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/*
* Copyright (C) 2023 MURENA SAS
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package foundation.e.advancedprivacy.trackers.service
import foundation.e.advancedprivacy.domain.entities.ApplicationDescription
import foundation.e.advancedprivacy.domain.entities.FeatureState
import foundation.e.advancedprivacy.domain.entities.MainFeatures
import foundation.e.advancedprivacy.domain.entities.MainFeatures.IpScrambling
import foundation.e.advancedprivacy.domain.entities.MainFeatures.TrackersControl
import foundation.e.advancedprivacy.domain.repositories.LocalStateRepository
import foundation.e.advancedprivacy.domain.usecases.VpnSupervisorUseCase
import foundation.e.advancedprivacy.externalinterfaces.permissions.IPermissionsPrivacyModule
import foundation.e.advancedprivacy.ipscrambler.OrbotSupervisor
import foundation.e.advancedprivacy.trackers.domain.externalinterfaces.TrackersSupervisor
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.flow.drop
import kotlinx.coroutines.flow.dropWhile
import kotlinx.coroutines.launch
class VpnSupervisorUseCaseEos(
private val localStateRepository: LocalStateRepository,
private val orbotSupervisor: OrbotSupervisor,
private val trackersSupervisor: TrackersSupervisor,
private val appDesc: ApplicationDescription,
private val permissionsPrivacyModule: IPermissionsPrivacyModule,
private val scope: CoroutineScope,
) : VpnSupervisorUseCase {
override fun listenSettings() {
trackersSupervisor.start()
scope.launch(Dispatchers.IO) {
localStateRepository.ipScramblingSetting.collect {
applySettings(it)
}
}
scope.launch(Dispatchers.IO) {
localStateRepository.blockTrackers.drop(1).dropWhile { !it }.collect {
localStateRepository.emitStartVpnDisclaimer(TrackersControl())
}
}
}
private suspend fun applySettings(isIpScramblingEnabled: Boolean) {
val currentMode = localStateRepository.internetPrivacyMode.value
when {
(
isIpScramblingEnabled &&
currentMode in setOf(FeatureState.OFF, FeatureState.STOPPING)
) -> {
applyStartIpScrambling()
}
(
!isIpScramblingEnabled &&
currentMode in setOf(FeatureState.ON, FeatureState.STARTING)
) -> {
orbotSupervisor.stop()
}
else -> {}
}
}
private suspend fun applyStartIpScrambling() {
if (orbotSupervisor.prepareAndroidVpn() != null) {
permissionsPrivacyModule.setVpnPackageAuthorization(appDesc.packageName)
val alwaysOnVpnPackage = permissionsPrivacyModule.getAlwaysOnVpnPackage()
if (alwaysOnVpnPackage != null) {
localStateRepository.emitOtherVpnRunning(
permissionsPrivacyModule.getApplicationDescription(
packageName = alwaysOnVpnPackage,
withIcon = false
)
)
localStateRepository.setIpScramblingSetting(enabled = false)
return
}
}
localStateRepository.emitStartVpnDisclaimer(IpScrambling())
startVpnService(IpScrambling())
}
override fun startVpnService(feature: MainFeatures) {
localStateRepository.internetPrivacyMode.value = FeatureState.STARTING
orbotSupervisor.setDNSFilter(null)
orbotSupervisor.start()
}
override fun cancelStartVpnService(feature: MainFeatures) {
localStateRepository.setIpScramblingSetting(enabled = false)
}
}
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