Fragment Code Clean , and Unification

app/src/main/java/com/shabinder/spotiflyer/MainActivity.kt

@@ -69,12 +69,12 @@ class MainActivity : AppCompatActivity(){
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
         binding = DataBindingUtil.setContentView(this, R.layout.main_activity)
         sharedViewModel = ViewModelProvider(this).get(SharedViewModel::class.java)
         navController = findNavController(R.id.navHostFragment)
         snackBarAnchor = binding.snackBarPosition
         //Enabling Dark Mode
-        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
 
         authenticateSpotify()
 
@@ -145,10 +145,10 @@ class MainActivity : AppCompatActivity(){
         }).addInterceptor(NetworkInterceptor())
 
         val retrofit = Retrofit.Builder()
-                .baseUrl("https://api.spotify.com/v1/")
+            .baseUrl("https://api.spotify.com/v1/")
-                .client(httpClient.build())
+            .client(httpClient.build())
-                .addConverterFactory(MoshiConverterFactory.create(moshi))
+            .addConverterFactory(MoshiConverterFactory.create(moshi))
-                .build()
+            .build()
 
         spotifyService = retrofit.create(SpotifyService::class.java)
         sharedViewModel.spotifyService.value = spotifyService

app/src/main/java/com/shabinder/spotiflyer/downloadHelper/DownloadHelper.kt

@@ -76,7 +76,7 @@ object DownloadHelper {
                             //Delay is Added ,if a request is in processing it may finish
                             Log.i("Spotify Helper","Download Request Sent")
                             sharedViewModel?.uiScope?.launch (Dispatchers.Main){
-                                Toast.makeText(mainActivity,"Download Started, Now You can leave the App!", Toast.LENGTH_SHORT).show()
+                                showMessage("Download Started, Now You can leave the App!")
                             }
                             startService(mainActivity,downloadList)
                         },5000)

app/src/main/java/com/shabinder/spotiflyer/ui/gaana/GaanaFragment.kt

@@ -17,55 +17,38 @@
 
 package com.shabinder.spotiflyer.ui.gaana
 
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
 import android.os.Bundle
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.databinding.DataBindingUtil
-import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.SimpleItemAnimator
-import com.shabinder.spotiflyer.R
 import com.shabinder.spotiflyer.SharedViewModel
-import com.shabinder.spotiflyer.databinding.TrackListFragmentBinding
 import com.shabinder.spotiflyer.downloadHelper.DownloadHelper
 import com.shabinder.spotiflyer.models.DownloadStatus
-import com.shabinder.spotiflyer.models.TrackDetails
 import com.shabinder.spotiflyer.models.spotify.Source
-import com.shabinder.spotiflyer.networking.GaanaInterface
-import com.shabinder.spotiflyer.networking.YoutubeMusicApi
 import com.shabinder.spotiflyer.recyclerView.TrackListAdapter
 import com.shabinder.spotiflyer.utils.*
-import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import javax.inject.Inject
 
-@AndroidEntryPoint
+class GaanaFragment : BaseFragment() {
-class GaanaFragment : Fragment() {
+
+    override lateinit var baseViewModel: BaseViewModel
+    override lateinit var adapter: TrackListAdapter
+    override var source: Source = Source.Gaana
+    private val viewModel:GaanaViewModel
+        get() = baseViewModel as GaanaViewModel
 
-    private lateinit var binding: TrackListFragmentBinding
-    private lateinit var sharedViewModel: SharedViewModel
-    @Inject lateinit var youtubeMusicApi: YoutubeMusicApi
-    private lateinit var viewModel: GaanaViewModel
-    private lateinit var adapter: TrackListAdapter
-    @Inject lateinit var gaanaInterface: GaanaInterface
-    private var intentFilter: IntentFilter? = null
-    private var updateUIReceiver: BroadcastReceiver? = null
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        binding =  DataBindingUtil.inflate(inflater,R.layout.track_list_fragment, container, false)
+        super.onCreateView(inflater, container, savedInstanceState)
+
         initializeAll()
-        initializeLiveDataObservers()
-        initializeBroadcast()
 
         val gaanaLink = GaanaFragmentArgs.fromBundle(requireArguments()).link.substringAfter("gaana.com/")
         //Link Schema: https://gaana.com/type/link
@@ -92,16 +75,16 @@ class GaanaFragment : Fragment() {
                     binding.downloadingFab.visibility = View.VISIBLE
 
                     rotateAnim(binding.downloadingFab)
-                    for (track in viewModel.trackList.value!!){
+                    for (track in baseViewModel.trackList.value!!){
                         if(track.downloaded != DownloadStatus.Downloaded){
                             track.downloaded = DownloadStatus.Downloading
-                            adapter.notifyItemChanged(viewModel.trackList.value!!.indexOf(track))
+                            adapter.notifyItemChanged(baseViewModel.trackList.value!!.indexOf(track))
                         }
                     }
                     showMessage("Processing!")
                     sharedViewModel.uiScope.launch(Dispatchers.Default){
                         val urlList = arrayListOf<String>()
-                        viewModel.trackList.value?.forEach { urlList.add(it.albumArtURL) }
+                        baseViewModel.trackList.value?.forEach { urlList.add(it.albumArtURL) }
                         //Appending Source
                         urlList.add("gaana")
                         loadAllImages(
@@ -109,19 +92,18 @@ class GaanaFragment : Fragment() {
                             urlList
                         )
                     }
-                    viewModel.uiScope.launch {
+                    baseViewModel.uiScope.launch {
-                        val finalList = viewModel.trackList.value
+                        val finalList = baseViewModel.trackList.value
                         if(finalList.isNullOrEmpty())showMessage("Not Downloading Any Song")
                         DownloadHelper.downloadAllTracks(
-                            viewModel.folderType,
+                            baseViewModel.folderType,
-                            viewModel.subFolder,
+                            baseViewModel.subFolder,
                             finalList ?: listOf(),
                         )
                     }
                 }
             }
         }
-
         return binding.root
     }
 
@@ -130,7 +112,7 @@ class GaanaFragment : Fragment() {
      **/
     private fun initializeAll() {
         sharedViewModel = ViewModelProvider(this.requireActivity()).get(SharedViewModel::class.java)
-        viewModel = ViewModelProvider(this).get(GaanaViewModel::class.java)
+        baseViewModel = ViewModelProvider(this).get(GaanaViewModel::class.java)
         viewModel.gaanaInterface = gaanaInterface
         adapter = TrackListAdapter(viewModel)
         DownloadHelper.youtubeMusicApi = youtubeMusicApi
@@ -140,73 +122,5 @@ class GaanaFragment : Fragment() {
         (binding.trackList.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
     }
 
-    /**
-     *Live Data Observers
-     **/
-    private fun initializeLiveDataObservers() {
-        viewModel.trackList.observe(viewLifecycleOwner, {
-            if (it.isNotEmpty()){
-                Log.i("GaanaFragment","TrackList Updated")
-                adapter.submitList(it,Source.Gaana)
-                checkIfAllDownloaded()
-            }
-        })
 
-        viewModel.coverUrl.observe(viewLifecycleOwner, {
-            if(it!="Loading") bindImage(binding.coverImage,it, Source.Gaana)
-        })
-
-        viewModel.title.observe(viewLifecycleOwner, {
-            binding.titleView.text = it
-        })
-    }
-
-    private fun checkIfAllDownloaded() {
-        if(!viewModel.trackList.value!!.any { it.downloaded != DownloadStatus.Downloaded }){
-            //All Tracks Downloaded
-            binding.btnDownloadAll.visibility = View.GONE
-            binding.downloadingFab.apply{
-                setImageResource(R.drawable.ic_tick)
-                visibility = View.VISIBLE
-                clearAnimation()
-            }
-        }
-    }
-    private fun initializeBroadcast() {
-        intentFilter = IntentFilter()
-        intentFilter?.addAction("track_download_completed")
-
-        updateUIReceiver = object : BroadcastReceiver() {
-            override fun onReceive(context: Context?, intent: Intent?) {
-                //UI update here
-                if (intent != null){
-                    val trackDetails = intent.getParcelableExtra<TrackDetails?>("track")
-                    trackDetails?.let {
-                        val position: Int = viewModel.trackList.value?.map { it.title }?.indexOf(trackDetails.title) ?: -1
-                        Log.i("Track","Download Completed Intent :$position")
-                        if(position != -1) {
-                            val track = viewModel.trackList.value?.get(position)
-                            track?.let{
-                                it.downloaded = DownloadStatus.Downloaded
-                                viewModel.trackList.value?.set(position, it)
-                                adapter.notifyItemChanged(position)
-                                checkIfAllDownloaded()
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        requireActivity().registerReceiver(updateUIReceiver, intentFilter)
-    }
-
-    override fun onResume() {
-        super.onResume()
-        initializeBroadcast()
-    }
-
-    override fun onPause() {
-        super.onPause()
-        requireActivity().unregisterReceiver(updateUIReceiver)
-    }
 }

app/src/main/java/com/shabinder/spotiflyer/ui/spotify/SpotifyFragment.kt

@@ -18,47 +18,31 @@
 package com.shabinder.spotiflyer.ui.spotify
 
 import android.annotation.SuppressLint
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
 import android.os.Bundle
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.databinding.DataBindingUtil
-import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.SimpleItemAnimator
 import com.shabinder.spotiflyer.MainActivity
-import com.shabinder.spotiflyer.R
-import com.shabinder.spotiflyer.SharedViewModel
-import com.shabinder.spotiflyer.databinding.TrackListFragmentBinding
 import com.shabinder.spotiflyer.downloadHelper.DownloadHelper
 import com.shabinder.spotiflyer.models.DownloadStatus
-import com.shabinder.spotiflyer.models.TrackDetails
 import com.shabinder.spotiflyer.models.spotify.Source
-import com.shabinder.spotiflyer.networking.YoutubeMusicApi
 import com.shabinder.spotiflyer.recyclerView.TrackListAdapter
 import com.shabinder.spotiflyer.utils.*
 import com.shabinder.spotiflyer.utils.Provider.mainActivity
-import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import javax.inject.Inject
 
 @Suppress("DEPRECATION")
+class SpotifyFragment : BaseFragment() {
 
-@AndroidEntryPoint
+    override lateinit var baseViewModel: BaseViewModel
-class SpotifyFragment : Fragment() {
+    override lateinit var adapter: TrackListAdapter
-    private lateinit var binding:TrackListFragmentBinding
+    override var source: Source = Source.Spotify
-    private lateinit var sharedViewModel: SharedViewModel
+    private val viewModel: SpotifyViewModel
-    @Inject lateinit var youtubeMusicApi: YoutubeMusicApi
+        get() = baseViewModel as SpotifyViewModel
-    private lateinit var viewModel: SpotifyViewModel
-    private lateinit var adapter:TrackListAdapter
-    private var intentFilter:IntentFilter? = null
-    private var updateUIReceiver: BroadcastReceiver? = null
 
 
     @SuppressLint("SetJavaScriptEnabled")
@@ -66,13 +50,11 @@ class SpotifyFragment : Fragment() {
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-        binding = DataBindingUtil.inflate(inflater,R.layout.track_list_fragment,container,false)
+        super.onCreateView(inflater, container, savedInstanceState)
         initializeAll()
-        initializeLiveDataObservers()
-        initializeBroadcast()
 
         val spotifyLink = SpotifyFragmentArgs.fromBundle(requireArguments()).link.substringAfter("open.spotify.com/")
-        
+
         val link = spotifyLink.substringAfterLast('/', "Error").substringBefore('?')
         val type = spotifyLink.substringBeforeLast('/', "Error").substringAfterLast('/')
 
@@ -142,87 +124,15 @@ class SpotifyFragment : Fragment() {
      * Basic Initialization
      **/
     private fun initializeAll() {
-        sharedViewModel = ViewModelProvider(this.requireActivity()).get(SharedViewModel::class.java)
+        baseViewModel = ViewModelProvider(this).get(SpotifyViewModel::class.java)
-        viewModel = ViewModelProvider(this).get(SpotifyViewModel::class.java)
+        adapter = TrackListAdapter(viewModel)
         sharedViewModel.spotifyService.observe(viewLifecycleOwner, {
             viewModel.spotifyService = it
         })
-        adapter = TrackListAdapter(viewModel)
         DownloadHelper.youtubeMusicApi = youtubeMusicApi
         DownloadHelper.sharedViewModel = sharedViewModel
         DownloadHelper.statusBar = binding.statusBar
         binding.trackList.adapter = adapter
         (binding.trackList.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
     }
-
-
-    /**
-     *Live Data Observers
-     **/
-    private fun initializeLiveDataObservers() {
-        viewModel.trackList.observe(viewLifecycleOwner, {
-            if (it.isNotEmpty()){
-                Log.i("SpotifyFragment","TrackList Updated")
-                adapter.submitList(it,Source.Spotify)
-                checkIfAllDownloaded()
-            }
-        })
-
-        viewModel.coverUrl.observe(viewLifecycleOwner, {
-            if(it!="Loading") bindImage(binding.coverImage,it, Source.Spotify)
-        })
-
-        viewModel.title.observe(viewLifecycleOwner, {
-            binding.titleView.text = it
-        })
-    }
-
-    private fun checkIfAllDownloaded() {
-        if(!viewModel.trackList.value!!.any { it.downloaded != DownloadStatus.Downloaded }){
-            //All Tracks Downloaded
-            binding.btnDownloadAll.visibility = View.GONE
-            binding.downloadingFab.apply{
-                setImageResource(R.drawable.ic_tick)
-                visibility = View.VISIBLE
-                clearAnimation()
-            }
-        }
-    }
-    private fun initializeBroadcast() {
-        intentFilter = IntentFilter()
-        intentFilter?.addAction("track_download_completed")
-
-        updateUIReceiver = object : BroadcastReceiver() {
-            override fun onReceive(context: Context?, intent: Intent?) {
-                //UI update here
-                if (intent != null){
-                    val trackDetails = intent.getParcelableExtra<TrackDetails?>("track")
-                    trackDetails?.let {
-                        val position: Int = viewModel.trackList.value?.map { it.title }?.indexOf(trackDetails.title) ?: -1
-                        Log.i("Track","Download Completed Intent :$position")
-                        if(position != -1) {
-                            val track = viewModel.trackList.value?.get(position)
-                            track?.let{
-                                it.downloaded = DownloadStatus.Downloaded
-                                viewModel.trackList.value?.set(position, it)
-                                adapter.notifyItemChanged(position)
-                                checkIfAllDownloaded()
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        requireActivity().registerReceiver(updateUIReceiver, intentFilter)
-    }
-
-    override fun onResume() {
-        super.onResume()
-        initializeBroadcast()
-    }
-
-    override fun onPause() {
-        super.onPause()
-        requireActivity().unregisterReceiver(updateUIReceiver)
-    }
 }

app/src/main/java/com/shabinder/spotiflyer/ui/youtube/YoutubeFragment.kt

@@ -17,43 +17,26 @@
 
 package com.shabinder.spotiflyer.ui.youtube
 
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
 import android.os.Bundle
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.databinding.DataBindingUtil
-import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
-import com.github.kiulian.downloader.YoutubeDownloader
-import com.shabinder.spotiflyer.R
-import com.shabinder.spotiflyer.SharedViewModel
-import com.shabinder.spotiflyer.databinding.TrackListFragmentBinding
 import com.shabinder.spotiflyer.downloadHelper.YTDownloadHelper
 import com.shabinder.spotiflyer.models.DownloadStatus
-import com.shabinder.spotiflyer.models.TrackDetails
 import com.shabinder.spotiflyer.models.spotify.Source
 import com.shabinder.spotiflyer.recyclerView.TrackListAdapter
 import com.shabinder.spotiflyer.utils.*
-import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import javax.inject.Inject
 
-@AndroidEntryPoint
+class YoutubeFragment : BaseFragment() {
-class YoutubeFragment : Fragment() {
 
-    private lateinit var binding: TrackListFragmentBinding
+    override lateinit var baseViewModel: BaseViewModel
-    private lateinit var viewModel: YoutubeViewModel
+    override lateinit var adapter : TrackListAdapter
-    private lateinit var sharedViewModel: SharedViewModel
+    override var source: Source = Source.YouTube
-    @Inject lateinit var ytDownloader: YoutubeDownloader
+    private val viewModel: YoutubeViewModel
-    private lateinit var adapter : TrackListAdapter
+        get() = baseViewModel as YoutubeViewModel
-    private var intentFilter: IntentFilter? = null
-    private var updateUIReceiver: BroadcastReceiver? = null
     private val sampleDomain2 = "youtu.be"
     private val sampleDomain1 = "youtube.com"
 
@@ -61,15 +44,11 @@ class YoutubeFragment : Fragment() {
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        binding = DataBindingUtil.inflate(inflater,R.layout.track_list_fragment,container,false)
+        super.onCreateView(inflater, container, savedInstanceState)
-        viewModel = ViewModelProvider(this).get(YoutubeViewModel::class.java)
+        baseViewModel = ViewModelProvider(this).get(YoutubeViewModel::class.java)
-        sharedViewModel = ViewModelProvider(this.requireActivity()).get(SharedViewModel::class.java)
         adapter = TrackListAdapter(viewModel)
         binding.trackList.adapter = adapter
 
-        initializeLiveDataObservers()
-        initializeBroadcast()
-
         val args = YoutubeFragmentArgs.fromBundle(requireArguments())
         val link = args.link
         youtubeSearch(link)
@@ -135,76 +114,4 @@ class YoutubeFragment : Fragment() {
             }
         }
     }
-    override fun onResume() {
-        super.onResume()
-        initializeBroadcast()
-    }
-
-    private fun initializeBroadcast() {
-        intentFilter = IntentFilter()
-        intentFilter?.addAction("track_download_completed")
-
-        updateUIReceiver = object : BroadcastReceiver() {
-            override fun onReceive(context: Context?, intent: Intent?) {
-                //UI update here
-                if (intent != null){
-                    val trackDetails = intent.getParcelableExtra<TrackDetails?>("track")
-                    trackDetails?.let {
-                        val position: Int = viewModel.trackList.value?.map { it.title }?.indexOf(trackDetails.title) ?: -1
-                        Log.i("Track","Download Completed Intent :$position")
-                        if(position != -1) {
-                            val track = viewModel.trackList.value?.get(position)
-                            track?.let{
-                                it.downloaded = DownloadStatus.Downloaded
-                                viewModel.trackList.value?.set(position, it)
-                                adapter.notifyItemChanged(position)
-                                checkIfAllDownloaded()
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        requireActivity().registerReceiver(updateUIReceiver, intentFilter)
-    }
-
-    override fun onPause() {
-        super.onPause()
-        requireActivity().unregisterReceiver(updateUIReceiver)
-    }
-
-    private fun checkIfAllDownloaded() {
-        if(!viewModel.trackList.value!!.any { it.downloaded != DownloadStatus.Downloaded }){
-            //All Tracks Downloaded
-            binding.btnDownloadAll.visibility = View.GONE
-            binding.downloadingFab.apply{
-                setImageResource(R.drawable.ic_tick)
-                visibility = View.VISIBLE
-                clearAnimation()
-            }
-        }
-    }
-    private fun initializeLiveDataObservers() {
-        /**
-         * CoverUrl Binding Observer!
-         **/
-        viewModel.coverUrl.observe(viewLifecycleOwner, {
-            if(it!="Loading") bindImage(binding.coverImage,it, Source.YouTube)
-        })
-
-        /**
-         * TrackList Binding Observer!
-         **/
-        viewModel.trackList.observe(viewLifecycleOwner, {
-            adapter.submitList(it,Source.YouTube)
-        })
-
-        /**
-         * Title Binding Observer!
-         **/
-        viewModel.title.observe(viewLifecycleOwner, {
-            binding.titleView.text = it
-        })
-
-    }
 }

app/src/main/java/com/shabinder/spotiflyer/utils/BaseFragment.kt

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C)  2020  Shabinder Singh
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.shabinder.spotiflyer.utils
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.github.kiulian.downloader.YoutubeDownloader
+import com.shabinder.spotiflyer.R
+import com.shabinder.spotiflyer.SharedViewModel
+import com.shabinder.spotiflyer.databinding.TrackListFragmentBinding
+import com.shabinder.spotiflyer.models.DownloadStatus
+import com.shabinder.spotiflyer.models.TrackDetails
+import com.shabinder.spotiflyer.models.spotify.Source
+import com.shabinder.spotiflyer.networking.GaanaInterface
+import com.shabinder.spotiflyer.networking.YoutubeMusicApi
+import com.shabinder.spotiflyer.recyclerView.TrackListAdapter
+import dagger.hilt.android.AndroidEntryPoint
+import javax.inject.Inject
+
+@AndroidEntryPoint
+abstract class BaseFragment : Fragment() {
+
+    @Inject open lateinit var youtubeMusicApi: YoutubeMusicApi
+    @Inject open lateinit var ytDownloader: YoutubeDownloader
+    @Inject open lateinit var gaanaInterface: GaanaInterface
+    open lateinit var sharedViewModel: SharedViewModel
+    open lateinit var binding: TrackListFragmentBinding
+    abstract var baseViewModel: BaseViewModel
+    abstract var adapter: TrackListAdapter
+    abstract var source: Source
+    private var intentFilter: IntentFilter? = null
+    private var updateUIReceiver: BroadcastReceiver? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        sharedViewModel = ViewModelProvider(this.requireActivity()).get(SharedViewModel::class.java)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        binding =  DataBindingUtil.inflate(inflater,R.layout.track_list_fragment, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        initializeLiveDataObservers()
+    }
+    /**
+     *Live Data Observers
+     **/
+    open fun initializeLiveDataObservers() {
+        baseViewModel.trackList.observe(viewLifecycleOwner, {
+            if (it.isNotEmpty()){
+                Log.i("GaanaFragment","TrackList Updated")
+                adapter.submitList(it, source)
+                checkIfAllDownloaded()
+            }
+        })
+
+        baseViewModel.coverUrl.observe(viewLifecycleOwner, {
+            if(it!="Loading") bindImage(binding.coverImage,it, source)
+        })
+
+        baseViewModel.title.observe(viewLifecycleOwner, {
+            binding.titleView.text = it
+        })
+    }
+
+    open fun initializeBroadcast() {
+        intentFilter = IntentFilter()
+        intentFilter?.addAction("track_download_completed")
+
+        updateUIReceiver = object : BroadcastReceiver() {
+            override fun onReceive(context: Context?, intent: Intent?) {
+                //UI update here
+                if (intent != null){
+                    val trackDetails = intent.getParcelableExtra<TrackDetails?>("track")
+                    trackDetails?.let {
+                        val position: Int = baseViewModel.trackList.value?.map { it.title }?.indexOf(trackDetails.title) ?: -1
+                        Log.i("Track","Download Completed Intent :$position")
+                        if(position != -1) {
+                            val track = baseViewModel.trackList.value?.get(position)
+                            track?.let{
+                                it.downloaded = DownloadStatus.Downloaded
+                                baseViewModel.trackList.value?.set(position, it)
+                                adapter.notifyItemChanged(position)
+                                checkIfAllDownloaded()
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        requireActivity().registerReceiver(updateUIReceiver, intentFilter)
+    }
+
+    override fun onResume() {
+        super.onResume()
+        initializeBroadcast()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        requireActivity().unregisterReceiver(updateUIReceiver)
+    }
+
+    open fun checkIfAllDownloaded() {
+        if(!baseViewModel.trackList.value!!.any { it.downloaded != DownloadStatus.Downloaded }){
+            //All Tracks Downloaded
+            binding.btnDownloadAll.visibility = View.GONE
+            binding.downloadingFab.apply{
+                setImageResource(R.drawable.ic_tick)
+                visibility = View.VISIBLE
+                clearAnimation()
+            }
+        }
+    }
+
+}

app/src/main/java/com/shabinder/spotiflyer/utils/BaseViewModel.kt

@@ -29,6 +29,7 @@ abstract class BaseViewModel:ViewModel() {
     abstract var folderType:String
     abstract var subFolder:String
     open val trackList = MutableLiveData<MutableList<TrackDetails>>()
+
     private val viewModelJob:CompletableJob = Job()
     open val uiScope = CoroutineScope(Dispatchers.Main + viewModelJob)
 

app/src/main/java/com/shabinder/spotiflyer/utils/Utils.kt

@@ -280,4 +280,20 @@ fun createDirectories() {
 }
 fun getEmojiByUnicode(unicode: Int): String? {
     return String(Character.toChars(unicode))
-}
+}
+
+/*
+internal val nullOnEmptyConverterFactory = object : Converter.Factory() {
+    fun converterFactory() = this
+    override fun responseBodyConverter(
+        type: Type,
+        annotations: Array<out Annotation>,
+        retrofit: Retrofit
+    ) = object : Converter<ResponseBody, Any?> {
+        val nextResponseBodyConverter =
+            retrofit.nextResponseBodyConverter<Any?>(converterFactory(), type, annotations)
+
+        override fun convert(value: ResponseBody) =
+            if (value.contentLength() != 0L) nextResponseBodyConverter.convert(value) else null
+    }
+}*/

build.gradle

@@ -20,7 +20,7 @@ buildscript {
     ext{
         kotlin_version = "1.4.10"
         navigationVersion = '2.3.0'
-        ext.hilt_version = '2.28-alpha'
+        ext.hilt_version = '2.29.1-alpha'
     }
     repositories {
         google()