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/*
* Copyright (C) 2023 MURENA SAS
* Copyright (C) 2022 E FOUNDATION
*
* 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.data
import android.content.Context
import android.content.SharedPreferences
import foundation.e.advancedprivacy.data.repositories.AppListsRepository
import foundation.e.advancedprivacy.domain.entities.ApplicationDescription
import foundation.e.advancedprivacy.trackers.domain.entities.Tracker
import java.io.File
class WhitelistRepository(
context: Context,
private val appListsRepository: AppListsRepository
) {
private var appsWhitelist: Set<String> = HashSet()
private var appUidsWhitelist: Set<Int> = HashSet()
private var trackersWhitelistByApp: MutableMap<String, MutableSet<String>> = HashMap()
private var trackersWhitelistByUid: Map<Int, MutableSet<String>> = HashMap()
private val prefs: SharedPreferences
companion object {
private const val SHARED_PREFS_FILE = "trackers_whitelist_v2"
private const val KEY_BLOCKING_ENABLED = "blocking_enabled"
private const val KEY_APPS_WHITELIST = "apps_whitelist"
private const val KEY_APP_TRACKERS_WHITELIST_PREFIX = "app_trackers_whitelist_"
private const val SHARED_PREFS_FILE_V1 = "trackers_whitelist.prefs"
}
init {
prefs = context.getSharedPreferences(SHARED_PREFS_FILE, Context.MODE_PRIVATE)
reloadCache()
migrate(context)
}
private fun migrate(context: Context) {
if (context.sharedPreferencesExists(SHARED_PREFS_FILE_V1)) {
migrate1To2(context)
}
}
private fun Context.sharedPreferencesExists(fileName: String): Boolean {
return File(
"${applicationInfo.dataDir}/shared_prefs/$fileName.xml"
).exists()
}
private fun migrate1To2(context: Context) {
val prefsV1 = context.getSharedPreferences(SHARED_PREFS_FILE_V1, Context.MODE_PRIVATE)
val editorV2 = prefs.edit()
editorV2.putBoolean(KEY_BLOCKING_ENABLED, prefsV1.getBoolean(KEY_BLOCKING_ENABLED, false))
val apIds = prefsV1.getStringSet(KEY_APPS_WHITELIST, HashSet())?.mapNotNull {
try {
val uid = it.toInt()
appListsRepository.getApp(uid)?.apId
} catch (e: Exception) { null }
}?.toSet() ?: HashSet()
editorV2.putStringSet(KEY_APPS_WHITELIST, apIds)
prefsV1.all.keys.forEach { key ->
if (key.startsWith(KEY_APP_TRACKERS_WHITELIST_PREFIX)) {
try {
val uid = key.substring(KEY_APP_TRACKERS_WHITELIST_PREFIX.length).toInt()
val apId = appListsRepository.getApp(uid)?.apId
apId?.let {
val trackers = prefsV1.getStringSet(key, emptySet())
editorV2.putStringSet(buildAppTrackersKey(apId), trackers)
}
} catch (e: Exception) { }
}
}
editorV2.commit()
context.deleteSharedPreferences(SHARED_PREFS_FILE_V1)
reloadCache()
}
private fun reloadCache() {
isBlockingEnabled = prefs.getBoolean(KEY_BLOCKING_ENABLED, false)
reloadAppsWhiteList()
reloadAllAppTrackersWhiteList()
}
private fun reloadAppsWhiteList() {
appsWhitelist = prefs.getStringSet(KEY_APPS_WHITELIST, HashSet()) ?: HashSet()
appUidsWhitelist = appsWhitelist
.mapNotNull { apId -> appListsRepository.getApp(apId)?.uid }
.toSet()
}
private fun refreshAppUidTrackersWhiteList() {
trackersWhitelistByUid = trackersWhitelistByApp.mapNotNull { (apId, value) ->
appListsRepository.getApp(apId)?.uid?.let { uid ->
uid to value
}
}.toMap()
}
private fun reloadAllAppTrackersWhiteList() {
val map: MutableMap<String, MutableSet<String>> = HashMap()
prefs.all.keys.forEach { key ->
if (key.startsWith(KEY_APP_TRACKERS_WHITELIST_PREFIX)) {
map[key.substring(KEY_APP_TRACKERS_WHITELIST_PREFIX.length)] = (
prefs.getStringSet(key, HashSet()) ?: HashSet()
)
}
}
trackersWhitelistByApp = map
}
var isBlockingEnabled: Boolean = false
get() = field
set(enabled) {
prefs.edit().putBoolean(KEY_BLOCKING_ENABLED, enabled).apply()
field = enabled
}
fun setWhiteListed(apId: String, isWhiteListed: Boolean) {
val current = prefs.getStringSet(KEY_APPS_WHITELIST, HashSet())?.toHashSet() ?: HashSet()
if (isWhiteListed) {
current.add(apId)
} else {
current.remove(apId)
}
prefs.edit().putStringSet(KEY_APPS_WHITELIST, current).commit()
reloadAppsWhiteList()
}
private fun buildAppTrackersKey(apId: String): String {
return KEY_APP_TRACKERS_WHITELIST_PREFIX + apId
}
fun setWhiteListed(tracker: Tracker, apId: String, isWhiteListed: Boolean) {
val trackers = trackersWhitelistByApp.getOrDefault(apId, HashSet())
trackersWhitelistByApp[apId] = trackers
if (isWhiteListed) {
trackers.add(tracker.id)
} else {
trackers.remove(tracker.id)
}
refreshAppUidTrackersWhiteList()
prefs.edit().putStringSet(buildAppTrackersKey(apId), trackers).commit()
}
fun isAppWhiteListed(app: ApplicationDescription): Boolean {
return appsWhitelist.contains(app.apId)
}
fun isWhiteListed(appUid: Int, trackerId: String?): Boolean {
return appUidsWhitelist.contains(appUid) ||
trackersWhitelistByUid.getOrDefault(appUid, HashSet()).contains(trackerId)
}
fun areWhiteListEmpty(): Boolean {
return appsWhitelist.isEmpty() && trackersWhitelistByApp.all { (_, trackers) -> trackers.isEmpty() }
}
fun getWhiteListedApp(): List<ApplicationDescription> {
return appsWhitelist.mapNotNull(appListsRepository::getApp)
}
fun getWhiteListForApp(app: ApplicationDescription): List<String> {
return trackersWhitelistByApp[app.apId]?.toList() ?: emptyList()
}
fun clearWhiteList(apId: String) {
trackersWhitelistByApp.remove(apId)
refreshAppUidTrackersWhiteList()
prefs.edit().remove(buildAppTrackersKey(apId)).commit()
}
}
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