Major performance and bug fixes to downloads

I tracked down underlying issues to setPersistentId. So I instead removed that entire function here and instead we send the byte data from the view model to it. This also does minor improvements to view model.

This also fixes the underlying cause of many bugs like the byte mismatch and icon bug, while my previous fix for that was just a patch-job, this should fix the underlying cause of them as well.

Overall when testing this makes downloads load with 100% zero lag now.

app/src/main/java/com/lagradost/cloudstream3/ui/download/DownloadAdapter.kt

@@ -114,6 +114,7 @@ class DownloadAdapter(
                         downloadHeaderGotoChild.isVisible = false
 
                         downloadButton.setDefaultClickListener(card.child, downloadHeaderInfo, mediaClickCallback)
+                        downloadButton.setProgress(card.currentBytes, card.totalBytes)
                         downloadButton.isVisible = true
 
                         episodeHolder.setOnClickListener {
@@ -167,6 +168,7 @@ class DownloadAdapter(
                     }
 
                     downloadButton.setDefaultClickListener(card.data, downloadChildEpisodeTextExtra, mediaClickCallback)
+                    downloadButton.setProgress(card.currentBytes, card.totalBytes)
 
                     downloadChildEpisodeText.apply {
                         text = context.getNameFull(d.name, d.episode, d.season)

app/src/main/java/com/lagradost/cloudstream3/ui/download/DownloadViewModel.kt

@@ -18,7 +18,6 @@ import com.lagradost.cloudstream3.utils.DataStore.getKeys
 import com.lagradost.cloudstream3.utils.VideoDownloadHelper
 import com.lagradost.cloudstream3.utils.VideoDownloadManager
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 class DownloadViewModel : ViewModel() {
@@ -43,8 +42,8 @@ class DownloadViewModel : ViewModel() {
 
     fun updateList(context: Context) = viewModelScope.launchSafe {
         val children = withContext(Dispatchers.IO) {
-            val headers = context.getKeys(DOWNLOAD_EPISODE_CACHE)
-            headers.mapNotNull { context.getKey<VideoDownloadHelper.DownloadEpisodeCached>(it) }
+            context.getKeys(DOWNLOAD_EPISODE_CACHE)
+                .mapNotNull { context.getKey<VideoDownloadHelper.DownloadEpisodeCached>(it) }
                 .distinctBy { it.id } // Remove duplicates
         }
 
@@ -57,10 +56,10 @@ class DownloadViewModel : ViewModel() {
 
         // Gets all children downloads
         withContext(Dispatchers.IO) {
-            for (c in children) {
-                val childFile = VideoDownloadManager.getDownloadFileInfoAndUpdateSettings(context, c.id) ?: continue
+            children.forEach { c ->
+                val childFile = VideoDownloadManager.getDownloadFileInfoAndUpdateSettings(context, c.id) ?: return@forEach
 
-                if (childFile.fileLength <= 1) continue
+                if (childFile.fileLength <= 1) return@forEach
                 val len = childFile.totalBytes
                 val flen = childFile.fileLength
 

app/src/main/java/com/lagradost/cloudstream3/ui/download/button/BaseFetchButton.kt

@@ -64,25 +64,9 @@ abstract class BaseFetchButton(context: Context, attributeSet: AttributeSet) :
     var currentMetaData: DownloadMetadata =
         DownloadMetadata(0, 0, 0, null)
 
-    fun setPersistentId(id: Int) {
-        persistentId = id
-        currentMetaData.id = id
+    abstract fun setStatus(status: VideoDownloadManager.DownloadType?)
 
-        VideoDownloadManager.getDownloadFileInfoAndUpdateSettings(context, id)?.let { savedData ->
-            val downloadedBytes = savedData.fileLength
-            val totalBytes = savedData.totalBytes
-
-            /*lastRequest = savedData.uriRequest
-            files = savedData.files
-
-            var totalBytes: Long = 0
-            var downloadedBytes: Long = 0
-            for (file in savedData.files) {
-                downloadedBytes += file.completedLength
-                totalBytes += file.length
-            }*/
-            setProgress(downloadedBytes, totalBytes)
-            // some extra padding for just in case
+    open fun setProgress(downloadedBytes: Long, totalBytes: Long) {
         val status = VideoDownloadManager.downloadStatus[id]
             ?: if (downloadedBytes > 1024L && downloadedBytes + 1024L >= totalBytes) DownloadStatusTell.IsDone else DownloadStatusTell.IsPaused
         currentMetaData.apply {
@@ -92,14 +76,6 @@ abstract class BaseFetchButton(context: Context, attributeSet: AttributeSet) :
             this.status = status
         }
         setStatus(status)
-        } ?: run {
-            resetView()
-        }
-    }
-
-    abstract fun setStatus(status: VideoDownloadManager.DownloadType?)
-
-    open fun setProgress(downloadedBytes: Long, totalBytes: Long) {
         isZeroBytes = downloadedBytes == 0L
         progressBar.post {
             val steps = 10000L
@@ -174,7 +150,7 @@ abstract class BaseFetchButton(context: Context, attributeSet: AttributeSet) :
         val pid = persistentId
         if (pid != null) {
             // refresh in case of onDetachedFromWindow -> onAttachedToWindow while still being ???????
-            setPersistentId(pid)
+            currentMetaData.id = pid
         }
 
         super.onAttachedToWindow()
@@ -198,5 +174,4 @@ abstract class BaseFetchButton(context: Context, attributeSet: AttributeSet) :
      * Get a clean slate again, might be useful in recyclerview?
      * */
     abstract fun resetView()
-
 }

app/src/main/java/com/lagradost/cloudstream3/ui/download/button/PieFetchButton.kt

@@ -167,7 +167,6 @@ open class PieFetchButton(context: Context, attributeSet: AttributeSet) :
         callback: (DownloadClickEvent) -> Unit
     ) {
         this.progressText = textView
-        this.setPersistentId(card.id)
         view.setOnClickListener {
             if (isZeroBytes) {
                 removeKey(KEY_RESUME_PACKAGES, card.id.toString())