Convert SyncAdapters to Kotlin

app/src/main/java/com/todoroo/astrid/activity/TaskListFragment.kt

@@ -50,6 +50,7 @@ import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.disposables.Disposable
 import io.reactivex.subjects.PublishSubject
 import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.tasks.LocalBroadcastManager
@@ -92,7 +93,6 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
         TaskViewHolder.ViewHolderCallbacks {
     private val refreshReceiver = RefreshReceiver()
     private val repeatConfirmationReceiver = RepeatConfirmationReceiver()
-    private var disposables: CompositeDisposable? = null
 
     @Inject lateinit var syncAdapters: SyncAdapters
     @Inject lateinit var taskDeleter: TaskDeleter
@@ -146,20 +146,14 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
     private lateinit var callbacks: TaskListFragmentCallbackHandler
 
     override fun onRefresh() {
-        disposables!!.add(
-                syncAdapters
-                        .sync(true)
-                        .doOnSuccess { initiated: Boolean ->
-                            if (!initiated) {
-                                refresh()
-                            }
-                        }
-                        .delay(1, TimeUnit.SECONDS, AndroidSchedulers.mainThread())
-                        .subscribe { initiated: Boolean ->
-                            if (initiated) {
-                                setSyncOngoing()
-                            }
-                        })
+        lifecycleScope.launch {
+            if (syncAdapters.sync(true)) {
+                delay(1000)
+                setSyncOngoing()
+            } else {
+                refresh()
+            }
+        }
     }
 
     private fun setSyncOngoing() {
@@ -445,7 +439,6 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
 
     override fun onResume() {
         super.onResume()
-        disposables = CompositeDisposable()
         localBroadcastManager.registerRefreshReceiver(refreshReceiver)
         localBroadcastManager.registerRepeatReceiver(repeatConfirmationReceiver)
         refresh()
@@ -465,7 +458,6 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
 
     override fun onPause() {
         super.onPause()
-        disposables?.dispose()
         localBroadcastManager.unregisterReceiver(repeatConfirmationReceiver)
         localBroadcastManager.unregisterReceiver(refreshReceiver)
     }
@@ -499,7 +491,9 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
         for (task in tasks) {
             onTaskCreated(task.uuid)
         }
-        syncAdapters.sync()
+        lifecycleScope.launch {
+            syncAdapters.sync()
+        }
         loadTaskListContent()
     }
 

app/src/main/java/org/tasks/jobs/AfterSaveWork.kt

@@ -71,8 +71,8 @@ class AfterSaveWork @WorkerInject constructor(
                 timerPlugin.stopTimer(task)
             }
         }
-        if (data.getBoolean(EXTRA_PUSH_GTASKS, false) && syncAdapters.isGoogleTaskSyncEnabled
-                || data.getBoolean(EXTRA_PUSH_CALDAV, false) && syncAdapters.isCaldavSyncEnabled) {
+        if (data.getBoolean(EXTRA_PUSH_GTASKS, false) && syncAdapters.isGoogleTaskSyncEnabled()
+                || data.getBoolean(EXTRA_PUSH_CALDAV, false) && syncAdapters.isCaldavSyncEnabled()) {
             workManager.sync(false)
         }
         refreshScheduler.scheduleRefresh(task)

app/src/main/java/org/tasks/jobs/SyncWork.kt

@@ -31,7 +31,7 @@ class SyncWork @WorkerInject constructor(
         private val syncAdapters: SyncAdapters) : BaseWorker(context, workerParams, firebase) {
     
     override suspend fun run(): Result {
-        if (!syncAdapters.isSyncEnabled) {
+        if (!syncAdapters.isSyncEnabled()) {
             return Result.success()
         }
         synchronized(LOCK) {

app/src/main/java/org/tasks/sync/SyncAdapters.java

@@ -1,51 +0,0 @@
-package org.tasks.sync;
-
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
-import javax.inject.Inject;
-import org.tasks.data.CaldavDaoBlocking;
-import org.tasks.data.GoogleTaskListDaoBlocking;
-import org.tasks.jobs.WorkManager;
-
-public class SyncAdapters {
-
-  private final WorkManager workManager;
-  private final CaldavDaoBlocking caldavDao;
-  private final GoogleTaskListDaoBlocking googleTaskListDao;
-
-  @Inject
-  public SyncAdapters(
-      WorkManager workManager, CaldavDaoBlocking caldavDao, GoogleTaskListDaoBlocking googleTaskListDao) {
-    this.workManager = workManager;
-    this.caldavDao = caldavDao;
-    this.googleTaskListDao = googleTaskListDao;
-  }
-
-  public void sync() {
-    sync(false).subscribe();
-  }
-
-  public Single<Boolean> sync(boolean immediate) {
-    return Single.fromCallable(this::isSyncEnabled)
-        .subscribeOn(Schedulers.io())
-        .observeOn(AndroidSchedulers.mainThread())
-        .doOnSuccess(enabled -> {
-          if (enabled) {
-            workManager.sync(immediate);
-          }
-        });
-  }
-
-  public boolean isSyncEnabled() {
-    return isGoogleTaskSyncEnabled() || isCaldavSyncEnabled();
-  }
-
-  public boolean isGoogleTaskSyncEnabled() {
-    return googleTaskListDao.getAccounts().size() > 0;
-  }
-
-  public boolean isCaldavSyncEnabled() {
-    return caldavDao.accountCount() > 0;
-  }
-}

app/src/main/java/org/tasks/sync/SyncAdapters.kt

@@ -0,0 +1,33 @@
+package org.tasks.sync
+
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.withContext
+import org.tasks.data.CaldavDao
+import org.tasks.data.GoogleTaskListDao
+import org.tasks.jobs.WorkManager
+import javax.inject.Inject
+
+class SyncAdapters @Inject constructor(
+        private val workManager: WorkManager,
+        private val caldavDao: CaldavDao,
+        private val googleTaskListDao: GoogleTaskListDao) {
+
+    suspend fun sync() {
+        sync(false)
+    }
+
+    suspend fun sync(immediate: Boolean): Boolean = withContext(NonCancellable) {
+        if (isSyncEnabled()) {
+            workManager.sync(immediate)
+            true
+        } else {
+            false
+        }
+    }
+
+    suspend fun isSyncEnabled(): Boolean = isGoogleTaskSyncEnabled() || isCaldavSyncEnabled()
+
+    suspend fun isGoogleTaskSyncEnabled(): Boolean = googleTaskListDao.getAccounts().isNotEmpty()
+
+    suspend fun isCaldavSyncEnabled(): Boolean = caldavDao.accountCount() > 0
+}