#1173 Do not filter out files over 4GB when storage is fat32, Grey them out instead

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

@@ -32,6 +32,7 @@ import io.reactivex.processors.PublishProcessor
 import io.reactivex.schedulers.Schedulers
 import org.kiwix.kiwixmobile.core.R
 import org.kiwix.kiwixmobile.core.StorageObserver
+import org.kiwix.kiwixmobile.core.base.SideEffect
 import org.kiwix.kiwixmobile.core.dao.FetchDownloadDao
 import org.kiwix.kiwixmobile.core.dao.NewBookDao
 import org.kiwix.kiwixmobile.core.dao.NewLanguagesDao
@@ -50,10 +51,6 @@ import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.SelectionMode.NORM
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.adapter.BooksOnDiskListItem
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.adapter.BooksOnDiskListItem.BookOnDisk
 import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState
-import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CanWrite4GbFile
-import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CannotWrite4GbFile
-import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.NotEnoughSpaceFor4GbFile
-import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.Unknown
 import org.kiwix.kiwixmobile.zim_manager.NetworkState.CONNECTED
 import org.kiwix.kiwixmobile.zim_manager.ZimManageViewModel.FileSelectActions.MultiModeFinished
 import org.kiwix.kiwixmobile.zim_manager.ZimManageViewModel.FileSelectActions.RequestDeleteMultiSelection
@@ -66,7 +63,6 @@ import org.kiwix.kiwixmobile.zim_manager.fileselect_view.effects.DeleteFiles
 import org.kiwix.kiwixmobile.zim_manager.fileselect_view.effects.None
 import org.kiwix.kiwixmobile.zim_manager.fileselect_view.effects.OpenFile
 import org.kiwix.kiwixmobile.zim_manager.fileselect_view.effects.ShareFiles
-import org.kiwix.kiwixmobile.core.base.SideEffect
 import org.kiwix.kiwixmobile.zim_manager.fileselect_view.effects.StartMultiSelection
 import org.kiwix.kiwixmobile.zim_manager.library_view.adapter.LibraryListItem
 import org.kiwix.kiwixmobile.zim_manager.library_view.adapter.LibraryListItem.BookItem
@@ -354,14 +350,6 @@ class ZimManageViewModel @Inject constructor(
     val booksUnfilteredByLanguage =
       applyUserFilter(
         libraryNetworkEntity.books
-          .filter {
-            when (fileSystemState) {
-              Unknown,
-              CannotWrite4GbFile -> isLessThan4GB(it)
-              NotEnoughSpaceFor4GbFile,
-              CanWrite4GbFile -> true
-            }
-          }
           .filterNot { downloadedBooksIds.contains(it.id) }
           .filterNot { downloadingBookIds.contains(it.id) },
         filter
@@ -370,30 +358,29 @@ class ZimManageViewModel @Inject constructor(
     return listOf(
       *createLibrarySection(
         booksUnfilteredByLanguage.filter { activeLanguageCodes.contains(it.language) },
+        fileSystemState,
         R.string.your_languages,
         Long.MAX_VALUE
       ),
       *createLibrarySection(
         booksUnfilteredByLanguage.filterNot { activeLanguageCodes.contains(it.language) },
+        fileSystemState,
         R.string.other_languages,
         Long.MIN_VALUE
       )
     )
   }
 
-  private fun isLessThan4GB(it: Book) =
-    it.size.toLongOrNull() ?: 0L <
-      Fat32Checker.FOUR_GIGABYTES_IN_KILOBYTES
-
   private fun createLibrarySection(
     books: List<Book>,
+    fileSystemState: FileSystemState,
     sectionStringId: Int,
     sectionId: Long
   ) =
     if (books.isNotEmpty())
       arrayOf(
         DividerItem(sectionId, context.getString(sectionStringId)),
-        *toBookItems(books)
+        *toBookItems(books, fileSystemState)
       )
     else emptyArray()
 
@@ -407,8 +394,11 @@ class ZimManageViewModel @Inject constructor(
     booksUnfilteredByLanguage.filter { it.searchMatches > 0 }
   }
 
-  private fun toBookItems(books: List<Book>) =
-    books.map { BookItem(it) }.toTypedArray()
+  private fun toBookItems(
+    books: List<Book>,
+    fileSystemState: FileSystemState
+  ) =
+    books.map { BookItem(it, fileSystemState) }.toTypedArray()
 
   private fun checkFileSystemForBooksOnRequest(booksFromDao: Flowable<List<BookOnDisk>>) =
     requestFileSystemCheck

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/library_view/adapter/LibraryListItem.kt

@@ -19,6 +19,12 @@
 package org.kiwix.kiwixmobile.zim_manager.library_view.adapter
 
 import org.kiwix.kiwixmobile.core.entity.LibraryNetworkEntity.Book
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CanWrite4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CannotWrite4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.NotEnoughSpaceFor4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.Unknown
 
 sealed class LibraryListItem {
   abstract val id: Long
@@ -28,8 +34,22 @@ sealed class LibraryListItem {
     val text: String
   ) : LibraryListItem()
 
-  data class BookItem(
+  data class BookItem constructor(
     val book: Book,
+    val canBeDownloaded: Boolean,
     override val id: Long = book.id.hashCode().toLong()
-  ) : LibraryListItem()
+  ) : LibraryListItem() {
+    constructor(book: Book, fileSystemState: FileSystemState) : this(
+      book,
+      when (fileSystemState) {
+        Unknown, CannotWrite4GbFile -> book.isLessThan4GB()
+        NotEnoughSpaceFor4GbFile, CanWrite4GbFile -> true
+      }
+    )
+
+    companion object {
+      private fun Book.isLessThan4GB() =
+        size.toLongOrNull() ?: 0L < Fat32Checker.FOUR_GIGABYTES_IN_KILOBYTES
+    }
+  }
 }

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/library_view/adapter/LibraryViewHolder.kt

@@ -19,7 +19,6 @@
 package org.kiwix.kiwixmobile.zim_manager.library_view.adapter
 
 import android.view.View
-import kotlinx.android.synthetic.main.library_divider.divider_text
 import kotlinx.android.synthetic.main.item_library.creator
 import kotlinx.android.synthetic.main.item_library.date
 import kotlinx.android.synthetic.main.item_library.description
@@ -29,14 +28,16 @@ import kotlinx.android.synthetic.main.item_library.language
 import kotlinx.android.synthetic.main.item_library.publisher
 import kotlinx.android.synthetic.main.item_library.size
 import kotlinx.android.synthetic.main.item_library.title
+import kotlinx.android.synthetic.main.item_library.unableToDownload
+import kotlinx.android.synthetic.main.library_divider.divider_text
 import org.kiwix.kiwixmobile.core.CoreApp
+import org.kiwix.kiwixmobile.core.base.adapter.BaseViewHolder
 import org.kiwix.kiwixmobile.core.downloader.model.Base64String
 import org.kiwix.kiwixmobile.core.extensions.setBitmap
 import org.kiwix.kiwixmobile.core.extensions.setTextAndVisibility
 import org.kiwix.kiwixmobile.core.utils.BookUtils
 import org.kiwix.kiwixmobile.core.utils.NetworkUtils
 import org.kiwix.kiwixmobile.core.zim_manager.KiloByte
-import org.kiwix.kiwixmobile.core.base.adapter.BaseViewHolder
 import org.kiwix.kiwixmobile.zim_manager.library_view.adapter.LibraryListItem.BookItem
 import org.kiwix.kiwixmobile.zim_manager.library_view.adapter.LibraryListItem.DividerItem
 
@@ -64,6 +65,8 @@ sealed class LibraryViewHolder<in T : LibraryListItem>(containerView: View) :
       containerView.setOnClickListener {
         clickAction.invoke(item)
       }
+      unableToDownload.setOnTouchListener { _, _ -> true }
+      unableToDownload.visibility = if (item.canBeDownloaded) View.GONE else View.VISIBLE
     }
   }
 

app/src/main/res/layout/item_library.xml

@@ -1,115 +1,115 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:background="?selectableItemBackground"
   android:minHeight="?listPreferredItemHeight"
   android:orientation="horizontal"
-  android:paddingLeft="@dimen/activity_horizontal_margin"
-  android:paddingTop="@dimen/activity_vertical_margin"
-  android:paddingRight="@dimen/activity_horizontal_margin"
-  android:paddingBottom="@dimen/activity_vertical_margin"
-  tools:ignore="Overdraw">
+  tools:ignore="Overdraw, RTLHardcoded">
 
   <ImageView
     android:id="@+id/favicon"
     android:layout_width="@dimen/favicon_width"
     android:layout_height="wrap_content"
-    android:layout_gravity="center"
+    android:layout_marginLeft="@dimen/activity_horizontal_margin"
     android:layout_marginRight="@dimen/favicon_margin_right"
     android:adjustViewBounds="true"
     android:scaleType="fitCenter"
     android:src="@mipmap/ic_launcher"
+    app:layout_constraintBottom_toBottomOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintTop_toTopOf="parent"
     tools:ignore="RtlHardcoded" />
 
-  <LinearLayout
-    android:layout_width="0dp"
+  <TextView
+    android:id="@+id/title"
+    style="@style/list_item_title"
+    android:layout_width="wrap_content"
     android:layout_height="wrap_content"
-    android:layout_weight="1"
-    android:orientation="vertical"
-    android:paddingLeft="@dimen/dimen_small_padding"
-    tools:ignore="RtlHardcoded,RtlSymmetry">
+    android:layout_marginLeft="@dimen/favicon_margin_right"
+    android:layout_marginTop="@dimen/activity_horizontal_margin"
+    app:layout_constraintStart_toEndOf="@+id/favicon"
+    app:layout_constraintTop_toTopOf="parent"
+    tools:text="Title" />
 
-    <TextView
-      android:id="@+id/title"
-      style="@style/list_item_title"
-      android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
-      tools:text="Title" />
+  <TextView
+    android:id="@+id/description"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintStart_toStartOf="@+id/title"
+    app:layout_constraintTop_toBottomOf="@+id/title"
+    tools:text="Description" />
 
-    <TextView
-      android:id="@+id/description"
-      style="@style/list_item_body"
-      android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
-      tools:text="Description" />
+  <TextView
+    android:id="@+id/size"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintStart_toStartOf="@+id/description"
+    app:layout_constraintTop_toBottomOf="@+id/description"
+    tools:text="File Size" />
 
-    <LinearLayout
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content"
-      android:baselineAligned="false"
-      android:orientation="horizontal"
-      android:paddingTop="@dimen/dimen_medium_padding">
+  <TextView
+    android:id="@+id/creator"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintStart_toStartOf="@+id/size"
+    app:layout_constraintTop_toBottomOf="@+id/size"
+    tools:text="Author" />
 
-      <LinearLayout
-        android:layout_width="0dp"
-        android:layout_height="match_parent"
-        android:layout_weight="1"
-        android:orientation="vertical">
+  <TextView
+    android:id="@+id/publisher"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingBottom="@dimen/activity_horizontal_margin"
+    app:layout_constraintStart_toStartOf="@+id/creator"
+    app:layout_constraintTop_toBottomOf="@+id/creator"
+    tools:text="Publisher" />
 
-        <TextView
-          android:id="@+id/size"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="File Size" />
 
-        <TextView
-          android:id="@+id/creator"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="Author" />
+  <TextView
+    android:id="@+id/date"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_marginRight="@dimen/activity_horizontal_margin"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintTop_toTopOf="@+id/size"
+    tools:text="Date" />
 
-        <TextView
-          android:id="@+id/publisher"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="Publisher" />
+  <TextView
+    android:id="@+id/language"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintEnd_toEndOf="@+id/date"
+    app:layout_constraintTop_toBottomOf="@+id/date"
+    tools:text="Language" />
 
-      </LinearLayout>
+  <TextView
+    android:id="@+id/fileName"
+    style="@style/list_item_body"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintEnd_toEndOf="@+id/language"
+    app:layout_constraintTop_toBottomOf="@+id/language"
+    tools:text="File Name" />
 
-      <LinearLayout
-        android:layout_width="0dp"
-        android:layout_height="match_parent"
-        android:layout_weight="1"
-        android:gravity="end"
-        android:orientation="vertical">
+  <View
+    android:id="@+id/unableToDownload"
+    android:layout_width="0dp"
+    android:layout_height="0dp"
+    android:alpha=".5"
+    android:background="#808080"
+    app:layout_constraintBottom_toBottomOf="parent"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintTop_toTopOf="parent"
+    tools:visibility="gone" />
 
-        <TextView
-          android:id="@+id/date"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="Date" />
-
-        <TextView
-          android:id="@+id/language"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="Language" />
-
-        <TextView
-          android:id="@+id/fileName"
-          style="@style/list_item_body"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          tools:text="File Name" />
-
-      </LinearLayout>
-    </LinearLayout>
-  </LinearLayout>
-</LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/test/java/org/kiwix/kiwixmobile/zim_manager/ZimManageViewModelTest.kt

@@ -392,15 +392,16 @@ class ZimManageViewModelTest {
       .assertValue(
         listOf(
           LibraryListItem.DividerItem(Long.MAX_VALUE, "1"),
-          LibraryListItem.BookItem(bookWithActiveLanguage),
+          LibraryListItem.BookItem(bookWithActiveLanguage, true),
           LibraryListItem.DividerItem(Long.MIN_VALUE, "2"),
-          LibraryListItem.BookItem(bookWithInactiveLanguage)
+          LibraryListItem.BookItem(bookWithInactiveLanguage, true)
         )
       )
   }
 
   @Test
-  fun `library filters out files over 4GB if file system state says to`() {
+  fun `library marks files over 4GB as can't download if file system state says to`() {
+    every { application.getString(R.string.other_languages) } returns "2"
     val bookOver4Gb = book(
       id = "0",
       url = "",
@@ -423,6 +424,11 @@ class ZimManageViewModelTest {
     testScheduler.advanceTimeBy(500, MILLISECONDS)
     testScheduler.triggerActions()
     viewModel.libraryItems.test()
-      .assertValue(listOf())
+      .assertValue(
+        listOf(
+          LibraryListItem.DividerItem(Long.MIN_VALUE, "2"),
+          LibraryListItem.BookItem(bookOver4Gb, false)
+        )
+      )
   }
 }

app/src/test/java/org/kiwix/kiwixmobile/zim_manager/library_view/adapter/LibraryListItemTest.kt

@@ -0,0 +1,81 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2019 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.zim_manager.library_view.adapter
+
+import io.mockk.clearAllMocks
+import io.mockk.every
+import io.mockk.mockk
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.kiwix.kiwixmobile.core.entity.LibraryNetworkEntity.Book
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CanWrite4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.CannotWrite4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.NotEnoughSpaceFor4GbFile
+import org.kiwix.kiwixmobile.zim_manager.Fat32Checker.FileSystemState.Unknown
+import org.kiwix.kiwixmobile.zim_manager.library_view.adapter.LibraryListItem.BookItem
+
+internal class LibraryListItemTest {
+
+  val book = mockk<Book>()
+
+  @BeforeEach
+  fun init() {
+    clearAllMocks()
+    every { book.getId() } returns "0"
+    every { book.getSize() } returns "0"
+  }
+
+  @Test
+  internal fun `Unknown file system state files under 4GB can be downloaded`() {
+    assertThat(canBeDownloaded(book, Unknown)).isTrue()
+  }
+
+  @Test
+  internal fun `Unknown file system state greater than 4GB can't be downloaded`() {
+    every { book.getSize() } returns (Fat32Checker.FOUR_GIGABYTES_IN_KILOBYTES + 1).toString()
+    assertThat(canBeDownloaded(book, Unknown)).isFalse()
+  }
+
+  @Test
+  internal fun `Unknown file system state empty size can be downloaded`() {
+    every { book.getSize() } returns ""
+    assertThat(canBeDownloaded(book, Unknown)).isTrue()
+  }
+
+  @Test
+  internal fun `CannotWrite4GB file system state can be downloaded`() {
+    assertThat(canBeDownloaded(book, CannotWrite4GbFile)).isTrue()
+  }
+
+  @Test
+  internal fun `CanWrite4GbFile file system state can be downloaded`() {
+    assertThat(canBeDownloaded(book, CanWrite4GbFile)).isTrue()
+  }
+
+  @Test
+  internal fun `NotEnoughSpaceFor4GbFile file system state can be downloaded`() {
+    assertThat(canBeDownloaded(book, NotEnoughSpaceFor4GbFile)).isTrue()
+  }
+
+  private fun canBeDownloaded(book: Book, fileSystemState: FileSystemState) =
+    BookItem(book, fileSystemState).canBeDownloaded
+}