provide clear cache functionality

app/src/main/java/com/biganto/visual/roompark/data/data_provider/FilesRepository.kt

@@ -30,6 +30,8 @@ class FilesContractModule @Inject constructor(
         return FileModule.getDirectory(context,d)
     }
 
+    override fun deleteAllFiles() = files.deleteAllCacheObservable()
+
     override fun getPlansSize() = getFile<FileModule.FileDirectory.PlanTypeDir>().folderSize
 
     override fun getToursSize() = getFile<FileModule.FileDirectory.ToursDir>().folderSize

app/src/main/java/com/biganto/visual/roompark/data/repository/file/FileModule.kt

@@ -6,6 +6,7 @@ import android.os.Environment
 import com.biganto.visual.roompark.util.extensions.asInt
 import com.google.gson.JsonElement
 import dagger.Module
+import io.reactivex.Observable
 import timber.log.Timber
 import java.io.File
 import javax.inject.Inject
@@ -61,7 +62,24 @@ class FileModule @Inject constructor(val context: Application) {
 
     fun deleteFile(uri:String)= getFile(uri).delete()
 
+    fun deleteAllCacheObservable() =
+        Observable.create<Pair<Int, Int>> {emitter ->
+            val foldersToDelete = listOf(
+                FileDirectory.Albums().dir,
+                FileDirectory.FeedsDir().dir,
+                FileDirectory.PlanTypeDir().dir,
+                FileDirectory.ToursDir().dir
+            )
+            foldersToDelete.forEachIndexed{ index,dir ->
+                if (File(dir).deleteRecursively())
+                    emitter.onNext(Pair(index,foldersToDelete.size))
+                else emitter.onError(error("Error occurred on files deleting!"))
+            }
+            emitter.onComplete()
+        }
+
     val getCoreCacheDirectory:String
+
     get(){
         return rootFolder.absolutePath
     }

app/src/main/java/com/biganto/visual/roompark/domain/contract/FilesContract.kt

 package com.biganto.visual.roompark.domain.contract
 
+import io.reactivex.Observable
+
 /**
  * Created by Vladislav Bogdashkin on 24.09.2019.
  */
@@ -11,4 +13,5 @@ interface FilesContract{
     fun getFeedSize(): Long
     fun getToursSize(): Long
     fun getPlansSize(): Long
+    fun deleteAllFiles(): Observable<Pair<Int, Int>>
 }
\ No newline at end of file

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

@@ -47,6 +47,8 @@ class SettingsInteractor @Inject constructor(
             CachedDataModel(activity.resources.getString(R.string.overall_cache),it,0)
         }
 
+    fun deleteCacheFiles() = settingsUseCase.clearAllCache()
+
     fun getCacheInfo() =
         Observable.concatArray(plans, tours, feeds, albums, overall).toList().toObservable()
 

app/src/main/java/com/biganto/visual/roompark/domain/use_case/settingsUseCase.kt

@@ -16,6 +16,8 @@ class SettingsUseCase @Inject constructor(
 ){
     fun signOut() = authContract.signOut()
 
+    fun clearAllCache() = fileContract.deleteAllFiles()
+
     val planTypesSize
             get() = Observable.just(fileContract.getPlansSize())
 

app/src/main/java/com/biganto/visual/roompark/presentation/screen/settings/ScreenContract.kt

@@ -9,5 +9,6 @@ import io.reactivex.Observable
 
 interface SettingsScreen : BigantoBaseContract<SettingsScreenViewState> {
     fun signOut(): Observable<Int>
+    fun clearCache(): Observable<Int>
 }
 

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

@@ -23,6 +23,7 @@ import com.jakewharton.rxbinding3.view.clicks
 import io.reactivex.Observable
 import io.reactivex.android.schedulers.AndroidSchedulers
 import timber.log.Timber
+import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
 /**
@@ -40,6 +41,13 @@ class SettingsScreenController :
             .map { Timber.d("Clicked sign out button"); 1 }
             .observeOn(AndroidSchedulers.mainThread())
 
+    override fun clearCache(): Observable<Int> =
+        clearCacheButton.clicks()
+            .debounce ( 500, TimeUnit.MICROSECONDS )
+            .map { Timber.d("Clicked clear cache button"); 1 }
+            .observeOn(AndroidSchedulers.mainThread())
+
+
     override fun injectDependencies() {
         getComponent()
     }
@@ -72,6 +80,10 @@ class SettingsScreenController :
     @BindView(R.id.signOutButton)
     lateinit var signOutButton:MaterialTextView
 
+    @BindView(R.id.clear_cache_button)
+    lateinit var clearCacheButton:MaterialTextView
+
+
     private fun setToolbar(){
         toolBar.appBar.liftOnScrollTargetViewId = R.id.nestedScrollContainer
         pushRecycler.isNestedScrollingEnabled = false

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

@@ -42,10 +42,23 @@ class SettingsScreenPresenter @Inject constructor(
                     .onErrorReturn(::parseError)
             }
 
+        val onClearCache = intent(SettingsScreen::clearCache)
+            .flatMap {
+                interactor.deleteCacheFiles()
+                    .map<SettingsScreenViewState>{
+                        SettingsScreenViewState.OnCacheDeleting(
+                            it.first/it.second.toFloat()
+                        )
+                    }
+                    .startWith(SettingsScreenViewState.OnCacheDeleting(0f))
+                    .onErrorReturn(::parseError)
+            }
+
 
         val state = restoreStateObservable
             .mergeWith(fetchSettings)
             .mergeWith(onSignOut)
+            .mergeWith(onClearCache)
             .doOnError{ Timber.e(it)}
             .subscribeOn(Schedulers.io())
             .onErrorReturn(::parseError)

app/src/main/java/com/biganto/visual/roompark/presentation/screen/settings/ScreenViewState.kt

@@ -15,4 +15,5 @@ sealed class SettingsScreenViewState : BigantoBaseViewState() {
 //    class LoadCachedInfo(val cached:SettingsModel) : SettingsScreenViewState()
     class SomeError(val exception: ExceptionString) : SettingsScreenViewState()
     class SignOut() : SettingsScreenViewState()
+    class OnCacheDeleting(val progress:Float) : SettingsScreenViewState()
 }
\ No newline at end of file

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

@@ -123,7 +123,8 @@
             tools:listitem="@layout/text_description_viewholder" />
 
         <com.google.android.material.textview.MaterialTextView
-            style="@style/Default_TextView.Cancel_Text"
+            android:id="@+id/clear_cache_button"
+            style="@style/Default_TextView.Clear_Cache_Text"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_margin="32dp" />
@@ -142,10 +143,9 @@
 
         <com.google.android.material.textview.MaterialTextView
             android:id="@+id/signOutButton"
-            style="@style/Default_TextView.Cancel_Text"
+            style="@style/Default_TextView.Sign_Out_Text"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_margin="32dp"
-            android:text="СМЕНИТЬ АККАУНТ" />
+            android:layout_margin="32dp" />
     </LinearLayout>
 </androidx.core.widget.NestedScrollView>
\ No newline at end of file

app/src/main/res/values/styles.xml

@@ -317,6 +317,19 @@
         <item name="android:textColor">@color/colorError</item>
     </style>
 
+    <style name="Default_TextView.Clear_Cache_Text">
+        <item name="android:text">"ОЧИСТИТЬ КЭШ"</item>
+        <item name="android:gravity">center</item>
+        <item name="android:textColor">@color/colorError</item>
+    </style>
+
+    <style name="Default_TextView.Sign_Out_Text">
+        <item name="android:text">"СМЕНИТЬ АККАУНТ"</item>
+        <item name="android:gravity">center</item>
+        <item name="android:textColor">@color/colorError</item>
+    </style>
+
+
     <style name="Default_TextView.Notice_Text">
         <item name="android:textColor">@color/colorNoticeText</item>
     </style>