123 lines
4.4 KiB
Kotlin
123 lines
4.4 KiB
Kotlin
/**
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* Nextcloud Android client application
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*
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* @author Chris Narkiewicz
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* Copyright (C) 2020 Chris Narkiewicz <hello@ezaquarii.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.nextcloud.client.files.downloader
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import android.content.Context
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import android.content.Intent
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import android.os.IBinder
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import com.nextcloud.client.account.User
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import com.nextcloud.client.core.LocalConnection
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import com.owncloud.android.datamodel.OCFile
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import java.util.UUID
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class DownloaderConnection(context: Context, val user: User) : LocalConnection<DownloaderService>(context), Downloader {
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private var downloadListeners: MutableSet<(Download) -> Unit> = mutableSetOf()
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private var statusListeners: MutableSet<(Downloader.Status) -> Unit> = mutableSetOf()
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private var binder: DownloaderService.Binder? = null
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private val downloadsRequiringStatusRedelivery: MutableSet<UUID> = mutableSetOf()
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override val isRunning: Boolean
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get() = binder?.isRunning ?: false
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override val status: Downloader.Status
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get() = binder?.status ?: Downloader.Status.EMPTY
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override fun getDownload(uuid: UUID): Download? = binder?.getDownload(uuid)
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override fun getDownload(file: OCFile): Download? = binder?.getDownload(file)
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override fun download(request: Request) {
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val intent = DownloaderService.createDownloadIntent(context, request)
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context.startService(intent)
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if (!isConnected && downloadListeners.size > 0) {
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downloadsRequiringStatusRedelivery.add(request.uuid)
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}
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}
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override fun registerDownloadListener(listener: (Download) -> Unit) {
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downloadListeners.add(listener)
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binder?.registerDownloadListener(listener)
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}
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override fun removeDownloadListener(listener: (Download) -> Unit) {
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downloadListeners.remove(listener)
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binder?.removeDownloadListener(listener)
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}
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override fun registerStatusListener(listener: (Downloader.Status) -> Unit) {
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statusListeners.add(listener)
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binder?.registerStatusListener(listener)
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}
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override fun removeStatusListener(listener: (Downloader.Status) -> Unit) {
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statusListeners.remove(listener)
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binder?.removeStatusListener(listener)
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}
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override fun createBindIntent(): Intent {
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return DownloaderService.createBindIntent(context, user)
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}
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override fun onBound(binder: IBinder) {
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super.onBound(binder)
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this.binder = binder as DownloaderService.Binder
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downloadListeners.forEach { listener ->
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binder.registerDownloadListener(listener)
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}
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statusListeners.forEach { listener ->
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binder.registerStatusListener(listener)
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}
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deliverMissedUpdates()
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}
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/**
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* Since binding and download start are both asynchronous and the order
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* is not guaranteed, some downloads might already finish when service is bound,
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* resulting in lost notifications.
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*
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* Deliver all updates for pending downloads that were scheduled
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* before service has been bound.
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*/
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private fun deliverMissedUpdates() {
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val downloadUpdates = downloadsRequiringStatusRedelivery.mapNotNull { uuid ->
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binder?.getDownload(uuid)
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}
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downloadListeners.forEach { listener ->
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downloadUpdates.forEach { update ->
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listener.invoke(update)
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}
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}
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downloadsRequiringStatusRedelivery.clear()
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if (statusListeners.isNotEmpty()) {
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binder?.status?.let { status ->
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statusListeners.forEach { it.invoke(status) }
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}
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}
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}
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override fun onUnbind() {
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super.onUnbind()
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downloadListeners.forEach { binder?.removeDownloadListener(it) }
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statusListeners.forEach { binder?.removeStatusListener(it) }
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}
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}
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