feat: integrate revanced patcher (#22)

app/build.gradle.kts

@@ -30,6 +30,13 @@ android {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
     }
+
+    packagingOptions {
+        resources {
+            excludes += "/prebuilt/**"
+        }
+    }
+
     kotlinOptions {
         jvmTarget = "11"
     }
@@ -43,10 +50,12 @@ dependencies {
 
     // AndroidX Core
     implementation("androidx.core:core-ktx:1.10.1")
+    implementation("androidx.lifecycle:lifecycle-runtime-compose:2.6.1")
     implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
     implementation("androidx.core:core-splashscreen:1.0.1")
     implementation("androidx.activity:activity-compose:1.7.1")
     implementation("androidx.paging:paging-common-ktx:3.1.1")
+    implementation("androidx.work:work-runtime-ktx:2.8.1")
 
     // Compose
     implementation(platform("androidx.compose:compose-bom:2023.05.01"))
@@ -70,11 +79,13 @@ dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.0")
 
     // ReVanced
-    implementation("app.revanced:revanced-patcher:7.0.0")
+    implementation("app.revanced:revanced-patcher:7.1.0")
 
     // Koin
-    implementation("io.insert-koin:koin-android:3.4.0")
+    val koinVersion = "3.4.0"
+    implementation("io.insert-koin:koin-android:$koinVersion")
     implementation("io.insert-koin:koin-androidx-compose:3.4.4")
+    implementation("io.insert-koin:koin-androidx-workmanager:$koinVersion")
 
     // Compose Navigation
     implementation("dev.olshevski.navigation:reimagined:1.4.0")

app/src/main/AndroidManifest.xml

@@ -19,6 +19,8 @@
         android:name=".ManagerApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
+        android:extractNativeLibs="true"
+        android:largeHeap="true"
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
@@ -40,5 +42,16 @@
 
         <service android:name=".service.InstallService" />
         <service android:name=".service.UninstallService" />
+
+        <provider
+                android:name="androidx.startup.InitializationProvider"
+                android:authorities="${applicationId}.androidx-startup"
+                android:exported="false"
+                tools:node="merge">
+            <meta-data
+                    android:name="androidx.work.WorkManagerInitializer"
+                    android:value="androidx.startup"
+                    tools:node="remove" />
+        </provider>
     </application>
 </manifest>

app/src/main/java/app/revanced/manager/compose/MainActivity.kt

@@ -12,6 +12,7 @@ import app.revanced.manager.compose.ui.screen.AppSelectorScreen
 import app.revanced.manager.compose.ui.screen.DashboardScreen
 import app.revanced.manager.compose.ui.screen.PatchesSelectorScreen
 import app.revanced.manager.compose.ui.screen.SettingsScreen
+import app.revanced.manager.compose.ui.screen.InstallerScreen
 import app.revanced.manager.compose.ui.theme.ReVancedManagerTheme
 import app.revanced.manager.compose.ui.theme.Theme
 import app.revanced.manager.compose.util.PM
@@ -24,6 +25,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.launch
 import org.koin.android.ext.android.inject
+import org.koin.androidx.compose.getViewModel
+import org.koin.core.parameter.parametersOf
 
 class MainActivity : ComponentActivity() {
     private val prefs: PreferencesManager by inject()
@@ -53,7 +56,6 @@ class MainActivity : ComponentActivity() {
                     controller = navController
                 ) { destination ->
                     when (destination) {
-
                         is Destination.Dashboard -> DashboardScreen(
                             onSettingsClick = { navController.navigate(Destination.Settings) },
                             onAppSelectorClick = { navController.navigate(Destination.AppSelector) }
@@ -64,14 +66,29 @@ class MainActivity : ComponentActivity() {
                         )
 
                         is Destination.AppSelector -> AppSelectorScreen(
-                            onAppClick = { navController.navigate(Destination.PatchesSelector) },
+                            onAppClick = { navController.navigate(Destination.PatchesSelector(it)) },
                             onBackClick = { navController.pop() }
                         )
 
                         is Destination.PatchesSelector -> PatchesSelectorScreen(
-                            onBackClick = { navController.pop() }
+                            onBackClick = { navController.pop() },
+                            startPatching = {
+                                navController.navigate(
+                                    Destination.Installer(
+                                        destination.input,
+                                        it
+                                    )
+                                )
+                            },
+                            vm = getViewModel { parametersOf(destination.input) }
                         )
 
+                        is Destination.Installer -> InstallerScreen(getViewModel {
+                            parametersOf(
+                                destination.input,
+                                destination.selectedPatches
+                            )
+                        })
                     }
                 }
             }

app/src/main/java/app/revanced/manager/compose/ManagerApplication.kt

@@ -3,20 +3,23 @@ package app.revanced.manager.compose
 import android.app.Application
 import app.revanced.manager.compose.di.*
 import org.koin.android.ext.koin.androidContext
+import org.koin.androidx.workmanager.koin.workManagerFactory
 import org.koin.core.context.startKoin
 
-class ManagerApplication: Application() {
+class ManagerApplication : Application() {
     override fun onCreate() {
         super.onCreate()
 
         startKoin {
             androidContext(this@ManagerApplication)
+            workManagerFactory()
             modules(
                 httpModule,
                 preferencesModule,
                 repositoryModule,
                 serviceModule,
-                viewModelModule
+                workerModule,
+                viewModelModule,
             )
         }
     }

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

@@ -2,10 +2,12 @@ package app.revanced.manager.compose.di
 
 import app.revanced.manager.compose.domain.repository.ReVancedRepositoryImpl
 import app.revanced.manager.compose.network.api.ManagerAPI
+import app.revanced.manager.compose.patcher.data.repository.*
 import org.koin.core.module.dsl.singleOf
 import org.koin.dsl.module
 
 val repositoryModule = module {
     singleOf(::ReVancedRepositoryImpl)
     singleOf(::ManagerAPI)
+    singleOf(::PatchesRepository)
 }

app/src/main/java/app/revanced/manager/compose/di/ViewModelModule.kt

@@ -2,9 +2,23 @@ package app.revanced.manager.compose.di
 
 import app.revanced.manager.compose.ui.viewmodel.*
 import org.koin.androidx.viewmodel.dsl.viewModelOf
+import org.koin.androidx.viewmodel.dsl.viewModel
 import org.koin.dsl.module
 
 val viewModelModule = module {
-    viewModelOf(::PatchesSelectorViewModel)
+    viewModel {
+        PatchesSelectorViewModel(
+            packageInfo = it.get(),
+            patchesRepository = get()
+        )
+    }
     viewModelOf(::SettingsViewModel)
-}
+    viewModelOf(::AppSelectorViewModel)
+    viewModel {
+        InstallerScreenViewModel(
+            input = it.get(),
+            selectedPatches = it.get(),
+            app = get()
+        )
+    }
+}

app/src/main/java/app/revanced/manager/compose/di/WorkerModule.kt

@@ -0,0 +1,9 @@
+package app.revanced.manager.compose.di
+
+import app.revanced.manager.compose.patcher.worker.PatcherWorker
+import org.koin.androidx.workmanager.dsl.workerOf
+import org.koin.dsl.module
+
+val workerModule = module {
+    workerOf(::PatcherWorker)
+}

app/src/main/java/app/revanced/manager/compose/network/api/ManagerAPI.kt

@@ -34,28 +34,36 @@ class ManagerAPI(
         downloadProgress = null
     }
 
-    suspend fun downloadPatchBundle() {
+    suspend fun downloadPatchBundle(): File? {
         try {
             val downloadUrl = revancedRepository.findAsset(ghPatches, ".jar").downloadUrl
             val patchesFile = app.filesDir.resolve("patch-bundles").also { it.mkdirs() }
                 .resolve("patchbundle.jar")
             downloadAsset(downloadUrl, patchesFile)
+
+            return patchesFile
         } catch (e: Exception) {
             Log.e(tag, "Failed to download patch bundle", e)
             app.toast("Failed to download patch bundle")
         }
+
+        return null
     }
 
-    suspend fun downloadIntegrations() {
+    suspend fun downloadIntegrations(): File? {
         try {
             val downloadUrl = revancedRepository.findAsset(ghIntegrations, ".apk").downloadUrl
             val integrationsFile = app.filesDir.resolve("integrations").also { it.mkdirs() }
                 .resolve("integrations.apk")
             downloadAsset(downloadUrl, integrationsFile)
+
+            return integrationsFile
         } catch (e: Exception) {
             Log.e(tag, "Failed to download integrations", e)
             app.toast("Failed to download integrations")
         }
+
+        return null
     }
 }
 

app/src/main/java/app/revanced/manager/compose/patcher/Aligning.kt

@@ -0,0 +1,38 @@
+package app.revanced.manager.compose.patcher
+
+import app.revanced.manager.compose.patcher.alignment.ZipAligner
+import app.revanced.manager.compose.patcher.alignment.zip.ZipFile
+import app.revanced.manager.compose.patcher.alignment.zip.structures.ZipEntry
+import app.revanced.patcher.PatcherResult
+import java.io.File
+
+// This is the same aligner used by the CLI.
+// It will be removed eventually.
+object Aligning {
+    fun align(result: PatcherResult, inputFile: File, outputFile: File) {
+        // logger.info("Aligning ${inputFile.name} to ${outputFile.name}")
+
+        if (outputFile.exists()) outputFile.delete()
+
+        ZipFile(outputFile).use { file ->
+            result.dexFiles.forEach {
+                file.addEntryCompressData(
+                    ZipEntry.createWithName(it.name),
+                    it.stream.readBytes()
+                )
+            }
+
+            result.resourceFile?.let {
+                file.copyEntriesFromFileAligned(
+                    ZipFile(it),
+                    ZipAligner::getEntryAlignment
+                )
+            }
+
+            file.copyEntriesFromFileAligned(
+                ZipFile(inputFile),
+                ZipAligner::getEntryAlignment
+            )
+        }
+    }
+}

app/src/main/java/app/revanced/manager/compose/patcher/Session.kt

@@ -0,0 +1,100 @@
+package app.revanced.manager.compose.patcher
+
+import app.revanced.patcher.Patcher
+import app.revanced.patcher.PatcherOptions
+import app.revanced.patcher.logging.Logger
+import android.util.Log
+import app.revanced.manager.compose.patcher.worker.Progress
+import app.revanced.patcher.data.Context
+import app.revanced.patcher.patch.Patch
+import java.io.Closeable
+import java.io.File
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
+
+internal typealias PatchClass = Class<out Patch<Context>>
+internal typealias PatchList = List<PatchClass>
+
+class Session(
+    cacheDir: String,
+    frameworkDir: String,
+    aaptPath: String,
+    private val input: File,
+    private val onProgress: suspend (Progress) -> Unit = { }
+) : Closeable {
+    class PatchFailedException(val patchName: String, cause: Throwable?) : Exception("Got exception while executing $patchName", cause)
+
+    private val logger = LogcatLogger
+    private val temporary = File(cacheDir).resolve("manager").also { it.mkdirs() }
+    private val patcher = Patcher(
+        PatcherOptions(
+            inputFile = input,
+            resourceCacheDirectory = temporary.resolve("aapt-resources").path,
+            frameworkFolderLocation = frameworkDir,
+            aaptPath = aaptPath,
+            logger = logger,
+        )
+    )
+
+    private suspend fun Patcher.applyPatchesVerbose() {
+        this.executePatches(true).forEach { (patch, result) ->
+            if (result.isSuccess) {
+                logger.info("$patch succeeded")
+                onProgress(Progress.PatchSuccess(patch))
+                return@forEach
+            }
+            logger.error("$patch failed:")
+            result.exceptionOrNull()!!.printStackTrace()
+
+            throw PatchFailedException(patch, result.exceptionOrNull())
+        }
+    }
+
+    suspend fun run(output: File, selectedPatches: PatchList, integrations: List<File>) {
+        onProgress(Progress.Merging)
+
+        with(patcher) {
+            logger.info("Merging integrations")
+            addIntegrations(integrations) {}
+            addPatches(selectedPatches)
+
+            logger.info("Applying patches...")
+            onProgress(Progress.PatchingStart)
+
+            applyPatchesVerbose()
+        }
+
+        onProgress(Progress.Saving)
+        logger.info("Writing patched files...")
+        val result = patcher.save()
+
+        val aligned = temporary.resolve("aligned.apk").also { Aligning.align(result, input, it) }
+
+        logger.info("Patched apk saved to $aligned")
+
+        Files.move(aligned.toPath(), output.toPath(), StandardCopyOption.REPLACE_EXISTING)
+    }
+
+    override fun close() {
+        temporary.delete()
+    }
+}
+
+private object LogcatLogger : Logger {
+    private const val tag = "revanced-patcher"
+    override fun error(msg: String) {
+        Log.e(tag, msg)
+    }
+
+    override fun warn(msg: String) {
+        Log.w(tag, msg)
+    }
+
+    override fun info(msg: String) {
+        Log.i(tag, msg)
+    }
+
+    override fun trace(msg: String) {
+        Log.v(tag, msg)
+    }
+}

app/src/main/java/app/revanced/manager/compose/patcher/aapt/Aapt.kt

@@ -0,0 +1,13 @@
+package app.revanced.manager.compose.patcher.aapt
+
+import android.content.Context
+import java.io.File
+
+object Aapt {
+    fun binary(context: Context): File? {
+        return File(context.applicationInfo.nativeLibraryDir).resolveAapt()
+    }
+}
+
+private fun File.resolveAapt() =
+    list { _, f -> !File(f).isDirectory && f.contains("aapt") }?.firstOrNull()?.let { resolve(it) }

app/src/main/java/app/revanced/manager/compose/patcher/alignment/ZipAlign.kt

@@ -0,0 +1,11 @@
+package app.revanced.manager.compose.patcher.alignment
+
+import app.revanced.manager.compose.patcher.alignment.zip.structures.ZipEntry
+
+internal object ZipAligner {
+    private const val DEFAULT_ALIGNMENT = 4
+    private const val LIBRARY_ALIGNMENT = 4096
+
+    fun getEntryAlignment(entry: ZipEntry): Int? =
+        if (entry.compression.toUInt() != 0u) null else if (entry.fileName.endsWith(".so")) LIBRARY_ALIGNMENT else DEFAULT_ALIGNMENT
+}

app/src/main/java/app/revanced/manager/compose/patcher/alignment/zip/Extensions.kt

@@ -0,0 +1,33 @@
+package app.revanced.manager.compose.patcher.alignment.zip
+
+import java.io.DataInput
+import java.io.DataOutput
+import java.nio.ByteBuffer
+
+fun UInt.toLittleEndian() =
+    (((this.toInt() and 0xff000000.toInt()) shr 24) or ((this.toInt() and 0x00ff0000) shr 8) or ((this.toInt() and 0x0000ff00) shl 8) or (this.toInt() shl 24)).toUInt()
+
+fun UShort.toLittleEndian() = (this.toUInt() shl 16).toLittleEndian().toUShort()
+
+fun UInt.toBigEndian() = (((this.toInt() and 0xff) shl 24) or ((this.toInt() and 0xff00) shl 8)
+        or ((this.toInt() and 0x00ff0000) ushr 8) or (this.toInt() ushr 24)).toUInt()
+
+fun UShort.toBigEndian() = (this.toUInt() shl 16).toBigEndian().toUShort()
+
+fun ByteBuffer.getUShort() = this.getShort().toUShort()
+fun ByteBuffer.getUInt() = this.getInt().toUInt()
+
+fun ByteBuffer.putUShort(ushort: UShort) = this.putShort(ushort.toShort())
+fun ByteBuffer.putUInt(uint: UInt) = this.putInt(uint.toInt())
+
+fun DataInput.readUShort() = this.readShort().toUShort()
+fun DataInput.readUInt() = this.readInt().toUInt()
+
+fun DataOutput.writeUShort(ushort: UShort) = this.writeShort(ushort.toInt())
+fun DataOutput.writeUInt(uint: UInt) = this.writeInt(uint.toInt())
+
+fun DataInput.readUShortLE() = this.readUShort().toBigEndian()
+fun DataInput.readUIntLE() = this.readUInt().toBigEndian()
+
+fun DataOutput.writeUShortLE(ushort: UShort) = this.writeUShort(ushort.toLittleEndian())
+fun DataOutput.writeUIntLE(uint: UInt) = this.writeUInt(uint.toLittleEndian())

app/src/main/java/app/revanced/manager/compose/patcher/alignment/zip/ZipFile.kt

@@ -0,0 +1,177 @@
+package app.revanced.manager.compose.patcher.alignment.zip
+
+import app.revanced.manager.compose.patcher.alignment.zip.structures.ZipEndRecord
+import app.revanced.manager.compose.patcher.alignment.zip.structures.ZipEntry
+
+import java.io.Closeable
+import java.io.File
+import java.io.RandomAccessFile
+import java.nio.ByteBuffer
+import java.nio.channels.FileChannel
+import java.util.zip.CRC32
+import java.util.zip.Deflater
+
+class ZipFile(file: File) : Closeable {
+    var entries: MutableList<ZipEntry> = mutableListOf()
+
+    private val filePointer: RandomAccessFile = RandomAccessFile(file, "rw")
+    private var CDNeedsRewrite = false
+
+    private val compressionLevel = 5
+
+    init {
+        //if file isn't empty try to load entries
+        if (file.length() > 0) {
+            val endRecord = findEndRecord()
+
+            if (endRecord.diskNumber > 0u || endRecord.totalEntries != endRecord.diskEntries)
+                throw IllegalArgumentException("Multi-file archives are not supported")
+
+            entries = readEntries(endRecord).toMutableList()
+        }
+
+        //seek back to start for writing
+        filePointer.seek(0)
+    }
+
+    private fun findEndRecord(): ZipEndRecord {
+        //look from end to start since end record is at the end
+        for (i in filePointer.length() - 1 downTo 0) {
+            filePointer.seek(i)
+            //possible beginning of signature
+            if (filePointer.readByte() == 0x50.toByte()) {
+                //seek back to get the full int
+                filePointer.seek(i)
+                val possibleSignature = filePointer.readUIntLE()
+                if (possibleSignature == ZipEndRecord.ECD_SIGNATURE) {
+                    filePointer.seek(i)
+                    return ZipEndRecord.fromECD(filePointer)
+                }
+            }
+        }
+
+        throw Exception("Couldn't find end record")
+    }
+
+    private fun readEntries(endRecord: ZipEndRecord): List<ZipEntry> {
+        filePointer.seek(endRecord.centralDirectoryStartOffset.toLong())
+
+        val numberOfEntries = endRecord.diskEntries.toInt()
+
+        return buildList(numberOfEntries) {
+            for (i in 1..numberOfEntries) {
+                add(
+                    ZipEntry.fromCDE(filePointer).also
+                    {
+                        //for some reason the local extra field can be different from the central one
+                        it.readLocalExtra(
+                            filePointer.channel.map(
+                                FileChannel.MapMode.READ_ONLY,
+                                it.localHeaderOffset.toLong() + 28,
+                                2
+                            )
+                        )
+                    })
+            }
+        }
+    }
+
+    private fun writeCD() {
+        val CDStart = filePointer.channel.position().toUInt()
+
+        entries.forEach {
+            filePointer.channel.write(it.toCDE())
+        }
+
+        val entriesCount = entries.size.toUShort()
+
+        val endRecord = ZipEndRecord(
+            0u,
+            0u,
+            entriesCount,
+            entriesCount,
+            filePointer.channel.position().toUInt() - CDStart,
+            CDStart,
+            ""
+        )
+
+        filePointer.channel.write(endRecord.toECD())
+    }
+
+    private fun addEntry(entry: ZipEntry, data: ByteBuffer) {
+        CDNeedsRewrite = true
+
+        entry.localHeaderOffset = filePointer.channel.position().toUInt()
+
+        filePointer.channel.write(entry.toLFH())
+        filePointer.channel.write(data)
+
+        entries.add(entry)
+    }
+
+    fun addEntryCompressData(entry: ZipEntry, data: ByteArray) {
+        val compressor = Deflater(compressionLevel, true)
+        compressor.setInput(data)
+        compressor.finish()
+
+        val uncompressedSize = data.size
+        val compressedData =
+            ByteArray(uncompressedSize) //i'm guessing compression won't make the data bigger
+
+        val compressedDataLength = compressor.deflate(compressedData)
+        val compressedBuffer =
+            ByteBuffer.wrap(compressedData.take(compressedDataLength).toByteArray())
+
+        compressor.end()
+
+        val crc = CRC32()
+        crc.update(data)
+
+        entry.compression = 8u //deflate compression
+        entry.uncompressedSize = uncompressedSize.toUInt()
+        entry.compressedSize = compressedDataLength.toUInt()
+        entry.crc32 = crc.value.toUInt()
+
+        addEntry(entry, compressedBuffer)
+    }
+
+    private fun addEntryCopyData(entry: ZipEntry, data: ByteBuffer, alignment: Int? = null) {
+        alignment?.let {
+            //calculate where data would end up
+            val dataOffset = filePointer.filePointer + entry.LFHSize
+
+            val mod = dataOffset % alignment
+
+            //wrong alignment
+            if (mod != 0L) {
+                //add padding at end of extra field
+                entry.localExtraField =
+                    entry.localExtraField.copyOf((entry.localExtraField.size + (alignment - mod)).toInt())
+            }
+        }
+
+        addEntry(entry, data)
+    }
+
+    fun getDataForEntry(entry: ZipEntry): ByteBuffer {
+        return filePointer.channel.map(
+            FileChannel.MapMode.READ_ONLY,
+            entry.dataOffset.toLong(),
+            entry.compressedSize.toLong()
+        )
+    }
+
+    fun copyEntriesFromFileAligned(file: ZipFile, entryAlignment: (entry: ZipEntry) -> Int?) {
+        for (entry in file.entries) {
+            if (entries.any { it.fileName == entry.fileName }) continue //don't add duplicates
+
+            val data = file.getDataForEntry(entry)
+            addEntryCopyData(entry, data, entryAlignment(entry))
+        }
+    }
+
+    override fun close() {
+        if (CDNeedsRewrite) writeCD()
+        filePointer.close()
+    }
+}

app/src/main/java/app/revanced/manager/compose/patcher/alignment/zip/structures/ZipEndRecord.kt

@@ -0,0 +1,74 @@
+package app.revanced.manager.compose.patcher.alignment.zip.structures
+
+import app.revanced.manager.compose.patcher.alignment.zip.*
+import java.io.DataInput
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+data class ZipEndRecord(
+    val diskNumber: UShort,
+    val startingDiskNumber: UShort,
+    val diskEntries: UShort,
+    val totalEntries: UShort,
+    val centralDirectorySize: UInt,
+    val centralDirectoryStartOffset: UInt,
+    val fileComment: String,
+) {
+
+    companion object {
+        const val ECD_HEADER_SIZE = 22
+        const val ECD_SIGNATURE = 0x06054b50u
+
+        fun fromECD(input: DataInput): ZipEndRecord {
+            val signature = input.readUIntLE()
+
+            if (signature != ECD_SIGNATURE)
+                throw IllegalArgumentException("Input doesn't start with end record signature")
+
+            val diskNumber = input.readUShortLE()
+            val startingDiskNumber = input.readUShortLE()
+            val diskEntries = input.readUShortLE()
+            val totalEntries = input.readUShortLE()
+            val centralDirectorySize = input.readUIntLE()
+            val centralDirectoryStartOffset = input.readUIntLE()
+            val fileCommentLength = input.readUShortLE()
+            var fileComment = ""
+
+            if (fileCommentLength > 0u) {
+                val fileCommentBytes = ByteArray(fileCommentLength.toInt())
+                input.readFully(fileCommentBytes)
+                fileComment = fileCommentBytes.toString(Charsets.UTF_8)
+            }
+
+            return ZipEndRecord(
+                diskNumber,
+                startingDiskNumber,
+                diskEntries,
+                totalEntries,
+                centralDirectorySize,
+                centralDirectoryStartOffset,
+                fileComment
+            )
+        }
+    }
+
+    fun toECD(): ByteBuffer {
+        val commentBytes = fileComment.toByteArray(Charsets.UTF_8)
+
+        val buffer = ByteBuffer.allocate(ECD_HEADER_SIZE + commentBytes.size).also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(ECD_SIGNATURE)
+        buffer.putUShort(diskNumber)
+        buffer.putUShort(startingDiskNumber)
+        buffer.putUShort(diskEntries)
+        buffer.putUShort(totalEntries)
+        buffer.putUInt(centralDirectorySize)
+        buffer.putUInt(centralDirectoryStartOffset)
+        buffer.putUShort(commentBytes.size.toUShort())
+
+        buffer.put(commentBytes)
+
+        buffer.flip()
+        return buffer
+    }
+}

app/src/main/java/app/revanced/manager/compose/patcher/alignment/zip/structures/ZipEntry.kt

@@ -0,0 +1,189 @@
+package app.revanced.manager.compose.patcher.alignment.zip.structures
+
+import app.revanced.manager.compose.patcher.alignment.zip.*
+import java.io.DataInput
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+data class ZipEntry(
+    val version: UShort,
+    val versionNeeded: UShort,
+    val flags: UShort,
+    var compression: UShort,
+    val modificationTime: UShort,
+    val modificationDate: UShort,
+    var crc32: UInt,
+    var compressedSize: UInt,
+    var uncompressedSize: UInt,
+    val diskNumber: UShort,
+    val internalAttributes: UShort,
+    val externalAttributes: UInt,
+    var localHeaderOffset: UInt,
+    val fileName: String,
+    val extraField: ByteArray,
+    val fileComment: String,
+    var localExtraField: ByteArray = ByteArray(0), //separate for alignment
+) {
+    val LFHSize: Int
+        get() = LFH_HEADER_SIZE + fileName.toByteArray(Charsets.UTF_8).size + localExtraField.size
+
+    val dataOffset: UInt
+        get() = localHeaderOffset + LFHSize.toUInt()
+
+    companion object {
+        const val CDE_HEADER_SIZE = 46
+        const val CDE_SIGNATURE = 0x02014b50u
+
+        const val LFH_HEADER_SIZE = 30
+        const val LFH_SIGNATURE = 0x04034b50u
+
+        fun createWithName(fileName: String): ZipEntry {
+            return ZipEntry(
+                0x1403u, //made by unix, version 20
+                0u,
+                0u,
+                0u,
+                0x0821u, //seems to be static time google uses, no idea
+                0x0221u, //same as above
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                0u,
+                fileName,
+                ByteArray(0),
+                ""
+            )
+        }
+
+        fun fromCDE(input: DataInput): ZipEntry {
+            val signature = input.readUIntLE()
+
+            if (signature != CDE_SIGNATURE)
+                throw IllegalArgumentException("Input doesn't start with central directory entry signature")
+
+            val version = input.readUShortLE()
+            val versionNeeded = input.readUShortLE()
+            var flags = input.readUShortLE()
+            val compression = input.readUShortLE()
+            val modificationTime = input.readUShortLE()
+            val modificationDate = input.readUShortLE()
+            val crc32 = input.readUIntLE()
+            val compressedSize = input.readUIntLE()
+            val uncompressedSize = input.readUIntLE()
+            val fileNameLength = input.readUShortLE()
+            var fileName = ""
+            val extraFieldLength = input.readUShortLE()
+            val extraField = ByteArray(extraFieldLength.toInt())
+            val fileCommentLength = input.readUShortLE()
+            var fileComment = ""
+            val diskNumber = input.readUShortLE()
+            val internalAttributes = input.readUShortLE()
+            val externalAttributes = input.readUIntLE()
+            val localHeaderOffset = input.readUIntLE()
+
+            val variableFieldsLength =
+                fileNameLength.toInt() + extraFieldLength.toInt() + fileCommentLength.toInt()
+
+            if (variableFieldsLength > 0) {
+                val fileNameBytes = ByteArray(fileNameLength.toInt())
+                input.readFully(fileNameBytes)
+                fileName = fileNameBytes.toString(Charsets.UTF_8)
+
+                input.readFully(extraField)
+
+                val fileCommentBytes = ByteArray(fileCommentLength.toInt())
+                input.readFully(fileCommentBytes)
+                fileComment = fileCommentBytes.toString(Charsets.UTF_8)
+            }
+
+            flags = (flags and 0b1000u.inv()
+                .toUShort()) //disable data descriptor flag as they are not used
+
+            return ZipEntry(
+                version,
+                versionNeeded,
+                flags,
+                compression,
+                modificationTime,
+                modificationDate,
+                crc32,
+                compressedSize,
+                uncompressedSize,
+                diskNumber,
+                internalAttributes,
+                externalAttributes,
+                localHeaderOffset,
+                fileName,
+                extraField,
+                fileComment,
+            )
+        }
+    }
+
+    fun readLocalExtra(buffer: ByteBuffer) {
+        buffer.order(ByteOrder.LITTLE_ENDIAN)
+        localExtraField = ByteArray(buffer.getUShort().toInt())
+    }
+
+    fun toLFH(): ByteBuffer {
+        val nameBytes = fileName.toByteArray(Charsets.UTF_8)
+
+        val buffer = ByteBuffer.allocate(LFH_HEADER_SIZE + nameBytes.size + localExtraField.size)
+            .also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(LFH_SIGNATURE)
+        buffer.putUShort(versionNeeded)
+        buffer.putUShort(flags)
+        buffer.putUShort(compression)
+        buffer.putUShort(modificationTime)
+        buffer.putUShort(modificationDate)
+        buffer.putUInt(crc32)
+        buffer.putUInt(compressedSize)
+        buffer.putUInt(uncompressedSize)
+        buffer.putUShort(nameBytes.size.toUShort())
+        buffer.putUShort(localExtraField.size.toUShort())
+
+        buffer.put(nameBytes)
+        buffer.put(localExtraField)
+
+        buffer.flip()
+        return buffer
+    }
+
+    fun toCDE(): ByteBuffer {
+        val nameBytes = fileName.toByteArray(Charsets.UTF_8)
+        val commentBytes = fileComment.toByteArray(Charsets.UTF_8)
+
+        val buffer =
+            ByteBuffer.allocate(CDE_HEADER_SIZE + nameBytes.size + extraField.size + commentBytes.size)
+                .also { it.order(ByteOrder.LITTLE_ENDIAN) }
+
+        buffer.putUInt(CDE_SIGNATURE)
+        buffer.putUShort(version)
+        buffer.putUShort(versionNeeded)
+        buffer.putUShort(flags)
+        buffer.putUShort(compression)
+        buffer.putUShort(modificationTime)
+        buffer.putUShort(modificationDate)
+        buffer.putUInt(crc32)
+        buffer.putUInt(compressedSize)
+        buffer.putUInt(uncompressedSize)
+        buffer.putUShort(nameBytes.size.toUShort())
+        buffer.putUShort(extraField.size.toUShort())
+        buffer.putUShort(commentBytes.size.toUShort())
+        buffer.putUShort(diskNumber)
+        buffer.putUShort(internalAttributes)
+        buffer.putUInt(externalAttributes)
+        buffer.putUInt(localHeaderOffset)
+
+        buffer.put(nameBytes)
+        buffer.put(extraField)
+        buffer.put(commentBytes)
+
+        buffer.flip()
+        return buffer
+    }
+}

app/src/main/java/app/revanced/manager/compose/patcher/data/PatchBundle.kt

@@ -0,0 +1,40 @@
+package app.revanced.manager.compose.patcher.data
+
+import app.revanced.manager.compose.patcher.PatchClass
+import app.revanced.patcher.Patcher
+import app.revanced.patcher.extensions.PatchExtensions.compatiblePackages
+import app.revanced.patcher.util.patch.PatchBundle
+import dalvik.system.PathClassLoader
+import java.io.File
+
+class PatchBundle(private val loader: Iterable<PatchClass>, val integrations: File?) {
+    constructor(bundleJar: String, integrations: File?) : this(
+        object : Iterable<PatchClass> {
+            private val bundle = PatchBundle.Dex(
+                bundleJar,
+                PathClassLoader(bundleJar, Patcher::class.java.classLoader)
+            )
+
+            override fun iterator() = bundle.loadPatches().iterator()
+        },
+        integrations
+    )
+
+    /**
+     * @return A list of patches that are compatible with this Apk.
+     */
+    fun loadPatchesFiltered(packageName: String) = loader.filter { patch ->
+        val compatiblePackages = patch.compatiblePackages
+            ?: // The patch has no compatibility constraints, which means it is universal.
+            return@filter true
+
+        if (!compatiblePackages.any { it.name == packageName }) {
+            // Patch is not compatible with this package.
+            return@filter false
+        }
+
+        true
+    }
+
+    fun loadAllPatches() = loader.toList()
+}

app/src/main/java/app/revanced/manager/compose/patcher/data/repository/PatchesRepository.kt

@@ -0,0 +1,43 @@
+package app.revanced.manager.compose.patcher.data.repository
+
+import app.revanced.manager.compose.network.api.ManagerAPI
+import app.revanced.manager.compose.patcher.data.PatchBundle
+import app.revanced.manager.compose.patcher.patch.PatchInfo
+import kotlinx.coroutines.*
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+
+class PatchesRepository(private val managerAPI: ManagerAPI) {
+    private val patchInformation = MutableSharedFlow<List<PatchInfo>>(replay = 1, onBufferOverflow = BufferOverflow.DROP_OLDEST)
+    private var bundle: PatchBundle? = null
+
+    private val scope = CoroutineScope(Job() + Dispatchers.IO)
+
+    /**
+     * Load a new bundle and update state associated with it.
+     */
+    private suspend fun loadNewBundle(new: PatchBundle) {
+        bundle = new
+        withContext(Dispatchers.Main) {
+            patchInformation.emit(new.loadAllPatches().map { PatchInfo(it) })
+        }
+    }
+
+    /**
+     * Get the [PatchBundle], loading it if needed.
+     */
+    private suspend fun getBundle() = bundle ?: PatchBundle(
+        managerAPI.downloadPatchBundle()!!.absolutePath,
+        managerAPI.downloadIntegrations()
+    ).also {
+        loadNewBundle(it)
+    }
+
+    suspend fun loadPatchClassesFiltered(packageName: String) =
+        getBundle().loadPatchesFiltered(packageName)
+
+    fun getPatchInformation() = patchInformation.asSharedFlow().also { scope.launch { getBundle() } }
+
+    suspend fun getIntegrations() = listOfNotNull(getBundle().integrations)
+}

app/src/main/java/app/revanced/manager/compose/patcher/patch/PatchInfo.kt

@@ -0,0 +1,46 @@
+package app.revanced.manager.compose.patcher.patch
+
+import android.os.Parcelable
+import app.revanced.manager.compose.patcher.PatchClass
+import app.revanced.patcher.annotation.Package
+import app.revanced.patcher.extensions.PatchExtensions.compatiblePackages
+import app.revanced.patcher.extensions.PatchExtensions.dependencies
+import app.revanced.patcher.extensions.PatchExtensions.description
+import app.revanced.patcher.extensions.PatchExtensions.include
+import app.revanced.patcher.extensions.PatchExtensions.options
+import app.revanced.patcher.extensions.PatchExtensions.patchName
+import app.revanced.patcher.patch.PatchOption
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class PatchInfo(
+    val name: String,
+    val description: String?,
+    val dependencies: List<String>?,
+    val include: Boolean,
+    val compatiblePackages: List<CompatiblePackage>?,
+    val options: List<Option>?
+) : Parcelable {
+    constructor(patch: PatchClass) : this(
+        patch.patchName,
+        patch.description,
+        patch.dependencies?.map { it.java.patchName },
+        patch.include,
+        patch.compatiblePackages?.map { CompatiblePackage(it) },
+        patch.options?.map { Option(it) })
+
+    fun compatibleWith(packageName: String) = compatiblePackages?.any { it.name == packageName } ?: true
+
+    fun supportsVersion(versionName: String) =
+        compatiblePackages?.any { compatiblePackages.any { it.versions.isEmpty() || it.versions.any { version -> version == versionName } } } ?: true
+}
+
+@Parcelize
+data class CompatiblePackage(val name: String, val versions: List<String>) : Parcelable {
+    constructor(pkg: Package) : this(pkg.name, pkg.versions.toList())
+}
+
+@Parcelize
+data class Option(val title: String, val key: String, val description: String, val required: Boolean) : Parcelable {
+    constructor(option: PatchOption<*>) : this(option.title, option.key, option.description, option.required)
+}

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

@@ -0,0 +1,140 @@
+package app.revanced.manager.compose.patcher.worker
+
+import android.content.Context
+import androidx.annotation.StringRes
+import androidx.work.Data
+import androidx.work.workDataOf
+import app.revanced.manager.compose.R
+import app.revanced.manager.compose.patcher.Session
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+
+sealed class Progress {
+    object Unpacking : Progress()
+    object Merging : Progress()
+    object PatchingStart : Progress()
+
+    data class PatchSuccess(val patchName: String) : Progress()
+
+    object Saving : Progress()
+}
+
+@Serializable
+enum class StepStatus {
+    WAITING,
+    COMPLETED,
+    FAILURE,
+}
+
+@Serializable
+class Step(val name: String, val status: StepStatus = StepStatus.WAITING)
+
+@Serializable
+class StepGroup(@StringRes val name: Int, val steps: List<Step>, val status: StepStatus = StepStatus.WAITING)
+
+class PatcherProgressManager(context: Context, selectedPatches: List<String>) {
+    val stepGroups = generateGroupsList(context, selectedPatches)
+
+    companion object {
+        private const val PATCHES = 1
+        private const val WORK_DATA_KEY = "progress"
+
+        /**
+         * A map of [Session.Progress] to the corresponding position in [stepGroups]
+         */
+        private val stepKeyMap = mapOf(
+            Progress.Unpacking to StepKey(0, 0),
+            Progress.Merging to StepKey(0, 1),
+            Progress.PatchingStart to StepKey(PATCHES, 0),
+            Progress.Saving to StepKey(2, 0),
+        )
+
+        fun generateGroupsList(context: Context, selectedPatches: List<String>) = mutableListOf(
+            StepGroup(
+                R.string.patcher_step_group_prepare,
+                listOf(
+                    Step(context.getString(R.string.patcher_step_unpack)),
+                    Step(context.getString(R.string.patcher_step_integrations))
+                )
+            ),
+            StepGroup(
+                R.string.patcher_step_group_patching,
+                selectedPatches.map { Step(it) }
+            ),
+            StepGroup(
+                R.string.patcher_step_group_saving,
+                listOf(Step(context.getString(R.string.patcher_step_write_patched)))
+            )
+        )
+
+        fun groupsFromWorkData(workData: Data) = workData.getString(WORK_DATA_KEY)
+            ?.let { Json.decodeFromString<List<StepGroup>>(it) }
+    }
+
+    fun groupsToWorkData() = workDataOf(WORK_DATA_KEY to Json.Default.encodeToString(stepGroups))
+
+    private var currentStep: StepKey? = null
+
+    private fun <T> MutableList<T>.mutateIndex(index: Int, callback: (T) -> T) = apply {
+        this[index] = callback(this[index])
+    }
+
+    private fun updateStepStatus(key: StepKey, newStatus: StepStatus) {
+        var isLastStepOfGroup = false
+        stepGroups.mutateIndex(key.groupIndex) { group ->
+            isLastStepOfGroup = key.stepIndex == group.steps.size - 1
+            val newGroupStatus = when {
+                // This group failed if a step in it failed.
+                newStatus == StepStatus.FAILURE -> StepStatus.FAILURE
+                // All steps in the group succeeded.
+                newStatus == StepStatus.COMPLETED && isLastStepOfGroup -> StepStatus.COMPLETED
+                // Keep the old status.
+                else -> group.status
+            }
+
+            StepGroup(group.name, group.steps.toMutableList().mutateIndex(key.stepIndex) { step ->
+                Step(step.name, newStatus)
+            }, newGroupStatus)
+        }
+
+        val isFinalStep = isLastStepOfGroup && key.groupIndex == stepGroups.size - 1
+
+        if (newStatus == StepStatus.COMPLETED) {
+            // Move the cursor to the next step.
+            currentStep = when {
+                isFinalStep -> null // Final step has been completed.
+                isLastStepOfGroup -> StepKey(key.groupIndex + 1, 0) // Move to the next group.
+                else -> StepKey(key.groupIndex, key.stepIndex + 1) // Move to the next step of this group.
+            }
+        }
+    }
+
+    private fun setCurrentStepStatus(newStatus: StepStatus) = currentStep?.let { updateStepStatus(it, newStatus) }
+
+    private data class StepKey(val groupIndex: Int, val stepIndex: Int)
+
+    fun handle(progress: Progress) {
+        if (progress is Progress.PatchSuccess) {
+            val patchStepKey = StepKey(
+                PATCHES,
+                stepGroups[PATCHES].steps.indexOfFirst { it.name == progress.patchName })
+
+            updateStepStatus(patchStepKey, StepStatus.COMPLETED)
+        } else {
+            currentStep?.let { updateStepStatus(it, StepStatus.COMPLETED) }
+
+            currentStep = stepKeyMap[progress]!!
+        }
+    }
+
+    fun failure() {
+        // TODO: associate the exception with the step that just failed.
+        setCurrentStepStatus(StepStatus.FAILURE)
+    }
+
+    fun success() {
+        setCurrentStepStatus(StepStatus.COMPLETED)
+    }
+}

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

@@ -0,0 +1,79 @@
+package app.revanced.manager.compose.patcher.worker
+
+import android.content.Context
+import android.util.Log
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+import app.revanced.manager.compose.patcher.data.repository.PatchesRepository
+import app.revanced.manager.compose.patcher.Session
+import app.revanced.manager.compose.patcher.aapt.Aapt
+import app.revanced.patcher.extensions.PatchExtensions.patchName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.json.Json
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+import java.io.File
+import java.io.FileNotFoundException
+
+// TODO: setup wakelock + notification so android doesn't murder us.
+class PatcherWorker(context: Context, parameters: WorkerParameters) : CoroutineWorker(context, parameters),
+    KoinComponent {
+    private val patchesRepository: PatchesRepository by inject()
+
+    @Serializable
+    data class Args(
+        val input: String,
+        val output: String,
+        val selectedPatches: List<String>,
+        val packageName: String,
+        val packageVersion: String
+    )
+
+    companion object {
+        const val ARGS_KEY = "args"
+    }
+
+    override suspend fun doWork(): Result {
+        if (runAttemptCount > 0) {
+            Log.d("revanced-worker", "Android requested retrying but retrying is disabled.")
+            return Result.failure()
+        }
+        val aaptPath =
+            Aapt.binary(applicationContext)?.absolutePath ?: throw FileNotFoundException("Could not resolve aapt.")
+
+        val frameworkPath =
+            applicationContext.cacheDir.resolve("framework").also { it.mkdirs() }.absolutePath
+
+        val args = Json.decodeFromString<Args>(inputData.getString(ARGS_KEY)!!)
+        val selected = args.selectedPatches.toSet()
+
+        val patchList = patchesRepository.loadPatchClassesFiltered(args.packageName)
+            .filter { selected.contains(it.patchName) }
+
+        val progressManager = PatcherProgressManager(applicationContext, args.selectedPatches)
+
+        suspend fun updateProgress(progress: Progress) {
+            progressManager.handle(progress)
+            setProgress(progressManager.groupsToWorkData())
+        }
+
+        updateProgress(Progress.Unpacking)
+
+        return try {
+            Session(applicationContext.cacheDir.path, frameworkPath, aaptPath, File(args.input)) {
+                updateProgress(it)
+            }.use { session ->
+                session.run(File(args.output), patchList, patchesRepository.getIntegrations())
+            }
+
+            Log.i("revanced-worker", "Patching succeeded")
+            progressManager.success()
+            Result.success(progressManager.groupsToWorkData())
+        } catch (e: Throwable) {
+            Log.e("revanced-worker", "Got exception while patching", e)
+            progressManager.failure()
+            Result.failure(progressManager.groupsToWorkData())
+        }
+    }
+}

app/src/main/java/app/revanced/manager/compose/ui/component/PatchItem.kt

@@ -0,0 +1,47 @@
+package app.revanced.manager.compose.ui.component
+
+import androidx.compose.foundation.clickable
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Settings
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import app.revanced.manager.compose.patcher.patch.PatchInfo
+
+@Composable
+fun PatchItem(
+    patch: PatchInfo,
+    onOptionsDialog: () -> Unit,
+    selected: Boolean,
+    onToggle: () -> Unit,
+    supported: Boolean
+) {
+    ListItem(
+        modifier = Modifier
+            .let { if (!supported) it.alpha(0.5f) else it }
+            .clickable(enabled = supported, onClick = onToggle),
+        leadingContent = {
+            Checkbox(
+                checked = selected,
+                onCheckedChange = {
+                    onToggle()
+                },
+                enabled = supported
+            )
+        },
+        headlineContent = {
+            Text(patch.name)
+        },
+        supportingContent = {
+            Text(patch.description ?: "")
+        },
+        trailingContent = {
+            if (patch.options?.isNotEmpty() == true) {
+                IconButton(onClick = onOptionsDialog, enabled = supported) {
+                    Icon(Icons.Outlined.Settings, null)
+                }
+            }
+        }
+    )
+}

app/src/main/java/app/revanced/manager/compose/ui/destination/Destination.kt

@@ -1,7 +1,9 @@
 package app.revanced.manager.compose.ui.destination
 
 import android.os.Parcelable
+import app.revanced.manager.compose.util.PackageInfo
 import kotlinx.parcelize.Parcelize
+import java.io.File
 
 sealed interface Destination: Parcelable {
 
@@ -15,6 +17,8 @@ sealed interface Destination: Parcelable {
     object Settings: Destination
 
     @Parcelize
-    object PatchesSelector: Destination
+    data class PatchesSelector(val input: PackageInfo): Destination
 
+    @Parcelize
+    data class Installer(val input: PackageInfo, val selectedPatches: List<String>) : Destination
 }

app/src/main/java/app/revanced/manager/compose/ui/screen/AppSelectorScreen.kt

@@ -1,5 +1,7 @@
 package app.revanced.manager.compose.ui.screen
 
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
@@ -22,14 +24,22 @@ import app.revanced.manager.compose.R
 import app.revanced.manager.compose.ui.component.AppIcon
 import app.revanced.manager.compose.ui.component.AppTopBar
 import app.revanced.manager.compose.ui.component.LoadingIndicator
+import app.revanced.manager.compose.ui.viewmodel.AppSelectorViewModel
 import app.revanced.manager.compose.util.PM
+import app.revanced.manager.compose.util.PackageInfo
+import org.koin.androidx.compose.getViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AppSelectorScreen(
-    onAppClick: () -> Unit,
-    onBackClick: () -> Unit
+    onAppClick: (PackageInfo) -> Unit,
+    onBackClick: () -> Unit,
+    vm: AppSelectorViewModel = getViewModel()
 ) {
+    val pickApkLauncher = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { apkUri ->
+        vm.loadSelectedFile(apkUri!!).let(onAppClick)
+    }
+
     var filterText by rememberSaveable { mutableStateOf("") }
     var search by rememberSaveable { mutableStateOf(false) }
 
@@ -61,11 +71,11 @@ fun AppSelectorScreen(
                         ) { app ->
 
                             ListItem(
-                                modifier = Modifier.clickable { onAppClick() },
+                                modifier = Modifier.clickable { onAppClick(PackageInfo(app)) },
                                 leadingContent = { AppIcon(app.icon, null, 36) },
                                 headlineContent = { Text(app.label) },
                                 supportingContent = { Text(app.packageName) },
-                                trailingContent = { Text((PM.testList[app.packageName]?: 0).let { if (it == 1) "$it " + stringResource(R.string.patch) else "$it " + stringResource(R.string.patches) }) }
+                                trailingContent = { Text("420 Patches") }
                             )
 
                         }
@@ -106,7 +116,9 @@ fun AppSelectorScreen(
                     item {
 
                         ListItem(
-                            modifier = Modifier.clickable { },
+                            modifier = Modifier.clickable {
+                                pickApkLauncher.launch("*/*")
+                            },
                             leadingContent = { Box(Modifier.size(36.dp), Alignment.Center) { Icon(Icons.Default.Storage, null, modifier = Modifier.size(24.dp)) } },
                             headlineContent = { Text(stringResource(R.string.select_from_storage)) }
                         )
@@ -124,14 +136,12 @@ fun AppSelectorScreen(
                             val app = list[index]
 
                             ListItem(
-                                modifier = Modifier.clickable { onAppClick() },
+                                modifier = Modifier.clickable { onAppClick(PackageInfo(app)) },
                                 leadingContent = { AppIcon(app.icon, null, 36) },
                                 headlineContent = { Text(app.label) },
                                 supportingContent = { Text(app.packageName) },
                                 trailingContent = {
-                                    Text(
-                                        (PM.testList[app.packageName]?: 0).let { if (it == 1) "$it " + stringResource(R.string.patch) else "$it " + stringResource(R.string.patches) }
-                                    )
+                                    Text("420 Patches")
                                 }
                             )
 
@@ -146,7 +156,6 @@ fun AppSelectorScreen(
                         }
                     }
                 }
-
             } else {
                 LoadingIndicator()
             }

app/src/main/java/app/revanced/manager/compose/ui/screen/DashboardScreen.kt

@@ -33,7 +33,6 @@ import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import app.revanced.manager.compose.R
-import app.revanced.manager.compose.ui.component.AppScaffold
 import app.revanced.manager.compose.ui.component.AppTopBar
 import kotlinx.coroutines.launch
 

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

@@ -0,0 +1,50 @@
+package app.revanced.manager.compose.ui.screen
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import app.revanced.manager.compose.ui.component.AppScaffold
+import app.revanced.manager.compose.ui.component.AppTopBar
+import app.revanced.manager.compose.ui.viewmodel.InstallerScreenViewModel
+import app.revanced.manager.compose.R
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun InstallerScreen(
+    vm: InstallerScreenViewModel
+) {
+    AppScaffold(
+        topBar = {
+            AppTopBar(
+                title = stringResource(R.string.installer),
+                onBackClick = { },
+            )
+        }
+    ) { paddingValues ->
+        Column(
+            modifier = Modifier
+                .padding(paddingValues)
+                .fillMaxSize()
+        ) {
+            vm.stepGroups.forEach {
+                Column {
+                    Text(
+                        text = "${stringResource(it.name)}: ${it.status}",
+                        style = MaterialTheme.typography.titleLarge
+                    )
+
+                    it.steps.forEach {
+                        Text(
+                            text = "${it.name}: ${it.status}",
+                            style = MaterialTheme.typography.titleMedium
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/app/revanced/manager/compose/ui/screen/PatchesSelectorScreen.kt

@@ -1,7 +1,6 @@
 package app.revanced.manager.compose.ui.screen
 
 import androidx.compose.foundation.ExperimentalFoundationApi
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -16,15 +15,12 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Build
 import androidx.compose.material.icons.outlined.HelpOutline
 import androidx.compose.material.icons.outlined.Search
-import androidx.compose.material.icons.outlined.Settings
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
-import androidx.compose.material3.Checkbox
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.ExtendedFloatingActionButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
-import androidx.compose.material3.ListItem
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Tab
@@ -34,72 +30,54 @@ import androidx.compose.material3.TextButton
 import androidx.compose.material3.surfaceColorAtElevation
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.rememberCoroutineScope
-import androidx.compose.runtime.saveable.rememberSaveable
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import app.revanced.manager.compose.R
 import app.revanced.manager.compose.ui.component.AppTopBar
 import app.revanced.manager.compose.ui.component.GroupHeader
+import app.revanced.manager.compose.ui.component.PatchItem
 import app.revanced.manager.compose.ui.viewmodel.PatchesSelectorViewModel
 import kotlinx.coroutines.launch
-import org.koin.androidx.compose.getViewModel
-import java.io.File
+
+const val allowUnsupported = false
 
 @OptIn(ExperimentalMaterial3Api::class, ExperimentalFoundationApi::class)
 @Composable
 fun PatchesSelectorScreen(
-    selectedApp: List<File>? = null,
-    onBackClick: () -> Unit,
-    viewModel: PatchesSelectorViewModel = getViewModel()
+    startPatching: (List<String>) -> Unit, onBackClick: () -> Unit, vm: PatchesSelectorViewModel
 ) {
     val pagerState = rememberPagerState()
     val coroutineScope = rememberCoroutineScope()
 
-    var showOptionsDialog by rememberSaveable { mutableStateOf(false) }
-    var showUnsupportedDialog by rememberSaveable { mutableStateOf(false) }
+    val bundles by vm.bundlesFlow.collectAsStateWithLifecycle(initialValue = emptyList())
 
-    if (showUnsupportedDialog)
-        UnsupportedDialog(onDismissRequest = { showUnsupportedDialog = false })
+    if (vm.showUnsupportedDialog) UnsupportedDialog(onDismissRequest = vm::dismissDialogs)
 
-    if (showOptionsDialog)
-        OptionsDialog(
-            onDismissRequest = { showOptionsDialog = false },
-            onConfirm = {}
-        )
+    if (vm.showOptionsDialog) OptionsDialog(onDismissRequest = vm::dismissDialogs, onConfirm = {})
 
-    Scaffold(
-        topBar = {
-            AppTopBar(
-                title = stringResource(R.string.select_patches),
-                onBackClick = onBackClick,
-                actions = {
-                    IconButton(onClick = {  }) {
-                        Icon(Icons.Outlined.HelpOutline, stringResource(R.string.help))
-                    }
-                    IconButton(onClick = {  }) {
-                        Icon(Icons.Outlined.Search, stringResource(R.string.search))
-                    }
-                }
-            )
-        },
-        floatingActionButton = {
-            ExtendedFloatingActionButton(
-                text = { Text(stringResource(R.string.patch)) },
-                icon = { Icon(Icons.Default.Build, null) },
-                onClick = { /*TODO*/ })
-        }
-    ) { paddingValues ->
+    Scaffold(topBar = {
+        AppTopBar(title = stringResource(R.string.select_patches), onBackClick = onBackClick, actions = {
+            IconButton(onClick = { }) {
+                Icon(Icons.Outlined.HelpOutline, stringResource(R.string.help))
+            }
+            IconButton(onClick = { }) {
+                Icon(Icons.Outlined.Search, stringResource(R.string.search))
+            }
+        })
+    }, floatingActionButton = {
+        ExtendedFloatingActionButton(text = { Text(stringResource(R.string.patch)) },
+            icon = { Icon(Icons.Default.Build, null) },
+            onClick = { startPatching(vm.selectedPatches) })
+    }) { paddingValues ->
         Column(Modifier.fillMaxSize().padding(paddingValues)) {
             TabRow(
                 selectedTabIndex = pagerState.currentPage,
                 containerColor = MaterialTheme.colorScheme.surfaceColorAtElevation(3.0.dp)
             ) {
-                viewModel.bundles.forEachIndexed { index, bundle ->
+                bundles.forEachIndexed { index, bundle ->
                     Tab(
                         selected = pagerState.currentPage == index,
                         onClick = { coroutineScope.launch { pagerState.animateScrollToPage(index) } },
@@ -111,68 +89,40 @@ fun PatchesSelectorScreen(
             }
 
             HorizontalPager(
-                pageCount = viewModel.bundles.size,
+                pageCount = bundles.size,
                 state = pagerState,
                 userScrollEnabled = true,
                 pageContent = { index ->
 
-                    val patches = rememberSaveable { viewModel.bundles[index].patches }
+                    val bundle = bundles[index]
 
                     LazyColumn(
-                        modifier = Modifier
-                            .fillMaxSize()
+                        modifier = Modifier.fillMaxSize()
                     ) {
                         items(
-                            items = patches["supported"]!!
+                            items = bundle.supported
                         ) { patch ->
-                            ListItem(
-                                modifier = Modifier.clickable {
-                                    if (viewModel.selectedPatches.contains(patch))
-                                        viewModel.selectedPatches.remove(patch)
-                                    else
-                                        viewModel.selectedPatches.add(patch)
+                            PatchItem(
+                                patch = patch,
+                                onOptionsDialog = vm::openOptionsDialog,
+                                onToggle = {
+                                    vm.togglePatch(patch)
                                 },
-                                leadingContent = {
-                                    Checkbox(
-                                        checked = viewModel.selectedPatches.contains(patch),
-                                        onCheckedChange = {
-                                            if (viewModel.selectedPatches.contains(patch))
-                                                viewModel.selectedPatches.remove(patch)
-                                            else
-                                                viewModel.selectedPatches.add(patch)
-                                        }
-                                    )
-                                },
-                                headlineContent = {
-                                    Text(patch.name)
-                                },
-                                supportingContent = {
-                                    Text(patch.description)
-                                },
-                                trailingContent = {
-                                    if (patch.options.isNotEmpty()) {
-                                        IconButton(onClick = { showOptionsDialog = true }) {
-                                            Icon(Icons.Outlined.Settings, null)
-                                        }
-                                    }
-                                }
+                                selected = vm.isSelected(patch),
+                                supported = true
                             )
                         }
 
-                        if (patches["unsupported"]!!.isNotEmpty()) {
+                        if (bundle.unsupported.isNotEmpty()) {
                             item {
                                 Row(
-                                    modifier = Modifier
-                                        .fillMaxWidth()
-                                        .padding(horizontal = 14.dp)
-                                        .padding(end = 10.dp),
+                                    modifier = Modifier.fillMaxWidth().padding(horizontal = 14.dp).padding(end = 10.dp),
                                     horizontalArrangement = Arrangement.SpaceBetween
                                 ) {
-                                    GroupHeader("Unsupported patches", Modifier.padding(0.dp))
-                                    IconButton(onClick = { showUnsupportedDialog = true }) {
+                                    GroupHeader(stringResource(R.string.unsupported_patches), Modifier.padding(0.dp))
+                                    IconButton(onClick = vm::openUnsupportedDialog) {
                                         Icon(
-                                            Icons.Outlined.HelpOutline,
-                                            stringResource(R.string.help)
+                                            Icons.Outlined.HelpOutline, stringResource(R.string.help)
                                         )
                                     }
                                 }
@@ -180,53 +130,23 @@ fun PatchesSelectorScreen(
                         }
 
                         items(
-                            items = patches["unsupported"]!!,
+                            items = bundle.unsupported,
                             // key = { it.name }
                         ) { patch ->
-
-                            ListItem(
-                                modifier = Modifier
-                                    .alpha(0.5f)
-                                    .clickable(enabled = false) {
-                                        if (viewModel.selectedPatches.contains(patch))
-                                            viewModel.selectedPatches.remove(patch)
-                                        else
-                                            viewModel.selectedPatches.add(patch)
-                                    },
-                                leadingContent = {
-                                    Checkbox(
-                                        checked = viewModel.selectedPatches.contains(patch),
-                                        onCheckedChange = {
-                                            if (viewModel.selectedPatches.contains(patch))
-                                                viewModel.selectedPatches.remove(patch)
-                                            else
-                                                viewModel.selectedPatches.add(patch)
-                                        },
-                                        enabled = false
-                                    )
+                            PatchItem(
+                                patch = patch,
+                                onOptionsDialog = vm::openOptionsDialog,
+                                onToggle = {
+                                    vm.togglePatch(patch)
                                 },
-                                headlineContent = {
-                                    Text(patch.name)
-                                },
-                                supportingContent = {
-                                    Text(patch.description)
-                                },
-                                trailingContent = {
-                                    if (patch.options.isNotEmpty()) {
-                                        IconButton(onClick = { showOptionsDialog = true }, enabled = false) {
-                                            Icon(Icons.Outlined.Settings, null)
-                                        }
-                                    }
-                                }
+                                selected = vm.isSelected(patch),
+                                supported = allowUnsupported
                             )
                         }
                     }
 
 
-
-
-                }
-            )
+                })
         }
     }
 }
@@ -236,10 +156,10 @@ fun UnsupportedDialog(
     onDismissRequest: () -> Unit
 ) {
     val appVersion = "1.1.0"
-    val supportedVersions = listOf("1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0")
+    val supportedVersions =
+        listOf("1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0", "1.1.1", "1.2.0")
 
-    AlertDialog(
-        modifier = Modifier.padding(vertical = 45.dp),
+    AlertDialog(modifier = Modifier.padding(vertical = 45.dp),
         onDismissRequest = onDismissRequest,
         confirmButton = {
             TextButton(onClick = onDismissRequest) {
@@ -247,29 +167,21 @@ fun UnsupportedDialog(
             }
         },
         title = { Text(stringResource(R.string.unsupported_app)) },
-        text = { Text(stringResource(R.string.app_not_supported, appVersion, supportedVersions.joinToString(", "))) }
-    )
+        text = { Text(stringResource(R.string.app_not_supported, appVersion, supportedVersions.joinToString(", "))) })
 }
 
 @Composable
 fun OptionsDialog(
-    onDismissRequest: () -> Unit,
-    onConfirm: () -> Unit
+    onDismissRequest: () -> Unit, onConfirm: () -> Unit
 ) {
-    AlertDialog(
-        onDismissRequest = onDismissRequest,
-        confirmButton = {
-            Button(onClick = {
-                onConfirm()
-                onDismissRequest()
-            }
-            ) {
-                Text(stringResource(R.string.apply))
-            }
-        },
-        title = { Text(stringResource(R.string.options)) },
-        text = {
-            Text("You really thought these would exist?")
+    AlertDialog(onDismissRequest = onDismissRequest, confirmButton = {
+        Button(onClick = {
+            onConfirm()
+            onDismissRequest()
+        }) {
+            Text(stringResource(R.string.apply))
         }
-    )
+    }, title = { Text(stringResource(R.string.options)) }, text = {
+        Text("You really thought these would exist?")
+    })
 }

app/src/main/java/app/revanced/manager/compose/ui/viewmodel/AppSelectorViewModel.kt

@@ -0,0 +1,18 @@
+package app.revanced.manager.compose.ui.viewmodel
+
+import android.app.Application
+import android.net.Uri
+import androidx.lifecycle.ViewModel
+import app.revanced.manager.compose.util.PM
+import java.io.File
+import java.nio.file.Files
+
+class AppSelectorViewModel(private val app: Application) : ViewModel() {
+    fun loadSelectedFile(uri: Uri) =
+        app.contentResolver.openInputStream(uri)!!.use { stream ->
+            File(app.cacheDir, "input.apk").also {
+                if (it.exists()) it.delete()
+                Files.copy(stream, it.toPath())
+            }.let { PM.getApkInfo(it, app) }
+        }
+}

app/src/main/java/app/revanced/manager/compose/ui/viewmodel/InstallerScreenViewModel.kt

@@ -0,0 +1,109 @@
+package app.revanced.manager.compose.ui.viewmodel
+
+import android.app.Application
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.pm.PackageInstaller
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModel
+import androidx.work.*
+import app.revanced.manager.compose.patcher.worker.PatcherWorker
+import app.revanced.manager.compose.patcher.worker.PatcherProgressManager
+import app.revanced.manager.compose.patcher.worker.StepGroup
+import app.revanced.manager.compose.service.InstallService
+import app.revanced.manager.compose.service.UninstallService
+import app.revanced.manager.compose.util.PM
+import app.revanced.manager.compose.util.PackageInfo
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import java.io.File
+
+class InstallerScreenViewModel(
+    input: PackageInfo,
+    selectedPatches: List<String>,
+    private val app: Application
+) : ViewModel() {
+    var stepGroups by mutableStateOf<List<StepGroup>>(PatcherProgressManager.generateGroupsList(app, selectedPatches))
+        private set
+
+    private val workManager = WorkManager.getInstance(app)
+
+    // TODO: handle app installation as a step.
+    var installStatus by mutableStateOf<Boolean?>(null)
+    var pmStatus by mutableStateOf(-999)
+    var extra by mutableStateOf("")
+
+    private val outputFile = File(app.cacheDir, "output.apk")
+
+    private val patcherWorker =
+        OneTimeWorkRequest.Builder(PatcherWorker::class.java) // create Worker
+            .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST).setInputData(
+                workDataOf(
+                    PatcherWorker.ARGS_KEY to
+                            Json.Default.encodeToString(
+                                PatcherWorker.Args(
+                                    input.apk.path,
+                                    outputFile.path,
+                                    selectedPatches,
+                                    input.packageName,
+                                    input.packageName,
+                                )
+                            )
+                )
+            ).build()
+
+    private val liveData = workManager.getWorkInfoByIdLiveData(patcherWorker.id) // get LiveData
+
+    private val observer = Observer { workInfo: WorkInfo -> // observer for observing patch status
+        when (workInfo.state) {
+            WorkInfo.State.RUNNING -> workInfo.progress
+            WorkInfo.State.FAILED, WorkInfo.State.SUCCEEDED -> workInfo.outputData
+            else -> null
+        }?.let { PatcherProgressManager.groupsFromWorkData(it) }?.let { stepGroups = it }
+    }
+
+    private val installBroadcastReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context?, intent: Intent?) {
+            when (intent?.action) {
+                InstallService.APP_INSTALL_ACTION -> {
+                    pmStatus = intent.getIntExtra(InstallService.EXTRA_INSTALL_STATUS, -999)
+                    extra = intent.getStringExtra(InstallService.EXTRA_INSTALL_STATUS_MESSAGE)!!
+                    postInstallStatus()
+                }
+
+                UninstallService.APP_UNINSTALL_ACTION -> {
+                }
+            }
+        }
+    }
+
+    init {
+        workManager.enqueueUniqueWork("patching", ExistingWorkPolicy.KEEP, patcherWorker)
+        liveData.observeForever(observer)
+        app.registerReceiver(installBroadcastReceiver, IntentFilter().apply {
+            addAction(InstallService.APP_INSTALL_ACTION)
+            addAction(UninstallService.APP_UNINSTALL_ACTION)
+        })
+    }
+
+    fun installApk(apk: List<File>) {
+        PM.installApp(apk, app)
+    }
+
+    fun postInstallStatus() {
+        installStatus = pmStatus == PackageInstaller.STATUS_SUCCESS
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        liveData.removeObserver(observer)
+        app.unregisterReceiver(installBroadcastReceiver)
+        workManager.cancelWorkById(patcherWorker.id)
+        // logs.clear()
+    }
+}

app/src/main/java/app/revanced/manager/compose/ui/viewmodel/PatchesSelectorViewModel.kt

@@ -1,85 +1,61 @@
 package app.revanced.manager.compose.ui.viewmodel
 
-import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.*
 import androidx.lifecycle.ViewModel
+import app.revanced.manager.compose.patcher.data.repository.PatchesRepository
+import app.revanced.manager.compose.patcher.patch.PatchInfo
+import app.revanced.manager.compose.util.PackageInfo
+import kotlinx.coroutines.flow.map
 
-class PatchesSelectorViewModel: ViewModel() {
-    private val patchesList = listOf(
-        Patch("amogus-patch", "adds amogus to all apps, mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus mogus ",
-            options = listOf(
-                Option(
-                    "amogus"
-                )
-            ),
-            isSupported = true
-        ),
-        Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = true
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(
-                Option(
-                    "amogus"
-                )
-            ),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),Patch("microg-support", "makes microg work",
-            options = listOf(),
-            isSupported = false
-        ),
+class PatchesSelectorViewModel(packageInfo: PackageInfo, patchesRepository: PatchesRepository) :
+    ViewModel() {
+    val bundlesFlow = patchesRepository.getPatchInformation().map { patches ->
+        val supported = mutableListOf<PatchInfo>()
+        val unsupported = mutableListOf<PatchInfo>()
 
-    ).let { it + it + it + it + it }
+        patches.filter { it.compatibleWith(packageInfo.packageName) }.forEach {
+            val targetList = if (it.supportsVersion(packageInfo.packageName)) supported else unsupported
 
-    private val patchesLists = patchesList.groupBy { if (it.isSupported) "supported" else "unsupported" }
+            targetList.add(it)
+        }
 
-    val bundles = listOf(
-        Bundle(
-            name = "offical",
-            patches = patchesLists
-        ),
-        Bundle(
-            name = "extended",
-            patches = patchesLists
-        ),
-        Bundle(
-            name = "balls",
-            patches = patchesLists
-        ),
-    )
+        listOf(
+            Bundle(
+                name = "official",
+                supported, unsupported
+            )
+        )
+    }
 
-    var selectedPatches = mutableStateListOf<Patch>()
+    val selectedPatches = mutableStateListOf<String>()
+
+    fun isSelected(patch: PatchInfo) = selectedPatches.contains(patch.name)
+    fun togglePatch(patch: PatchInfo) {
+        val name = patch.name
+        if (isSelected(patch)) selectedPatches.remove(name) else selectedPatches.add(patch.name)
+    }
 
     data class Bundle(
         val name: String,
-        val patches: Map<String, List<Patch>>
+        val supported: List<PatchInfo>,
+        val unsupported: List<PatchInfo>
     )
 
-    data class Patch(
-        val name: String,
-        val description: String,
-        val options: List<Option>,
-        val isSupported: Boolean
-    )
+    var showOptionsDialog by mutableStateOf(false)
+        private set
+    var showUnsupportedDialog by mutableStateOf(false)
+        private set
 
-    data class Option(
-        val name: String
-    )
+    fun dismissDialogs() {
+        showOptionsDialog = false
+        showUnsupportedDialog = false
+    }
+
+    fun openOptionsDialog() {
+        showOptionsDialog = true
+    }
+
+    fun openUnsupportedDialog() {
+        showUnsupportedDialog = true
+    }
 }

app/src/main/java/app/revanced/manager/compose/util/PM.kt

@@ -6,120 +6,69 @@ import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageInstaller
 import android.content.pm.PackageManager
+import android.content.pm.PackageManager.PackageInfoFlags
 import android.graphics.drawable.Drawable
 import android.os.Build
 import android.os.Parcelable
 import androidx.compose.runtime.mutableStateListOf
 import app.revanced.manager.compose.service.InstallService
 import app.revanced.manager.compose.service.UninstallService
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 import kotlinx.parcelize.Parcelize
 import kotlinx.parcelize.RawValue
 import java.io.File
 
 private const val byteArraySize = 1024 * 1024 // Because 1,048,576 is not readable
 
+@Parcelize
+data class PackageInfo(val packageName: String, val version: String, val apk: File) : Parcelable {
+    constructor(appInfo: PM.AppInfo) : this(appInfo.packageName, appInfo.versionName, appInfo.apk)
+}
+
 @SuppressLint("QueryPermissionsNeeded")
 @Suppress("DEPRECATION")
 object PM {
-
-    val testList = mapOf(
-        "com.google.android.youtube" to 59,
-        "com.android.vending" to 34,
-        "com.backdrops.wallpapers" to 2,
-        "com.termux" to 2,
-        "com.notinstalled.app" to 1,
-        "com.2notinstalled.app" to 1,
-        "org.adaway" to 5,
-        "com.activitymanager" to 1,
-        "com.guoshi.httpcanary" to 1,
-        "org.lsposed.lspatch" to 1,
-        "app.revanced.manager.flutter" to 100,
-        "com.reddit.frontpage" to 20
-    )
-
     val appList = mutableStateListOf<AppInfo>()
     val supportedAppList = mutableStateListOf<AppInfo>()
 
     suspend fun loadApps(context: Context) {
         val packageManager = context.packageManager
 
-        testList.keys.map {
-            try {
-                val applicationInfo = packageManager.getApplicationInfo(it, 0)
-
-                AppInfo(
-                    it,
-                    applicationInfo.loadLabel(packageManager).toString(),
-                    applicationInfo.loadIcon(packageManager),
-                )
-            } catch (e: PackageManager.NameNotFoundException) {
-                AppInfo(
-                    it,
-                    "Not installed"
-                )
-            }
-        }.let { list ->
-            list.sortedWith(
-                compareByDescending<AppInfo> {
-                    testList[it.packageName]
-                }.thenBy { it.label }.thenBy { it.packageName }
-            )
-        }.also {
-            withContext(Dispatchers.Main) { supportedAppList.addAll(it) }
-        }
-
         val localAppList = mutableListOf<AppInfo>()
 
         packageManager.getInstalledApplications(PackageManager.GET_META_DATA).map {
             AppInfo(
                 it.packageName,
+                "0.69.420",
                 it.loadLabel(packageManager).toString(),
-                it.loadIcon(packageManager)
+                it.loadIcon(packageManager),
+                File("h")
             )
-        }.also { localAppList.addAll(it) }
-
-        testList.keys.mapNotNull { packageName ->
-            if (!localAppList.any { packageName == it.packageName }) {
-                AppInfo(
-                    packageName,
-                    "Not installed"
-                )
-            } else {
-                null
-            }
-        }.also { localAppList.addAll(it) }
-
-        localAppList.sortWith(
-            compareByDescending<AppInfo> {
-                testList[it.packageName]
-            }.thenBy { it.label }.thenBy { it.packageName }
-        ).also {
-            withContext(Dispatchers.Main) { appList.addAll(localAppList) }
-        }
+        }.also { localAppList.addAll(it) }.also { supportedAppList.addAll(it) }
     }
 
     @Parcelize
     data class AppInfo(
         val packageName: String,
+        val versionName: String,
         val label: String,
-        val icon: @RawValue Drawable? = null
+        val icon: @RawValue Drawable? = null,
+        val apk: File,
     ) : Parcelable
 
-    fun installApp(apk: File, context: Context) {
+    fun installApp(apks: List<File>, context: Context) {
         val packageInstaller = context.packageManager.packageInstaller
-        val session =
-            packageInstaller.openSession(packageInstaller.createSession(sessionParams))
-        session.writeApk(apk)
-        session.commit(context.installIntentSender)
-        session.close()
+        packageInstaller.openSession(packageInstaller.createSession(sessionParams)).use { session ->
+            apks.forEach { apk -> session.writeApk(apk) }
+            session.commit(context.installIntentSender)
+        }
     }
 
     fun uninstallPackage(pkg: String, context: Context) {
         val packageInstaller = context.packageManager.packageInstaller
         packageInstaller.uninstall(pkg, context.uninstallIntentSender)
     }
+
+    fun getApkInfo(apk: File, context: Context) = context.packageManager.getPackageArchiveInfo(apk.path, 0)!!.let { PackageInfo(it.packageName, it.versionName, apk) }
 }
 
 private fun PackageInstaller.Session.writeApk(apk: File) {

app/src/main/res/values/strings.xml

@@ -58,5 +58,15 @@
     <string name="no_sources_set">No sources set</string>
     <string name="no_patched_apps_found">No patched apps found</string>
     <string name="unsupported_app">Unsupported app</string>
+    <string name="unsupported_patches">Unsupported patches</string>
     <string name="app_not_supported">Some of the patches do not support this app version (%s). The patches only support the following versions: %s.</string>
+
+    <string name="installer">Installer</string>
+
+    <string name="patcher_step_group_prepare">Preparation</string>
+    <string name="patcher_step_unpack">Unpack Apk</string>
+    <string name="patcher_step_integrations">Merge Integrations</string>
+    <string name="patcher_step_group_patching">Patching</string>
+    <string name="patcher_step_group_saving">Saving</string>
+    <string name="patcher_step_write_patched">Write patched Apk</string>
 </resources>