feat: add delete all button for downloads

app/src/main/java/com/github/libretube/ui/adapters/DownloadsAdapter.kt

@@ -136,7 +136,7 @@ class DownloadsAdapter(
             .show()
     }
 
-    private fun deleteDownload(position: Int) {
+    fun deleteDownload(position: Int) {
         val download = downloads[position].download
         val items = downloads[position].downloadItems
 

app/src/main/java/com/github/libretube/ui/fragments/DownloadsFragment.kt

@@ -1,6 +1,7 @@
 package com.github.libretube.ui.fragments
 
 import android.content.ComponentName
+import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.content.ServiceConnection
@@ -9,15 +10,14 @@ import android.os.IBinder
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.core.content.ContextCompat
 import androidx.core.view.isGone
+import androidx.core.view.isInvisible
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.RecyclerView
 import com.github.libretube.R
-import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.FragmentDownloadsBinding
 import com.github.libretube.db.DatabaseHolder.Database
 import com.github.libretube.db.obj.DownloadWithItems
@@ -28,10 +28,10 @@ import com.github.libretube.helpers.DownloadHelper
 import com.github.libretube.obj.DownloadStatus
 import com.github.libretube.receivers.DownloadReceiver
 import com.github.libretube.services.DownloadService
-import com.github.libretube.services.OfflinePlayerService
 import com.github.libretube.ui.adapters.DownloadsAdapter
 import com.github.libretube.ui.base.DynamicLayoutManagerFragment
 import com.github.libretube.ui.viewholders.DownloadsViewHolder
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import kotlin.io.path.fileSize
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -83,6 +83,7 @@ class DownloadsFragment : DynamicLayoutManagerFragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        binding.deleteAll.isInvisible = true
 
         val dbDownloads = runBlocking(Dispatchers.IO) {
             Database.downloadDao().getAll()
@@ -93,7 +94,6 @@ class DownloadsFragment : DynamicLayoutManagerFragment() {
 
         binding.downloadsEmpty.isGone = true
         binding.downloads.isVisible = true
-
         val adapter = DownloadsAdapter(requireContext(), downloads) {
             var isDownloading = false
             val ids = it.downloadItems
@@ -155,11 +155,33 @@ class DownloadsFragment : DynamicLayoutManagerFragment() {
             }
         )
 
+
+        if (dbDownloads.isNotEmpty()){
+            binding.deleteAll.isVisible = true
+            binding.deleteAll.setOnClickListener{
+                showDeleteAllDialog(binding.root.context, adapter)
+            }
+        }
+
+
         binding.shuffleBackground.setOnClickListener {
             BackgroundHelper.playOnBackgroundOffline(requireContext(), null)
         }
     }
 
+    private fun showDeleteAllDialog(context: Context, adapter: DownloadsAdapter) {
+        MaterialAlertDialogBuilder(context)
+            .setTitle(R.string.delete_all)
+            .setMessage(R.string.irreversible)
+            .setPositiveButton(R.string.okay) { _, _ ->
+                for (downloadIndex in downloads.size - 1 downTo 0) {
+                    adapter.deleteDownload(downloadIndex)
+                }
+            }
+            .setNegativeButton(R.string.cancel, null)
+            .show()
+    }
+
     override fun onStart() {
         if (DownloadService.IS_DOWNLOAD_RUNNING) {
             val intent = Intent(requireContext(), DownloadService::class.java)
@@ -168,6 +190,7 @@ class DownloadsFragment : DynamicLayoutManagerFragment() {
         super.onStart()
     }
 
+
     override fun onResume() {
         super.onResume()
         val filter = IntentFilter()

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

@@ -34,6 +34,18 @@
         android:layout_height="wrap_content"
         android:visibility="gone" />
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/delete_all"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_marginBottom="80dp"
+        android:layout_marginEnd="18dp"
+        android:contentDescription="@string/shuffle"
+        android:src="@drawable/ic_delete"
+        android:tooltipText="@string/delete"
+        tools:targetApi="o" />
+
     <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/shuffle_background"
         android:layout_width="wrap_content"

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

@@ -286,6 +286,7 @@
     <string name="device_info">Device Info</string>
     <string name="audio_video_summary">Quality and format</string>
     <string name="delete">Delete from downloads</string>
+    <string name="delete_all">All downloads will be deleted!</string>
     <string name="renamePlaylist">Rename playlist</string>
     <string name="wifi">Wi-Fi</string>
     <string name="mobile_data">Mobile data</string>