fix: pass worker inputs without serialization (#44)

Because androidx.work.Data sucks and causes our app to crash.

app/build.gradle.kts

@@ -91,7 +91,6 @@ dependencies {
     // KotlinX
     val serializationVersion = "1.5.1"
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:$serializationVersion")
-    implementation("org.jetbrains.kotlinx:kotlinx-serialization-cbor:$serializationVersion")
     implementation("org.jetbrains.kotlinx:kotlinx-collections-immutable:0.3.5")
 
     // Room

app/src/main/java/app/revanced/manager/di/RepositoryModule.kt

@@ -5,6 +5,7 @@ import app.revanced.manager.domain.repository.ReVancedRepository
 import app.revanced.manager.network.api.ManagerAPI
 import app.revanced.manager.domain.repository.SourcePersistenceRepository
 import app.revanced.manager.domain.repository.SourceRepository
+import app.revanced.manager.domain.worker.WorkerRepository
 import org.koin.core.module.dsl.singleOf
 import org.koin.dsl.module
 
@@ -14,4 +15,5 @@ val repositoryModule = module {
     singleOf(::SourcePersistenceRepository)
     singleOf(::PatchSelectionRepository)
     singleOf(::SourceRepository)
+    singleOf(::WorkerRepository)
 }

app/src/main/java/app/revanced/manager/domain/worker/Worker.kt

@@ -0,0 +1,7 @@
+package app.revanced.manager.domain.worker
+
+import android.content.Context
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+
+abstract class Worker<ARGS>(context: Context, parameters: WorkerParameters) : CoroutineWorker(context, parameters)

app/src/main/java/app/revanced/manager/domain/worker/WorkerRepository.kt

@@ -0,0 +1,36 @@
+package app.revanced.manager.domain.worker
+
+import android.app.Application
+import androidx.work.ExistingWorkPolicy
+import androidx.work.OneTimeWorkRequest
+import androidx.work.OutOfQuotaPolicy
+import androidx.work.WorkManager
+import java.util.UUID
+
+class WorkerRepository(app: Application) {
+    val workManager = WorkManager.getInstance(app)
+
+    /**
+     * The standard WorkManager communication APIs use [androidx.work.Data], which has too many limitations.
+     * We can get around those limits by passing inputs using global variables instead.
+     */
+    val workerInputs = mutableMapOf<UUID, Any>()
+
+    @Suppress("UNCHECKED_CAST")
+    fun <A : Any, W : Worker<A>> claimInput(worker: W): A {
+        val data = workerInputs[worker.id] ?: throw IllegalStateException("Worker was not launched via WorkerRepository")
+        workerInputs.remove(worker.id)
+
+        return data as A
+    }
+
+    inline fun <reified W : Worker<A>, A : Any> launchExpedited(name: String, input: A): UUID {
+        val request =
+            OneTimeWorkRequest.Builder(W::class.java) // create Worker
+                .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+                .build()
+        workerInputs[request.id] = input
+        workManager.enqueueUniqueWork(name, ExistingWorkPolicy.REPLACE, request)
+        return request.id
+    }
+}

app/src/main/java/app/revanced/manager/patcher/worker/PatcherProgressManager.kt

@@ -3,10 +3,9 @@ package app.revanced.manager.patcher.worker
 import android.content.Context
 import androidx.annotation.StringRes
 import app.revanced.manager.R
-import app.revanced.manager.util.serialize
+import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
-import kotlinx.serialization.SerialName
-import kotlinx.serialization.Serializable
+import kotlinx.collections.immutable.toImmutableList
 
 sealed class Progress {
     object Unpacking : Progress()
@@ -18,23 +17,19 @@ sealed class Progress {
     object Saving : Progress()
 }
 
-@Serializable
 enum class State {
     WAITING, COMPLETED, FAILED
 }
 
-@Serializable
 class SubStep(
     val name: String,
     val state: State = State.WAITING,
-    @SerialName("msg")
     val message: String? = null
 )
 
-@Serializable
 class Step(
     @StringRes val name: Int,
-    val substeps: List<SubStep>,
+    val substeps: ImmutableList<SubStep>,
     val state: State = State.WAITING
 )
 
@@ -58,7 +53,7 @@ class PatcherProgressManager(context: Context, selectedPatches: List<String>) {
 
             Step(step.name, step.substeps.mapIndexed { index, subStep ->
                 if (index != key.substep) subStep else SubStep(subStep.name, state, message)
-            }, newStepState)
+            }.toImmutableList(), newStepState)
         }
 
         val isFinal = isLastSubStep && key.step == steps.lastIndex
@@ -95,7 +90,7 @@ class PatcherProgressManager(context: Context, selectedPatches: List<String>) {
 
     fun success() = updateCurrent(State.COMPLETED)
 
-    fun workData() = steps.serialize()
+    fun getProgress(): List<Step> = steps
 
     companion object {
         /**
@@ -110,7 +105,7 @@ class PatcherProgressManager(context: Context, selectedPatches: List<String>) {
 
         private fun generatePatchesStep(selectedPatches: List<String>) = Step(
             R.string.patcher_step_group_patching,
-            selectedPatches.map { SubStep(it) }
+            selectedPatches.map { SubStep(it) }.toImmutableList()
         )
 
         fun generateSteps(context: Context, selectedPatches: List<String>) = mutableListOf(

app/src/main/java/app/revanced/manager/patcher/worker/PatcherWorker.kt

@@ -11,36 +11,39 @@ import android.os.PowerManager
 import android.util.Log
 import android.view.WindowManager
 import androidx.core.content.ContextCompat
-import androidx.work.CoroutineWorker
 import androidx.work.ForegroundInfo
 import androidx.work.WorkerParameters
 import app.revanced.manager.R
 import app.revanced.manager.domain.repository.SourceRepository
+import app.revanced.manager.domain.worker.Worker
+import app.revanced.manager.domain.worker.WorkerRepository
 import app.revanced.manager.patcher.Session
 import app.revanced.manager.patcher.aapt.Aapt
 import app.revanced.manager.util.PatchesSelection
-import app.revanced.manager.util.deserialize
 import app.revanced.manager.util.tag
 import app.revanced.patcher.extensions.PatchExtensions.patchName
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.first
-import kotlinx.serialization.Serializable
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
 import java.io.File
 import java.io.FileNotFoundException
 
 class PatcherWorker(context: Context, parameters: WorkerParameters) :
-    CoroutineWorker(context, parameters),
+    Worker<PatcherWorker.Args>(context, parameters),
     KoinComponent {
     private val sourceRepository: SourceRepository by inject()
+    private val workerRepository: WorkerRepository by inject()
 
-    @Serializable
     data class Args(
         val input: String,
         val output: String,
         val selectedPatches: PatchesSelection,
         val packageName: String,
-        val packageVersion: String
+        val packageVersion: String,
+        val progress: MutableStateFlow<ImmutableList<Step>>
     )
 
     companion object {
@@ -75,7 +78,7 @@ class PatcherWorker(context: Context, parameters: WorkerParameters) :
             return Result.failure()
         }
 
-        val args = inputData.deserialize<Args>()!!
+        val args = workerRepository.claimInput(this)
 
         try {
             // This does not always show up for some reason.
@@ -113,9 +116,11 @@ class PatcherWorker(context: Context, parameters: WorkerParameters) :
         val progressManager =
             PatcherProgressManager(applicationContext, args.selectedPatches.flatMap { it.value })
 
-        suspend fun updateProgress(progress: Progress) {
-            progressManager.handle(progress)
-            setProgress(progressManager.workData())
+        val progressFlow = args.progress
+
+        fun updateProgress(progress: Progress?) {
+            progress?.let { progressManager.handle(it) }
+            progressFlow.value = progressManager.getProgress().toImmutableList()
         }
 
         return try {
@@ -143,11 +148,13 @@ class PatcherWorker(context: Context, parameters: WorkerParameters) :
 
             Log.i(tag, "Patching succeeded".logFmt())
             progressManager.success()
-            Result.success(progressManager.workData())
+            Result.success()
         } catch (e: Exception) {
             Log.e(tag, "Got exception while patching".logFmt(), e)
             progressManager.failure(e)
-            Result.failure(progressManager.workData())
+            Result.failure()
+        } finally {
+            updateProgress(null)
         }
     }
 }

app/src/main/java/app/revanced/manager/ui/screen/InstallerScreen.kt

@@ -11,8 +11,6 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Cancel
 import androidx.compose.material.icons.filled.CheckCircle
-import androidx.compose.material.icons.filled.KeyboardArrowDown
-import androidx.compose.material.icons.filled.KeyboardArrowUp
 import androidx.compose.material.icons.outlined.HelpOutline
 import androidx.compose.material.icons.outlined.MoreVert
 import androidx.compose.material3.*
@@ -33,6 +31,7 @@ import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import app.revanced.manager.R
 import app.revanced.manager.patcher.worker.Step
 import app.revanced.manager.patcher.worker.State
@@ -41,7 +40,6 @@ import app.revanced.manager.ui.component.AppTopBar
 import app.revanced.manager.ui.component.ArrowButton
 import app.revanced.manager.ui.viewmodel.InstallerViewModel
 import app.revanced.manager.util.APK_MIMETYPE
-import kotlin.math.exp
 import kotlin.math.floor
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -52,8 +50,9 @@ fun InstallerScreen(
 ) {
     val exportApkLauncher =
         rememberLauncherForActivityResult(CreateDocument(APK_MIMETYPE), vm::export)
-    val patcherState by vm.patcherState.observeAsState(vm.initialState)
-    val canInstall by remember { derivedStateOf { patcherState.succeeded == true && (vm.installedPackageName != null || !vm.isInstalling) } }
+    val patcherState by vm.patcherState.observeAsState(null)
+    val steps by vm.progress.collectAsStateWithLifecycle()
+    val canInstall by remember { derivedStateOf { patcherState == true && (vm.installedPackageName != null || !vm.isInstalling) } }
 
     AppScaffold(
         topBar = {
@@ -77,7 +76,7 @@ fun InstallerScreen(
                 .verticalScroll(rememberScrollState())
                 .fillMaxSize()
         ) {
-            patcherState.steps.forEach {
+            steps.forEach {
                 InstallStep(it)
             }
             Spacer(modifier = Modifier.weight(1f))

app/src/main/java/app/revanced/manager/ui/viewmodel/InstallerViewModel.kt

@@ -18,18 +18,19 @@ import androidx.lifecycle.map
 import androidx.work.*
 import app.revanced.manager.domain.manager.KeystoreManager
 import app.revanced.manager.R
+import app.revanced.manager.domain.worker.WorkerRepository
 import app.revanced.manager.patcher.worker.PatcherProgressManager
 import app.revanced.manager.patcher.worker.PatcherWorker
-import app.revanced.manager.patcher.worker.Step
 import app.revanced.manager.service.InstallService
 import app.revanced.manager.service.UninstallService
 import app.revanced.manager.util.AppInfo
 import app.revanced.manager.util.PM
 import app.revanced.manager.util.PatchesSelection
-import app.revanced.manager.util.deserialize
-import app.revanced.manager.util.serialize
 import app.revanced.manager.util.tag
 import app.revanced.manager.util.toast
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
 import java.io.File
@@ -43,6 +44,7 @@ class InstallerViewModel(
     private val keystoreManager: KeystoreManager by inject()
     private val app: Application by inject()
     private val pm: PM by inject()
+    private val workerRepository: WorkerRepository by inject()
 
     val packageName: String = input.packageName
     private val outputFile = File(app.cacheDir, "output.apk")
@@ -57,38 +59,31 @@ class InstallerViewModel(
 
     private val workManager = WorkManager.getInstance(app)
 
-    private val patcherWorker =
-        OneTimeWorkRequest.Builder(PatcherWorker::class.java) // create Worker
-            .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST).setInputData(
-                PatcherWorker.Args(
-                    input.path!!.absolutePath,
-                    outputFile.path,
-                    selectedPatches,
-                    input.packageName,
-                    input.packageInfo!!.versionName,
-                ).serialize()
-            ).build()
-
-    val initialState = PatcherState(
-        succeeded = null,
-        steps = PatcherProgressManager.generateSteps(
-            app,
-            selectedPatches.flatMap { (_, selected) -> selected }
+    private val _progress = MutableStateFlow(PatcherProgressManager.generateSteps(
+        app,
+        selectedPatches.flatMap { (_, selected) -> selected }
+    ).toImmutableList())
+    val progress = _progress.asStateFlow()
+
+    private val patcherWorkerId =
+        workerRepository.launchExpedited<PatcherWorker, PatcherWorker.Args>(
+            "patching", PatcherWorker.Args(
+                input.path!!.absolutePath,
+                outputFile.path,
+                selectedPatches,
+                input.packageName,
+                input.packageInfo!!.versionName,
+                _progress
+            )
         )
-    )
-    val patcherState =
-        workManager.getWorkInfoByIdLiveData(patcherWorker.id).map { workInfo: WorkInfo ->
-            var status: Boolean? = null
-            val steps = when (workInfo.state) {
-                WorkInfo.State.RUNNING -> workInfo.progress
-                WorkInfo.State.FAILED, WorkInfo.State.SUCCEEDED -> workInfo.outputData.also {
-                    status = workInfo.state == WorkInfo.State.SUCCEEDED
-                }
 
+    val patcherState =
+        workManager.getWorkInfoByIdLiveData(patcherWorkerId).map { workInfo: WorkInfo ->
+            when (workInfo.state) {
+                WorkInfo.State.SUCCEEDED -> true
+                WorkInfo.State.FAILED -> false
                 else -> null
-            }?.deserialize<List<Step>>()
-
-            PatcherState(status, steps ?: initialState.steps)
+            }
         }
 
     private val installBroadcastReceiver = object : BroadcastReceiver() {
@@ -114,7 +109,6 @@ class InstallerViewModel(
     }
 
     init {
-        workManager.enqueueUniqueWork("patching", ExistingWorkPolicy.KEEP, patcherWorker)
         app.registerReceiver(installBroadcastReceiver, IntentFilter().apply {
             addAction(InstallService.APP_INSTALL_ACTION)
             addAction(UninstallService.APP_UNINSTALL_ACTION)
@@ -124,7 +118,7 @@ class InstallerViewModel(
     override fun onCleared() {
         super.onCleared()
         app.unregisterReceiver(installBroadcastReceiver)
-        workManager.cancelWorkById(patcherWorker.id)
+        workManager.cancelWorkById(patcherWorkerId)
 
         outputFile.delete()
         signedFile.delete()
@@ -165,6 +159,4 @@ class InstallerViewModel(
             isInstalling = false
         }
     }
-
-    data class PatcherState(val succeeded: Boolean?, val steps: List<Step>)
 }