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PushController.kt
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PushController.kt
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package com.fsck.k9.controller.push
import com.fsck.k9.Account
import com.fsck.k9.Account.FolderMode
import com.fsck.k9.Preferences
import com.fsck.k9.backend.BackendManager
import com.fsck.k9.network.ConnectivityChangeListener
import com.fsck.k9.network.ConnectivityManager
import com.fsck.k9.notification.PushNotificationManager
import com.fsck.k9.notification.PushNotificationState
import com.fsck.k9.notification.PushNotificationState.LISTENING
import com.fsck.k9.notification.PushNotificationState.WAIT_BACKGROUND_SYNC
import com.fsck.k9.notification.PushNotificationState.WAIT_NETWORK
import com.fsck.k9.preferences.BackgroundSync
import com.fsck.k9.preferences.GeneralSettingsManager
import java.util.concurrent.Executors
import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.asCoroutineDispatcher
import kotlinx.coroutines.flow.distinctUntilChanged
import kotlinx.coroutines.flow.launchIn
import kotlinx.coroutines.flow.map
import kotlinx.coroutines.flow.onEach
import kotlinx.coroutines.launch
import timber.log.Timber
/**
* Starts and stops [AccountPushController]s as necessary. Manages the Push foreground service.
*/
class PushController internal constructor(
private val preferences: Preferences,
private val generalSettingsManager: GeneralSettingsManager,
private val backendManager: BackendManager,
private val pushServiceManager: PushServiceManager,
private val bootCompleteManager: BootCompleteManager,
private val autoSyncManager: AutoSyncManager,
private val pushNotificationManager: PushNotificationManager,
private val connectivityManager: ConnectivityManager,
private val accountPushControllerFactory: AccountPushControllerFactory,
private val coroutineScope: CoroutineScope = GlobalScope,
private val coroutineDispatcher: CoroutineDispatcher = Executors.newSingleThreadExecutor().asCoroutineDispatcher(),
) {
private val lock = Any()
private var initializationStarted = false
private val pushers = mutableMapOf<String, AccountPushController>()
private val autoSyncListener = AutoSyncListener(::onAutoSyncChanged)
private val connectivityChangeListener = object : ConnectivityChangeListener {
override fun onConnectivityChanged() = this@PushController.onConnectivityChanged()
override fun onConnectivityLost() = this@PushController.onConnectivityLost()
}
/**
* Initialize [PushController].
*
* Only call this method in situations where starting a foreground service is allowed.
* See https://developer.android.com/about/versions/12/foreground-services
*/
fun init() {
synchronized(lock) {
if (initializationStarted) {
return
}
initializationStarted = true
}
coroutineScope.launch(coroutineDispatcher) {
initInBackground()
}
}
fun disablePush() {
Timber.v("PushController.disablePush()")
coroutineScope.launch(coroutineDispatcher) {
for (account in preferences.accounts) {
account.folderPushMode = FolderMode.NONE
preferences.saveAccount(account)
}
}
}
private fun initInBackground() {
Timber.v("PushController.initInBackground()")
preferences.addOnAccountsChangeListener(::onAccountsChanged)
listenForBackgroundSyncChanges()
backendManager.addListener(::onBackendChanged)
updatePushers()
}
private fun listenForBackgroundSyncChanges() {
generalSettingsManager.getSettingsFlow()
.map { it.backgroundSync }
.distinctUntilChanged()
.onEach {
launchUpdatePushers()
}
.launchIn(coroutineScope)
}
private fun onAccountsChanged() {
launchUpdatePushers()
}
private fun onAutoSyncChanged() {
launchUpdatePushers()
}
private fun onConnectivityChanged() {
coroutineScope.launch(coroutineDispatcher) {
synchronized(lock) {
for (accountPushController in pushers.values) {
accountPushController.reconnect()
}
}
updatePushers()
}
}
private fun onConnectivityLost() {
launchUpdatePushers()
}
private fun onBackendChanged(account: Account) {
coroutineScope.launch(coroutineDispatcher) {
val accountPushController = synchronized(lock) {
pushers.remove(account.uuid)
}
accountPushController?.stop()
updatePushers()
}
}
private fun launchUpdatePushers() {
coroutineScope.launch(coroutineDispatcher) {
updatePushers()
}
}
private fun updatePushers() {
Timber.v("PushController.updatePushers()")
val generalSettings = generalSettingsManager.getSettings()
val backgroundSyncDisabledViaSystem = autoSyncManager.isAutoSyncDisabled
val backgroundSyncDisabledInApp = generalSettings.backgroundSync == BackgroundSync.NEVER
val networkNotAvailable = !connectivityManager.isNetworkAvailable()
val realPushAccounts = getPushAccounts()
val pushAccounts = if (backgroundSyncDisabledViaSystem || backgroundSyncDisabledInApp || networkNotAvailable) {
emptyList()
} else {
realPushAccounts
}
val pushAccountUuids = pushAccounts.map { it.uuid }
val arePushersActive = synchronized(lock) {
val currentPushAccountUuids = pushers.keys
val startPushAccountUuids = pushAccountUuids - currentPushAccountUuids
val stopPushAccountUuids = currentPushAccountUuids - pushAccountUuids
if (stopPushAccountUuids.isNotEmpty()) {
Timber.v("..Stopping PushController for accounts: %s", stopPushAccountUuids)
for (accountUuid in stopPushAccountUuids) {
val accountPushController = pushers.remove(accountUuid)
accountPushController?.stop()
}
}
if (startPushAccountUuids.isNotEmpty()) {
Timber.v("..Starting PushController for accounts: %s", startPushAccountUuids)
for (accountUuid in startPushAccountUuids) {
val account = preferences.getAccount(accountUuid) ?: error("Account not found: $accountUuid")
pushers[accountUuid] = accountPushControllerFactory.create(account).also { accountPushController ->
accountPushController.start()
}
}
}
Timber.v("..Running PushControllers: %s", pushers.keys)
pushers.isNotEmpty()
}
when {
realPushAccounts.isEmpty() -> {
stopServices()
}
backgroundSyncDisabledViaSystem -> {
setPushNotificationState(WAIT_BACKGROUND_SYNC)
startServices()
}
networkNotAvailable -> {
setPushNotificationState(WAIT_NETWORK)
startServices()
}
arePushersActive -> {
setPushNotificationState(LISTENING)
startServices()
}
else -> {
stopServices()
}
}
}
private fun getPushAccounts(): List<Account> {
return preferences.accounts.filter { account ->
account.folderPushMode != FolderMode.NONE && backendManager.getBackend(account).isPushCapable
}
}
private fun setPushNotificationState(notificationState: PushNotificationState) {
pushNotificationManager.notificationState = notificationState
}
private fun startServices() {
pushServiceManager.start()
bootCompleteManager.enableReceiver()
registerAutoSyncListener()
registerConnectivityChangeListener()
connectivityManager.start()
}
private fun stopServices() {
pushServiceManager.stop()
bootCompleteManager.disableReceiver()
autoSyncManager.unregisterListener()
unregisterConnectivityChangeListener()
connectivityManager.stop()
}
private fun registerAutoSyncListener() {
if (autoSyncManager.respectSystemAutoSync) {
autoSyncManager.registerListener(autoSyncListener)
} else {
autoSyncManager.unregisterListener()
}
}
private fun registerConnectivityChangeListener() {
connectivityManager.addListener(connectivityChangeListener)
}
private fun unregisterConnectivityChangeListener() {
connectivityManager.removeListener(connectivityChangeListener)
}
}