[LeakCanary] ForYou*: Refactor to use viewBinding and viewModels

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/store/view/ui/commons/ForYouFragment.kt

@@ -20,32 +20,32 @@
 package com.aurora.store.view.ui.commons
 
 import android.os.Bundle
-import android.view.LayoutInflater
 import android.view.View
-import android.view.ViewGroup
-import androidx.lifecycle.ViewModelProvider
+import androidx.fragment.app.viewModels
 import com.aurora.Constants
 import com.aurora.gplayapi.data.models.App
 import com.aurora.gplayapi.data.models.StreamBundle
 import com.aurora.gplayapi.data.models.StreamCluster
+import com.aurora.gplayapi.helpers.StreamHelper.Category
+import com.aurora.gplayapi.helpers.StreamHelper.Type
 import com.aurora.store.R
 import com.aurora.store.data.ViewState
 import com.aurora.store.databinding.FragmentForYouBinding
 import com.aurora.store.view.custom.recycler.EndlessRecyclerOnScrollListener
 import com.aurora.store.view.epoxy.controller.GenericCarouselController
-import com.aurora.store.viewmodel.homestream.AppsForYouViewModel
 import com.aurora.store.viewmodel.homestream.BaseClusterViewModel
-import com.aurora.store.viewmodel.homestream.GamesForYouViewModel
 
 
-class ForYouFragment : BaseFragment(), GenericCarouselController.Callbacks {
+class ForYouFragment : BaseFragment(R.layout.fragment_for_you),
+    GenericCarouselController.Callbacks {
+
+    private var _binding: FragmentForYouBinding? = null
+    private val binding get() = _binding!!
+
+    private val viewModel: BaseClusterViewModel by viewModels()
 
-    private lateinit var B: FragmentForYouBinding
     private lateinit var C: GenericCarouselController
-    private lateinit var VM: BaseClusterViewModel
-
     private lateinit var streamBundle: StreamBundle
-    private lateinit var endlessRecyclerOnScrollListener: EndlessRecyclerOnScrollListener
 
     private var pageType = 0
 
@@ -60,18 +60,9 @@ class ForYouFragment : BaseFragment(), GenericCarouselController.Callbacks {
         }
     }
 
-    override fun onCreateView(
-        inflater: LayoutInflater,
-        container: ViewGroup?,
-        savedInstanceState: Bundle?
-    ): View {
-        B = FragmentForYouBinding.bind(
-            inflater.inflate(
-                R.layout.fragment_for_you,
-                container,
-                false
-            )
-        )
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        _binding = FragmentForYouBinding.bind(view)
 
         C = GenericCarouselController(this)
 
@@ -81,36 +72,39 @@ class ForYouFragment : BaseFragment(), GenericCarouselController.Callbacks {
         }
 
         when (pageType) {
-            0 -> VM =
-                ViewModelProvider(requireActivity()).get(AppsForYouViewModel::class.java)
-            1 -> VM =
-                ViewModelProvider(requireActivity()).get(GamesForYouViewModel::class.java)
+            0 -> viewModel.getStreamBundle(Category.APPLICATION, Type.HOME)
+            1 -> viewModel.getStreamBundle(Category.GAME, Type.HOME)
         }
 
-        return B.root
-    }
+        binding.recycler.setController(C)
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        B.recycler.setController(C)
-
-        VM.liveData.observe(viewLifecycleOwner) {
+        viewModel.liveData.observe(viewLifecycleOwner) {
             when (it) {
                 is ViewState.Empty -> {
                 }
+
                 is ViewState.Loading -> {
                     updateController(null)
                 }
+
                 is ViewState.Error -> {
 
                 }
+
                 is ViewState.Status -> {
 
                 }
+
                 is ViewState.Success<*> -> {
-                    if (!::streamBundle.isInitialized)
-                        attachRecycler()
+                    if (!::streamBundle.isInitialized) {
+                        binding.recycler.addOnScrollListener(
+                            object : EndlessRecyclerOnScrollListener() {
+                                override fun onLoadMore(currentPage: Int) {
+                                    viewModel.observe()
+                                }
+                            }
+                        )
+                    }
 
                     streamBundle = it.data as StreamBundle
 
@@ -120,15 +114,9 @@ class ForYouFragment : BaseFragment(), GenericCarouselController.Callbacks {
         }
     }
 
-    private fun attachRecycler() {
-        endlessRecyclerOnScrollListener =
-            object : EndlessRecyclerOnScrollListener() {
-                override fun onLoadMore(currentPage: Int) {
-                    VM.observe()
-                }
-            }
-
-        B.recycler.addOnScrollListener(endlessRecyclerOnScrollListener)
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
     }
 
     private fun updateController(streamBundle: StreamBundle?) {
@@ -141,7 +129,7 @@ class ForYouFragment : BaseFragment(), GenericCarouselController.Callbacks {
     }
 
     override fun onClusterScrolled(streamCluster: StreamCluster) {
-        VM.observeCluster(streamCluster)
+        viewModel.observeCluster(streamCluster)
     }
 
     override fun onAppClick(app: App) {

app/src/main/java/com/aurora/store/viewmodel/homestream/BaseClusterViewModel.kt

@@ -36,12 +36,12 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.supervisorScope
 
-abstract class BaseClusterViewModel(application: Application) : BaseAndroidViewModel(application) {
+class BaseClusterViewModel(application: Application) : BaseAndroidViewModel(application) {
 
     var authData: AuthData = AuthProvider.with(application).getAuthData()
 
-    var streamHelper: StreamHelper = StreamHelper(authData)
-        .using(HttpClient.getPreferredClient(application))
+    var streamHelper: StreamHelper =
+        StreamHelper(authData).using(HttpClient.getPreferredClient(application))
 
     val liveData: MutableLiveData<ViewState> = MutableLiveData()
     var streamBundle: StreamBundle = StreamBundle()
@@ -49,15 +49,11 @@ abstract class BaseClusterViewModel(application: Application) : BaseAndroidViewM
     lateinit var type: StreamHelper.Type
     lateinit var category: StreamHelper.Category
 
-    open fun getStreamBundle(
-        nextPageUrl: String,
-        category: StreamHelper.Category,
-        type: StreamHelper.Type
-    ): StreamBundle {
-        return if (streamBundle.streamClusters.isEmpty())
-            streamHelper.getNavStream(type, category)
-        else
-            streamHelper.next(nextPageUrl)
+    fun getStreamBundle(category: StreamHelper.Category, type: StreamHelper.Type) {
+        this.type = type
+        this.category = category
+        liveData.postValue(ViewState.Loading)
+        observe()
     }
 
     override fun observe() {
@@ -67,11 +63,11 @@ abstract class BaseClusterViewModel(application: Application) : BaseAndroidViewM
                     if (!streamBundle.hasCluster() || streamBundle.hasNext()) {
 
                         //Fetch new stream bundle
-                        val newBundle = getStreamBundle(
-                            streamBundle.streamNextPageUrl,
-                            category,
-                            type
-                        )
+                        val newBundle = if (streamBundle.streamClusters.isEmpty()) {
+                            streamHelper.getNavStream(type, category)
+                        } else {
+                            streamHelper.next(streamBundle.streamNextPageUrl)
+                        }
 
                         //Update old bundle
                         streamBundle.apply {

app/src/main/java/com/aurora/store/viewmodel/homestream/ForYouViewModel.kt

@@ -1,44 +0,0 @@
-/*
- * Aurora Store
- *  Copyright (C) 2021, Rahul Kumar Patel <whyorean@gmail.com>
- *
- *  Aurora Store is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  Aurora Store is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with Aurora Store.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-package com.aurora.store.viewmodel.homestream
-
-import android.app.Application
-import com.aurora.gplayapi.helpers.StreamHelper
-import com.aurora.store.data.ViewState
-
-class AppsForYouViewModel(application: Application) : BaseClusterViewModel(application) {
-
-    init {
-        category = StreamHelper.Category.APPLICATION
-        type = StreamHelper.Type.HOME
-        liveData.postValue(ViewState.Loading)
-        observe()
-    }
-}
-
-class GamesForYouViewModel(application: Application) : BaseClusterViewModel(application) {
-
-    init {
-        category = StreamHelper.Category.GAME
-        type = StreamHelper.Type.HOME
-        liveData.postValue(ViewState.Loading)
-        observe()
-    }
-}