Better organize authentication classes, use LifecycleObserver to cancel Jobs on onDestroy

app/build.gradle

@@ -80,3 +80,9 @@ dependencies {
 repositories {
     mavenCentral()
 }
+
+kotlin {
+    experimental {
+        coroutines "enable"
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/BaseActivity.kt

-package chat.rocket.android
-
-
-import android.support.v4.app.Fragment
-import android.support.v7.app.AppCompatActivity
-
-abstract class BaseActivity : AppCompatActivity() {
-
-    protected fun addFragment(tag: String, layoutId: Int, block: (Unit) -> Fragment) {
-        val fragment = supportFragmentManager.findFragmentByTag(tag) ?: block(Unit)
-        supportFragmentManager.beginTransaction().replace(layoutId, fragment, tag).commit()
-    }
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/di/AuthenticationModule.kt

@@ -6,6 +6,7 @@ import chat.rocket.android.authentication.ui.AuthenticationActivity
 import chat.rocket.android.dagger.scope.PerActivity
 import dagger.Module
 import dagger.Provides
+import kotlinx.coroutines.experimental.Job
 
 @Module
 class AuthenticationModule {
@@ -19,4 +20,9 @@ class AuthenticationModule {
     fun provideAuthTokenRepository(): AuthTokenRepository {
         return AuthTokenRepository()
     }
+
+    @Provides
+    fun provideJob(): Job {
+        return Job()
+    }
 }

app/src/main/java/chat/rocket/android/authentication/di/LoginFragmentModule.kt

-package chat.rocket.android.authentication.di
-
-import chat.rocket.android.authentication.presentation.LoginView
-import chat.rocket.android.authentication.ui.LoginFragment
-import dagger.Module
-import dagger.Provides
-
-@Module
-class LoginFragmentModule {
-    @Provides
-    fun loginView(frag: LoginFragment): LoginView {
-        return frag
-    }
-}

app/src/main/java/chat/rocket/android/authentication/di/SignupFragmentModule.kt

-package chat.rocket.android.authentication.di
-
-import chat.rocket.android.authentication.presentation.SignupView
-import chat.rocket.android.authentication.ui.SignupFragment
-import dagger.Module
-import dagger.Provides
-
-@Module
-class SignupFragmentModule {
-    @Provides
-    fun signupView(frag: SignupFragment): SignupView {
-        return frag
-    }
-}

app/src/main/java/chat/rocket/android/authentication/di/TwoFAFragmentModule.kt

-package chat.rocket.android.authentication.di
-
-import chat.rocket.android.authentication.presentation.LoginView
-import chat.rocket.android.authentication.presentation.TwoFAView
-import chat.rocket.android.authentication.ui.LoginFragment
-import chat.rocket.android.authentication.ui.TwoFAFragment
-import dagger.Module
-import dagger.Provides
-
-@Module
-class TwoFAFragmentModule {
-    @Provides
-    fun loginView(frag: TwoFAFragment): TwoFAView {
-        return frag
-    }
-}

app/src/main/java/chat/rocket/android/authentication/login/di/LoginFragmentModule.kt

+package chat.rocket.android.authentication.login.di
+
+import android.arch.lifecycle.LifecycleOwner
+import chat.rocket.android.authentication.login.presentation.LoginView
+import chat.rocket.android.authentication.login.ui.LoginFragment
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.dagger.scope.PerFragment
+import dagger.Module
+import dagger.Provides
+import kotlinx.coroutines.experimental.Job
+
+@Module
+@PerFragment
+class LoginFragmentModule {
+    @Provides
+    fun loginView(frag: LoginFragment): LoginView {
+        return frag
+    }
+
+    @Provides
+    fun provideLifecycleOwner(frag: LoginFragment): LifecycleOwner {
+        return frag
+    }
+
+    @Provides
+    fun provideCancelStrategy(owner: LifecycleOwner, jobs: Job): CancelStrategy {
+        return CancelStrategy(owner, jobs)
+    }
+ }

app/src/main/java/chat/rocket/android/authentication/di/LoginFragmentProvider.kt → app/src/main/java/chat/rocket/android/authentication/login/di/LoginFragmentProvider.kt

-package chat.rocket.android.authentication.di
+package chat.rocket.android.authentication.login.di
 
-import chat.rocket.android.authentication.ui.LoginFragment
+import chat.rocket.android.authentication.login.ui.LoginFragment
 import dagger.Module
 import dagger.android.ContributesAndroidInjector
 

app/src/main/java/chat/rocket/android/authentication/presentation/LoginPresenter.kt → app/src/main/java/chat/rocket/android/authentication/login/presentation/LoginPresenter.kt

-package chat.rocket.android.authentication.presentation
+package chat.rocket.android.authentication.login.presentation
 
 import chat.rocket.android.authentication.infraestructure.AuthTokenRepository
-import chat.rocket.common.RocketChatAuthException
+import chat.rocket.android.authentication.presentation.AuthenticationNavigator
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.util.launchUI
 import chat.rocket.common.RocketChatException
+import chat.rocket.common.RocketChatTwoFactorException
 import chat.rocket.common.util.PlatformLogger
 import chat.rocket.core.RocketChatClient
 import chat.rocket.core.internal.rest.login
-import kotlinx.coroutines.experimental.Job
-import kotlinx.coroutines.experimental.android.UI
-import kotlinx.coroutines.experimental.launch
 import okhttp3.HttpUrl
 import okhttp3.OkHttpClient
 import javax.inject.Inject
 
 class LoginPresenter @Inject constructor(private val view: LoginView,
+                                         private val strategy: CancelStrategy,
                                          private val navigator: AuthenticationNavigator,
                                          private val okHttpClient: OkHttpClient,
                                          private val logger: PlatformLogger,
                                          private val repository: AuthTokenRepository) {
 
-    var job: Job? = null
     val client: RocketChatClient = RocketChatClient.create {
         httpClient = okHttpClient
         restUrl = HttpUrl.parse(navigator.currentServer)!!
@@ -31,31 +31,23 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
     fun authenticate(username: String, password: String) {
         // TODO - validate input
 
-        job = launch(UI) {
-            view.showProgress()
+        launchUI(strategy) {
+            view.showLoading()
             try {
                 val token = client.login(username, password)
 
-                view.hideProgress()
                 navigator.toChatList()
             } catch (ex: RocketChatException) {
-                view.hideProgress()
                 when(ex) {
-                    is RocketChatAuthException ->
-                        if (ex.error?.contentEquals("totp-required") == true) {
+                    is RocketChatTwoFactorException ->
                         navigator.toTwoFA(navigator.currentServer!!, username, password)
-                        }
-                }
+                    else ->
                         view.onLoginError(ex.message)
                 }
+            } finally {
+                view.hideLoading()
             }
-
         }
-
-    fun unbind() {
-        job?.let {
-            it.cancel()
-        }.also { null }
     }
 
     fun signup() {

app/src/main/java/chat/rocket/android/authentication/login/presentation/LoginView.kt

+package chat.rocket.android.authentication.login.presentation
+
+import chat.rocket.android.core.behaviours.LoadingView
+
+interface LoginView : LoadingView {
+    fun onLoginError(message: String?)
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/ui/LoginFragment.kt → app/src/main/java/chat/rocket/android/authentication/login/ui/LoginFragment.kt

-package chat.rocket.android.authentication.ui
+package chat.rocket.android.authentication.login.ui
 
 import DrawableHelper
 import android.app.ProgressDialog
@@ -10,8 +10,8 @@ import android.widget.ScrollView
 import android.widget.Toast
 import chat.rocket.android.R
 import chat.rocket.android.app.KeyboardHelper
-import chat.rocket.android.authentication.presentation.LoginPresenter
-import chat.rocket.android.authentication.presentation.LoginView
+import chat.rocket.android.authentication.login.presentation.LoginPresenter
+import chat.rocket.android.authentication.login.presentation.LoginView
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_log_in.*
 import javax.inject.Inject
@@ -42,11 +42,6 @@ class LoginFragment : Fragment(), LoginView {
         serverUrl = arguments?.getString(SERVER_URL) ?: "https://open.rocket.chat"
     }
 
-    override fun onDestroy() {
-        presenter.unbind()
-        super.onDestroy()
-    }
-
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = inflater.inflate(R.layout.fragment_authentication_log_in, container, false)
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -201,12 +196,13 @@ class LoginFragment : Fragment(), LoginView {
         }, 1500)
     }
 
-    override fun showProgress() {
+    override fun showLoading() {
         // TODO - change for a proper progress indicator
-        progress = ProgressDialog.show(activity, "Authenticating", "Verifying user credentials")
+        progress = ProgressDialog.show(activity, "Authenticating",
+                "Verifying user credentials", true, true)
     }
 
-    override fun hideProgress() {
+    override fun hideLoading() {
         progress?.apply {
             cancel()
         }

app/src/main/java/chat/rocket/android/authentication/presentation/AuthenticationNavigator.kt

@@ -4,9 +4,9 @@ import android.content.Intent
 import chat.rocket.android.R
 import chat.rocket.android.app.MainActivity
 import chat.rocket.android.authentication.ui.AuthenticationActivity
-import chat.rocket.android.authentication.ui.LoginFragment
-import chat.rocket.android.authentication.ui.SignupFragment
-import chat.rocket.android.authentication.ui.TwoFAFragment
+import chat.rocket.android.authentication.login.ui.LoginFragment
+import chat.rocket.android.authentication.signup.ui.SignupFragment
+import chat.rocket.android.authentication.twofactor.ui.TwoFAFragment
 import chat.rocket.android.util.addFragmentBackStack
 
 class AuthenticationNavigator(internal val activity: AuthenticationActivity) {

app/src/main/java/chat/rocket/android/authentication/presentation/LoginView.kt

-package chat.rocket.android.authentication.presentation
-
-interface LoginView {
-    fun showProgress()
-    fun hideProgress()
-    fun onLoginError(message: String?)
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/presentation/ServerView.kt

-package chat.rocket.android.authentication.presentation
-
-interface ServerView
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/presentation/SignupView.kt

-package chat.rocket.android.authentication.presentation
-
-interface SignupView {
-    fun showProgress()
-    fun hideProgress()
-    fun onSignupError(message: String? = "Unknown error")
-}
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/presentation/TwoFAView.kt

-package chat.rocket.android.authentication.presentation
-
-interface TwoFAView : LoginView
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/di/ServerFragmentModule.kt → app/src/main/java/chat/rocket/android/authentication/server/di/ServerFragmentModule.kt

-package chat.rocket.android.authentication.di
+package chat.rocket.android.authentication.server.di
 
-import chat.rocket.android.authentication.presentation.ServerView
-import chat.rocket.android.authentication.ui.ServerFragment
+import chat.rocket.android.authentication.server.presentation.ServerView
+import chat.rocket.android.authentication.server.ui.ServerFragment
 import dagger.Module
 import dagger.Provides
 

app/src/main/java/chat/rocket/android/authentication/di/ServerFragmentProvider.kt → app/src/main/java/chat/rocket/android/authentication/server/di/ServerFragmentProvider.kt

-package chat.rocket.android.authentication.di
+package chat.rocket.android.authentication.server.di
 
-import chat.rocket.android.authentication.ui.ServerFragment
+import chat.rocket.android.authentication.server.ui.ServerFragment
 import dagger.Module
 import dagger.android.ContributesAndroidInjector
 

app/src/main/java/chat/rocket/android/authentication/presentation/ServerPresenter.kt → app/src/main/java/chat/rocket/android/authentication/server/presentation/ServerPresenter.kt

-package chat.rocket.android.authentication.presentation
+package chat.rocket.android.authentication.server.presentation
 
+import chat.rocket.android.authentication.presentation.AuthenticationNavigator
 import javax.inject.Inject
 
 class ServerPresenter @Inject constructor(private val view: ServerView,

app/src/main/java/chat/rocket/android/authentication/server/presentation/ServerView.kt

+package chat.rocket.android.authentication.server.presentation
+
+interface ServerView
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/ui/ServerFragment.kt → app/src/main/java/chat/rocket/android/authentication/server/ui/ServerFragment.kt

-package chat.rocket.android.authentication.ui
+package chat.rocket.android.authentication.server.ui
 
 import android.os.Bundle
 import android.support.v4.app.Fragment
@@ -7,8 +7,8 @@ import android.view.View
 import android.view.ViewGroup
 import android.view.WindowManager
 import chat.rocket.android.R
-import chat.rocket.android.authentication.presentation.ServerPresenter
-import chat.rocket.android.authentication.presentation.ServerView
+import chat.rocket.android.authentication.server.presentation.ServerPresenter
+import chat.rocket.android.authentication.server.presentation.ServerView
 import chat.rocket.android.util.ifEmpty
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_server.*

app/src/main/java/chat/rocket/android/authentication/signup/di/SignupFragmentModule.kt

+package chat.rocket.android.authentication.signup.di
+
+import android.arch.lifecycle.LifecycleOwner
+import chat.rocket.android.authentication.signup.presentation.SignupView
+import chat.rocket.android.authentication.signup.ui.SignupFragment
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.dagger.scope.PerFragment
+import dagger.Module
+import dagger.Provides
+import kotlinx.coroutines.experimental.Job
+
+@Module
+@PerFragment
+class SignupFragmentModule {
+    @Provides
+    fun signupView(frag: SignupFragment): SignupView {
+        return frag
+    }
+
+    @Provides
+    fun provideLifecycleOwner(frag: SignupFragment): LifecycleOwner {
+        return frag
+    }
+
+    @Provides
+    fun provideCancelStrategy(owner: LifecycleOwner, jobs: Job): CancelStrategy {
+        return CancelStrategy(owner, jobs)
+    }
+}

app/src/main/java/chat/rocket/android/authentication/di/SignupFragmentProvider.kt → app/src/main/java/chat/rocket/android/authentication/signup/di/SignupFragmentProvider.kt

-package chat.rocket.android.authentication.di
+package chat.rocket.android.authentication.signup.di
 
-import chat.rocket.android.authentication.ui.SignupFragment
+import chat.rocket.android.authentication.signup.ui.SignupFragment
 import dagger.Module
 import dagger.android.ContributesAndroidInjector
 

app/src/main/java/chat/rocket/android/authentication/presentation/SignupPresenter.kt → app/src/main/java/chat/rocket/android/authentication/signup/presentation/SignupPresenter.kt

-package chat.rocket.android.authentication.presentation
+package chat.rocket.android.authentication.signup.presentation
 
 import chat.rocket.android.authentication.infraestructure.AuthTokenRepository
+import chat.rocket.android.authentication.presentation.AuthenticationNavigator
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.util.launchUI
 import chat.rocket.common.RocketChatException
 import chat.rocket.common.util.PlatformLogger
 import chat.rocket.core.RocketChatClient
 import chat.rocket.core.internal.rest.login
 import chat.rocket.core.internal.rest.signup
-import kotlinx.coroutines.experimental.Job
-import kotlinx.coroutines.experimental.android.UI
-import kotlinx.coroutines.experimental.launch
 import okhttp3.HttpUrl
 import okhttp3.OkHttpClient
 import timber.log.Timber
 import javax.inject.Inject
 
 class SignupPresenter @Inject constructor(private val view: SignupView,
+                                          private val strategy: CancelStrategy,
                                           private val navigator: AuthenticationNavigator,
                                           private val okHttpClient: OkHttpClient,
                                           private val logger: PlatformLogger,
                                           private val repository: AuthTokenRepository) {
 
-    var job: Job? = null
     val client: RocketChatClient = RocketChatClient.create {
         httpClient = okHttpClient
         restUrl = HttpUrl.parse(navigator.currentServer)!!
@@ -32,8 +32,8 @@ class SignupPresenter @Inject constructor(private val view: SignupView,
     fun signup(email: String, name: String, username: String, password: String) {
         // TODO - validate input
 
-        job = launch(UI) {
-            view.showProgress()
+        launchUI(strategy) {
+            view.showLoading()
 
             try {
                 val user = client.signup(email, name, username, password)
@@ -42,18 +42,12 @@ class SignupPresenter @Inject constructor(private val view: SignupView,
                 val token = client.login(username, password)
                 Timber.d("Logged in: $token")
 
-                view.hideProgress()
                 navigator.toChatList()
             } catch (ex: RocketChatException) {
-                view.hideProgress()
                 view.onSignupError(ex.message)
+            } finally {
+                view.hideLoading()
             }
         }
     }
-
-    fun unbind() {
-        job?.let {
-            it.cancel()
-        }.also { null }
-    }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/signup/presentation/SignupView.kt

+package chat.rocket.android.authentication.signup.presentation
+
+import chat.rocket.android.core.behaviours.LoadingView
+
+interface SignupView : LoadingView {
+    fun onSignupError(message: String? = "Unknown error")
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/ui/SignupFragment.kt → app/src/main/java/chat/rocket/android/authentication/signup/ui/SignupFragment.kt

-package chat.rocket.android.authentication.ui
+package chat.rocket.android.authentication.signup.ui
 
 import DrawableHelper
 import android.app.ProgressDialog
@@ -9,8 +9,8 @@ import android.view.*
 import android.widget.Toast
 import chat.rocket.android.R
 import chat.rocket.android.app.KeyboardHelper
-import chat.rocket.android.authentication.presentation.SignupPresenter
-import chat.rocket.android.authentication.presentation.SignupView
+import chat.rocket.android.authentication.signup.presentation.SignupPresenter
+import chat.rocket.android.authentication.signup.presentation.SignupView
 import chat.rocket.android.util.content
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_sign_up.*
@@ -41,11 +41,6 @@ class SignupFragment : Fragment(), SignupView {
         serverUrl = arguments?.getString(SERVER_URL) ?: "https://open.rocket.chat"
     }
 
-    override fun onDestroy() {
-        presenter.unbind()
-        super.onDestroy()
-    }
-
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = inflater.inflate(R.layout.fragment_authentication_sign_up, container, false)
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -100,12 +95,13 @@ class SignupFragment : Fragment(), SignupView {
         }
     }
 
-    override fun showProgress() {
+    override fun showLoading() {
         // TODO - change for a proper progress indicator
-        progress = ProgressDialog.show(activity, "Authenticating", "Registering user")
+        progress = ProgressDialog.show(activity, "Authenticating",
+                "Registering user", true, true)
     }
 
-    override fun hideProgress() {
+    override fun hideLoading() {
         progress?.apply {
             cancel()
         }

app/src/main/java/chat/rocket/android/authentication/twofactor/di/TwoFAFragmentModule.kt

+package chat.rocket.android.authentication.twofactor.di
+
+import android.arch.lifecycle.LifecycleOwner
+import chat.rocket.android.authentication.twofactor.presentation.TwoFAView
+import chat.rocket.android.authentication.twofactor.ui.TwoFAFragment
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.dagger.scope.PerFragment
+import dagger.Module
+import dagger.Provides
+import kotlinx.coroutines.experimental.Job
+
+@Module
+@PerFragment
+class TwoFAFragmentModule {
+    @Provides
+    fun loginView(frag: TwoFAFragment): TwoFAView {
+        return frag
+    }
+
+    @Provides
+    fun provideLifecycleOwner(frag: TwoFAFragment): LifecycleOwner {
+        return frag
+    }
+
+    @Provides
+    fun provideCancelStrategy(owner: LifecycleOwner, jobs: Job): CancelStrategy {
+        return CancelStrategy(owner, jobs)
+    }
+}

app/src/main/java/chat/rocket/android/authentication/di/TwoFAFragmentProvider.kt → app/src/main/java/chat/rocket/android/authentication/twofactor/di/TwoFAFragmentProvider.kt

-package chat.rocket.android.authentication.di
+package chat.rocket.android.authentication.twofactor.di
 
-import chat.rocket.android.authentication.ui.TwoFAFragment
+import chat.rocket.android.authentication.twofactor.ui.TwoFAFragment
 import dagger.Module
 import dagger.android.ContributesAndroidInjector
 

app/src/main/java/chat/rocket/android/authentication/presentation/TwoFAPresenter.kt → app/src/main/java/chat/rocket/android/authentication/twofactor/presentation/TwoFAPresenter.kt

-package chat.rocket.android.authentication.presentation
+package chat.rocket.android.authentication.twofactor.presentation
 
 import chat.rocket.android.authentication.infraestructure.AuthTokenRepository
+import chat.rocket.android.authentication.presentation.AuthenticationNavigator
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import chat.rocket.android.util.launchUI
 import chat.rocket.common.RocketChatException
 import chat.rocket.common.util.PlatformLogger
 import chat.rocket.core.RocketChatClient
 import chat.rocket.core.internal.rest.login
-import kotlinx.coroutines.experimental.Job
-import kotlinx.coroutines.experimental.android.UI
-import kotlinx.coroutines.experimental.launch
 import okhttp3.HttpUrl
 import okhttp3.OkHttpClient
 import javax.inject.Inject
 
 class TwoFAPresenter @Inject constructor(private val view: TwoFAView,
+                                         private val strategy: CancelStrategy,
                                          private val navigator: AuthenticationNavigator,
                                          private val okHttpClient: OkHttpClient,
                                          private val logger: PlatformLogger,
                                          private val repository: AuthTokenRepository) {
 
-    var job: Job? = null
     val client: RocketChatClient = RocketChatClient.create {
         httpClient = okHttpClient
         restUrl = HttpUrl.parse(navigator.currentServer)!!
@@ -30,25 +30,18 @@ class TwoFAPresenter @Inject constructor(private val view: TwoFAView,
     fun authenticate(username: String, password: String, pin: String) {
         // TODO - validate input
 
-        job = launch(UI) {
-            view.showProgress()
+        launchUI(strategy) {
+            view.showLoading()
             try {
                 val token = client.login(username, password, pin)
 
-                view.hideProgress()
                 navigator.toChatList()
             } catch (ex: RocketChatException) {
-                view.hideProgress()
                 view.onLoginError(ex.message)
+            } finally {
+                view.hideLoading()
             }
         }
-
-    }
-
-    fun unbind() {
-        job?.let {
-            it.cancel()
-        }.also { null }
     }
 
     fun signup() {

app/src/main/java/chat/rocket/android/authentication/twofactor/presentation/TwoFAView.kt

+package chat.rocket.android.authentication.twofactor.presentation
+
+import chat.rocket.android.authentication.login.presentation.LoginView
+
+interface TwoFAView : LoginView
\ No newline at end of file

app/src/main/java/chat/rocket/android/authentication/ui/TwoFAFragment.kt → app/src/main/java/chat/rocket/android/authentication/twofactor/ui/TwoFAFragment.kt

-package chat.rocket.android.authentication.ui
+package chat.rocket.android.authentication.twofactor.ui
 
 import DrawableHelper
 import android.app.ProgressDialog
@@ -11,8 +11,8 @@ import android.view.ViewGroup
 import android.view.WindowManager
 import android.widget.Toast
 import chat.rocket.android.R
-import chat.rocket.android.authentication.presentation.TwoFAPresenter
-import chat.rocket.android.authentication.presentation.TwoFAView
+import chat.rocket.android.authentication.twofactor.presentation.TwoFAPresenter
+import chat.rocket.android.authentication.twofactor.presentation.TwoFAView
 import chat.rocket.android.util.content
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_two_fa.*
@@ -52,12 +52,6 @@ class TwoFAFragment : Fragment(), TwoFAView {
         password = arguments?.getString(PASSWORD) ?: ""
     }
 
-    override fun onDestroy() {
-        presenter.unbind()
-        super.onDestroy()
-    }
-
-
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = inflater.inflate(R.layout.fragment_authentication_two_fa, container, false)
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -84,12 +78,13 @@ class TwoFAFragment : Fragment(), TwoFAView {
         }
     }
 
-    override fun showProgress() {
+    override fun showLoading() {
         // TODO - change for a proper progress indicator
-        progress = ProgressDialog.show(activity, "Authenticating", "Verifying user credentials")
+        progress = ProgressDialog.show(activity, "Authenticating",
+                "Verifying user credentials", true, true)
     }
 
-    override fun hideProgress() {
+    override fun hideLoading() {
         progress?.apply {
             cancel()
         }

app/src/main/java/chat/rocket/android/authentication/ui/AuthenticationActivity.kt

@@ -5,6 +5,7 @@ import android.support.v4.app.Fragment
 import android.support.v7.app.AppCompatActivity
 import chat.rocket.android.R
 import chat.rocket.android.app.LayoutHelper
+import chat.rocket.android.authentication.server.ui.ServerFragment
 import chat.rocket.android.util.addFragment
 import dagger.android.AndroidInjection
 import dagger.android.AndroidInjector

app/src/main/java/chat/rocket/android/core/behaviours/LoadingView.kt

+package chat.rocket.android.core.behaviours
+
+interface LoadingView {
+    fun showLoading()
+    fun hideLoading()
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/core/lifecycle/CancelStrategy.kt

+package chat.rocket.android.core.lifecycle
+
+import android.arch.lifecycle.Lifecycle
+import android.arch.lifecycle.LifecycleObserver
+import android.arch.lifecycle.LifecycleOwner
+import android.arch.lifecycle.OnLifecycleEvent
+import kotlinx.coroutines.experimental.Job
+import javax.inject.Inject
+
+class CancelStrategy @Inject constructor(owner: LifecycleOwner, val jobs: Job) : LifecycleObserver {
+    init {
+        owner.lifecycle.addObserver(this)
+    }
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
+    fun onDestroy() {
+        jobs.cancel()
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/dagger/module/ActivityBuilder.kt

@@ -2,6 +2,10 @@ package chat.rocket.android.dagger.module
 
 import chat.rocket.android.app.MainActivity
 import chat.rocket.android.authentication.di.*
+import chat.rocket.android.authentication.login.di.LoginFragmentProvider
+import chat.rocket.android.authentication.server.di.ServerFragmentProvider
+import chat.rocket.android.authentication.signup.di.SignupFragmentProvider
+import chat.rocket.android.authentication.twofactor.di.TwoFAFragmentProvider
 import chat.rocket.android.authentication.ui.AuthenticationActivity
 import chat.rocket.android.dagger.scope.PerActivity
 import dagger.Module

app/src/main/java/chat/rocket/android/util/Coroutines.kt

+package chat.rocket.android.util
+
+import chat.rocket.android.core.lifecycle.CancelStrategy
+import kotlinx.coroutines.experimental.CoroutineScope
+import kotlinx.coroutines.experimental.Job
+import kotlinx.coroutines.experimental.android.UI
+import kotlinx.coroutines.experimental.launch
+
+/**
+ * Launches a coroutine on the UI context.
+ *
+ * @param strategy a CancelStrategy for canceling the coroutine job
+ */
+fun launchUI(strategy: CancelStrategy, block: suspend CoroutineScope.() -> Unit): Job {
+    return launch(context = UI, parent = strategy.jobs, block = block)
+}
\ No newline at end of file

dependencies.gradle

@@ -7,7 +7,7 @@ ext {
         targetSdk         : 27,
         buildTools        : '27.0.0',
         kotlin            : '1.2.0',
-        coroutine         : '0.19.3',
+        coroutine         : '0.20',
         dokka             : '0.9.15',
 
         // Main dependencies