider.DocumentFile
+import org.kiwix.kiwixmobile.core.CoreApp
 import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.downloader.ChunkUtils
 import org.kiwix.kiwixmobile.core.entity.LibraryNetworkEntity.Book
 import org.kiwix.kiwixmobile.core.extensions.get
 import org.kiwix.kiwixmobile.core.extensions.toast
+import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
 import java.io.BufferedReader
 import java.io.File
 import java.io.IOException
@@ -288,4 +290,48 @@ object FileUtils {
     }
     return null
   }
+
+  /**
+   * Returns the file name from the url or src. In url it gets the file name from the last '/' and
+   * if it contains '.'. If the url is null then it'll get the file name from the last '/'.
+   * If the url and src doesn't exist it returns the empty string.
+   */
+  fun getDecodedFileName(url: String?, src: String?): String =
+    url?.substringAfterLast("/", "")
+      ?.takeIf { it.contains(".") }
+      ?: src?.substringAfterLast("/", "")
+        ?.substringAfterLast("%3A") ?: ""
+
+  @JvmStatic fun downloadFileFromUrl(
+    url: String?,
+    src: String?,
+    zimReaderContainer: ZimReaderContainer
+  ): File? {
+    val fileName = getDecodedFileName(url, src)
+    var root =
+      Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
+    if (CoreApp.instance.externalMediaDirs.isNotEmpty()) {
+      root = CoreApp.instance.externalMediaDirs[0]
+    }
+    val fileToSave = sequence {
+      yield(File(root, fileName))
+      yieldAll(
+        generateSequence(1) { it + 1 }.map {
+          File(
+            root, fileName.replace(".", "_$it.")
+          )
+        }
+      )
+    }.first { !it.exists() }
+    val source = if (url == null) Uri.parse(src) else Uri.parse(url)
+    return try {
+      zimReaderContainer.load("$source", emptyMap()).data.use { inputStream ->
+        fileToSave.outputStream().use { inputStream.copyTo(it) }
+      }
+      fileToSave
+    } catch (e: IOException) {
+      Log.w("kiwix", "Couldn't save file", e)
+      null
+    }
+  }
 }

core/src/test/java/org/kiwix/kiwixmobile/core/utils/files/FileUtilsTest.kt

@@ -88,4 +88,44 @@ class FileUtilsTest {
     every { mockFile.path } returns "$fileName$extension"
     every { mockFile.exists() } returns fileExists
   }
+
+  @Test
+  fun `test decode file name`() {
+    val fileName =
+      FileUtils.getDecodedFileName(
+        url = "https://kiwix.org/contributors/contributors_list.pdf",
+        src = null
+      )
+    assertThat(fileName).isEqualTo("contributors_list.pdf")
+  }
+
+  @Test
+  fun `test file name if extension doesn't exist`() {
+    val fileName = FileUtils.getDecodedFileName(url = "https://kiwix.org/contributors/", src = null)
+    assertThat(fileName).isEqualTo("")
+  }
+
+  @Test
+  fun `test file name if the url and src doesn't exist`() {
+    val fileName = FileUtils.getDecodedFileName(url = null, src = null)
+    assertThat(fileName).isEqualTo("")
+  }
+
+  @Test
+  fun `test file name if only file name exist`() {
+    val fileName = FileUtils.getDecodedFileName(src = "android_tutorials.pdf", url = null)
+    assertThat(fileName).isEqualTo("")
+  }
+
+  @Test
+  fun `test file name if url doesn't exist`() {
+    val fileName = FileUtils.getDecodedFileName(url = null, src = "/html/images/test.png")
+    assertThat(fileName).isEqualTo("test.png")
+  }
+
+  @Test
+  fun `test file name if url and src's extension doesn't exist`() {
+    val fileName = FileUtils.getDecodedFileName(url = null, src = "/html/images/")
+    assertThat(fileName).isEqualTo("")
+  }
 }