Avoid race condition when recreating the messages NotificationChannel (aa90f436) · Commits · e / os / Mail

app/core/src/main/java/com/fsck/k9/Account.kt

+0 −5

Original line number	Diff line number	Diff line
		@@ -490,11 +490,6 @@ class Account(override val uuid: String) : BaseAccount {
		(oldSyncMode != FolderMode.NONE && syncMode == FolderMode.NONE)
		}

		@Synchronized
		fun incrementMessagesNotificationChannelVersion() {
		messagesNotificationChannelVersion++
		}

		@Synchronized
		fun isSortAscending(sortType: SortType): Boolean {
		return sortAscending.getOrPut(sortType) { sortType.isDefaultAscending }

app/core/src/main/java/com/fsck/k9/notification/NotificationChannelManager.kt

+12 −6

Original line number	Diff line number	Diff line
		@@ -144,12 +144,16 @@ class NotificationChannelManager(

		fun getChannelIdFor(account: Account, channelType: ChannelType): String {
		return if (channelType == ChannelType.MESSAGES) {
		"messages_channel_${account.uuid}${account.messagesNotificationChannelSuffix}"
		getMessagesChannelId(account, account.messagesNotificationChannelSuffix)
		} else {
		"miscellaneous_channel_${account.uuid}"
		}
		}

		private fun getMessagesChannelId(account: Account, suffix: String): String {
		return "messages_channel_${account.uuid}$suffix"
		}

		@RequiresApi(Build.VERSION_CODES.O)
		fun getNotificationConfiguration(account: Account): NotificationConfiguration {
		val channelId = getChannelIdFor(account, ChannelType.MESSAGES)
		@@ -175,11 +179,8 @@ class NotificationChannelManager(
		return
		}

		notificationManager.deleteNotificationChannel(oldChannelId)

		account.incrementMessagesNotificationChannelVersion()

		val newChannelId = getChannelIdFor(account, ChannelType.MESSAGES)
		val newChannelVersion = account.messagesNotificationChannelVersion + 1
		val newChannelId = getMessagesChannelId(account, "_$newChannelVersion")
		val channelName = resourceProvider.messagesChannelName
		val importance = oldNotificationChannel.importance

		@@ -195,6 +196,11 @@ class NotificationChannelManager(
		Timber.v("Old NotificationChannel: %s", oldNotificationChannel)
		Timber.v("New NotificationChannel: %s", newNotificationChannel)
		notificationManager.createNotificationChannel(newNotificationChannel)

		// To avoid a race condition we first create the new NotificationChannel, point the Account to it,
		// then delete the old one.
		account.messagesNotificationChannelVersion = newChannelVersion
		notificationManager.deleteNotificationChannel(oldChannelId)
		}

		@RequiresApi(Build.VERSION_CODES.O)