De-Rx ModuleViewModel

app/src/main/java/com/topjohnwu/magisk/model/events/ViewEvents.kt

@@ -131,7 +131,7 @@ class OpenChangelogEvent(val item: Repo) : ViewEvent(), ContextExecutor {
     }
 }
 
-class PermissionEvent(
+class RxPermissionEvent(
     val permissions: List<String>,
     val callback: PublishSubject<Boolean>
 ) : ViewEvent(), ActivityExecutor {
@@ -148,6 +148,22 @@ class PermissionEvent(
         }
 }
 
+class PermissionEvent(
+    private val permissions: List<String>,
+    private val callback: (Boolean) -> Unit
+) : ViewEvent(), ActivityExecutor {
+
+    override fun invoke(activity: BaseActivity) =
+        activity.withPermissions(*permissions.toTypedArray()) {
+            onSuccess {
+                callback(true)
+            }
+            onFailure {
+                callback(false)
+            }
+        }
+}
+
 class BackPressEvent : ViewEvent(), ActivityExecutor {
     override fun invoke(activity: BaseActivity) {
         activity.onBackPressed()

app/src/main/java/com/topjohnwu/magisk/ui/base/BaseViewModel.kt

@@ -1,5 +1,6 @@
 package com.topjohnwu.magisk.ui.base
 
+import android.Manifest
 import androidx.annotation.CallSuper
 import androidx.core.graphics.Insets
 import androidx.databinding.Bindable
@@ -88,7 +89,15 @@ abstract class BaseViewModel(
 
     fun withPermissions(vararg permissions: String): Observable<Boolean> {
         val subject = PublishSubject.create<Boolean>()
-        return subject.doOnSubscribeUi { PermissionEvent(permissions.toList(), subject).publish() }
+        return subject.doOnSubscribeUi { RxPermissionEvent(permissions.toList(), subject).publish() }
+    }
+
+    fun withPermissions(vararg permissions: String, callback: (Boolean) -> Unit) {
+        PermissionEvent(permissions.toList(), callback).publish()
+    }
+
+    fun withExternalRW(callback: (Boolean) -> Unit) {
+        withPermissions(Manifest.permission.WRITE_EXTERNAL_STORAGE, callback = callback)
     }
 
     fun back() = BackPressEvent().publish()

app/src/main/java/com/topjohnwu/magisk/ui/base/Queryable.kt

@@ -1,23 +1,17 @@
 package com.topjohnwu.magisk.ui.base
 
 import android.os.Handler
-import android.os.Looper
+import androidx.core.os.postDelayed
+import com.topjohnwu.superuser.internal.UiThreadHandler
 
 interface Queryable {
 
     val queryDelay: Long
-    val queryHandler: Handler
+    val queryHandler: Handler get() = UiThreadHandler.handler
-    val queryRunnable: Runnable
 
-    fun submitQuery()
+    fun submitQuery() {
-
+        queryHandler.postDelayed(queryDelay) { query() }
-    companion object {
-        fun impl(delay: Long = 1000L) = object : Queryable {
-            override val queryDelay = delay
-            override val queryHandler = Handler(Looper.getMainLooper())
-            override val queryRunnable = Runnable { TODO() }
-
-            override fun submitQuery() {}
-        }
     }
+
+    fun query()
 }

app/src/main/java/com/topjohnwu/magisk/ui/hide/HideViewModel.kt

@@ -21,16 +21,16 @@ import com.topjohnwu.magisk.utils.KObservableField
 
 class HideViewModel(
     private val magiskRepo: MagiskRepository
-) : BaseViewModel(), Queryable by Queryable.impl(1000) {
+) : BaseViewModel(), Queryable {
 
-    override val queryRunnable = Runnable { query() }
+    override val queryDelay = 1000L
 
     var isShowSystem = false
         @Bindable get
         set(value) {
             field = value
             notifyPropertyChanged(BR.showSystem)
-            query()
+            submitQuery()
         }
 
     var query = ""
@@ -81,17 +81,9 @@ class HideViewModel(
 
     // ---
 
-    override fun submitQuery() {
+    override fun query() = items.filter {
-        queryHandler.removeCallbacks(queryRunnable)
-        queryHandler.postDelayed(queryRunnable, queryDelay)
-    }
-
-    private fun query(
-        query: String = this.query,
-        showSystem: Boolean = isShowSystem
-    ) = items.filter {
         fun filterSystem(): Boolean {
-            return showSystem || it.item.info.info.flags and ApplicationInfo.FLAG_SYSTEM == 0
+            return isShowSystem || it.item.info.info.flags and ApplicationInfo.FLAG_SYSTEM == 0
         }
 
         fun filterQuery(): Boolean {

app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt

@@ -1,6 +1,5 @@
 package com.topjohnwu.magisk.ui.module
 
-import android.Manifest
 import androidx.databinding.Bindable
 import androidx.databinding.ObservableArrayList
 import androidx.lifecycle.viewModelScope
@@ -16,7 +15,6 @@ import com.topjohnwu.magisk.data.database.RepoByUpdatedDao
 import com.topjohnwu.magisk.databinding.ComparableRvItem
 import com.topjohnwu.magisk.extensions.addOnListChangedCallback
 import com.topjohnwu.magisk.extensions.reboot
-import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.entity.recycler.*
 import com.topjohnwu.magisk.model.events.InstallExternalModuleEvent
@@ -26,13 +24,9 @@ import com.topjohnwu.magisk.model.events.dialog.ModuleInstallDialog
 import com.topjohnwu.magisk.ui.base.*
 import com.topjohnwu.magisk.utils.EndlessRecyclerScrollListener
 import com.topjohnwu.magisk.utils.KObservableField
-import com.topjohnwu.superuser.internal.UiThreadHandler
-import io.reactivex.Single
-import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.Disposable
 import kotlinx.coroutines.*
 import me.tatarka.bindingcollectionadapter2.collections.MergeObservableList
-import java.lang.Runnable
 import kotlin.math.roundToInt
 
 /*
@@ -53,9 +47,11 @@ class ModuleViewModel(
     private val repoName: RepoByNameDao,
     private val repoUpdated: RepoByUpdatedDao,
     private val repoUpdater: RepoUpdater
-) : BaseViewModel(), Queryable by Queryable.impl(1000) {
+) : BaseViewModel(), Queryable {
 
-    override val queryRunnable = Runnable { query() }
+    override val queryDelay = 1000L
+    private var queryJob: Job? = null
+    private var remoteJob: Job? = null
 
     var query = ""
         @Bindable get
@@ -68,7 +64,6 @@ class ModuleViewModel(
             searchLoading.value = true
         }
 
-    private var queryJob: Disposable? = null
     val searchLoading = KObservableField(false)
     val itemsSearch = diffListOf<RepoItem>()
     val itemSearchBinding = itemBindingOf<RepoItem> {
@@ -213,16 +208,15 @@ class ModuleViewModel(
         state = State.LOADED
     }
 
-    @Synchronized
     fun loadRemote() {
         // check for existing jobs
-        if (isRemoteLoading)
+        if (remoteJob?.isActive == true)
             return
-        if (itemsRemote.isEmpty()) {
-            EndlessRecyclerScrollListener.ResetState().publish()
-        }
 
-        viewModelScope.launch {
+        if (itemsRemote.isEmpty())
+            EndlessRecyclerScrollListener.ResetState().publish()
+
+        remoteJob = viewModelScope.launch {
             suspend fun loadRemoteDB(offset: Int) = withContext(Dispatchers.IO) {
                 dao.getRepos(offset).map { RepoItem.Remote(it) }
             }
@@ -236,7 +230,7 @@ class ModuleViewModel(
             }
             isRemoteLoading = false
             refetch = false
-            UiThreadHandler.handler.post { itemsRemote.addAll(repos) }
+            queryHandler.post { itemsRemote.addAll(repos) }
         }
     }
 
@@ -250,44 +244,44 @@ class ModuleViewModel(
 
     // ---
 
-    override fun submitQuery() {
+    private suspend fun queryInternal(query: String, offset: Int): List<RepoItem> {
-        queryHandler.removeCallbacks(queryRunnable)
+        return if (query.isBlank()) {
-        queryHandler.postDelayed(queryRunnable, queryDelay)
+            itemsSearch.clear()
-    }
+            listOf()
-
+        } else {
-    private fun queryInternal(query: String, offset: Int): Single<List<RepoItem>> {
+            withContext(Dispatchers.IO) {
-        if (query.isBlank()) {
+                dao.searchRepos(query, offset).map { RepoItem.Remote(it) }
-            return Single.just(listOf<RepoItem>())
+            }
-                .doOnSubscribe { itemsSearch.clear() }
-                .subscribeOn(AndroidSchedulers.mainThread())
         }
-        return Single.fromCallable { dao.searchRepos(query, offset) }
-            .map { it.map { RepoItem.Remote(it) } }
     }
 
-    private fun query(query: String = this.query, offset: Int = 0) {
+    override fun query() {
-        queryJob?.dispose()
+        queryJob = viewModelScope.launch {
-        queryJob = queryInternal(query, offset)
+            val searched = queryInternal(query, 0)
-            .map { it to itemsSearch.calculateDiff(it) }
+            val diff = withContext(Dispatchers.Default) {
-            .observeOn(AndroidSchedulers.mainThread())
+                itemsSearch.calculateDiff(searched)
-            .doOnSuccess { searchLoading.value = false }
+            }
-            .subscribeK { itemsSearch.update(it.first, it.second) }
+            searchLoading.value = false
+            itemsSearch.update(searched, diff)
+        }
     }
 
-    @Synchronized
     fun loadMoreQuery() {
-        if (queryJob?.isDisposed == false) return
+        if (queryJob?.isActive == true) return
-        queryJob = queryInternal(query, itemsSearch.size)
+        queryJob = viewModelScope.launch {
-            .subscribeK { itemsSearch.addAll(it) }
+            val searched = queryInternal(query, itemsSearch.size)
+            queryHandler.post { itemsSearch.addAll(searched) }
+        }
     }
 
     // ---
 
-    private fun update(repo: Repo, progress: Int) =
+    private fun update(repo: Repo, progress: Int) = viewModelScope.launch {
-        Single.fromCallable { itemsRemote + itemsSearch }
+        val item = withContext(Dispatchers.Default) {
-            .map { it.first { it.item.id == repo.id } }
+            (itemsRemote + itemsSearch).first { it.item.id == repo.id }
-            .subscribeK { it.progress.value = progress }
+        }
-            .add()
+        item.progress.value = progress
+    }
 
     // ---
 
@@ -305,12 +299,14 @@ class ModuleViewModel(
 
     // ---
 
-    fun updateActiveState() = Single.fromCallable { itemsInstalled.any { it.isModified } }
+    fun updateActiveState() = viewModelScope.launch {
-        .subscribeK { sectionActive.hasButton = it }
+        sectionActive.hasButton = withContext(Dispatchers.Default) {
-        .add()
+            itemsInstalled.any { it.isModified }
+        }
+    }
 
     fun sectionPressed(item: SectionTitle) = when (item) {
-        sectionActive -> reboot() //TODO add reboot picker, regular reboot is not always preferred
+        sectionActive -> reboot() // TODO add reboot picker, regular reboot is not always preferred
         sectionRemote -> {
             Config.repoOrder = when (Config.repoOrder) {
                 Config.Value.ORDER_NAME -> Config.Value.ORDER_DATE
@@ -318,28 +314,28 @@ class ModuleViewModel(
                 else -> Config.Value.ORDER_NAME
             }
             updateOrderIcon()
-            Single.fromCallable { itemsRemote }
+            queryHandler.post {
-                .subscribeK {
+                itemsRemote.clear()
-                    itemsRemote.removeAll(it)
+                loadRemote()
-                    loadRemote()
+            }
-                }.add()
+            Unit
         }
         else -> Unit
     }
 
-    fun downloadPressed(item: RepoItem) = withPermissions(
+    fun downloadPressed(item: RepoItem) = withExternalRW {
-        Manifest.permission.READ_EXTERNAL_STORAGE,
+        if (it)
-        Manifest.permission.WRITE_EXTERNAL_STORAGE
+            ModuleInstallDialog(item.item).publish()
-    ).any { it }.subscribeK(onError = { permissionDenied() }) {
+        else
-        ModuleInstallDialog(item.item).publish()
+            permissionDenied()
-    }.add()
+    }
 
-    fun installPressed() = withPermissions(
+    fun installPressed() = withExternalRW {
-        Manifest.permission.READ_EXTERNAL_STORAGE,
+        if (it)
-        Manifest.permission.WRITE_EXTERNAL_STORAGE
+            InstallExternalModuleEvent().publish()
-    ).any { it }.subscribeK(onError = { permissionDenied() }) {
+        else
-        InstallExternalModuleEvent().publish()
+            permissionDenied()
-    }.add()
+    }
 
     fun infoPressed(item: RepoItem) = OpenChangelogEvent(item.item).publish()
     fun infoPressed(item: ModuleItem) {

app/src/main/java/com/topjohnwu/magisk/ui/settings/SettingsViewModel.kt

@@ -16,7 +16,7 @@ import com.topjohnwu.magisk.extensions.subscribeK
 import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.entity.recycler.SettingsItem
-import com.topjohnwu.magisk.model.events.PermissionEvent
+import com.topjohnwu.magisk.model.events.RxPermissionEvent
 import com.topjohnwu.magisk.model.events.RecreateEvent
 import com.topjohnwu.magisk.model.events.dialog.BiometricDialog
 import com.topjohnwu.magisk.ui.base.BaseViewModel
@@ -137,7 +137,7 @@ class SettingsViewModel(
     private fun requireRWPermission() {
         val callback = PublishSubject.create<Boolean>()
         callback.subscribeK { if (!it) requireRWPermission() }
-        PermissionEvent(
+        RxPermissionEvent(
             listOf(
                 Manifest.permission.READ_EXTERNAL_STORAGE,
                 Manifest.permission.WRITE_EXTERNAL_STORAGE