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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 android.content.Context
import android.content.Intent
import foundation.e.advancedprivacy.domain.entities.FeatureServiceState
import foundation.e.advancedprivacy.trackers.domain.externalinterfaces.TrackersServiceSupervisor
import foundation.e.advancedprivacy.trackers.service.data.NetworkDNSAddressRepository
import foundation.e.advancedprivacy.trackers.service.data.RequestDNSRepository
import foundation.e.advancedprivacy.trackers.service.usecases.ResolveDNSUseCase
import kotlinx.coroutines.cancel
import kotlinx.coroutines.flow.MutableStateFlow
import org.koin.core.module.dsl.bind
import org.koin.core.module.dsl.singleOf
import org.koin.dsl.module
import org.pcap4j.packet.DnsPacket
import java.util.function.Function
class TrackersServiceSupervisorImpl(
private val context: Context,
private val resolveDNSUseCase: ResolveDNSUseCase
) : TrackersServiceSupervisor {
internal val state: MutableStateFlow<FeatureServiceState> = MutableStateFlow(FeatureServiceState.OFF)
override fun start(): Boolean {
return if (!isRunning()) {
state.value = FeatureServiceState.STARTING
TrackersService.start(context)
true
} else false
}
override fun stop(): Boolean {
return when (state.value) {
FeatureServiceState.ON -> {
state.value = FeatureServiceState.STOPPING
kotlin.runCatching { TrackersService.coroutineScope.cancel() }
context.stopService(Intent(context, TrackersService::class.java))
true
}
else -> false
}
}
override fun isRunning(): Boolean {
return state.value != FeatureServiceState.OFF
}
override val dnsFilterForIpScrambling = Function<DnsPacket?, DnsPacket?> { dnsRequest -> resolveDNSUseCase.shouldBlock(dnsRequest) }
}
val trackerServiceModule = module {
singleOf(::NetworkDNSAddressRepository)
singleOf(::RequestDNSRepository)
singleOf(::ResolveDNSUseCase)
singleOf(::TunLooper)
singleOf(::TrackersServiceSupervisorImpl) { bind<TrackersServiceSupervisor>() }
}
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