Manage download states

app/build.gradle

@@ -98,11 +98,12 @@ dependencies {
 	implementation 'androidx.recyclerview:recyclerview:1.3.0'
 	implementation 'androidx.viewpager2:viewpager2:1.1.0-beta01'
 	implementation 'androidx.preference:preference-ktx:1.2.0'
-	implementation 'androidx.work:work-runtime-ktx:2.8.1'
 	implementation 'androidx.biometric:biometric-ktx:1.2.0-alpha05'
 	implementation 'com.google.android.material:material:1.8.0'
 	//noinspection LifecycleAnnotationProcessorWithJava8
 	kapt 'androidx.lifecycle:lifecycle-compiler:2.6.1'
+	implementation 'androidx.work:work-runtime-ktx:2.8.1'
+	implementation 'com.google.guava:guava:31.1-android'
 
 	implementation 'androidx.room:room-runtime:2.5.1'
 	implementation 'androidx.room:room-ktx:2.5.1'

app/src/main/AndroidManifest.xml

@@ -128,7 +128,7 @@
 			android:name="org.koitharu.kotatsu.settings.protect.ProtectSetupActivity"
 			android:windowSoftInputMode="adjustResize" />
 		<activity
-			android:name="org.koitharu.kotatsu.download.ui.DownloadsActivity"
+			android:name="org.koitharu.kotatsu.download.ui.list.DownloadsActivity"
 			android:label="@string/downloads"
 			android:launchMode="singleTop" />
 		<activity android:name="org.koitharu.kotatsu.image.ui.ImageActivity" />

app/src/main/java/org/koitharu/kotatsu/download/domain/DownloadState2.kt

@@ -4,45 +4,57 @@ import androidx.work.Data
 import org.koitharu.kotatsu.history.domain.PROGRESS_NONE
 import org.koitharu.kotatsu.local.data.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
-import java.util.UUID
+import java.util.Date
 
 data class DownloadState2(
-	val id: UUID,
 	val manga: Manga,
-	val state: State,
+	val isIndeterminate: Boolean,
+	val isPaused: Boolean = false,
 	val error: Throwable? = null,
 	val totalChapters: Int = 0,
 	val currentChapter: Int = 0,
 	val totalPages: Int = 0,
 	val currentPage: Int = 0,
-	val timeLeft: Long = -1L,
+	val eta: Long = -1L,
 	val localManga: LocalManga? = null,
+	val timestamp: Long = System.currentTimeMillis(),
 ) {
 
-	val isTerminal: Boolean
-		get() = state == State.FAILED || state == State.CANCELLED || state == State.DONE
-
 	val max: Int = totalChapters * totalPages
 
 	val progress: Int = totalPages * currentChapter + currentPage + 1
 
 	val percent: Float = if (max > 0) progress.toFloat() / max else PROGRESS_NONE
 
+	val isFinalState: Boolean
+		get() = localManga != null || (error != null && !isPaused)
+
 	fun toWorkData() = Data.Builder()
-		.putString(DATA_UUID, id.toString())
 		.putLong(DATA_MANGA_ID, manga.id)
-		.putString(DATA_STATE, state.name)
+		.putInt(DATA_MAX, max)
+		.putInt(DATA_PROGRESS, progress)
+		.putLong(DATA_ETA, eta)
+		.putLong(DATA_TIMESTAMP, timestamp)
+		.putString(DATA_ERROR, error?.toString())
 		.build()
 
-	enum class State {
-
-		PREPARING, PROGRESS, PAUSED, FAILED, CANCELLED, DONE
-	}
-
 	companion object {
 
-		private const val DATA_UUID = "uuid"
 		private const val DATA_MANGA_ID = "manga_id"
-		private const val DATA_STATE = "state"
+		private const val DATA_MAX = "max"
+		private const val DATA_PROGRESS = "progress"
+		private const val DATA_ETA = "eta"
+		private const val DATA_TIMESTAMP = "timestamp"
+		private const val DATA_ERROR = "error"
+
+		fun getMangaId(data: Data): Long = data.getLong(DATA_MANGA_ID, 0L)
+
+		fun getMax(data: Data) = data.getInt(DATA_MAX, 0)
+
+		fun getProgress(data: Data) = data.getInt(DATA_PROGRESS, 0)
+
+		fun getEta(data: Data) = data.getLong(DATA_ETA, -1L)
+
+		fun getTimestamp(data: Data) = Date(data.getLong(DATA_TIMESTAMP, 0L))
 	}
 }

app/src/main/java/org/koitharu/kotatsu/download/ui/DownloadItemAD.kt

@@ -1,140 +0,0 @@
-package org.koitharu.kotatsu.download.ui
-
-import android.view.View
-import androidx.core.view.isVisible
-import androidx.lifecycle.LifecycleOwner
-import androidx.lifecycle.lifecycleScope
-import coil.ImageLoader
-import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.databinding.ItemDownloadBinding
-import org.koitharu.kotatsu.details.ui.DetailsActivity
-import org.koitharu.kotatsu.download.domain.DownloadState
-import org.koitharu.kotatsu.parsers.util.format
-import org.koitharu.kotatsu.utils.ext.enqueueWith
-import org.koitharu.kotatsu.utils.ext.getDisplayMessage
-import org.koitharu.kotatsu.utils.ext.newImageRequest
-import org.koitharu.kotatsu.utils.ext.onFirst
-import org.koitharu.kotatsu.utils.ext.source
-
-fun downloadItemAD(
-	lifecycleOwner: LifecycleOwner,
-	coil: ImageLoader,
-) = adapterDelegateViewBinding<DownloadItem, DownloadItem, ItemDownloadBinding>(
-	{ inflater, parent -> ItemDownloadBinding.inflate(inflater, parent, false) },
-) {
-	var job: Job? = null
-	val percentPattern = context.resources.getString(R.string.percent_string_pattern)
-
-	val clickListener = View.OnClickListener { v ->
-		when (v.id) {
-			R.id.button_cancel -> item.cancel()
-			R.id.button_resume -> item.resume()
-			else -> context.startActivity(
-				DetailsActivity.newIntent(context, item.progressValue.manga),
-			)
-		}
-	}
-	binding.buttonCancel.setOnClickListener(clickListener)
-	binding.buttonResume.setOnClickListener(clickListener)
-	itemView.setOnClickListener(clickListener)
-
-	bind {
-		job?.cancel()
-		job = item.progressAsFlow().onFirst { state ->
-			binding.imageViewCover.newImageRequest(lifecycleOwner, state.manga.coverUrl)?.run {
-				placeholder(state.cover)
-				fallback(R.drawable.ic_placeholder)
-				error(R.drawable.ic_error_placeholder)
-				source(state.manga.source)
-				allowRgb565(true)
-				enqueueWith(coil)
-			}
-		}.onEach { state ->
-			binding.textViewTitle.text = state.manga.title
-			when (state) {
-				is DownloadState.Cancelled -> {
-					binding.textViewStatus.setText(R.string.cancelling_)
-					binding.progressBar.isIndeterminate = true
-					binding.progressBar.isVisible = true
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = false
-					binding.buttonResume.isVisible = false
-				}
-
-				is DownloadState.Done -> {
-					binding.textViewStatus.setText(R.string.download_complete)
-					binding.progressBar.isIndeterminate = false
-					binding.progressBar.isVisible = false
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = false
-					binding.buttonResume.isVisible = false
-				}
-
-				is DownloadState.Error -> {
-					binding.textViewStatus.setText(R.string.error_occurred)
-					binding.progressBar.isIndeterminate = false
-					binding.progressBar.isVisible = false
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.text = state.error.getDisplayMessage(context.resources)
-					binding.textViewDetails.isVisible = true
-					binding.buttonCancel.isVisible = state.canRetry
-					binding.buttonResume.isVisible = state.canRetry
-				}
-
-				is DownloadState.PostProcessing -> {
-					binding.textViewStatus.setText(R.string.processing_)
-					binding.progressBar.isIndeterminate = true
-					binding.progressBar.isVisible = true
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = false
-					binding.buttonResume.isVisible = false
-				}
-
-				is DownloadState.Preparing -> {
-					binding.textViewStatus.setText(R.string.preparing_)
-					binding.progressBar.isIndeterminate = true
-					binding.progressBar.isVisible = true
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = true
-					binding.buttonResume.isVisible = false
-				}
-
-				is DownloadState.Progress -> {
-					binding.textViewStatus.setText(R.string.manga_downloading_)
-					binding.progressBar.isIndeterminate = false
-					binding.progressBar.isVisible = true
-					binding.progressBar.max = state.max
-					binding.progressBar.setProgressCompat(state.progress, true)
-					binding.textViewPercent.text = percentPattern.format((state.percent * 100f).format(1))
-					binding.textViewPercent.isVisible = true
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = true
-					binding.buttonResume.isVisible = false
-				}
-
-				is DownloadState.Queued -> {
-					binding.textViewStatus.setText(R.string.queued)
-					binding.progressBar.isIndeterminate = false
-					binding.progressBar.isVisible = false
-					binding.textViewPercent.isVisible = false
-					binding.textViewDetails.isVisible = false
-					binding.buttonCancel.isVisible = true
-					binding.buttonResume.isVisible = false
-				}
-			}
-		}.launchIn(lifecycleOwner.lifecycleScope)
-	}
-
-	onViewRecycled {
-		job?.cancel()
-		job = null
-	}
-}

app/src/main/java/org/koitharu/kotatsu/download/ui/DownloadsAdapter.kt

@@ -1,46 +0,0 @@
-package org.koitharu.kotatsu.download.ui
-
-import androidx.lifecycle.LifecycleOwner
-import androidx.recyclerview.widget.DiffUtil
-import coil.ImageLoader
-import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
-import org.koitharu.kotatsu.download.domain.DownloadState
-import org.koitharu.kotatsu.utils.progress.PausingProgressJob
-
-typealias DownloadItem = PausingProgressJob<DownloadState>
-
-class DownloadsAdapter(
-	lifecycleOwner: LifecycleOwner,
-	coil: ImageLoader,
-) : AsyncListDifferDelegationAdapter<DownloadItem>(DiffCallback()) {
-
-	init {
-		delegatesManager.addDelegate(downloadItemAD(lifecycleOwner, coil))
-		setHasStableIds(true)
-	}
-
-	override fun getItemId(position: Int): Long {
-		return items[position].progressValue.startId.toLong()
-	}
-
-	private class DiffCallback : DiffUtil.ItemCallback<DownloadItem>() {
-
-		override fun areItemsTheSame(
-			oldItem: DownloadItem,
-			newItem: DownloadItem,
-		): Boolean {
-			return oldItem.progressValue.startId == newItem.progressValue.startId
-		}
-
-		override fun areContentsTheSame(
-			oldItem: DownloadItem,
-			newItem: DownloadItem,
-		): Boolean {
-			return oldItem.progressValue == newItem.progressValue && oldItem.isPaused == newItem.isPaused
-		}
-
-		override fun getChangePayload(oldItem: DownloadItem, newItem: DownloadItem): Any {
-			return Unit
-		}
-	}
-}

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadItemAD.kt

@@ -0,0 +1,113 @@
+package org.koitharu.kotatsu.download.ui.list
+
+import android.view.View
+import androidx.core.view.isVisible
+import androidx.lifecycle.LifecycleOwner
+import androidx.work.WorkInfo
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.databinding.ItemDownloadBinding
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.util.format
+import org.koitharu.kotatsu.utils.ext.disposeImageRequest
+import org.koitharu.kotatsu.utils.ext.enqueueWith
+import org.koitharu.kotatsu.utils.ext.getDisplayMessage
+import org.koitharu.kotatsu.utils.ext.newImageRequest
+import org.koitharu.kotatsu.utils.ext.source
+
+fun downloadItemAD(
+	lifecycleOwner: LifecycleOwner,
+	coil: ImageLoader,
+	listener: DownloadItemListener,
+) = adapterDelegateViewBinding<DownloadItemModel, ListModel, ItemDownloadBinding>(
+	{ inflater, parent -> ItemDownloadBinding.inflate(inflater, parent, false) },
+) {
+
+	val percentPattern = context.resources.getString(R.string.percent_string_pattern)
+
+	val clickListener = View.OnClickListener { v ->
+		when (v.id) {
+			R.id.button_cancel -> listener.onCancelClick(item)
+			R.id.button_resume -> listener.onResumeClick(item)
+			R.id.button_pause -> listener.onPauseClick(item)
+			else -> listener.onItemClick(item, v)
+		}
+	}
+	binding.buttonCancel.setOnClickListener(clickListener)
+	binding.buttonPause.setOnClickListener(clickListener)
+	binding.buttonResume.setOnClickListener(clickListener)
+	itemView.setOnClickListener(clickListener)
+
+	bind { payloads ->
+		binding.textViewTitle.text = item.manga.title
+		binding.imageViewCover.newImageRequest(lifecycleOwner, item.manga.coverUrl)?.apply {
+			placeholder(R.drawable.ic_placeholder)
+			fallback(R.drawable.ic_placeholder)
+			error(R.drawable.ic_error_placeholder)
+			allowRgb565(true)
+			source(item.manga.source)
+			enqueueWith(coil)
+		}
+		when (item.workState) {
+			WorkInfo.State.ENQUEUED,
+			WorkInfo.State.BLOCKED -> {
+				binding.textViewStatus.setText(R.string.queued)
+				binding.progressBar.isIndeterminate = false
+				binding.progressBar.isVisible = false
+				binding.textViewPercent.isVisible = false
+				binding.textViewDetails.isVisible = false
+				binding.buttonCancel.isVisible = true
+				binding.buttonResume.isVisible = false
+			}
+
+			WorkInfo.State.RUNNING -> {
+				binding.textViewStatus.setText(R.string.manga_downloading_)
+				binding.progressBar.isIndeterminate = false
+				binding.progressBar.isVisible = true
+				binding.progressBar.max = item.max
+				binding.progressBar.setProgressCompat(item.progress, payloads.isNotEmpty())
+				binding.textViewPercent.text = percentPattern.format((item.percent * 100f).format(1))
+				binding.textViewPercent.isVisible = true
+				binding.textViewDetails.isVisible = false
+				binding.buttonCancel.isVisible = true
+				binding.buttonResume.isVisible = false
+			}
+
+			WorkInfo.State.SUCCEEDED -> {
+				binding.textViewStatus.setText(R.string.download_complete)
+				binding.progressBar.isIndeterminate = false
+				binding.progressBar.isVisible = false
+				binding.textViewPercent.isVisible = false
+				binding.textViewDetails.isVisible = false
+				binding.buttonCancel.isVisible = false
+				binding.buttonResume.isVisible = false
+			}
+
+			WorkInfo.State.FAILED -> {
+				binding.textViewStatus.setText(R.string.error_occurred)
+				binding.progressBar.isIndeterminate = false
+				binding.progressBar.isVisible = false
+				binding.textViewPercent.isVisible = false
+				binding.textViewDetails.text = item.error?.getDisplayMessage(context.resources)
+				binding.textViewDetails.isVisible = true
+				binding.buttonCancel.isVisible = false
+				binding.buttonResume.isVisible = true
+			}
+
+			WorkInfo.State.CANCELLED -> {
+				binding.textViewStatus.setText(R.string.canceled)
+				binding.progressBar.isIndeterminate = false
+				binding.progressBar.isVisible = false
+				binding.textViewPercent.isVisible = false
+				binding.textViewDetails.isVisible = false
+				binding.buttonCancel.isVisible = false
+				binding.buttonResume.isVisible = false
+			}
+		}
+	}
+
+	onViewRecycled {
+		binding.imageViewCover.disposeImageRequest()
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadItemListener.kt

@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.download.ui.list
+
+import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
+
+interface DownloadItemListener : OnListItemClickListener<DownloadItemModel> {
+
+	fun onCancelClick(item: DownloadItemModel)
+
+	fun onPauseClick(item: DownloadItemModel)
+
+	fun onResumeClick(item: DownloadItemModel)
+
+	fun onRetryClick(item: DownloadItemModel)
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadItemModel.kt

@@ -0,0 +1,25 @@
+package org.koitharu.kotatsu.download.ui.list
+
+import androidx.work.WorkInfo
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.Manga
+import java.util.Date
+import java.util.UUID
+
+data class DownloadItemModel(
+	val id: UUID,
+	val workState: WorkInfo.State,
+	val manga: Manga,
+	val error: Throwable?,
+	val max: Int,
+	val progress: Int,
+	val eta: Long,
+	val createdAt: Date,
+) : ListModel {
+
+	val percent: Float
+		get() = if (max > 0) progress / max.toFloat() else 0f
+
+	val hasEta: Boolean
+		get() = eta > 0L
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadsActivity.kt

@@ -1,8 +1,10 @@
-package org.koitharu.kotatsu.download.ui
+package org.koitharu.kotatsu.download.ui.list
 
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.view.View
+import androidx.activity.viewModels
 import androidx.core.graphics.Insets
 import androidx.core.view.updatePadding
 import coil.ImageLoader
@@ -11,23 +13,31 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseActivity
 import org.koitharu.kotatsu.base.ui.list.decor.SpacingItemDecoration
 import org.koitharu.kotatsu.databinding.ActivityDownloadsBinding
+import org.koitharu.kotatsu.details.ui.DetailsActivity
+import org.koitharu.kotatsu.download.ui.worker.PausingReceiver
 import javax.inject.Inject
 
 @AndroidEntryPoint
-class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
+class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>(), DownloadItemListener {
 
 	@Inject
 	lateinit var coil: ImageLoader
 
+	private val viewModel by viewModels<DownloadsViewModel>()
+
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 		setContentView(ActivityDownloadsBinding.inflate(layoutInflater))
 		supportActionBar?.setDisplayHomeAsUpEnabled(true)
-		val adapter = DownloadsAdapter(this, coil)
+		val adapter = DownloadsAdapter(this, coil, this)
 		val spacing = resources.getDimensionPixelOffset(R.dimen.list_spacing)
 		binding.recyclerView.addItemDecoration(SpacingItemDecoration(spacing))
 		binding.recyclerView.setHasFixedSize(true)
 		binding.recyclerView.adapter = adapter
+
+		viewModel.items.observe(this) {
+			adapter.items = it
+		}
 	}
 
 	override fun onWindowInsetsChanged(insets: Insets) {
@@ -42,6 +52,26 @@ class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
 		)
 	}
 
+	override fun onItemClick(item: DownloadItemModel, view: View) {
+		startActivity(DetailsActivity.newIntent(view.context, item.manga))
+	}
+
+	override fun onCancelClick(item: DownloadItemModel) {
+		viewModel.cancel(item.id)
+	}
+
+	override fun onPauseClick(item: DownloadItemModel) {
+		sendBroadcast(PausingReceiver.getPauseIntent(item.id))
+	}
+
+	override fun onResumeClick(item: DownloadItemModel) {
+		sendBroadcast(PausingReceiver.getResumeIntent(item.id))
+	}
+
+	override fun onRetryClick(item: DownloadItemModel) {
+		// TODO
+	}
+
 	companion object {
 
 		fun newIntent(context: Context) = Intent(context, DownloadsActivity::class.java)

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadsAdapter.kt

@@ -0,0 +1,61 @@
+package org.koitharu.kotatsu.download.ui.list
+
+import androidx.lifecycle.LifecycleOwner
+import androidx.recyclerview.widget.DiffUtil
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
+import org.koitharu.kotatsu.core.ui.DateTimeAgo
+import org.koitharu.kotatsu.list.ui.adapter.emptyStateListAD
+import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
+import org.koitharu.kotatsu.list.ui.adapter.relatedDateItemAD
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import kotlin.jvm.internal.Intrinsics
+
+class DownloadsAdapter(
+	lifecycleOwner: LifecycleOwner,
+	coil: ImageLoader,
+	listener: DownloadItemListener,
+) : AsyncListDifferDelegationAdapter<ListModel>(DiffCallback()) {
+
+	init {
+		delegatesManager.addDelegate(downloadItemAD(lifecycleOwner, coil, listener))
+			.addDelegate(loadingStateAD())
+			.addDelegate(emptyStateListAD(coil, lifecycleOwner, null))
+			.addDelegate(relatedDateItemAD())
+	}
+
+	private class DiffCallback : DiffUtil.ItemCallback<ListModel>() {
+
+		override fun areItemsTheSame(oldItem: ListModel, newItem: ListModel) = when {
+
+			oldItem is DownloadItemModel && newItem is DownloadItemModel -> {
+				oldItem.id == newItem.id
+			}
+
+			oldItem is DateTimeAgo && newItem is DateTimeAgo -> {
+				oldItem == newItem
+			}
+
+			else -> oldItem.javaClass == newItem.javaClass
+		}
+
+		override fun areContentsTheSame(oldItem: ListModel, newItem: ListModel): Boolean {
+			return Intrinsics.areEqual(oldItem, newItem)
+		}
+
+		override fun getChangePayload(oldItem: ListModel, newItem: ListModel): Any? {
+			return when (newItem) {
+				is DownloadItemModel -> {
+					oldItem as DownloadItemModel
+					if (oldItem.workState == newItem.workState) {
+						Unit
+					} else {
+						null
+					}
+				}
+
+				else -> super.getChangePayload(oldItem, newItem)
+			}
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/list/DownloadsViewModel.kt

@@ -0,0 +1,108 @@
+package org.koitharu.kotatsu.download.ui.list
+
+import androidx.collection.LongSparseArray
+import androidx.collection.getOrElse
+import androidx.collection.set
+import androidx.lifecycle.viewModelScope
+import androidx.work.Data
+import androidx.work.WorkInfo
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.mapLatest
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.base.domain.MangaDataRepository
+import org.koitharu.kotatsu.base.ui.BaseViewModel
+import org.koitharu.kotatsu.core.ui.DateTimeAgo
+import org.koitharu.kotatsu.download.domain.DownloadState2
+import org.koitharu.kotatsu.download.ui.worker.DownloadWorker
+import org.koitharu.kotatsu.list.ui.model.EmptyState
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.list.ui.model.LoadingState
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.utils.asFlowLiveData
+import org.koitharu.kotatsu.utils.ext.daysDiff
+import java.util.Date
+import java.util.UUID
+import java.util.concurrent.TimeUnit
+import javax.inject.Inject
+
+@HiltViewModel
+class DownloadsViewModel @Inject constructor(
+	private val workScheduler: DownloadWorker.Scheduler,
+	private val mangaDataRepository: MangaDataRepository,
+) : BaseViewModel() {
+
+	private val mangaCache = LongSparseArray<Manga>()
+
+	val items = workScheduler.observeWorks()
+		.mapLatest { list ->
+			list.mapList()
+		}.asFlowLiveData(viewModelScope.coroutineContext + Dispatchers.Default, listOf(LoadingState))
+
+	private suspend fun List<WorkInfo>.mapList(): List<ListModel> {
+		val destination = ArrayList<ListModel>((size * 1.4).toInt())
+		var prevDate: DateTimeAgo? = null
+		for (item in this) {
+			val model = item.toUiModel() ?: continue
+			val date = timeAgo(model.createdAt)
+			if (prevDate != date) {
+				destination += date
+			}
+			prevDate = date
+			destination += model
+		}
+		if (destination.isEmpty()) {
+			destination.add(
+				EmptyState(
+					icon = R.drawable.ic_empty_common,
+					textPrimary = R.string.text_downloads_holder,
+					textSecondary = 0,
+					actionStringRes = 0,
+				),
+			)
+		}
+		return destination
+	}
+
+	private suspend fun WorkInfo.toUiModel(): DownloadItemModel? {
+		val workData = if (progress != Data.EMPTY) progress else outputData
+		val mangaId = DownloadState2.getMangaId(workData)
+		if (mangaId == 0L) return null
+		val manga = mangaCache.getOrElse(mangaId) {
+			mangaDataRepository.findMangaById(mangaId)?.also { mangaCache[mangaId] = it } ?: return null
+		}
+		return DownloadItemModel(
+			id = id,
+			workState = state,
+			manga = manga,
+			error = null,
+			max = DownloadState2.getMax(workData),
+			progress = DownloadState2.getProgress(workData),
+			eta = DownloadState2.getEta(workData),
+			createdAt = DownloadState2.getTimestamp(workData),
+		)
+	}
+
+	fun cancel(id: UUID) {
+		launchJob(Dispatchers.Default) {
+			workScheduler.cancel(id)
+		}
+	}
+
+	fun restart(id: UUID) {
+		// TODO
+	}
+
+	private fun timeAgo(date: Date): DateTimeAgo {
+		val diff = (System.currentTimeMillis() - date.time).coerceAtLeast(0L)
+		val diffMinutes = TimeUnit.MILLISECONDS.toMinutes(diff).toInt()
+		val diffDays = -date.daysDiff(System.currentTimeMillis())
+		return when {
+			diffMinutes < 3 -> DateTimeAgo.JustNow
+			diffDays < 1 -> DateTimeAgo.Today
+			diffDays == 1 -> DateTimeAgo.Yesterday
+			diffDays < 6 -> DateTimeAgo.DaysAgo(diffDays)
+			else -> DateTimeAgo.Absolute(date)
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/service/PausingHandle.kt

@@ -27,4 +27,4 @@ class PausingHandle {
 	fun resume() {
 		paused.value = false
 	}
-}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/worker/DownloadNotificationFactory.kt

@@ -17,14 +17,16 @@ import androidx.work.WorkManager
 import coil.ImageLoader
 import coil.request.ImageRequest
 import coil.size.Scale
-import dagger.Reusable
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedFactory
+import dagger.assisted.AssistedInject
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.details.ui.DetailsActivity
 import org.koitharu.kotatsu.download.domain.DownloadState2
-import org.koitharu.kotatsu.download.ui.DownloadsActivity
+import org.koitharu.kotatsu.download.ui.list.DownloadsActivity
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.format
@@ -34,16 +36,15 @@ import org.koitharu.kotatsu.utils.ext.getDisplayMessage
 import org.koitharu.kotatsu.utils.ext.getDrawableOrThrow
 import org.koitharu.kotatsu.utils.ext.printStackTraceDebug
 import java.util.UUID
-import javax.inject.Inject
 import com.google.android.material.R as materialR
 
 private const val CHANNEL_ID = "download"
 private const val GROUP_ID = "downloads"
 
-@Reusable
-class DownloadNotificationFactory @Inject constructor(
+class DownloadNotificationFactory @AssistedInject constructor(
 	@ApplicationContext private val context: Context,
 	private val coil: ImageLoader,
+	@Assisted private val uuid: UUID,
 ) {
 
 	private val covers = HashMap<Manga, Drawable>()
@@ -64,6 +65,30 @@ class DownloadNotificationFactory @Inject constructor(
 		false,
 	)
 
+	private val actionCancel by lazy {
+		NotificationCompat.Action(
+			materialR.drawable.material_ic_clear_black_24dp,
+			context.getString(android.R.string.cancel),
+			WorkManager.getInstance(context).createCancelPendingIntent(uuid),
+		)
+	}
+
+	private val actionPause by lazy {
+		NotificationCompat.Action(
+			R.drawable.ic_action_pause,
+			context.getString(R.string.pause),
+			PausingReceiver.createPausePendingIntent(context, uuid),
+		)
+	}
+
+	private val actionResume by lazy {
+		NotificationCompat.Action(
+			R.drawable.ic_action_resume,
+			context.getString(R.string.resume),
+			PausingReceiver.createResumePendingIntent(context, uuid),
+		)
+	}
+
 	init {
 		createChannel()
 		builder.setOnlyAlertOnce(true)
@@ -73,6 +98,7 @@ class DownloadNotificationFactory @Inject constructor(
 		builder.setSilent(true)
 		builder.setGroup(GROUP_ID)
 		builder.setGroupAlertBehavior(NotificationCompat.GROUP_ALERT_CHILDREN)
+		builder.priority = NotificationCompat.PRIORITY_DEFAULT
 	}
 
 	suspend fun create(state: DownloadState2?): Notification = mutex.withLock {
@@ -93,21 +119,12 @@ class DownloadNotificationFactory @Inject constructor(
 				NotificationCompat.VISIBILITY_PUBLIC
 			},
 		)
-		when (state?.state) {
-			null -> Unit
-			DownloadState2.State.CANCELLED -> {
-				builder.setProgress(1, 0, true)
-				builder.setContentText(context.getString(R.string.cancelling_))
-				builder.setContentIntent(null)
-				builder.setStyle(null)
-				builder.setOngoing(true)
-				builder.priority = NotificationCompat.PRIORITY_DEFAULT
-			}
-
-			DownloadState2.State.DONE -> {
+		when {
+			state == null -> Unit
+			state.localManga != null -> { // downloaded, final state
 				builder.setProgress(0, 0, false)
 				builder.setContentText(context.getString(R.string.download_complete))
-				builder.setContentIntent(createMangaIntent(context, state.localManga?.manga))
+				builder.setContentIntent(createMangaIntent(context, state.localManga.manga))
 				builder.setAutoCancel(true)
 				builder.setSmallIcon(android.R.drawable.stat_sys_download_done)
 				builder.setCategory(null)
@@ -115,12 +132,26 @@ class DownloadNotificationFactory @Inject constructor(
 				builder.setOngoing(false)
 				builder.setShowWhen(true)
 				builder.setWhen(System.currentTimeMillis())
-				builder.priority = NotificationCompat.PRIORITY_DEFAULT
 			}
 
-			DownloadState2.State.FAILED -> {
-				val message = state.error?.getDisplayMessage(context.resources)
-					?: context.getString(R.string.error_occurred)
+			state.isPaused -> { // paused (with error or manually)
+				builder.setProgress(state.max, state.progress, false)
+				val percent = context.getString(R.string.percent_string_pattern, (state.percent * 100).format())
+				builder.setContentText(percent)
+				builder.setContentText(
+					state.error?.getDisplayMessage(context.resources)
+						?: context.getString(R.string.paused),
+				)
+				builder.setCategory(NotificationCompat.CATEGORY_PROGRESS)
+				builder.setStyle(null)
+				builder.setOngoing(true)
+				builder.setSmallIcon(R.drawable.ic_stat_paused)
+				builder.addAction(actionCancel)
+				builder.addAction(actionResume)
+			}
+
+			state.error != null -> { // error, final state
+				val message = state.error.getDisplayMessage(context.resources)
 				builder.setProgress(0, 0, false)
 				builder.setSmallIcon(android.R.drawable.stat_notify_error)
 				builder.setSubText(context.getString(R.string.error))
@@ -131,23 +162,17 @@ class DownloadNotificationFactory @Inject constructor(
 				builder.setShowWhen(true)
 				builder.setWhen(System.currentTimeMillis())
 				builder.setStyle(NotificationCompat.BigTextStyle().bigText(message))
-				builder.priority = NotificationCompat.PRIORITY_DEFAULT
 			}
 
-			DownloadState2.State.PREPARING -> {
-				builder.setProgress(1, 0, true)
-				builder.setContentText(context.getString(R.string.preparing_))
-				builder.setStyle(null)
-				builder.setOngoing(true)
-				builder.addAction(createCancelAction(state.id))
-				builder.priority = NotificationCompat.PRIORITY_DEFAULT
-			}
-
-			DownloadState2.State.PROGRESS -> {
+			else -> {
 				builder.setProgress(state.max, state.progress, false)
 				val percent = context.getString(R.string.percent_string_pattern, (state.percent * 100).format())
-				if (state.timeLeft > 0L) {
-					val eta = DateUtils.getRelativeTimeSpanString(state.timeLeft, 0L, DateUtils.SECOND_IN_MILLIS)
+				if (state.eta > 0L) {
+					val eta = DateUtils.getRelativeTimeSpanString(
+						state.eta,
+						System.currentTimeMillis(),
+						DateUtils.SECOND_IN_MILLIS,
+					)
 					builder.setContentText(eta)
 					builder.setSubText(percent)
 				} else {
@@ -156,11 +181,9 @@ class DownloadNotificationFactory @Inject constructor(
 				builder.setCategory(NotificationCompat.CATEGORY_PROGRESS)
 				builder.setStyle(null)
 				builder.setOngoing(true)
-				builder.addAction(createCancelAction(state.id))
-				builder.priority = NotificationCompat.PRIORITY_DEFAULT
+				builder.addAction(actionCancel)
+				builder.addAction(actionPause)
 			}
-
-			DownloadState2.State.PAUSED -> TODO()
 		}
 		return builder.build()
 	}
@@ -177,12 +200,6 @@ class DownloadNotificationFactory @Inject constructor(
 		false,
 	)
 
-	private fun createCancelAction(uuid: UUID) = NotificationCompat.Action(
-		materialR.drawable.material_ic_clear_black_24dp,
-		context.getString(android.R.string.cancel),
-		WorkManager.getInstance(context).createCancelPendingIntent(uuid),
-	)
-
 	private suspend fun getCover(manga: Manga) = covers[manga] ?: run {
 		runCatchingCancellable {
 			coil.execute(
@@ -217,4 +234,10 @@ class DownloadNotificationFactory @Inject constructor(
 			}
 		}
 	}
+
+	@AssistedFactory
+	interface Factory {
+
+		fun create(uuid: UUID): DownloadNotificationFactory
+	}
 }

app/src/main/java/org/koitharu/kotatsu/download/ui/worker/DownloadStartedObserver.kt

@@ -4,7 +4,7 @@ import android.view.View
 import androidx.lifecycle.Observer
 import com.google.android.material.snackbar.Snackbar
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.download.ui.DownloadsActivity
+import org.koitharu.kotatsu.download.ui.list.DownloadsActivity
 import org.koitharu.kotatsu.main.ui.owners.BottomNavOwner
 import org.koitharu.kotatsu.utils.ext.findActivity
 

app/src/main/java/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt

@@ -3,7 +3,9 @@ package org.koitharu.kotatsu.download.ui.worker
 import android.app.NotificationManager
 import android.content.Context
 import android.webkit.MimeTypeMap
+import androidx.core.content.ContextCompat
 import androidx.hilt.work.HiltWorker
+import androidx.lifecycle.asFlow
 import androidx.work.Constraints
 import androidx.work.CoroutineWorker
 import androidx.work.Data
@@ -12,6 +14,7 @@ import androidx.work.NetworkType
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.Operation
 import androidx.work.OutOfQuotaPolicy
+import androidx.work.WorkInfo
 import androidx.work.WorkManager
 import androidx.work.WorkerParameters
 import androidx.work.await
@@ -22,6 +25,7 @@ import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
@@ -50,6 +54,8 @@ import org.koitharu.kotatsu.utils.ext.printStackTraceDebug
 import org.koitharu.kotatsu.utils.ext.runCatchingCancellable
 import org.koitharu.kotatsu.utils.progress.TimeLeftEstimator
 import java.io.File
+import java.util.UUID
+import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
 @HiltWorker
@@ -63,32 +69,38 @@ class DownloadWorker @AssistedInject constructor(
 	private val settings: AppSettings,
 	private val mangaRepositoryFactory: MangaRepository.Factory,
 	@LocalStorageChanges private val localStorageChanges: MutableSharedFlow<LocalManga?>,
-	private val notificationFactory: DownloadNotificationFactory,
+	notificationFactoryFactory: DownloadNotificationFactory.Factory,
 ) : CoroutineWorker(appContext, params) {
 
+	private val notificationFactory = notificationFactoryFactory.create(params.id)
 	private val notificationManager = appContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
 
 	@Volatile
 	private lateinit var currentState: DownloadState2
 
+	private val pausingHandle = PausingHandle()
 	private val timeLeftEstimator = TimeLeftEstimator()
 	private val notificationThrottler = Throttler(400)
+	private val pausingReceiver = PausingReceiver(params.id, pausingHandle)
 
 	override suspend fun doWork(): Result {
 		setForeground(getForegroundInfo())
 		val mangaId = inputData.getLong(MANGA_ID, 0L)
 		val manga = mangaDataRepository.findMangaById(mangaId) ?: return Result.failure()
 		val chaptersIds = inputData.getLongArray(CHAPTERS_IDS)?.takeUnless { it.isEmpty() }
-		currentState = DownloadState2(id, manga, DownloadState2.State.PREPARING)
-		val pausingHandle = PausingHandle()
-		downloadMangaImpl(chaptersIds, pausingHandle)
-		val outputData = currentState.toWorkData()
-		return when (currentState.state) {
-			DownloadState2.State.CANCELLED,
-			DownloadState2.State.DONE -> Result.success(outputData)
-
-			DownloadState2.State.FAILED -> Result.failure(outputData)
-			else -> Result.retry()
+		currentState = DownloadState2(manga, isIndeterminate = true)
+		return try {
+			downloadMangaImpl(chaptersIds)
+			Result.success(currentState.toWorkData())
+		} catch (e: CancellationException) {
+			throw e
+		} catch (e: IOException) {
+			e.printStackTraceDebug()
+			Result.retry()
+		} catch (e: Exception) {
+			e.printStackTraceDebug()
+			currentState = currentState.copy(error = e)
+			Result.failure(currentState.toWorkData())
 		}
 	}
 
@@ -97,13 +109,16 @@ class DownloadWorker @AssistedInject constructor(
 		notificationFactory.create(null),
 	)
 
-	private suspend fun downloadMangaImpl(
-		chaptersIds: LongArray?,
-		pausingHandle: PausingHandle,
-	) {
+	private suspend fun downloadMangaImpl(chaptersIds: LongArray?) {
 		var manga = currentState.manga
 		val chaptersIdsSet = chaptersIds?.toMutableSet()
 		withMangaLock(manga) {
+			ContextCompat.registerReceiver(
+				applicationContext,
+				pausingReceiver,
+				PausingReceiver.createIntentFilter(id),
+				ContextCompat.RECEIVER_NOT_EXPORTED,
+			)
 			val destination = localMangaRepository.getOutputDir(manga)
 			checkNotNull(destination) { applicationContext.getString(R.string.cannot_find_available_storage) }
 			val tempFileName = "${manga.id}_$id.tmp"
@@ -149,12 +164,11 @@ class DownloadWorker @AssistedInject constructor(
 						}
 						publishState(
 							currentState.copy(
-								state = DownloadState2.State.PROGRESS,
 								totalChapters = chapters.size,
 								currentChapter = chapterIndex,
 								totalPages = pages.size,
 								currentPage = pageIndex,
-								timeLeft = timeLeftEstimator.getEstimatedTimeLeft(),
+								eta = timeLeftEstimator.getEta(),
 							),
 						)
 
@@ -168,20 +182,20 @@ class DownloadWorker @AssistedInject constructor(
 						}.onFailure(Throwable::printStackTraceDebug)
 					}
 				}
-				publishState(currentState.copy(state = DownloadState2.State.PROGRESS))
+				publishState(currentState.copy(isIndeterminate = true))
 				output.mergeWithExisting()
 				output.finish()
 				val localManga = LocalMangaInput.of(output.rootFile).getManga()
 				localStorageChanges.emit(localManga)
-				publishState(currentState.copy(state = DownloadState2.State.DONE, localManga = localManga))
-			} catch (e: CancellationException) {
-				publishState(currentState.copy(state = DownloadState2.State.CANCELLED))
+				publishState(currentState.copy(localManga = localManga))
+			} catch (e: Exception) {
+				if (e !is CancellationException) {
+					publishState(currentState.copy(error = e))
+				}
 				throw e
-			} catch (e: Throwable) {
-				e.printStackTraceDebug()
-				publishState(currentState.copy(state = DownloadState2.State.FAILED, error = e))
 			} finally {
 				withContext(NonCancellable) {
+					applicationContext.unregisterReceiver(pausingReceiver)
 					output?.closeQuietly()
 					output?.cleanup()
 					File(destination, tempFileName).deleteAwait()
@@ -194,17 +208,22 @@ class DownloadWorker @AssistedInject constructor(
 		pausingHandle: PausingHandle,
 		block: suspend () -> R,
 	): R {
+		if (pausingHandle.isPaused) {
+			publishState(currentState.copy(isPaused = true))
+			pausingHandle.awaitResumed()
+			publishState(currentState.copy(isPaused = false))
+		}
 		var countDown = MAX_FAILSAFE_ATTEMPTS
 		failsafe@ while (true) {
 			try {
 				return block()
 			} catch (e: IOException) {
 				if (countDown <= 0) {
-					publishState(currentState.copy(state = DownloadState2.State.PAUSED, error = e))
+					publishState(currentState.copy(isPaused = true, error = e))
 					countDown = MAX_FAILSAFE_ATTEMPTS
 					pausingHandle.pause()
 					pausingHandle.awaitResumed()
-					publishState(currentState.copy(state = DownloadState2.State.PROGRESS, error = null))
+					publishState(currentState.copy(isPaused = false, error = null))
 				} else {
 					countDown--
 					delay(DOWNLOAD_ERROR_DELAY)
@@ -222,6 +241,7 @@ class DownloadWorker @AssistedInject constructor(
 		val request = Request.Builder()
 			.url(url)
 			.tag(MangaSource::class.java, source)
+			.header(CommonHeaders.ACCEPT, "image/webp,image/png;q=0.9,image/jpeg,*/*;q=0.8")
 			.cacheControl(CommonHeaders.CACHE_CONTROL_NO_STORE)
 			.get()
 			.build()
@@ -236,15 +256,15 @@ class DownloadWorker @AssistedInject constructor(
 
 	private suspend fun publishState(state: DownloadState2) {
 		currentState = state
-		if (state.state == DownloadState2.State.PROGRESS && state.max > 0) {
+		if (!state.isPaused && state.max > 0) {
 			timeLeftEstimator.tick(state.progress, state.max)
 		} else {
 			timeLeftEstimator.emptyTick()
 			notificationThrottler.reset()
 		}
 		val notification = notificationFactory.create(state)
-		if (state.isTerminal) {
-			notificationManager.notify(state.id.toString(), id.hashCode(), notification)
+		if (state.isFinalState) {
+			notificationManager.notify(id.toString(), id.hashCode(), notification)
 		} else if (notificationThrottler.throttle()) {
 			notificationManager.notify(id.hashCode(), notification)
 		}
@@ -264,6 +284,9 @@ class DownloadWorker @AssistedInject constructor(
 		private val dataRepository: MangaDataRepository,
 	) {
 
+		private val workManager: WorkManager
+			inline get() = WorkManager.getInstance(context)
+
 		suspend fun schedule(manga: Manga, chaptersIds: Collection<Long>?) {
 			dataRepository.storeManga(manga)
 			val data = Data.Builder()
@@ -284,6 +307,14 @@ class DownloadWorker @AssistedInject constructor(
 			scheduleImpl(data).await()
 		}
 
+		fun observeWorks(): Flow<List<WorkInfo>> = workManager
+			.getWorkInfosByTagLiveData(TAG)
+			.asFlow()
+
+		suspend fun cancel(id: UUID) {
+			workManager.cancelWorkById(id).await()
+		}
+
 		private fun scheduleImpl(data: Collection<Data>): Operation {
 			val constraints = Constraints.Builder()
 				.setRequiresStorageNotLow(true)
@@ -293,11 +324,12 @@ class DownloadWorker @AssistedInject constructor(
 				OneTimeWorkRequestBuilder<DownloadWorker>()
 					.setConstraints(constraints)
 					.addTag(TAG)
+					.keepResultsForAtLeast(3, TimeUnit.DAYS)
 					.setInputData(inputData)
-					.setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+					.setExpedited(OutOfQuotaPolicy.DROP_WORK_REQUEST)
 					.build()
 			}
-			return WorkManager.getInstance(context).enqueue(requests)
+			return workManager.enqueue(requests)
 		}
 	}
 

app/src/main/java/org/koitharu/kotatsu/download/ui/worker/PausingReceiver.kt

@@ -0,0 +1,66 @@
+package org.koitharu.kotatsu.download.ui.worker
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.net.Uri
+import android.os.PatternMatcher
+import androidx.core.app.PendingIntentCompat
+import org.koitharu.kotatsu.download.ui.service.PausingHandle
+import org.koitharu.kotatsu.utils.ext.toUUIDOrNull
+import java.util.UUID
+
+class PausingReceiver(
+	private val id: UUID,
+	private val pausingHandle: PausingHandle,
+) : BroadcastReceiver() {
+
+	override fun onReceive(context: Context, intent: Intent?) {
+		val uuid = intent?.getStringExtra(EXTRA_UUID)?.toUUIDOrNull()
+		assert(uuid == id)
+		when (intent?.action) {
+			ACTION_RESUME -> pausingHandle.resume()
+			ACTION_PAUSE -> pausingHandle.pause()
+		}
+	}
+
+	companion object {
+
+		private const val ACTION_PAUSE = "org.koitharu.kotatsu.download.PAUSE"
+		private const val ACTION_RESUME = "org.koitharu.kotatsu.download.RESUME"
+		private const val EXTRA_UUID = "uuid"
+		private const val SCHEME = "workuid"
+
+		fun createIntentFilter(id: UUID) = IntentFilter().apply {
+			addAction(ACTION_PAUSE)
+			addAction(ACTION_RESUME)
+			addDataScheme(SCHEME)
+			addDataPath(id.toString(), PatternMatcher.PATTERN_SIMPLE_GLOB)
+		}
+
+		fun getPauseIntent(id: UUID) = Intent(ACTION_PAUSE)
+			.setData(Uri.parse("$SCHEME://$id"))
+			.putExtra(EXTRA_UUID, id.toString())
+
+		fun getResumeIntent(id: UUID) = Intent(ACTION_RESUME)
+			.setData(Uri.parse("$SCHEME://$id"))
+			.putExtra(EXTRA_UUID, id.toString())
+
+		fun createPausePendingIntent(context: Context, id: UUID) = PendingIntentCompat.getBroadcast(
+			context,
+			0,
+			getPauseIntent(id),
+			0,
+			false,
+		)
+
+		fun createResumePendingIntent(context: Context, id: UUID) = PendingIntentCompat.getBroadcast(
+			context,
+			0,
+			getResumeIntent(id),
+			0,
+			false,
+		)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/worker/Throttler.kt

@@ -9,9 +9,13 @@ class Throttler(
 	private var lastTick = 0L
 
 	fun throttle(): Boolean {
-		val prevValue = lastTick
-		lastTick = SystemClock.elapsedRealtime()
-		return lastTick > prevValue + timeoutMs
+		val now = SystemClock.elapsedRealtime()
+		return if (lastTick + timeoutMs <= now) {
+			lastTick = now
+			true
+		} else {
+			false
+		}
 	}
 
 	fun reset() {

app/src/main/java/org/koitharu/kotatsu/settings/tools/ToolsFragment.kt

@@ -16,7 +16,7 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseFragment
 import org.koitharu.kotatsu.core.github.AppVersion
 import org.koitharu.kotatsu.databinding.FragmentToolsBinding
-import org.koitharu.kotatsu.download.ui.DownloadsActivity
+import org.koitharu.kotatsu.download.ui.list.DownloadsActivity
 import org.koitharu.kotatsu.settings.SettingsActivity
 import org.koitharu.kotatsu.settings.about.AppUpdateDialog
 

app/src/main/java/org/koitharu/kotatsu/utils/ext/StringExt.kt

@@ -1,5 +1,7 @@
 package org.koitharu.kotatsu.utils.ext
 
+import java.util.UUID
+
 inline fun String?.ifNullOrEmpty(defaultValue: () -> String): String {
 	return if (this.isNullOrEmpty()) defaultValue() else this
 }
@@ -11,4 +13,11 @@ fun String.longHashCode(): Long {
 		h = 31 * h + this[i].code
 	}
 	return h
-}
+}
+
+fun String.toUUIDOrNull(): UUID? = try {
+	UUID.fromString(this)
+} catch (e: IllegalArgumentException) {
+	e.printStackTraceDebug()
+	null
+}

app/src/main/java/org/koitharu/kotatsu/utils/progress/TimeLeftEstimator.kt

@@ -42,9 +42,14 @@ class TimeLeftEstimator {
 		return if (eta < tooLargeTime) eta else NO_TIME
 	}
 
+	fun getEta(): Long {
+		val etl = getEstimatedTimeLeft()
+		return if (etl == NO_TIME) NO_TIME else System.currentTimeMillis() + etl
+	}
+
 	private class Tick(
-		val value: Int,
-		val total: Int,
-		val time: Long,
+		@JvmField val value: Int,
+		@JvmField val total: Int,
+		@JvmField val time: Long,
 	)
-}
+}

app/src/main/res/drawable-anydpi-v24/ic_stat_paused.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#FFFFFF">
+  <group android:scaleX="1.44427"
+      android:scaleY="1.44427"
+      android:translateX="-5.33124"
+      android:translateY="-5.33124">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M6,19h4L10,5L6,5v14zM14,5v14h4L18,5h-4z"/>
+  </group>
+</vector>

app/src/main/res/drawable/ic_action_pause.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="#000000"
+		android:pathData="M14,19H18V5H14M6,19H10V5H6V19Z" />
+</vector>

app/src/main/res/drawable/ic_action_resume.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="#000000"
+		android:pathData="M8,5.14V19.14L19,12.14L8,5.14Z" />
+</vector>

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

@@ -41,15 +41,4 @@
 		app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
 		tools:listitem="@layout/item_download" />
 
-	<TextView
-		android:id="@+id/textView_holder"
-		android:layout_width="wrap_content"
-		android:layout_height="wrap_content"
-		android:layout_gravity="center"
-		android:layout_margin="20dp"
-		android:gravity="center"
-		android:text="@string/text_downloads_holder"
-		android:textAppearance="?attr/textAppearanceBody2"
-		tools:visibility="visible" />
-
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -93,13 +93,28 @@
 			tools:text="@tools:sample/lorem[3]" />
 
 		<Button
-			android:id="@+id/button_resume"
-			style="@style/Widget.Material3.Button.TextButton"
+			android:id="@+id/button_pause"
+			style="@style/Widget.Material3.Button.TonalButton"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
 			android:layout_marginEnd="4dp"
 			android:layout_marginBottom="4dp"
-			android:text="@string/try_again"
+			android:text="@string/pause"
+			android:visibility="gone"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toStartOf="@id/button_resume"
+			app:layout_constraintTop_toBottomOf="@id/textView_details"
+			app:layout_constraintVertical_bias="1"
+			tools:visibility="visible" />
+
+		<Button
+			android:id="@+id/button_resume"
+			style="@style/Widget.Material3.Button.TonalButton"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginEnd="4dp"
+			android:layout_marginBottom="4dp"
+			android:text="@string/resume"
 			android:visibility="gone"
 			app:layout_constraintBottom_toBottomOf="parent"
 			app:layout_constraintEnd_toStartOf="@id/button_cancel"
@@ -109,7 +124,7 @@
 
 		<Button
 			android:id="@+id/button_cancel"
-			style="@style/Widget.Material3.Button.TextButton"
+			style="@style/Widget.Material3.Button.TonalButton"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
 			android:layout_marginEnd="4dp"

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

@@ -435,4 +435,7 @@
 	<string name="show_on_shelf">Show on the Shelf</string>
 	<string name="sync_auth_hint">You can sign in into an existing account or create a new one</string>
 	<string name="find_similar">Find similar</string>
+	<string name="pause">Pause</string>
+	<string name="resume">Resume</string>
+	<string name="paused">Paused</string>
 </resources>