Convert FavoriteDao, FavoriteDataSource and FavoriteRepository to kotlin

app/src/main/java/awais/instagrabber/db/dao/AccountDao.kt

@@ -12,7 +12,7 @@ interface AccountDao {
     suspend fun findAccountByUid(uid: String): Account?
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
-    suspend fun insertAccounts(vararg accounts: Account): List<Long>
+    suspend fun insertAccounts(vararg accounts: Account)
 
     @Update
     suspend fun updateAccounts(vararg accounts: Account)

app/src/main/java/awais/instagrabber/db/dao/FavoriteDao.java

@@ -1,35 +0,0 @@
-package awais.instagrabber.db.dao;
-
-import androidx.room.Dao;
-import androidx.room.Delete;
-import androidx.room.Insert;
-import androidx.room.OnConflictStrategy;
-import androidx.room.Query;
-import androidx.room.Update;
-
-import java.util.List;
-
-import awais.instagrabber.db.entities.Favorite;
-import awais.instagrabber.models.enums.FavoriteType;
-
-@Dao
-public interface FavoriteDao {
-
-    @Query("SELECT * FROM favorites")
-    List<Favorite> getAllFavorites();
-
-    @Query("SELECT * FROM favorites WHERE query_text = :query and type = :type")
-    Favorite findFavoriteByQueryAndType(String query, FavoriteType type);
-
-    @Insert
-    List<Long> insertFavorites(Favorite... favorites);
-
-    @Update
-    void updateFavorites(Favorite... favorites);
-
-    @Delete
-    void deleteFavorites(Favorite... favorites);
-
-    @Query("DELETE from favorites")
-    void deleteAllFavorites();
-}

app/src/main/java/awais/instagrabber/db/dao/FavoriteDao.kt

@@ -0,0 +1,26 @@
+package awais.instagrabber.db.dao
+
+import androidx.room.*
+import awais.instagrabber.db.entities.Favorite
+import awais.instagrabber.models.enums.FavoriteType
+
+@Dao
+interface FavoriteDao {
+    @Query("SELECT * FROM favorites")
+    suspend fun getAllFavorites(): List<Favorite>
+
+    @Query("SELECT * FROM favorites WHERE query_text = :query and type = :type")
+    suspend fun findFavoriteByQueryAndType(query: String, type: FavoriteType): Favorite?
+
+    @Insert
+    suspend fun insertFavorites(vararg favorites: Favorite)
+
+    @Update
+    suspend fun updateFavorites(vararg favorites: Favorite)
+
+    @Delete
+    suspend fun deleteFavorites(vararg favorites: Favorite)
+
+    @Query("DELETE from favorites")
+    suspend fun deleteAllFavorites()
+}

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

@@ -1,62 +0,0 @@
-package awais.instagrabber.db.datasources;
-
-import android.content.Context;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import java.util.List;
-
-import awais.instagrabber.db.AppDatabase;
-import awais.instagrabber.db.dao.FavoriteDao;
-import awais.instagrabber.db.entities.Favorite;
-import awais.instagrabber.models.enums.FavoriteType;
-
-public class FavoriteDataSource {
-    private static final String TAG = FavoriteDataSource.class.getSimpleName();
-
-    private static FavoriteDataSource INSTANCE;
-
-    private final FavoriteDao favoriteDao;
-
-    private FavoriteDataSource(final FavoriteDao favoriteDao) {
-        this.favoriteDao = favoriteDao;
-    }
-
-    public static synchronized FavoriteDataSource getInstance(@NonNull Context context) {
-        if (INSTANCE == null) {
-            synchronized (FavoriteDataSource.class) {
-                if (INSTANCE == null) {
-                    final AppDatabase database = AppDatabase.getDatabase(context);
-                    INSTANCE = new FavoriteDataSource(database.favoriteDao());
-                }
-            }
-        }
-        return INSTANCE;
-    }
-
-
-    @Nullable
-    public final Favorite getFavorite(@NonNull final String query, @NonNull final FavoriteType type) {
-        return favoriteDao.findFavoriteByQueryAndType(query, type);
-    }
-
-    @NonNull
-    public final List<Favorite> getAllFavorites() {
-        return favoriteDao.getAllFavorites();
-    }
-
-    public final void insertOrUpdateFavorite(@NonNull final Favorite favorite) {
-        if (favorite.getId() != 0) {
-            favoriteDao.updateFavorites(favorite);
-            return;
-        }
-        favoriteDao.insertFavorites(favorite);
-    }
-
-    public final void deleteFavorite(@NonNull final String query, @NonNull final FavoriteType type) {
-        final Favorite favorite = getFavorite(query, type);
-        if (favorite == null) return;
-        favoriteDao.deleteFavorites(favorite);
-    }
-}

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

@@ -0,0 +1,44 @@
+package awais.instagrabber.db.datasources
+
+import android.content.Context
+import awais.instagrabber.db.AppDatabase
+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) {
+    suspend fun getFavorite(query: String, type: FavoriteType): Favorite? = favoriteDao.findFavoriteByQueryAndType(query, type)
+
+    suspend fun getAllFavorites(): List<Favorite> = favoriteDao.getAllFavorites()
+
+    suspend fun insertOrUpdateFavorite(favorite: Favorite) {
+        if (favorite.id != 0) {
+            favoriteDao.updateFavorites(favorite)
+            return
+        }
+        favoriteDao.insertFavorites(favorite)
+    }
+
+    suspend fun deleteFavorite(query: String, type: FavoriteType) {
+        val favorite = getFavorite(query, type) ?: return
+        favoriteDao.deleteFavorites(favorite)
+    }
+
+    companion object {
+        private lateinit var INSTANCE: FavoriteDataSource
+
+        @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
+        }
+    }
+}

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

@@ -1,88 +0,0 @@
-package awais.instagrabber.db.repositories;
-
-import java.util.List;
-
-import awais.instagrabber.db.datasources.FavoriteDataSource;
-import awais.instagrabber.db.entities.Favorite;
-import awais.instagrabber.models.enums.FavoriteType;
-import awais.instagrabber.utils.AppExecutors;
-
-public class FavoriteRepository {
-    private static final String TAG = FavoriteRepository.class.getSimpleName();
-
-    private static FavoriteRepository instance;
-
-    private final AppExecutors appExecutors;
-    private final FavoriteDataSource favoriteDataSource;
-
-    private FavoriteRepository(final AppExecutors appExecutors, final FavoriteDataSource favoriteDataSource) {
-        this.appExecutors = appExecutors;
-        this.favoriteDataSource = favoriteDataSource;
-    }
-
-    public static FavoriteRepository getInstance(final FavoriteDataSource favoriteDataSource) {
-        if (instance == null) {
-            instance = new FavoriteRepository(AppExecutors.INSTANCE, favoriteDataSource);
-        }
-        return instance;
-    }
-
-    public void getFavorite(final String query, final FavoriteType type, final RepositoryCallback<Favorite> callback) {
-        // request on the I/O thread
-        appExecutors.getDiskIO().execute(() -> {
-            final Favorite favorite = favoriteDataSource.getFavorite(query, type);
-            // notify on the main thread
-            appExecutors.getMainThread().execute(() -> {
-                if (callback == null) return;
-                if (favorite == null) {
-                    callback.onDataNotAvailable();
-                    return;
-                }
-                callback.onSuccess(favorite);
-            });
-        });
-    }
-
-    public void getAllFavorites(final RepositoryCallback<List<Favorite>> callback) {
-        // request on the I/O thread
-        appExecutors.getDiskIO().execute(() -> {
-            final List<Favorite> favorites = favoriteDataSource.getAllFavorites();
-            // notify on the main thread
-            appExecutors.getMainThread().execute(() -> {
-                if (callback == null) return;
-                if (favorites == null) {
-                    callback.onDataNotAvailable();
-                    return;
-                }
-                callback.onSuccess(favorites);
-            });
-        });
-    }
-
-    public void insertOrUpdateFavorite(final Favorite favorite,
-                                       final RepositoryCallback<Void> callback) {
-        // request on the I/O thread
-        appExecutors.getDiskIO().execute(() -> {
-            favoriteDataSource.insertOrUpdateFavorite(favorite);
-            // notify on the main thread
-            appExecutors.getMainThread().execute(() -> {
-                if (callback == null) return;
-                callback.onSuccess(null);
-            });
-        });
-    }
-
-    public void deleteFavorite(final String query,
-                               final FavoriteType type,
-                               final RepositoryCallback<Void> callback) {
-        // request on the I/O thread
-        appExecutors.getDiskIO().execute(() -> {
-            favoriteDataSource.deleteFavorite(query, type);
-            // notify on the main thread
-            appExecutors.getMainThread().execute(() -> {
-                if (callback == null) return;
-                callback.onSuccess(null);
-            });
-        });
-    }
-}

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

@@ -0,0 +1,28 @@
+package awais.instagrabber.db.repositories
+
+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) {
+
+    suspend fun getFavorite(query: String, type: FavoriteType): Favorite? = favoriteDataSource.getFavorite(query, type)
+
+    suspend fun getAllFavorites(): List<Favorite> = favoriteDataSource.getAllFavorites()
+
+    suspend fun insertOrUpdateFavorite(favorite: Favorite) = favoriteDataSource.insertOrUpdateFavorite(favorite)
+
+    suspend fun deleteFavorite(query: String, type: FavoriteType) = favoriteDataSource.deleteFavorite(query, type)
+
+    companion object {
+        private lateinit var instance: FavoriteRepository
+
+        @JvmStatic
+        fun getInstance(favoriteDataSource: FavoriteDataSource): FavoriteRepository {
+            if (!this::instance.isInitialized) {
+                instance = FavoriteRepository(favoriteDataSource)
+            }
+            return instance
+        }
+    }
+}

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

@@ -51,7 +51,6 @@ 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.db.repositories.RepositoryCallback;
 import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
 import awais.instagrabber.models.PostsLayoutPreferences;
 import awais.instagrabber.models.enums.FavoriteType;
@@ -480,73 +479,81 @@ public class HashTagFragment extends Fragment implements SwipeRefreshLayout.OnRe
         final Context context = getContext();
         if (context == null) return;
         final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
-        favoriteRepository.getFavorite(hashtag, FavoriteType.HASHTAG, new RepositoryCallback<Favorite>() {
-            @Override
-            public void onSuccess(final Favorite result) {
-                favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                        result.getId(),
-                        hashtag,
-                        FavoriteType.HASHTAG,
-                        hashtagModel.getName(),
-                        "res:/" + R.drawable.ic_hashtag,
-                        result.getDateAdded()
-                ), new RepositoryCallback<Void>() {
-                    @Override
-                    public void onSuccess(final Void result) {
-                        hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                        hashtagDetailsBinding.favChip.setText(R.string.favorite_short);
+        favoriteRepository.getFavorite(
+                hashtag,
+                FavoriteType.HASHTAG,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null || favorite == null) {
+                        hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
+                        hashtagDetailsBinding.favChip.setText(R.string.add_to_favorites);
+                        return;
                     }
-
-                    @Override
-                    public void onDataNotAvailable() {}
-                });
-            }
-
-            @Override
-            public void onDataNotAvailable() {
-                hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
-                hashtagDetailsBinding.favChip.setText(R.string.add_to_favorites);
-            }
-        });
-        hashtagDetailsBinding.favChip.setOnClickListener(
-                v -> favoriteRepository.getFavorite(hashtag, FavoriteType.HASHTAG, new RepositoryCallback<Favorite>() {
-                    @Override
-                    public void onSuccess(final Favorite result) {
-                        favoriteRepository.deleteFavorite(hashtag, FavoriteType.HASHTAG, new RepositoryCallback<Void>() {
-                            @Override
-                            public void onSuccess(final Void result) {
+                    favoriteRepository.insertOrUpdateFavorite(
+                            new Favorite(
+                                    favorite.getId(),
+                                    hashtag,
+                                    FavoriteType.HASHTAG,
+                                    hashtagModel.getName(),
+                                    "res:/" + R.drawable.ic_hashtag,
+                                    favorite.getDateAdded()
+                            ),
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                    return;
+                                }
+                                hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                                hashtagDetailsBinding.favChip.setText(R.string.favorite_short);
+                            }), Dispatchers.getIO())
+                    );
+                }), Dispatchers.getIO())
+        );
+        hashtagDetailsBinding.favChip.setOnClickListener(v -> favoriteRepository.getFavorite(
+                hashtag,
+                FavoriteType.HASHTAG,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null) {
+                        Log.e(TAG, "setHashtagDetails: ", throwable);
+                        return;
+                    }
+                    if (favorite == null) {
+                        favoriteRepository.insertOrUpdateFavorite(
+                                new Favorite(
+                                        0,
+                                        hashtag,
+                                        FavoriteType.HASHTAG,
+                                        hashtagModel.getName(),
+                                        "res:/" + R.drawable.ic_hashtag,
+                                        LocalDateTime.now()
+                                ),
+                                CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                    if (throwable1 != null) {
+                                        Log.e(TAG, "onDataNotAvailable: ", throwable1);
+                                        return;
+                                    }
+                                    hashtagDetailsBinding.favChip.setText(R.string.favorite_short);
+                                    hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                                    showSnackbar(getString(R.string.added_to_favs));
+                                }), Dispatchers.getIO())
+                        );
+                        return;
+                    }
+                    favoriteRepository.deleteFavorite(
+                            hashtag,
+                            FavoriteType.HASHTAG,
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                    return;
+                                }
                                 hashtagDetailsBinding.favChip.setText(R.string.add_to_favorites);
                                 hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
                                 showSnackbar(getString(R.string.removed_from_favs));
-                            }
-
-                            @Override
-                            public void onDataNotAvailable() {}
-                        });
-                    }
-
-                    @Override
-                    public void onDataNotAvailable() {
-                        favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                                0,
-                                hashtag,
-                                FavoriteType.HASHTAG,
-                                hashtagModel.getName(),
-                                "res:/" + R.drawable.ic_hashtag,
-                                LocalDateTime.now()
-                        ), new RepositoryCallback<Void>() {
-                            @Override
-                            public void onSuccess(final Void result) {
-                                hashtagDetailsBinding.favChip.setText(R.string.favorite_short);
-                                hashtagDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                                showSnackbar(getString(R.string.added_to_favs));
-                            }
-
-                            @Override
-                            public void onDataNotAvailable() {}
-                        });
-                    }
-                }));
+                            }), Dispatchers.getIO())
+                    );
+                }), Dispatchers.getIO())
+                                                         )
+        );
         hashtagDetailsBinding.mainHashtagImage.setImageURI("res:/" + R.drawable.ic_hashtag);
         final String postCount = String.valueOf(hashtagModel.getMediaCount());
         final SpannableStringBuilder span = new SpannableStringBuilder(getResources().getQuantityString(R.plurals.main_posts_count_inline,

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

@@ -49,7 +49,6 @@ 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.db.repositories.RepositoryCallback;
 import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
 import awais.instagrabber.models.PostsLayoutPreferences;
 import awais.instagrabber.models.enums.FavoriteType;
@@ -493,75 +492,82 @@ public class LocationFragment extends Fragment implements SwipeRefreshLayout.OnR
         final FavoriteDataSource dataSource = FavoriteDataSource.getInstance(context);
         final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(dataSource);
         locationDetailsBinding.favChip.setVisibility(View.VISIBLE);
-        favoriteRepository.getFavorite(String.valueOf(locationId), FavoriteType.LOCATION, new RepositoryCallback<Favorite>() {
-            @Override
-            public void onSuccess(final Favorite result) {
-                locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                locationDetailsBinding.favChip.setText(R.string.favorite_short);
-                favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                        result.getId(),
-                        String.valueOf(locationId),
-                        FavoriteType.LOCATION,
-                        locationModel.getName(),
-                        "res:/" + R.drawable.ic_location,
-                        result.getDateAdded()
-                ), new RepositoryCallback<Void>() {
-                    @Override
-                    public void onSuccess(final Void result) {}
-
-                    @Override
-                    public void onDataNotAvailable() {}
-                });
-            }
-
-            @Override
-            public void onDataNotAvailable() {
-                locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
-                locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
-                locationDetailsBinding.favChip.setText(R.string.add_to_favorites);
-            }
-        });
-        locationDetailsBinding.favChip.setOnClickListener(v -> {
-            favoriteRepository.getFavorite(String.valueOf(locationId), FavoriteType.LOCATION, new RepositoryCallback<Favorite>() {
-                @Override
-                public void onSuccess(final Favorite result) {
-                    favoriteRepository.deleteFavorite(String.valueOf(locationId), FavoriteType.LOCATION, new RepositoryCallback<Void>() {
-                        @Override
-                        public void onSuccess(final Void result) {
-                            locationDetailsBinding.favChip.setText(R.string.add_to_favorites);
-                            locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
-                            showSnackbar(getString(R.string.removed_from_favs));
-                        }
-
-                        @Override
-                        public void onDataNotAvailable() {}
-                    });
-                }
-
-                @Override
-                public void onDataNotAvailable() {
-                    favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                            0,
+        favoriteRepository.getFavorite(
+                String.valueOf(locationId),
+                FavoriteType.LOCATION,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null || favorite == null) {
+                        locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
+                        locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
+                        locationDetailsBinding.favChip.setText(R.string.add_to_favorites);
+                        Log.e(TAG, "setupLocationDetails: ", throwable);
+                        return;
+                    }
+                    locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                    locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                    locationDetailsBinding.favChip.setText(R.string.favorite_short);
+                    favoriteRepository.insertOrUpdateFavorite(
+                            new Favorite(
+                                    favorite.getId(),
+                                    String.valueOf(locationId),
+                                    FavoriteType.LOCATION,
+                                    locationModel.getName(),
+                                    "res:/" + R.drawable.ic_location,
+                                    favorite.getDateAdded()
+                            ),
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                }
+                            }), Dispatchers.getIO())
+                    );
+                }), Dispatchers.getIO())
+        );
+        locationDetailsBinding.favChip.setOnClickListener(v -> favoriteRepository.getFavorite(
+                String.valueOf(locationId),
+                FavoriteType.LOCATION,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null) {
+                        Log.e(TAG, "setupLocationDetails: ", throwable);
+                        return;
+                    }
+                    if (favorite == null) {
+                        favoriteRepository.insertOrUpdateFavorite(
+                                new Favorite(
+                                        0,
+                                        String.valueOf(locationId),
+                                        FavoriteType.LOCATION,
+                                        locationModel.getName(),
+                                        "res:/" + R.drawable.ic_location,
+                                        LocalDateTime.now()
+                                ),
+                                CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                    if (throwable1 != null) {
+                                        Log.e(TAG, "onDataNotAvailable: ", throwable1);
+                                        return;
+                                    }
+                                    locationDetailsBinding.favChip.setText(R.string.favorite_short);
+                                    locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                                    showSnackbar(getString(R.string.added_to_favs));
+                                }), Dispatchers.getIO())
+                        );
+                        return;
+                    }
+                    favoriteRepository.deleteFavorite(
                             String.valueOf(locationId),
                             FavoriteType.LOCATION,
-                            locationModel.getName(),
-                            "res:/" + R.drawable.ic_location,
-                            LocalDateTime.now()
-                    ), new RepositoryCallback<Void>() {
-                        @Override
-                        public void onSuccess(final Void result) {
-                            locationDetailsBinding.favChip.setText(R.string.favorite_short);
-                            locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                            showSnackbar(getString(R.string.added_to_favs));
-                        }
-
-                        @Override
-                        public void onDataNotAvailable() {}
-                    });
-                }
-            });
-        });
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                    return;
+                                }
+                                locationDetailsBinding.favChip.setText(R.string.add_to_favorites);
+                                locationDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
+                                showSnackbar(getString(R.string.removed_from_favs));
+                            }), Dispatchers.getIO())
+                    );
+                }), Dispatchers.getIO())
+        ));
         locationDetailsBinding.mainLocationImage.setOnClickListener(v -> {
             if (hasStories) {
                 // show stories

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

@@ -65,7 +65,6 @@ import awais.instagrabber.db.datasources.FavoriteDataSource;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.AccountRepository;
 import awais.instagrabber.db.repositories.FavoriteRepository;
-import awais.instagrabber.db.repositories.RepositoryCallback;
 import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
 import awais.instagrabber.dialogs.ProfilePicDialogFragment;
 import awais.instagrabber.fragments.PostViewV2Fragment;
@@ -702,76 +701,80 @@ public class ProfileFragment extends Fragment implements SwipeRefreshLayout.OnRe
 
         setupButtons(profileId);
         final FavoriteRepository favoriteRepository = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(getContext()));
-        favoriteRepository.getFavorite(profileModel.getUsername(), FavoriteType.USER, new RepositoryCallback<Favorite>() {
-            @Override
-            public void onSuccess(final Favorite result) {
-                profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                profileDetailsBinding.favChip.setText(R.string.favorite_short);
-                favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                        result.getId(),
-                        profileModel.getUsername(),
-                        FavoriteType.USER,
-                        profileModel.getFullName(),
-                        profileModel.getProfilePicUrl(),
-                        result.getDateAdded()
-                ), new RepositoryCallback<Void>() {
-                    @Override
-                    public void onSuccess(final Void result) {
+        favoriteRepository.getFavorite(
+                profileModel.getUsername(),
+                FavoriteType.USER,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null || favorite == null) {
+                        profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
+                        profileDetailsBinding.favChip.setText(R.string.add_to_favorites);
+                        Log.e(TAG, "setProfileDetails: ", throwable);
+                        return;
                     }
-
-                    @Override
-                    public void onDataNotAvailable() {
+                    profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                    profileDetailsBinding.favChip.setText(R.string.favorite_short);
+                    favoriteRepository.insertOrUpdateFavorite(
+                            new Favorite(
+                                    favorite.getId(),
+                                    profileModel.getUsername(),
+                                    FavoriteType.USER,
+                                    profileModel.getFullName(),
+                                    profileModel.getProfilePicUrl(),
+                                    favorite.getDateAdded()
+                            ),
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                }
+                            }), Dispatchers.getIO())
+                    );
+                }))
+        );
+        profileDetailsBinding.favChip.setOnClickListener(v -> favoriteRepository.getFavorite(
+                profileModel.getUsername(),
+                FavoriteType.USER,
+                CoroutineUtilsKt.getContinuation((favorite, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null) {
+                        Log.e(TAG, "setProfileDetails: ", throwable);
+                        return;
                     }
-                });
-            }
-
-            @Override
-            public void onDataNotAvailable() {
-                profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
-                profileDetailsBinding.favChip.setText(R.string.add_to_favorites);
-            }
-        });
-        profileDetailsBinding.favChip.setOnClickListener(
-                v -> favoriteRepository.getFavorite(profileModel.getUsername(), FavoriteType.USER, new RepositoryCallback<Favorite>() {
-                    @Override
-                    public void onSuccess(final Favorite result) {
-                        favoriteRepository.deleteFavorite(profileModel.getUsername(), FavoriteType.USER, new RepositoryCallback<Void>() {
-                            @Override
-                            public void onSuccess(final Void result) {
+                    if (favorite == null) {
+                        favoriteRepository.insertOrUpdateFavorite(
+                                new Favorite(
+                                        0,
+                                        profileModel.getUsername(),
+                                        FavoriteType.USER,
+                                        profileModel.getFullName(),
+                                        profileModel.getProfilePicUrl(),
+                                        LocalDateTime.now()
+                                ),
+                                CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                    if (throwable1 != null) {
+                                        Log.e(TAG, "onDataNotAvailable: ", throwable1);
+                                        return;
+                                    }
+                                    profileDetailsBinding.favChip.setText(R.string.favorite_short);
+                                    profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
+                                    showSnackbar(getString(R.string.added_to_favs));
+                                }), Dispatchers.getIO())
+                        );
+                        return;
+                    }
+                    favoriteRepository.deleteFavorite(
+                            profileModel.getUsername(),
+                            FavoriteType.USER,
+                            CoroutineUtilsKt.getContinuation((unit, throwable1) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                                if (throwable1 != null) {
+                                    Log.e(TAG, "onSuccess: ", throwable1);
+                                    return;
+                                }
                                 profileDetailsBinding.favChip.setText(R.string.add_to_favorites);
                                 profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_outline_star_plus_24);
                                 showSnackbar(getString(R.string.removed_from_favs));
-                            }
-
-                            @Override
-                            public void onDataNotAvailable() {
-                            }
-                        });
-                    }
-
-                    @Override
-                    public void onDataNotAvailable() {
-                        favoriteRepository.insertOrUpdateFavorite(new Favorite(
-                                0,
-                                profileModel.getUsername(),
-                                FavoriteType.USER,
-                                profileModel.getFullName(),
-                                profileModel.getProfilePicUrl(),
-                                LocalDateTime.now()
-                        ), new RepositoryCallback<Void>() {
-                            @Override
-                            public void onSuccess(final Void result) {
-                                profileDetailsBinding.favChip.setText(R.string.favorite_short);
-                                profileDetailsBinding.favChip.setChipIconResource(R.drawable.ic_star_check_24);
-                                showSnackbar(getString(R.string.added_to_favs));
-                            }
-
-                            @Override
-                            public void onDataNotAvailable() {
-                            }
-                        });
-                    }
-                }));
+                            }), Dispatchers.getIO())
+                    );
+                }), Dispatchers.getIO())
+        ));
         profileDetailsBinding.mainProfileImage.setImageURI(profileModel.getProfilePicUrl());
         profileDetailsBinding.mainProfileImage.setVisibility(View.VISIBLE);
 

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

@@ -38,7 +38,6 @@ import awais.instagrabber.db.entities.Account;
 import awais.instagrabber.db.entities.Favorite;
 import awais.instagrabber.db.repositories.AccountRepository;
 import awais.instagrabber.db.repositories.FavoriteRepository;
-import awais.instagrabber.db.repositories.RepositoryCallback;
 import awais.instagrabber.interfaces.FetchListener;
 import awais.instagrabber.models.enums.FavoriteType;
 import awais.instagrabber.utils.PasswordUtils.IncorrectPasswordException;
@@ -161,17 +160,20 @@ public final class ExportImportUtils {
             );
             // Log.d(TAG, "importJson: favoriteModel: " + favoriteModel);
             final FavoriteRepository favRepo = FavoriteRepository.getInstance(FavoriteDataSource.getInstance(context));
-            favRepo.getFavorite(query, favoriteType, new RepositoryCallback<Favorite>() {
-                @Override
-                public void onSuccess(final Favorite result) {
-                    // local has priority since it's more frequently updated
-                }
-
-                @Override
-                public void onDataNotAvailable() {
-                    favRepo.insertOrUpdateFavorite(favorite, null);
-                }
-            });
+            favRepo.getFavorite(
+                    query,
+                    favoriteType,
+                    CoroutineUtilsKt.getContinuation((favorite1, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                        if (throwable != null) {
+                            Log.e(TAG, "importFavorites: ", throwable);
+                            return;
+                        }
+                        if (favorite1 == null) {
+                            favRepo.insertOrUpdateFavorite(favorite, CoroutineUtilsKt.getContinuation((unit, throwable1) -> {}, Dispatchers.getIO()));
+                        }
+                        // local has priority since it's more frequently updated
+                    }), Dispatchers.getIO())
+            );
         }
     }
 
@@ -198,7 +200,7 @@ public final class ExportImportUtils {
             return;
         }
         AccountRepository.getInstance(AccountDataSource.getInstance(context))
-                         .insertOrUpdateAccounts(accounts, null);
+                         .insertOrUpdateAccounts(accounts, CoroutineUtilsKt.getContinuation((unit, throwable) -> {}, Dispatchers.getIO()));
     }
 
     private static void importSettings(final JSONObject jsonObject) {
@@ -364,33 +366,32 @@ 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));
-        favoriteRepository.getAllFavorites(new RepositoryCallback<List<Favorite>>() {
-            @Override
-            public void onSuccess(final List<Favorite> favorites) {
-                final JSONArray jsonArray = new JSONArray();
-                try {
-                    for (final Favorite favorite : favorites) {
-                        final JSONObject jsonObject = new JSONObject();
-                        jsonObject.put("q", favorite.getQuery());
-                        jsonObject.put("type", favorite.getType().toString());
-                        jsonObject.put("s", favorite.getDisplayName());
-                        jsonObject.put("pic_url", favorite.getPicUrl());
-                        jsonObject.put("d", favorite.getDateAdded().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
-                        jsonArray.put(jsonObject);
+        favoriteRepository.getAllFavorites(
+                CoroutineUtilsKt.getContinuation((favorites, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null) {
+                        future.set(new JSONArray());
+                        Log.e(TAG, "getFavorites: ", throwable);
+                        return;
                     }
-                } catch (Exception e) {
-                    if (BuildConfig.DEBUG) {
-                        Log.e(TAG, "Error exporting favorites", e);
+                    final JSONArray jsonArray = new JSONArray();
+                    try {
+                        for (final Favorite favorite : favorites) {
+                            final JSONObject jsonObject = new JSONObject();
+                            jsonObject.put("q", favorite.getQuery());
+                            jsonObject.put("type", favorite.getType().toString());
+                            jsonObject.put("s", favorite.getDisplayName());
+                            jsonObject.put("pic_url", favorite.getPicUrl());
+                            jsonObject.put("d", favorite.getDateAdded().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
+                            jsonArray.put(jsonObject);
+                        }
+                    } catch (Exception e) {
+                        if (BuildConfig.DEBUG) {
+                            Log.e(TAG, "Error exporting favorites", e);
+                        }
                     }
-                }
-                future.set(jsonArray);
-            }
-
-            @Override
-            public void onDataNotAvailable() {
-                future.set(new JSONArray());
-            }
-        });
+                    future.set(jsonArray);
+                }), Dispatchers.getIO())
+        );
         return future;
     }
 

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

@@ -1,13 +1,18 @@
 package awais.instagrabber.viewmodels
 
 import android.app.Application
+import android.util.Log
 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.db.repositories.RepositoryCallback
+import awais.instagrabber.utils.extensions.TAG
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 class FavoritesViewModel(application: Application) : AndroidViewModel(application) {
     private val _list = MutableLiveData<List<Favorite>>()
@@ -20,29 +25,24 @@ class FavoritesViewModel(application: Application) : AndroidViewModel(applicatio
     }
 
     fun fetch() {
-        favoriteRepository.getAllFavorites(object : RepositoryCallback<List<Favorite>> {
-            override fun onSuccess(favorites: List<Favorite>?) {
-                _list.postValue(favorites ?: emptyList())
+        viewModelScope.launch(Dispatchers.IO) {
+            try {
+                _list.postValue(favoriteRepository.getAllFavorites())
+            } catch (e: Exception) {
+                Log.e(TAG, "fetch: ", e)
             }
-
-            override fun onDataNotAvailable() {}
-        })
+        }
     }
 
     fun delete(favorite: Favorite, onSuccess: () -> Unit) {
-        favoriteRepository.deleteFavorite(favorite.query, favorite.type, object : RepositoryCallback<Void> {
-            override fun onSuccess(result: Void?) {
-                onSuccess()
-                favoriteRepository.getAllFavorites(object : RepositoryCallback<List<Favorite>> {
-                    override fun onSuccess(result: List<Favorite>?) {
-                        _list.postValue(result ?: emptyList())
-                    }
-
-                    override fun onDataNotAvailable() {}
-                })
+        viewModelScope.launch(Dispatchers.IO) {
+            try {
+                favoriteRepository.deleteFavorite(favorite.query, favorite.type)
+                withContext(Dispatchers.Main) { onSuccess() }
+                _list.postValue(favoriteRepository.getAllFavorites())
+            } catch (e: Exception) {
+                Log.e(TAG, "delete: ", e)
             }
-
-            override fun onDataNotAvailable() {}
-        })
+        }
     }
 }

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

@@ -33,9 +33,11 @@ import awais.instagrabber.repositories.responses.search.SearchResponse;
 import awais.instagrabber.utils.AppExecutors;
 import awais.instagrabber.utils.Constants;
 import awais.instagrabber.utils.CookieUtils;
+import awais.instagrabber.utils.CoroutineUtilsKt;
 import awais.instagrabber.utils.Debouncer;
 import awais.instagrabber.utils.TextUtils;
 import awais.instagrabber.webservices.SearchService;
+import kotlinx.coroutines.Dispatchers;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -191,17 +193,17 @@ public class SearchFragmentViewModel extends AppStateViewModel {
                 recentResultsFuture.set(Collections.emptyList());
             }
         });
-        favoriteRepository.getAllFavorites(new RepositoryCallback<List<Favorite>>() {
-            @Override
-            public void onSuccess(final List<Favorite> result) {
-                favoritesFuture.set(result);
-            }
-
-            @Override
-            public void onDataNotAvailable() {
-                favoritesFuture.set(Collections.emptyList());
-            }
-        });
+        favoriteRepository.getAllFavorites(
+                CoroutineUtilsKt.getContinuation((favorites, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
+                    if (throwable != null) {
+                        favoritesFuture.set(Collections.emptyList());
+                        Log.e(TAG, "showRecentSearchesAndFavorites: ", throwable);
+                        return;
+                    }
+                    //noinspection unchecked
+                    favoritesFuture.set((List<Favorite>) favorites);
+                }), Dispatchers.getIO())
+        );
         //noinspection UnstableApiUsage
         final ListenableFuture<List<List<?>>> listenableFuture = Futures.allAsList(recentResultsFuture, favoritesFuture);
         Futures.addCallback(listenableFuture, new FutureCallback<List<List<?>>>() {