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Add more checks to InstanceIdForegroundAppHelper

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This commit is contained in:
Jonas Lochmann 2022-03-21 01:00:00 +01:00
parent 1a19b9fcc3
commit 8b71b0f369
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1 changed files with 46 additions and 4 deletions
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50
app/src/main/java/io/timelimit/android/integration/platform/android/foregroundapp/InstanceIdForegroundAppHelper.kt
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@ -16,6 +16,7 @@
package io.timelimit.android.integration.platform.android.foregroundapp
import android.annotation.TargetApi
import android.app.usage.UsageEvents
import android.content.Context
import android.os.Build
import android.util.SparseArray
@ -34,13 +35,14 @@ class InstanceIdForegroundAppHelper(context: Context): UsageStatsForegroundAppHe
private var lastQueryTime = 0L
private var lastEventTimestamp = 0L
private val apps = SparseArray<ForegroundApp>()
private val nativeEvent = UsageEvents.Event()
override suspend fun getForegroundApps(
queryInterval: Long,
experimentalFlags: Long
): Set<ForegroundApp> {
if (Build.VERSION.SDK_INT > 32) {
throw UntestedSystemVersionException()
throw InstanceIdException.UntestedSystemVersionException()
}
if (getPermissionStatus() != RuntimePermissionStatus.Granted) {
@ -73,10 +75,42 @@ class InstanceIdForegroundAppHelper(context: Context): UsageStatsForegroundAppHe
usageStatsManager.queryEvents(queryStartTime, queryEndTime)?.let { nativeEvents ->
val events = TlUsageEvents.fromUsageEvents(nativeEvents)
var isFirstEvent = true
while (events.readNextItem()) {
lastEventTimestamp = events.timestamp
while (true) {
// loop condition with additional checks
val didReadEvent = kotlin.run {
val didReadNativeEvent = nativeEvents.getNextEvent(nativeEvent)
val didReadTlEvent = events.readNextItem()
if (didReadNativeEvent != didReadTlEvent) {
throw InstanceIdException.NotMatchingData(
if (didReadTlEvent) "events got next event but nativeEvents not"
else "nativeEvents got next event but events not"
)
}
didReadTlEvent // == didReadNativeEvent
}
if (!didReadEvent) break
// check the consistency
kotlin.run {
if (events.eventType != nativeEvent.eventType) {
throw InstanceIdException.NotMatchingData("got different eventTypes: ${events.eventType} vs ${nativeEvent.eventType}")
}
if (events.timestamp != nativeEvent.timeStamp) {
throw InstanceIdException.NotMatchingData("got different timestamps: ${events.timestamp} vs ${nativeEvent.timeStamp}")
}
if (events.timestamp < lastEventTimestamp && !isFirstEvent) {
throw InstanceIdException.EventsNotSortedByTimestamp()
}
}
// process the event
if (events.eventType == TlUsageEvents.DEVICE_STARTUP) {
apps.clear()
} else if (events.eventType == TlUsageEvents.MOVE_TO_FOREGROUND) {
@ -89,6 +123,10 @@ class InstanceIdForegroundAppHelper(context: Context): UsageStatsForegroundAppHe
) {
apps.remove(events.instanceId)
}
// save values for the next iteration and the next query
isFirstEvent = false
lastEventTimestamp = events.timestamp
}
}
@ -106,5 +144,9 @@ class InstanceIdForegroundAppHelper(context: Context): UsageStatsForegroundAppHe
return result
}
class UntestedSystemVersionException: RuntimeException()
sealed class InstanceIdException(message: String): RuntimeException(message) {
class UntestedSystemVersionException: InstanceIdException("untested system version")
class NotMatchingData(detail: String): InstanceIdException("not matching data: $detail")
class EventsNotSortedByTimestamp: InstanceIdException("events not sorted by timestamp")
}
}