restoreObservable should be on detachView neither than on attachView method

app/src/main/java/com/biganto/visual/roompark/base/RoomParkMainActivity.kt

@@ -66,6 +66,8 @@ class RoomParkMainActivity(
         router = Conductor.attachRouter(this, conductorContainer, savedInstanceState)
 
         router.setRoot(RouterTransaction.with(SplashScreenController()))
+
+        headerToolbarBack.setOnClickListener {onBackPressed()}
     }
 
     override fun displayBackButton(show: Boolean) {
@@ -89,6 +91,7 @@ class RoomParkMainActivity(
     override val headerToolbarBack
         get() = headerToolbar.findViewById<MaterialTextView>(R.id.back_button_chevron)
 
+
     override fun setToolbar(header:HeaderToolbarModel?,status:StatusToolbarModel?){
         appBar.setExpanded(false,false)
         if (header == null && status == null){

app/src/main/java/com/biganto/visual/roompark/domain/interactor/article.kt

@@ -16,6 +16,7 @@ class ArticleInteractor @Inject constructor(
 
     fun fetchArticle(articleId: Int): Observable<ArticleModel> =
         uc.getArticle(articleId)
+
 //        Single.just(
 //        when (articleId) {
 //            2 -> article2

app/src/main/java/com/biganto/visual/roompark/domain/interactor/articles.kt

 package com.biganto.visual.roompark.domain.interactor
 
-import com.biganto.visual.roompark.domain.model.ArticlesPreviewModel
-import io.reactivex.Single
+import com.biganto.visual.roompark.domain.use_case.FeedUseCase
 import javax.inject.Inject
 
 /**
@@ -9,16 +8,11 @@ import javax.inject.Inject
  */
 
 class ArticlesInteractor @Inject constructor(
+    private val uc: FeedUseCase
 ) {
 
-    fun fetchArticles(feedAlias: String): Single<ArticlesPreviewModel> = Single.just(
-        when (feedAlias) {
-            "news" -> FeedsInteractor.testNewsArticles
-            "blog" -> FeedsInteractor.testBlogsArticles
-            "constructors_blog" -> FeedsInteractor.testDevArticles
-            else -> error("unknown feedId")
-        }
-    )
+    fun fetchArticles(feed:String) =
+        uc.getArticles(feed)
 }
 
 

app/src/main/java/com/biganto/visual/roompark/presentation/screen/deal/ScreenController.kt

@@ -132,15 +132,6 @@ class DealScreenController :
                         )
                 }
         )
-
-        toolBar.headerToolbarBack?.let {
-            detachDisposable.add(
-                it.clicks()
-                    .doOnNext { Timber.d("clicked: 1") }
-                    .subscribeOn(AndroidSchedulers.mainThread())
-                    .subscribe { handleBack() }
-            )
-        }
     }
 
     private fun setToolbar(){

app/src/main/java/com/biganto/visual/roompark/presentation/screen/feed_list/ScreenController.kt

 package com.biganto.visual.roompark.presentation.screen.feed_list
 
 import android.view.View
+import android.widget.ProgressBar
 import androidx.core.os.bundleOf
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -12,8 +13,10 @@ import com.biganto.visual.roompark.base.RoomParkMainActivity
 import com.biganto.visual.roompark.conductor.BigantoBaseController
 import com.biganto.visual.roompark.presentation.screen.article.ArticleScreenController
 import com.biganto.visual.roompark.presentation.screen.feed_list.util.ArticlesAdapter
+import com.biganto.visual.roompark.util.extensions.setGone
 import com.biganto.visual.roompark.util.view_utils.grid.CeilsDecoration
 import com.bluelinelabs.conductor.RouterTransaction
+import com.google.android.material.textview.MaterialTextView
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -44,6 +47,12 @@ class ArticlesScreenController  :
     @BindView(R.id.articles_recycler_view)
     lateinit var articlesRecyclerView: RecyclerView
 
+    @BindView(R.id.progress_bar_view)
+    lateinit var progressBar: ProgressBar
+
+    @BindView(R.id.empty_list_text_view)
+    lateinit var emptyListNotice: MaterialTextView
+
 
     private fun setToolbar() {
         articlesRecyclerView.isNestedScrollingEnabled = false
@@ -102,14 +111,32 @@ class ArticlesScreenController  :
     }
 
     private fun render(viewState: ArticlesScreenViewState.Idle){
-
+        progressBar.setGone(false)
+        emptyListNotice.setGone(true)
+        articlesRecyclerView.setGone(true)
     }
 
-    private fun render(viewState: ArticlesScreenViewState.SomeError) =
+    private fun render(viewState: ArticlesScreenViewState.SomeError) {
         showError(viewState.exception)
+        progressBar.setGone(true)
+    }
+
 
     private fun render(viewState: ArticlesScreenViewState.ArticlesLoaded) {
-        (articlesRecyclerView.adapter as ArticlesAdapter).setItems(viewState.items)
+        progressBar.setGone(true)
+        emptyListNotice.setGone(true)
+        articlesRecyclerView.setGone(true)
+        if (viewState.items.isNullOrEmpty())
+        {
+            emptyListNotice.setGone(false)
+            articlesRecyclerView.setGone(true)
+        }
+        else{
+            emptyListNotice.setGone(true)
+            articlesRecyclerView.setGone(false)
+            (articlesRecyclerView.adapter as ArticlesAdapter).setItems(viewState.items)
+        }
+
     }
 
     private fun getComponent() = DaggerArticlesScreenComponent.factory()

app/src/main/java/com/biganto/visual/roompark/presentation/screen/feed_list/ScreenPresenter.kt

@@ -3,6 +3,7 @@ package com.biganto.visual.roompark.presentation.screen.feed_list
 import com.biganto.visual.roompark.conductor.BigantoBasePresenter
 import com.biganto.visual.roompark.domain.interactor.ArticlesInteractor
 import com.biganto.visual.roompark.util.monades.ExceptionString
+import io.reactivex.Observable
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
 import timber.log.Timber
@@ -27,7 +28,8 @@ class ArticlesScreenPresenter @Inject constructor(
         Timber.d("feedId : $feedId")
 
         val prefetchCards = interactor.fetchArticles(feedId)
-            .map { ArticlesScreenViewState.ArticlesLoaded(it.articles) }
+            .map<ArticlesScreenViewState>{ ArticlesScreenViewState.ArticlesLoaded(it.articles) }
+            .startWith(Observable.just<ArticlesScreenViewState>(ArticlesScreenViewState.Idle()))
 
         val state = restoreStateObservable
             .mergeWith(prefetchCards)

app/src/main/java/com/biganto/visual/roompark/presentation/screen/feeds/ScreenController.kt

@@ -47,24 +47,22 @@ class FeedsScreenController  :
 
     override fun onCameraSelected(): Observable<WebCamModel> =
         (camsRecyclerView.adapter as CamsListAdapter).onItemClicked
-            .debounce (120L, TimeUnit.MILLISECONDS)
-            .observeOn(AndroidSchedulers.mainThread())
-
+            .debounce (1220L, TimeUnit.MILLISECONDS)
 
     override fun onArticleSelected(): Observable<ArticlePreviewModel> =
         (feedsRecyclerView.adapter as ArticlesPreviewAdapter).onItemClicked
-            .debounce (120L, TimeUnit.MILLISECONDS)
-            .observeOn(AndroidSchedulers.mainThread())
+            .debounce (1220L, TimeUnit.MILLISECONDS)
 
 
     override fun onAlbumSelected(): Observable<AlbumPreviewModel> =
         (devProgressRecyclerView.adapter as AlbumsPreviewAdapter).onItemClicked
-            .debounce (120L, TimeUnit.MILLISECONDS)
-            .observeOn(AndroidSchedulers.mainThread())
+            .debounce (1220L, TimeUnit.MILLISECONDS)
 
     override fun feedsTabSelected(): Observable<String>
             = feedsTabs.selections()
+        .filter { it.position>= 0 && it.position<storedFeedsList.size }
         .debounce (200L, TimeUnit.MILLISECONDS)
+        .doOnNext { Timber.d("it.position ${it.position}") }
         .map { it.position }
         .map { storedFeedsList[it].alias }
         .observeOn(AndroidSchedulers.mainThread())
@@ -146,7 +144,7 @@ class FeedsScreenController  :
     }
 
     override fun render(viewState: FeedsScreenViewState) {
-        super.render(viewState)
+//        super.render(viewState)
         Timber.d("Render state $viewState")
         when(viewState){
             is FeedsScreenViewState.Idle -> render(viewState)

app/src/main/java/com/biganto/visual/roompark/presentation/screen/feeds/ScreenPresenter.kt

@@ -3,6 +3,7 @@ package com.biganto.visual.roompark.presentation.screen.feeds
 import com.biganto.visual.roompark.conductor.BigantoBasePresenter
 import com.biganto.visual.roompark.domain.interactor.FeedsInteractor
 import com.biganto.visual.roompark.util.monades.ExceptionString
+import io.reactivex.Observable
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
 import timber.log.Timber
@@ -32,10 +33,15 @@ class FeedsScreenPresenter @Inject constructor(
 
     override fun attachView(view: FeedsScreen) {
         Timber.d("AttachView ")
-        restoreStateObservable.accept(FeedsScreenViewState.RestoreView(restoreModel))
+
         super.attachView(view)
     }
 
+    override fun detachView() {
+        super.detachView()
+        restoreStateObservable.accept(FeedsScreenViewState.RestoreView(restoreModel))
+    }
+
     override fun bindIntents() {
 
         val fetchCams = interactor.fetchCams()
@@ -69,10 +75,8 @@ class FeedsScreenPresenter @Inject constructor(
             .onErrorReturn (::parseError)
 
         val  switchToAllArtiles = intent(FeedsScreen::onAllFeedArticles)
-            .map<FeedsScreenViewState> {
-                FeedsScreenViewState.ToArticlesScreen(it.alias)
-            }
-            .onErrorReturn (::parseError)
+            .flatMap{ Observable.defer{Observable.just<FeedsScreenViewState>(
+                FeedsScreenViewState.ToArticlesScreen(it.alias)) }}
 
         val  selectCamera = intent(FeedsScreen::onCameraSelected)
             .map<FeedsScreenViewState> {
@@ -99,8 +103,9 @@ class FeedsScreenPresenter @Inject constructor(
             }
             .onErrorReturn (::parseError)
 
-        val state = restoreStateObservable
-            .mergeWith(fetchFeeds)
+        val state =
+
+        fetchFeeds
             .mergeWith(getFeedArticlesPreview)
             .mergeWith(fetchAlbums)
             .mergeWith(fetchCams)
@@ -109,6 +114,7 @@ class FeedsScreenPresenter @Inject constructor(
             .mergeWith(selectCamera)
             .mergeWith(selectAlbum)
             .mergeWith(selectArticle)
+            .mergeWith(restoreStateObservable)
             .doOnError{ Timber.e(it)}
             .subscribeOn(Schedulers.io())
             .observeOn(AndroidSchedulers.mainThread())

app/src/main/res/drawable/ic_chevron_left.xml

@@ -4,6 +4,6 @@
     android:viewportWidth="24"
     android:viewportHeight="24">
   <path
-      android:fillColor="#FF000000"
+      android:fillColor="@color/colorAccent"
       android:pathData="M15.41,7.41L14,6l-6,6 6,6 1.41,-1.41L10.83,12z"/>
 </vector>

app/src/main/res/layout/feed_direct_screen.xml

@@ -6,6 +6,22 @@
     android:background="@color/colorNoticeBackground"
     android:orientation="vertical">
 
+    <ProgressBar
+        android:id="@+id/progress_bar_view"
+        style="?android:attr/progressBarStyle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp" />
+
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/empty_list_text_view"
+        style="@style/Common_Text.Notice"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Нет элементов"
+        android:textAlignment="center" />
+
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/articles_recycler_view"
         android:layout_width="match_parent"

app/src/main/res/layout/feed_direct_viewholder.xml

@@ -14,7 +14,6 @@
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
         android:layout_marginBottom="16dp"
-        android:background="@color/colorAccentSecondary"
         app:image_corner_radius="4dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/feed_title_info_text_view"

app/src/main/res/layout/switch_toolbar.xml

@@ -18,7 +18,6 @@
         android:gravity="start|center_vertical"
         android:text="МОИ \nСДЕЛКИ"
         android:textAlignment="gravity"
-        app:drawableTint="@color/colorAccent"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
@@ -34,7 +33,6 @@
         android:fitsSystemWindows="true"
         android:gravity="start|center_vertical"
         android:includeFontPadding="true"
-        android:text="Ffff"
         android:textAlignment="gravity"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/include13"