Update how FavoriteDataSource and FavoriteRepository get initialised

app/src/main/java/awais/instagrabber/db/datasources/FavoriteDataSource.kt

@@ -6,7 +6,7 @@ import awais.instagrabber.db.dao.FavoriteDao
 import awais.instagrabber.db.entities.Favorite
 import awais.instagrabber.models.enums.FavoriteType
 
-class FavoriteDataSource private constructor(private val favoriteDao: FavoriteDao) {
+class FavoriteDataSource(private val favoriteDao: FavoriteDao) {
     suspend fun getFavorite(query: String, type: FavoriteType): Favorite? = favoriteDao.findFavoriteByQueryAndType(query, type)
 
     suspend fun getAllFavorites(): List<Favorite> = favoriteDao.getAllFavorites()
@@ -26,20 +26,14 @@ class FavoriteDataSource private constructor(private val favoriteDao: FavoriteDa
     }
 
     companion object {
-        private lateinit var INSTANCE: FavoriteDataSource
+        @Volatile
+        private var INSTANCE: FavoriteDataSource? = null
 
-        @JvmStatic
-        @Synchronized
         fun getInstance(context: Context): FavoriteDataSource {
-            if (!this::INSTANCE.isInitialized) {
-                synchronized(FavoriteDataSource::class.java) {
-                    if (!this::INSTANCE.isInitialized) {
-                        val database = AppDatabase.getDatabase(context)
-                        INSTANCE = FavoriteDataSource(database.favoriteDao())
+            return INSTANCE ?: synchronized(this) {
+                val dao: FavoriteDao = AppDatabase.getDatabase(context).favoriteDao()
+                FavoriteDataSource(dao).also { INSTANCE = it }
             }
         }
     }
-            return INSTANCE
-        }
-    }
 }

app/src/main/java/awais/instagrabber/db/repositories/FavoriteRepository.kt

@@ -1,10 +1,11 @@
 package awais.instagrabber.db.repositories
 
+import android.content.Context
 import awais.instagrabber.db.datasources.FavoriteDataSource
 import awais.instagrabber.db.entities.Favorite
 import awais.instagrabber.models.enums.FavoriteType
 
-class FavoriteRepository private constructor(private val favoriteDataSource: FavoriteDataSource) {
+class FavoriteRepository(private val favoriteDataSource: FavoriteDataSource) {
 
     suspend fun getFavorite(query: String, type: FavoriteType): Favorite? = favoriteDataSource.getFavorite(query, type)
 
@@ -15,14 +16,14 @@ class FavoriteRepository private constructor(private val favoriteDataSource: Fav
     suspend fun deleteFavorite(query: String?, type: FavoriteType?) = favoriteDataSource.deleteFavorite(query, type)
 
     companion object {
-        private lateinit var instance: FavoriteRepository
+        @Volatile
+        private var INSTANCE: FavoriteRepository? = null
 
-        @JvmStatic
-        fun getInstance(favoriteDataSource: FavoriteDataSource): FavoriteRepository {
-            if (!this::instance.isInitialized) {
-                instance = FavoriteRepository(favoriteDataSource)
+        fun getInstance(context: Context): FavoriteRepository {
+            return INSTANCE ?: synchronized(this) {
+                val dataSource: FavoriteDataSource = FavoriteDataSource.getInstance(context)
+                FavoriteRepository(dataSource).also { INSTANCE = it }
             }
-            return instance
         }
     }
 }

app/src/main/java/awais/instagrabber/fragments/HashTagFragment.java

@@ -48,7 +48,6 @@ import awais.instagrabber.asyncs.HashtagPostFetchService;
 import awais.instagrabber.customviews.PrimaryActionModeCallback;
 import awais.instagrabber.databinding.FragmentHashtagBinding;
 import awais.instagrabber.databinding.LayoutHashtagDetailsBinding;
-import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.FavoriteRepository;
 import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
@@ -478,7 +477,7 @@ public class HashTagFragment extends Fragment implements SwipeRefreshLayout.OnRe
         hashtagDetailsBinding.favChip.setVisibility(View.VISIBLE);
         final Context context = getContext();
         if (context == null) return;
-        final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
+        final FavoriteRepository favoriteRepository = FavoriteRepository.Companion.getInstance(context);
         favoriteRepository.getFavorite(
                 hashtag,
                 FavoriteType.HASHTAG,

app/src/main/java/awais/instagrabber/fragments/LocationFragment.java

@@ -46,7 +46,6 @@ import awais.instagrabber.asyncs.LocationPostFetchService;
 import awais.instagrabber.customviews.PrimaryActionModeCallback;
 import awais.instagrabber.databinding.FragmentLocationBinding;
 import awais.instagrabber.databinding.LayoutLocationDetailsBinding;
-import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.FavoriteRepository;
 import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
@@ -489,8 +488,7 @@ public class LocationFragment extends Fragment implements SwipeRefreshLayout.OnR
             locationDetailsBinding.btnMap.setOnClickListener(null);
         }
 
-        final FavoriteDataSource dataSource = FavoriteDataSource.getInstance(context);
-        final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(dataSource);
+        final FavoriteRepository favoriteRepository = FavoriteRepository.Companion.getInstance(context);
         locationDetailsBinding.favChip.setVisibility(View.VISIBLE);
         favoriteRepository.getFavorite(
                 String.valueOf(locationId),

app/src/main/java/awais/instagrabber/fragments/main/ProfileFragment.java

@@ -60,7 +60,6 @@ import awais.instagrabber.customviews.PrimaryActionModeCallback;
 import awais.instagrabber.customviews.PrimaryActionModeCallback.CallbacksHelper;
 import awais.instagrabber.databinding.FragmentProfileBinding;
 import awais.instagrabber.databinding.LayoutProfileDetailsBinding;
-import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.AccountRepository;
 import awais.instagrabber.db.repositories.FavoriteRepository;
@@ -341,7 +340,7 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
         final Context context = getContext();
         if (context == null) return;
         accountRepository = AccountRepository.Companion.getInstance(context);
-        favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
+        favoriteRepository = FavoriteRepository.Companion.getInstance(context);
         appStateViewModel = new ViewModelProvider(fragmentActivity).get(AppStateViewModel.class);
         viewModel = new ViewModelProvider(this, new ProfileFragmentViewModelFactory(
                 UserRepository.Companion.getInstance(),
@@ -709,7 +708,7 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
         profileDetailsBinding.isPrivate.setVisibility(profileModel.isPrivate() ? View.VISIBLE : View.GONE);
 
         setupButtons(profileId);
-        final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(getContext()));
+        final FavoriteRepository favoriteRepository = FavoriteRepository.Companion.getInstance(getContext());
         favoriteRepository.getFavorite(
                 profileModel.getUsername(),
                 FavoriteType.USER,

app/src/main/java/awais/instagrabber/utils/ExportImportUtils.java

@@ -32,7 +32,6 @@ import java.util.List;
 import java.util.Map;
 
 import awais.instagrabber.BuildConfig;
-import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.entities.Account;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.AccountRepository;
@@ -158,7 +157,7 @@ public final class ExportImportUtils {
                     LocalDateTime.ofInstant(Instant.ofEpochMilli(epochMillis), ZoneId.systemDefault())
             );
             // Log.d(TAG, "importJson: favoriteModel: " + favoriteModel);
-            final FavoriteRepository favRepo = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
+            final FavoriteRepository favRepo = FavoriteRepository.Companion.getInstance(context);
             favRepo.getFavorite(
                     query,
                     favoriteType,
@@ -365,7 +364,7 @@ public final class ExportImportUtils {
 
     private static ListenableFuture<JSONArray> getFavorites(final Context context) {
         final SettableFuture<JSONArray> future = SettableFuture.create();
-        final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
+        final FavoriteRepository favoriteRepository = FavoriteRepository.Companion.getInstance(context);
         favoriteRepository.getAllFavorites(
                 CoroutineUtilsKt.getContinuation((favorites, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
                     if (throwable != null) {

app/src/main/java/awais/instagrabber/viewmodels/FavoritesViewModel.kt

@@ -6,7 +6,6 @@ import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
-import awais.instagrabber.db.datasources.FavoriteDataSource
 import awais.instagrabber.db.entities.Favorite
 import awais.instagrabber.db.repositories.FavoriteRepository
 import awais.instagrabber.utils.extensions.TAG
@@ -18,7 +17,7 @@ class FavoritesViewModel(application: Application) : AndroidViewModel(applicatio
     private val _list = MutableLiveData<List<Favorite>>()
     val list: LiveData<List<Favorite>> = _list
 
-    private val favoriteRepository: FavoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(application))
+    private val favoriteRepository: FavoriteRepository = FavoriteRepository.getInstance(application)
 
     init {
         fetch()

app/src/main/java/awais/instagrabber/viewmodels/SearchFragmentViewModel.java

@@ -19,7 +19,6 @@ import java.util.List;
 import java.util.Objects;
 import java.util.stream.Collectors;
 
-import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.datasources.RecentSearchDataSource;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.entities.RecentSearch;
@@ -83,7 +82,7 @@ public class SearchFragmentViewModel extends AppStateViewModel {
         distinctQuery = distinctUntilChanged(query);
         searchService = SearchService.getInstance();
         recentSearchRepository = RecentSearchRepository.getInstance(RecentSearchDataSource.getInstance(application));
-        favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(application));
+        favoriteRepository = FavoriteRepository.Companion.getInstance(application);
     }
 
     public LiveData<String> getQuery() {