Use lifecycleScope rather than an Empty ViewModel

vector/src/main/java/im/vector/app/core/platform/EmptyState.kt

@@ -1,23 +0,0 @@
-/*
- * Copyright (c) 2021 New Vector Ltd
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package im.vector.app.core.platform
-
-import com.airbnb.mvrx.MvRxState
-
-data class EmptyState(
-        val dummy: Int = 0
-) : MvRxState

vector/src/main/java/im/vector/app/core/platform/EmptyViewModel.kt

@@ -1,26 +0,0 @@
-/*
- * Copyright (c) 2021 New Vector Ltd
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package im.vector.app.core.platform
-
-/**
- * Mainly used to get a viewModelScope
- */
-class EmptyViewModel(initialState: EmptyState) : VectorViewModel<EmptyState, EmptyAction, EmptyViewEvents>(initialState) {
-    override fun handle(action: EmptyAction) {
-        // N/A
-    }
-}

vector/src/main/java/im/vector/app/features/MainActivity.kt

@@ -22,15 +22,13 @@ import android.os.Bundle
 import android.os.Parcelable
 import androidx.appcompat.app.AlertDialog
 import androidx.lifecycle.Lifecycle
-import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.lifecycleScope
-import com.airbnb.mvrx.viewModel
 import com.bumptech.glide.Glide
 import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.di.ScreenComponent
 import im.vector.app.core.error.ErrorFormatter
 import im.vector.app.core.extensions.startSyncing
-import im.vector.app.core.platform.EmptyViewModel
 import im.vector.app.core.platform.VectorBaseActivity
 import im.vector.app.core.utils.deleteAllFiles
 import im.vector.app.databinding.FragmentLoadingBinding
@@ -83,8 +81,6 @@ class MainActivity : VectorBaseActivity<FragmentLoadingBinding>(), UnlockedActiv
         }
     }
 
-    private val emptyViewModel: EmptyViewModel by viewModel()
-
     override fun getBinding() = FragmentLoadingBinding.inflate(layoutInflater)
 
     private lateinit var args: MainActivityArgs
@@ -150,7 +146,7 @@ class MainActivity : VectorBaseActivity<FragmentLoadingBinding>(), UnlockedActiv
         }
         when {
             args.isAccountDeactivated -> {
-                emptyViewModel.viewModelScope.launch {
+                lifecycleScope.launch {
                     // Just do the local cleanup
                     Timber.w("Account deactivated, start app")
                     sessionHolder.clearActiveSession()
@@ -159,7 +155,7 @@ class MainActivity : VectorBaseActivity<FragmentLoadingBinding>(), UnlockedActiv
                 }
             }
             args.clearCredentials     -> {
-                emptyViewModel.viewModelScope.launch {
+                lifecycleScope.launch {
                     try {
                         session.signOut(!args.isUserLoggedOut)
                         Timber.w("SIGN_OUT: success, start app")
@@ -172,7 +168,7 @@ class MainActivity : VectorBaseActivity<FragmentLoadingBinding>(), UnlockedActiv
                 }
             }
             args.clearCache           -> {
-                emptyViewModel.viewModelScope.launch {
+                lifecycleScope.launch {
                     try {
                         session.clearCache()
                         doLocalCleanup(clearPreferences = false)

vector/src/main/java/im/vector/app/features/link/LinkHandlerActivity.kt

@@ -19,13 +19,11 @@ package im.vector.app.features.link
 import android.content.Intent
 import android.net.Uri
 import androidx.appcompat.app.AlertDialog
-import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.lifecycleScope
-import com.airbnb.mvrx.viewModel
 import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.di.ScreenComponent
 import im.vector.app.core.error.ErrorFormatter
-import im.vector.app.core.platform.EmptyViewModel
 import im.vector.app.core.platform.VectorBaseActivity
 import im.vector.app.core.utils.toast
 import im.vector.app.databinding.ActivityProgressBinding
@@ -48,8 +46,6 @@ class LinkHandlerActivity : VectorBaseActivity<ActivityProgressBinding>() {
     @Inject lateinit var errorFormatter: ErrorFormatter
     @Inject lateinit var permalinkHandler: PermalinkHandler
 
-    private val emptyViewModel: EmptyViewModel by viewModel()
-
     override fun injectWith(injector: ScreenComponent) {
         injector.inject(this)
     }
@@ -155,7 +151,7 @@ class LinkHandlerActivity : VectorBaseActivity<ActivityProgressBinding>() {
             // Should not happen
             startLoginActivity(uri)
         } else {
-            emptyViewModel.viewModelScope.launch {
+            lifecycleScope.launch {
                 try {
                     session.signOut(true)
                     Timber.d("## displayAlreadyLoginPopup(): logout succeeded")