Use coroutines for updater

app/build.gradle

@@ -110,16 +110,16 @@ dependencies {
     // Android support library
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.google.android.material:material:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.recyclerview:recyclerview:1.1.0'
     implementation 'androidx.preference:preference:1.1.0'
     implementation 'androidx.annotation:annotation:1.1.0'
     implementation 'androidx.browser:browser:1.2.0'
-
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-
     implementation 'androidx.multidex:multidex:2.0.1'
 
+    // UI library
+    implementation 'com.google.android.material:material:1.1.0'
+
     standardImplementation 'com.google.firebase:firebase-core:17.2.2'
 
     // ReactiveX
@@ -221,7 +221,7 @@ dependencies {
     implementation "com.jakewharton.rxbinding:rxbinding-recyclerview-v7-kotlin:$rxbindings_version"
 
     // Tests
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
     testImplementation 'org.assertj:assertj-core:1.7.1'
     testImplementation 'org.mockito:mockito-core:1.10.19'
 

app/src/main/java/eu/kanade/tachiyomi/data/track/model/TrackSearch.kt

@@ -53,12 +53,11 @@ class TrackSearch : Track {
         result = 31 * result + media_id
         return result
     }
-    companion object {
 
+    companion object {
         fun create(serviceId: Int): TrackSearch = TrackSearch().apply {
             sync_id = serviceId
         }
-
     }
 
-}
+}

app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdateChecker.kt

@@ -3,7 +3,6 @@ package eu.kanade.tachiyomi.data.updater
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.data.updater.devrepo.DevRepoUpdateChecker
 import eu.kanade.tachiyomi.data.updater.github.GithubUpdateChecker
-import rx.Observable
 
 abstract class UpdateChecker {
 
@@ -20,6 +19,6 @@ abstract class UpdateChecker {
     /**
      * Returns observable containing release information
      */
-    abstract fun checkForUpdate(): Observable<UpdateResult>
+    abstract suspend fun checkForUpdate(): UpdateResult
 
 }

app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterJob.kt

@@ -9,36 +9,37 @@ import com.evernote.android.job.JobRequest
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.notification.Notifications
 import eu.kanade.tachiyomi.util.system.notificationManager
+import kotlinx.coroutines.runBlocking
 
 class UpdaterJob : Job() {
 
     override fun onRunJob(params: Params): Result {
-        return UpdateChecker.getUpdateChecker()
-                .checkForUpdate()
-                .map { result ->
-                    if (result is UpdateResult.NewUpdate<*>) {
-                        val url = result.release.downloadLink
+        return runBlocking {
+            try {
+                val result = UpdateChecker.getUpdateChecker().checkForUpdate()
 
-                        val intent = Intent(context, UpdaterService::class.java).apply {
-                            putExtra(UpdaterService.EXTRA_DOWNLOAD_URL, url)
-                        }
+                if (result is UpdateResult.NewUpdate<*>) {
+                    val url = result.release.downloadLink
 
-                        NotificationCompat.Builder(context, Notifications.CHANNEL_COMMON).update {
-                            setContentTitle(context.getString(R.string.app_name))
-                            setContentText(context.getString(R.string.update_check_notification_update_available))
-                            setSmallIcon(android.R.drawable.stat_sys_download_done)
-                            // Download action
-                            addAction(android.R.drawable.stat_sys_download_done,
-                                    context.getString(R.string.action_download),
-                                    PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT))
-                        }
+                    val intent = Intent(context, UpdaterService::class.java).apply {
+                        putExtra(UpdaterService.EXTRA_DOWNLOAD_URL, url)
+                    }
+
+                    NotificationCompat.Builder(context, Notifications.CHANNEL_COMMON).update {
+                        setContentTitle(context.getString(R.string.app_name))
+                        setContentText(context.getString(R.string.update_check_notification_update_available))
+                        setSmallIcon(android.R.drawable.stat_sys_download_done)
+                        // Download action
+                        addAction(android.R.drawable.stat_sys_download_done,
+                                context.getString(R.string.action_download),
+                                PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT))
                     }
-                    Result.SUCCESS
                 }
-                .onErrorReturn { Result.FAILURE }
-                // Sadly, the task needs to be synchronous.
-                .toBlocking()
-                .single()
+                Result.SUCCESS
+            } catch (e: Exception) {
+                Result.FAILURE
+            }
+        }
     }
 
     fun NotificationCompat.Builder.update(block: NotificationCompat.Builder.() -> Unit) {

app/src/main/java/eu/kanade/tachiyomi/data/updater/devrepo/DevRepoUpdateChecker.kt

@@ -5,9 +5,8 @@ import eu.kanade.tachiyomi.data.updater.UpdateChecker
 import eu.kanade.tachiyomi.data.updater.UpdateResult
 import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.network.NetworkHelper
-import eu.kanade.tachiyomi.network.asObservable
+import eu.kanade.tachiyomi.network.await
 import okhttp3.OkHttpClient
-import rx.Observable
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
@@ -23,18 +22,17 @@ class DevRepoUpdateChecker : UpdateChecker() {
         Regex("tachiyomi-r(\\d+).apk")
     }
 
-    override fun checkForUpdate(): Observable<UpdateResult> {
-        return client.newCall(GET(DevRepoRelease.LATEST_URL)).asObservable()
-                .map { response ->
-                    // Get latest repo version number from header in format "Location: tachiyomi-r1512.apk"
-                    val latestVersionNumber: String = versionRegex.find(response.header("Location")!!)!!.groupValues[1]
-
-                    if (latestVersionNumber.toInt() > BuildConfig.COMMIT_COUNT.toInt()) {
-                        DevRepoUpdateResult.NewUpdate(DevRepoRelease("v$latestVersionNumber"))
-                    } else {
-                        DevRepoUpdateResult.NoNewUpdate()
-                    }
-                }
+    override suspend fun checkForUpdate(): UpdateResult {
+        val response = client.newCall(GET(DevRepoRelease.LATEST_URL)).await(assertSuccess = false)
+
+        // Get latest repo version number from header in format "Location: tachiyomi-r1512.apk"
+        val latestVersionNumber: String = versionRegex.find(response.header("Location")!!)!!.groupValues[1]
+
+        return if (latestVersionNumber.toInt() > BuildConfig.COMMIT_COUNT.toInt()) {
+            DevRepoUpdateResult.NewUpdate(DevRepoRelease("v$latestVersionNumber"))
+        } else {
+            DevRepoUpdateResult.NoNewUpdate()
+        }
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/data/updater/github/GithubService.kt

@@ -5,7 +5,6 @@ import retrofit2.Retrofit
 import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory
 import retrofit2.converter.gson.GsonConverterFactory
 import retrofit2.http.GET
-import rx.Observable
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
@@ -28,6 +27,6 @@ interface GithubService {
     }
 
     @GET("/repos/inorichi/tachiyomi/releases/latest")
-    fun getLatestVersion(): Observable<GithubRelease>
+    suspend fun getLatestVersion(): GithubRelease
 
 }

app/src/main/java/eu/kanade/tachiyomi/data/updater/github/GithubUpdateChecker.kt

@@ -3,22 +3,21 @@ package eu.kanade.tachiyomi.data.updater.github
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.data.updater.UpdateChecker
 import eu.kanade.tachiyomi.data.updater.UpdateResult
-import rx.Observable
 
 class GithubUpdateChecker : UpdateChecker() {
 
     private val service: GithubService = GithubService.create()
 
-    override fun checkForUpdate(): Observable<UpdateResult> {
-        return service.getLatestVersion().map { release ->
-            val newVersion = release.version.replace("[^\\d.]".toRegex(), "")
+    override suspend fun checkForUpdate(): UpdateResult {
+        val release = service.getLatestVersion()
 
-            // Check if latest version is different from current version
-            if (newVersion != BuildConfig.VERSION_NAME) {
-                GithubUpdateResult.NewUpdate(release)
-            } else {
-                GithubUpdateResult.NoNewUpdate()
-            }
+        val newVersion = release.version.replace("[^\\d.]".toRegex(), "")
+
+        // Check if latest version is different from current version
+        return if (newVersion != BuildConfig.VERSION_NAME) {
+            GithubUpdateResult.NewUpdate(release)
+        } else {
+            GithubUpdateResult.NoNewUpdate()
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt

@@ -48,11 +48,11 @@ fun Call.asObservable(): Observable<Response> {
 }
 
 // Based on https://github.com/gildor/kotlin-coroutines-okhttp
-suspend fun Call.await(): Response {
+suspend fun Call.await(assertSuccess: Boolean = false): Response {
     return suspendCancellableCoroutine { continuation ->
         enqueue(object : Callback {
             override fun onResponse(call: Call, response: Response) {
-                if (!response.isSuccessful) {
+                if (assertSuccess && !response.isSuccessful) {
                     continuation.resumeWithException(Exception("HTTP error ${response.code}"))
                     return
                 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutController.kt

@@ -4,7 +4,6 @@ import android.app.Dialog
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
-import android.view.View
 import androidx.preference.PreferenceScreen
 import com.afollestad.materialdialogs.MaterialDialog
 import eu.kanade.tachiyomi.BuildConfig
@@ -17,12 +16,11 @@ import eu.kanade.tachiyomi.data.updater.UpdaterJob
 import eu.kanade.tachiyomi.data.updater.UpdaterService
 import eu.kanade.tachiyomi.ui.base.controller.DialogController
 import eu.kanade.tachiyomi.ui.main.ChangelogDialogController
+import eu.kanade.tachiyomi.util.lang.launchIO
+import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.lang.toTimestampString
 import eu.kanade.tachiyomi.util.preference.*
 import eu.kanade.tachiyomi.util.system.toast
-import rx.Subscription
-import rx.android.schedulers.AndroidSchedulers
-import rx.schedulers.Schedulers
 import timber.log.Timber
 import uy.kohesive.injekt.injectLazy
 import java.text.DateFormat
@@ -43,11 +41,6 @@ class SettingsAboutController : SettingsController() {
 
     private val dateFormat: DateFormat = userPreferences.dateFormat().getOrDefault()
 
-    /**
-     * The subscribtion service of the obtained release object
-     */
-    private var releaseSubscription: Subscription? = null
-
     private val isUpdaterEnabled = BuildConfig.INCLUDE_UPDATER
 
     override fun setupPreferenceScreen(screen: PreferenceScreen) = with(screen) {
@@ -118,12 +111,6 @@ class SettingsAboutController : SettingsController() {
         }
     }
 
-    override fun onDestroyView(view: View) {
-        super.onDestroyView(view)
-        releaseSubscription?.unsubscribe()
-        releaseSubscription = null
-    }
-
     /**
      * Checks version and shows a user prompt if an update is available.
      */
@@ -131,11 +118,11 @@ class SettingsAboutController : SettingsController() {
         if (activity == null) return
 
         activity?.toast(R.string.update_check_look_for_updates)
-        releaseSubscription?.unsubscribe()
-        releaseSubscription = updateChecker.checkForUpdate()
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe({ result ->
+
+        launchIO {
+            try {
+                val result = updateChecker.checkForUpdate()
+                launchUI {
                     when (result) {
                         is UpdateResult.NewUpdate<*> -> {
                             val body = result.release.info
@@ -148,10 +135,14 @@ class SettingsAboutController : SettingsController() {
                             activity?.toast(R.string.update_check_no_new_updates)
                         }
                     }
-                }, { error ->
+                }
+            } catch (error: Exception) {
+                launchUI {
                     activity?.toast(error.message)
                     Timber.e(error)
-                })
+                }
+            }
+        }
     }
 
     class NewUpdateDialogController(bundle: Bundle? = null) : DialogController(bundle) {