remove discover topics

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

@@ -1,393 +0,0 @@
-package awais.instagrabber.fragments;
-
-import android.animation.ArgbEvaluator;
-import android.content.Context;
-import android.graphics.Color;
-import android.graphics.PorterDuff;
-import android.graphics.drawable.Animatable;
-import android.graphics.drawable.Drawable;
-import android.graphics.drawable.GradientDrawable;
-import android.os.Bundle;
-import android.os.Handler;
-import android.util.Log;
-import android.view.ActionMode;
-import android.view.LayoutInflater;
-import android.view.Menu;
-import android.view.MenuInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.activity.OnBackPressedCallback;
-import androidx.activity.OnBackPressedDispatcher;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.graphics.ColorUtils;
-import androidx.fragment.app.Fragment;
-import androidx.navigation.NavDirections;
-import androidx.navigation.fragment.NavHostFragment;
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-import androidx.transition.ChangeBounds;
-import androidx.transition.TransitionInflater;
-import androidx.transition.TransitionSet;
-
-import com.facebook.drawee.backends.pipeline.Fresco;
-import com.facebook.drawee.controller.BaseControllerListener;
-import com.facebook.drawee.interfaces.DraweeController;
-import com.facebook.imagepipeline.image.ImageInfo;
-import com.google.common.collect.ImmutableList;
-
-import java.util.Set;
-
-import awais.instagrabber.R;
-import awais.instagrabber.activities.MainActivity;
-import awais.instagrabber.adapters.FeedAdapterV2;
-import awais.instagrabber.asyncs.DiscoverPostFetchService;
-import awais.instagrabber.customviews.PrimaryActionModeCallback;
-import awais.instagrabber.databinding.FragmentTopicPostsBinding;
-import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
-import awais.instagrabber.models.PostsLayoutPreferences;
-import awais.instagrabber.repositories.responses.Location;
-import awais.instagrabber.repositories.responses.Media;
-import awais.instagrabber.repositories.responses.User;
-import awais.instagrabber.repositories.responses.discover.TopicCluster;
-import awais.instagrabber.utils.AppExecutors;
-import awais.instagrabber.utils.Constants;
-import awais.instagrabber.utils.DownloadUtils;
-import awais.instagrabber.utils.ResponseBodyUtils;
-import awais.instagrabber.utils.Utils;
-import awais.instagrabber.webservices.DiscoverService;
-
-public class TopicPostsFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
-    private static final String TAG = TopicPostsFragment.class.getSimpleName();
-
-    private MainActivity fragmentActivity;
-    private FragmentTopicPostsBinding binding;
-    private CoordinatorLayout root;
-    private boolean shouldRefresh = true;
-    private TopicCluster topicCluster;
-    private ActionMode actionMode;
-    private Set<Media> selectedFeedModels;
-    private PostsLayoutPreferences layoutPreferences = Utils.getPostsLayoutPreferences(Constants.PREF_TOPIC_POSTS_LAYOUT);
-
-    private final OnBackPressedCallback onBackPressedCallback = new OnBackPressedCallback(false) {
-        @Override
-        public void handleOnBackPressed() {
-            binding.posts.endSelection();
-        }
-    };
-    private final PrimaryActionModeCallback multiSelectAction = new PrimaryActionModeCallback(
-            R.menu.multi_select_download_menu, new PrimaryActionModeCallback.CallbacksHelper() {
-        @Override
-        public void onDestroy(final ActionMode mode) {
-            binding.posts.endSelection();
-        }
-
-        @Override
-        public boolean onActionItemClicked(final ActionMode mode,
-                                           final MenuItem item) {
-            if (item.getItemId() == R.id.action_download) {
-                if (TopicPostsFragment.this.selectedFeedModels == null) return false;
-                final Context context = getContext();
-                if (context == null) return false;
-                DownloadUtils.download(context, ImmutableList.copyOf(TopicPostsFragment.this.selectedFeedModels));
-                binding.posts.endSelection();
-                return true;
-            }
-            return false;
-        }
-    });
-    private final FeedAdapterV2.FeedItemCallback feedItemCallback = new FeedAdapterV2.FeedItemCallback() {
-        @Override
-        public void onPostClick(final Media feedModel) {
-            openPostDialog(feedModel, -1);
-        }
-
-        @Override
-        public void onSliderClick(final Media feedModel, final int position) {
-            openPostDialog(feedModel, position);
-        }
-
-        @Override
-        public void onCommentsClick(final Media feedModel) {
-            final User user = feedModel.getUser();
-            if (user == null) return;
-            final NavDirections commentsAction = TopicPostsFragmentDirections.actionToComments(
-                    feedModel.getCode(),
-                    feedModel.getPk(),
-                    user.getPk()
-            );
-            NavHostFragment.findNavController(TopicPostsFragment.this).navigate(commentsAction);
-        }
-
-        @Override
-        public void onDownloadClick(final Media feedModel, final int childPosition, final View popupLocation) {
-            final Context context = getContext();
-            if (context == null) return;
-            DownloadUtils.showDownloadDialog(context, feedModel, childPosition, popupLocation);
-        }
-
-        @Override
-        public void onHashtagClick(final String hashtag) {
-            final NavDirections action = TopicPostsFragmentDirections.actionToHashtag(hashtag);
-            NavHostFragment.findNavController(TopicPostsFragment.this).navigate(action);
-        }
-
-        @Override
-        public void onLocationClick(final Media feedModel) {
-            final Location location = feedModel.getLocation();
-            if (location == null) return;
-            final NavDirections action = TopicPostsFragmentDirections.actionToLocation(location.getPk());
-            NavHostFragment.findNavController(TopicPostsFragment.this).navigate(action);
-        }
-
-        @Override
-        public void onMentionClick(final String mention) {
-            navigateToProfile(mention.trim());
-        }
-
-        @Override
-        public void onNameClick(final Media feedModel) {
-            navigateToProfile("@" + feedModel.getUser().getUsername());
-        }
-
-        @Override
-        public void onProfilePicClick(final Media feedModel) {
-            final User user = feedModel.getUser();
-            if (user == null) return;
-            navigateToProfile("@" + user.getUsername());
-        }
-
-        @Override
-        public void onURLClick(final String url) {
-            Utils.openURL(getContext(), url);
-        }
-
-        @Override
-        public void onEmailClick(final String emailId) {
-            Utils.openEmailAddress(getContext(), emailId);
-        }
-
-        private void openPostDialog(final Media feedModel, final int position) {
-            try {
-                final NavDirections action = TopicPostsFragmentDirections.actionToPost(feedModel, position);
-                NavHostFragment.findNavController(TopicPostsFragment.this).navigate(action);
-            } catch (Exception e) {
-                Log.e(TAG, "openPostDialog: ", e);
-            }
-        }
-    };
-    private final FeedAdapterV2.SelectionModeCallback selectionModeCallback = new FeedAdapterV2.SelectionModeCallback() {
-
-        @Override
-        public void onSelectionStart() {
-            if (!onBackPressedCallback.isEnabled()) {
-                final OnBackPressedDispatcher onBackPressedDispatcher = fragmentActivity.getOnBackPressedDispatcher();
-                onBackPressedCallback.setEnabled(true);
-                onBackPressedDispatcher.addCallback(getViewLifecycleOwner(), onBackPressedCallback);
-            }
-            if (actionMode == null) {
-                actionMode = fragmentActivity.startActionMode(multiSelectAction);
-            }
-        }
-
-        @Override
-        public void onSelectionChange(final Set<Media> selectedFeedModels) {
-            final String title = getString(R.string.number_selected, selectedFeedModels.size());
-            if (actionMode != null) {
-                actionMode.setTitle(title);
-            }
-            TopicPostsFragment.this.selectedFeedModels = selectedFeedModels;
-        }
-
-        @Override
-        public void onSelectionEnd() {
-            if (onBackPressedCallback.isEnabled()) {
-                onBackPressedCallback.setEnabled(false);
-                onBackPressedCallback.remove();
-            }
-            if (actionMode != null) {
-                actionMode.finish();
-                actionMode = null;
-            }
-        }
-    };
-
-    @Override
-    public void onCreate(@Nullable final Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        fragmentActivity = (MainActivity) requireActivity();
-        final Context context = getContext();
-        if (context != null) {
-            final TransitionSet transitionSet = new TransitionSet();
-            transitionSet.addTransition(new ChangeBounds())
-                         .addTransition(TransitionInflater.from(context).inflateTransition(android.R.transition.move))
-                         .setDuration(200);
-            setSharedElementEnterTransition(transitionSet);
-        }
-        postponeEnterTransition();
-        setHasOptionsMenu(true);
-    }
-
-    @Nullable
-    @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater,
-                             @Nullable final ViewGroup container,
-                             @Nullable final Bundle savedInstanceState) {
-        if (root != null) {
-            shouldRefresh = false;
-            return root;
-        }
-        binding = FragmentTopicPostsBinding.inflate(inflater, container, false);
-        root = binding.getRoot();
-        return root;
-    }
-
-    @Override
-    public void onViewCreated(@NonNull final View view, @Nullable final Bundle savedInstanceState) {
-        if (!shouldRefresh) return;
-        binding.swipeRefreshLayout.setOnRefreshListener(this);
-        init();
-        shouldRefresh = false;
-    }
-
-    @Override
-    public void onCreateOptionsMenu(@NonNull final Menu menu, @NonNull final MenuInflater inflater) {
-        inflater.inflate(R.menu.topic_posts_menu, menu);
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(@NonNull final MenuItem item) {
-        if (item.getItemId() == R.id.layout) {
-            showPostsLayoutPreferences();
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        fragmentActivity.setToolbar(binding.toolbar, this);
-    }
-
-    @Override
-    public void onRefresh() {
-        binding.posts.refresh();
-    }
-
-    @Override
-    public void onStop() {
-        super.onStop();
-        fragmentActivity.resetToolbar(this);
-    }
-
-    private void init() {
-        if (getArguments() == null) return;
-        final TopicPostsFragmentArgs fragmentArgs = TopicPostsFragmentArgs.fromBundle(getArguments());
-        topicCluster = fragmentArgs.getTopicCluster();
-        setupToolbar(fragmentArgs.getTitleColor(), fragmentArgs.getBackgroundColor());
-        setupPosts();
-    }
-
-    private void setupToolbar(final int titleColor, final int backgroundColor) {
-        if (topicCluster == null) {
-            return;
-        }
-        binding.cover.setTransitionName("cover-" + topicCluster.getId());
-        fragmentActivity.setToolbar(binding.toolbar, this);
-        binding.collapsingToolbarLayout.setTitle(topicCluster.getTitle());
-        final int collapsedTitleTextColor = ColorUtils.setAlphaComponent(titleColor, 0xFF);
-        final int expandedTitleTextColor = ColorUtils.setAlphaComponent(titleColor, 0x99);
-        binding.collapsingToolbarLayout.setExpandedTitleColor(expandedTitleTextColor);
-        binding.collapsingToolbarLayout.setCollapsedTitleTextColor(collapsedTitleTextColor);
-        binding.collapsingToolbarLayout.setContentScrimColor(backgroundColor);
-        final Drawable navigationIcon = binding.toolbar.getNavigationIcon();
-        final Drawable overflowIcon = binding.toolbar.getOverflowIcon();
-        if (navigationIcon != null && overflowIcon != null) {
-            final Drawable navDrawable = navigationIcon.mutate();
-            final Drawable overflowDrawable = overflowIcon.mutate();
-            navDrawable.setAlpha(0xFF);
-            overflowDrawable.setAlpha(0xFF);
-            final ArgbEvaluator argbEvaluator = new ArgbEvaluator();
-            binding.appBarLayout.addOnOffsetChangedListener((appBarLayout, verticalOffset) -> {
-                final int totalScrollRange = appBarLayout.getTotalScrollRange();
-                final float current = totalScrollRange + verticalOffset;
-                final float fraction = current / totalScrollRange;
-                final int tempColor = (int) argbEvaluator.evaluate(fraction, collapsedTitleTextColor, expandedTitleTextColor);
-                navDrawable.setColorFilter(tempColor, PorterDuff.Mode.SRC_ATOP);
-                overflowDrawable.setColorFilter(tempColor, PorterDuff.Mode.SRC_ATOP);
-
-            });
-        }
-        final GradientDrawable gd = new GradientDrawable(
-                GradientDrawable.Orientation.TOP_BOTTOM,
-                new int[]{Color.TRANSPARENT, backgroundColor});
-        binding.background.setBackground(gd);
-        setupCover();
-    }
-
-    private void setupCover() {
-        final String coverUrl = ResponseBodyUtils.getImageUrl(topicCluster.getCoverMedia());
-        final DraweeController controller = Fresco
-                .newDraweeControllerBuilder()
-                .setOldController(binding.cover.getController())
-                .setUri(coverUrl)
-                .setControllerListener(new BaseControllerListener<ImageInfo>() {
-
-                    @Override
-                    public void onFailure(final String id, final Throwable throwable) {
-                        super.onFailure(id, throwable);
-                        startPostponedEnterTransition();
-                    }
-
-                    @Override
-                    public void onFinalImageSet(final String id,
-                                                @Nullable final ImageInfo imageInfo,
-                                                @Nullable final Animatable animatable) {
-                        startPostponedEnterTransition();
-                    }
-                })
-                .build();
-        binding.cover.setController(controller);
-    }
-
-    private void setupPosts() {
-        final DiscoverService.TopicalExploreRequest topicalExploreRequest = new DiscoverService.TopicalExploreRequest();
-        topicalExploreRequest.setClusterId(topicCluster.getId());
-        binding.posts.setViewModelStoreOwner(this)
-                     .setLifeCycleOwner(this)
-                     .setPostFetchService(new DiscoverPostFetchService(topicalExploreRequest))
-                     .setLayoutPreferences(layoutPreferences)
-                     .addFetchStatusChangeListener(fetching -> updateSwipeRefreshState())
-                     .setFeedItemCallback(feedItemCallback)
-                     .setSelectionModeCallback(selectionModeCallback)
-                     .init();
-        binding.swipeRefreshLayout.setRefreshing(true);
-    }
-
-    private void updateSwipeRefreshState() {
-        AppExecutors.INSTANCE.getMainThread().execute(() -> binding.swipeRefreshLayout.setRefreshing(binding.posts.isFetching())
-        );
-    }
-
-    private void navigateToProfile(final String username) {
-        try {
-            final NavDirections action = TopicPostsFragmentDirections.actionToProfile().setUsername(username);
-            NavHostFragment.findNavController(this).navigate(action);
-        } catch (Exception e) {
-            Log.e(TAG, "navigateToProfile: ", e);
-        }
-    }
-
-    private void showPostsLayoutPreferences() {
-        final PostsLayoutPreferencesDialogFragment fragment = new PostsLayoutPreferencesDialogFragment(
-                Constants.PREF_TOPIC_POSTS_LAYOUT,
-                preferences -> {
-                    layoutPreferences = preferences;
-                    new Handler().postDelayed(() -> binding.posts.setLayoutPreferences(preferences), 200);
-                });
-        fragment.show(getChildFragmentManager(), "posts_layout_preferences");
-    }
-}

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

@@ -1,75 +1,235 @@
 package awais.instagrabber.fragments.main;
 
+import android.content.Context;
 import android.os.Bundle;
+import android.os.Handler;
 import android.util.Log;
+import android.view.ActionMode;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Toast;
 
+import androidx.activity.OnBackPressedCallback;
+import androidx.activity.OnBackPressedDispatcher;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.ActionBar;
-import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
-import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.NavDirections;
-import androidx.navigation.fragment.FragmentNavigator;
 import androidx.navigation.fragment.NavHostFragment;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
-import java.util.Collections;
+import com.google.common.collect.ImmutableList;
-import java.util.List;
+
+import java.util.Set;
 
 import awais.instagrabber.R;
 import awais.instagrabber.activities.MainActivity;
-import awais.instagrabber.adapters.DiscoverTopicsAdapter;
+import awais.instagrabber.adapters.FeedAdapterV2;
-import awais.instagrabber.customviews.helpers.GridSpacingItemDecoration;
+import awais.instagrabber.asyncs.DiscoverPostFetchService;
+import awais.instagrabber.customviews.PrimaryActionModeCallback;
 import awais.instagrabber.databinding.FragmentDiscoverBinding;
+import awais.instagrabber.dialogs.PostsLayoutPreferencesDialogFragment;
+import awais.instagrabber.models.PostsLayoutPreferences;
+import awais.instagrabber.models.enums.PostItemType;
+import awais.instagrabber.repositories.responses.Location;
 import awais.instagrabber.repositories.responses.Media;
-import awais.instagrabber.repositories.responses.discover.TopicCluster;
+import awais.instagrabber.repositories.responses.User;
-import awais.instagrabber.repositories.responses.discover.TopicalExploreFeedResponse;
 import awais.instagrabber.utils.AppExecutors;
-import awais.instagrabber.utils.CoroutineUtilsKt;
+import awais.instagrabber.utils.Constants;
+import awais.instagrabber.utils.CookieUtils;
+import awais.instagrabber.utils.DownloadUtils;
+import awais.instagrabber.utils.TextUtils;
 import awais.instagrabber.utils.Utils;
-import awais.instagrabber.viewmodels.TopicClusterViewModel;
 import awais.instagrabber.webservices.DiscoverService;
-import awais.instagrabber.webservices.MediaRepository;
+
-import awais.instagrabber.webservices.ServiceCallback;
+import static awais.instagrabber.utils.Utils.settingsHelper;
-import kotlinx.coroutines.Dispatchers;
 
 public class DiscoverFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
     private static final String TAG = "DiscoverFragment";
 
     private MainActivity fragmentActivity;
-    private CoordinatorLayout root;
+    private SwipeRefreshLayout root;
     private FragmentDiscoverBinding binding;
-    private TopicClusterViewModel topicClusterViewModel;
+    private ActionMode actionMode;
-    private boolean shouldRefresh = true;
+    private boolean isLoggedIn, shouldRefresh = true;
-    private DiscoverService discoverService;
+    private String keyword;
-    private MediaRepository mediaRepository;
+    private Set<Media> selectedFeedModels;
+    private PostsLayoutPreferences layoutPreferences = Utils.getPostsLayoutPreferences(Constants.PREF_TOPIC_POSTS_LAYOUT);
+
+    private final OnBackPressedCallback onBackPressedCallback = new OnBackPressedCallback(false) {
+        @Override
+        public void handleOnBackPressed() {
+            binding.posts.endSelection();
+        }
+    };
+    private final PrimaryActionModeCallback multiSelectAction = new PrimaryActionModeCallback(
+            R.menu.multi_select_download_menu,
+            new PrimaryActionModeCallback.CallbacksHelper() {
+                @Override
+                public void onDestroy(final ActionMode mode) {
+                    binding.posts.endSelection();
+                }
+
+                @Override
+                public boolean onActionItemClicked(final ActionMode mode, final MenuItem item) {
+                    if (item.getItemId() == R.id.action_download) {
+                        if (selectedFeedModels == null) return false;
+                        final Context context = getContext();
+                        if (context == null) return false;
+                        DownloadUtils.download(context, ImmutableList.copyOf(DiscoverFragment.this.selectedFeedModels));
+                        binding.posts.endSelection();
+                    }
+                    return false;
+                }
+            });
+    private final FeedAdapterV2.FeedItemCallback feedItemCallback = new FeedAdapterV2.FeedItemCallback() {
+        @Override
+        public void onPostClick(final Media feedModel) {
+            openPostDialog(feedModel, -1);
+        }
+
+        @Override
+        public void onSliderClick(final Media feedModel, final int position) {
+            openPostDialog(feedModel, position);
+        }
+
+        @Override
+        public void onCommentsClick(final Media feedModel) {
+            final User user = feedModel.getUser();
+            if (user == null) return;
+            try {
+                final NavDirections commentsAction = ProfileFragmentDirections.actionToComments(
+                        feedModel.getCode(),
+                        feedModel.getPk(),
+                        user.getPk()
+                );
+                NavHostFragment.findNavController(DiscoverFragment.this).navigate(commentsAction);
+            } catch (Exception e) {
+                Log.e(TAG, "onCommentsClick: ", e);
+            }
+        }
+
+        @Override
+        public void onDownloadClick(final Media feedModel, final int childPosition, final View popupLocation) {
+            final Context context = getContext();
+            if (context == null) return;
+            DownloadUtils.showDownloadDialog(context, feedModel, childPosition, popupLocation);
+        }
+
+        @Override
+        public void onHashtagClick(final String hashtag) {
+            try {
+                final NavDirections action = ProfileFragmentDirections.actionToHashtag(hashtag);
+                NavHostFragment.findNavController(DiscoverFragment.this).navigate(action);
+            } catch (Exception e) {
+                Log.e(TAG, "onHashtagClick: ", e);
+            }
+        }
+
+        @Override
+        public void onLocationClick(final Media feedModel) {
+            final Location location = feedModel.getLocation();
+            if (location == null) return;
+            try {
+                final NavDirections action = ProfileFragmentDirections.actionToLocation(location.getPk());
+                NavHostFragment.findNavController(DiscoverFragment.this).navigate(action);
+            } catch (Exception e) {
+                Log.e(TAG, "onLocationClick: ", e);
+            }
+        }
+
+        @Override
+        public void onMentionClick(final String mention) {
+            navigateToProfile(mention.trim());
+        }
+
+        @Override
+        public void onNameClick(final Media feedModel) {
+            navigateToProfile("@" + feedModel.getUser().getUsername());
+        }
+
+        @Override
+        public void onProfilePicClick(final Media feedModel) {
+            final User user = feedModel.getUser();
+            if (user == null) return;
+            navigateToProfile("@" + user.getUsername());
+        }
+
+        @Override
+        public void onURLClick(final String url) {
+            Utils.openURL(getContext(), url);
+        }
+
+        @Override
+        public void onEmailClick(final String emailId) {
+            Utils.openEmailAddress(getContext(), emailId);
+        }
+
+        private void openPostDialog(final Media feedModel, final int position) {
+            try {
+                final NavDirections action = DiscoverFragmentDirections.actionToPost(feedModel, position);
+                NavHostFragment.findNavController(DiscoverFragment.this).navigate(action);
+            } catch (Exception e) {
+                Log.e(TAG, "openPostDialog: ", e);
+            }
+        }
+    };
+    private final FeedAdapterV2.SelectionModeCallback selectionModeCallback = new FeedAdapterV2.SelectionModeCallback() {
+
+        @Override
+        public void onSelectionStart() {
+            if (!onBackPressedCallback.isEnabled()) {
+                final OnBackPressedDispatcher onBackPressedDispatcher = fragmentActivity.getOnBackPressedDispatcher();
+                onBackPressedCallback.setEnabled(true);
+                onBackPressedDispatcher.addCallback(getViewLifecycleOwner(), onBackPressedCallback);
+            }
+            if (actionMode == null) {
+                actionMode = fragmentActivity.startActionMode(multiSelectAction);
+            }
+        }
+
+        @Override
+        public void onSelectionChange(final Set<Media> selectedFeedModels) {
+            final String title = getString(R.string.number_selected, selectedFeedModels.size());
+            if (actionMode != null) {
+                actionMode.setTitle(title);
+            }
+            DiscoverFragment.this.selectedFeedModels = selectedFeedModels;
+        }
+
+        @Override
+        public void onSelectionEnd() {
+            if (onBackPressedCallback.isEnabled()) {
+                onBackPressedCallback.setEnabled(false);
+                onBackPressedCallback.remove();
+            }
+            if (actionMode != null) {
+                actionMode.finish();
+                actionMode = null;
+            }
+        }
+    };
 
     @Override
     public void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        fragmentActivity = (MainActivity) requireActivity();
+        fragmentActivity = (MainActivity) getActivity();
-        discoverService = DiscoverService.getInstance();
+        setHasOptionsMenu(true);
-        // final String deviceUuid = Utils.settingsHelper.getString(Constants.DEVICE_UUID);
-        // final String cookie = Utils.settingsHelper.getString(Constants.COOKIE);
-        // final String csrfToken = CookieUtils.getCsrfTokenFromCookie(cookie);
-        // final long userId = CookieUtils.getUserIdFromCookie(cookie);
-        mediaRepository = MediaRepository.Companion.getInstance();
     }
 
     @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater,
+    public View onCreateView(@NonNull final LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable final Bundle savedInstanceState) {
-                             final ViewGroup container,
+        final String cookie = settingsHelper.getString(Constants.COOKIE);
-                             final Bundle savedInstanceState) {
+        isLoggedIn = !TextUtils.isEmpty(cookie) && CookieUtils.getUserIdFromCookie(cookie) > 0;
         if (root != null) {
             shouldRefresh = false;
             return root;
         }
-        binding = FragmentDiscoverBinding.inflate(inflater, container, false);
+        binding = FragmentDiscoverBinding.inflate(getLayoutInflater(), container, false);
         root = binding.getRoot();
         return root;
     }
@@ -82,92 +242,67 @@ public class DiscoverFragment extends Fragment implements SwipeRefreshLayout.OnR
         shouldRefresh = false;
     }
 
-    private void init() {
+    @Override
-        setupTopics();
+    public void onCreateOptionsMenu(@NonNull final Menu menu, @NonNull final MenuInflater inflater) {
-        fetchTopics();
+        inflater.inflate(R.menu.saved_viewer_menu, menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull final MenuItem item) {
+        if (item.getItemId() == R.id.layout) {
+            showPostsLayoutPreferences();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
     }
 
     @Override
     public void onRefresh() {
-        fetchTopics();
+        binding.posts.refresh();
     }
 
-    public void setupTopics() {
+    private void init() {
-        topicClusterViewModel = new ViewModelProvider(fragmentActivity).get(TopicClusterViewModel.class);
+        final Bundle arguments = getArguments();
-        binding.topicsRecyclerView.addItemDecoration(new GridSpacingItemDecoration(Utils.convertDpToPx(2)));
+        if (arguments == null) return;
-        final DiscoverTopicsAdapter.OnTopicClickListener otcl = new DiscoverTopicsAdapter.OnTopicClickListener() {
+        final DiscoverFragmentArgs fragmentArgs = DiscoverFragmentArgs.fromBundle(arguments);
-            public void onTopicClick(final TopicCluster topicCluster, final View cover, final int titleColor, final int backgroundColor) {
+        keyword = fragmentArgs.getKeyword();
-                try {
+        setupPosts();
-                    final FragmentNavigator.Extras.Builder builder = new FragmentNavigator.Extras.Builder()
-                            .addSharedElement(cover, "cover-" + topicCluster.getId());
-                    final NavDirections action = DiscoverFragmentDirections.actionToTopicPosts(topicCluster, titleColor, backgroundColor);
-                    NavHostFragment.findNavController(DiscoverFragment.this).navigate(action, builder.build());
-                } catch (Exception e) {
-                    Log.e(TAG, "onTopicClick: ", e);
-                }
-            }
-
-            public void onTopicLongClick(final Media coverMedia) {
-                final AlertDialog alertDialog = new AlertDialog.Builder(requireContext())
-                        .setCancelable(false)
-                        .setView(R.layout.dialog_opening_post)
-                        .create();
-                alertDialog.show();
-                final String pk = coverMedia.getPk();
-                if (pk == null) return;
-                mediaRepository.fetch(
-                        Long.parseLong(pk),
-                        CoroutineUtilsKt.getContinuation((media, throwable) -> AppExecutors.INSTANCE.getMainThread().execute(() -> {
-                            if (throwable != null) {
-                                alertDialog.dismiss();
-                                try {
-                                    Toast.makeText(requireContext(), R.string.downloader_unknown_error, Toast.LENGTH_SHORT).show();
-                                } catch (Throwable ignored) {}
-                                return;
-                            }
-                            try {
-                                final NavDirections action = DiscoverFragmentDirections.actionToPost(media, 0);
-                                NavHostFragment.findNavController(DiscoverFragment.this).navigate(action);
-                                alertDialog.dismiss();
-                            } catch (Exception e) {
-                                Log.e(TAG, "onTopicLongClick: ", e);
-                            }
-                        }), Dispatchers.getIO())
-                );
-            }
-        };
-        final DiscoverTopicsAdapter adapter = new DiscoverTopicsAdapter(otcl);
-        binding.topicsRecyclerView.setAdapter(adapter);
-        topicClusterViewModel.getList().observe(getViewLifecycleOwner(), adapter::submitList);
     }
 
-    private void fetchTopics() {
+    private void setupPosts() {
+        binding.posts.setViewModelStoreOwner(this)
+                .setLifeCycleOwner(this)
+                .setPostFetchService(new DiscoverPostFetchService(new DiscoverService.TopicalExploreRequest()))
+                .setLayoutPreferences(layoutPreferences)
+                .addFetchStatusChangeListener(fetching -> updateSwipeRefreshState())
+                .setFeedItemCallback(feedItemCallback)
+                .setSelectionModeCallback(selectionModeCallback)
+                .init();
         binding.swipeRefreshLayout.setRefreshing(true);
-        discoverService.topicalExplore(new DiscoverService.TopicalExploreRequest(), new ServiceCallback<TopicalExploreFeedResponse>() {
+    }
-            @Override
-            public void onSuccess(final TopicalExploreFeedResponse result) {
-                if (result == null) return;
-                final List<TopicCluster> clusters = result.getClusters();
-                if (clusters == null || result.getItems() == null) return;
-                binding.swipeRefreshLayout.setRefreshing(false);
-                if (clusters.size() == 1 && result.getItems().size() > 0) {
-                    final TopicCluster cluster = clusters.get(0);
-                    if (cluster.getCoverMedia() == null) {
-                        cluster.setCoverMedia(result.getItems().get(0).getMedia());
-                    }
-                    topicClusterViewModel.getList().postValue(Collections.singletonList(cluster));
-                    return;
-                }
-                if (clusters.size() > 1 || result.getItems().size() == 0) {
-                    topicClusterViewModel.getList().postValue(clusters);
-                }
-            }
 
-            @Override
+    private void updateSwipeRefreshState() {
-            public void onFailure(final Throwable t) {
+        AppExecutors.INSTANCE.getMainThread().execute(() ->
-                Log.e(TAG, "onFailure", t);
+                binding.swipeRefreshLayout.setRefreshing(binding.posts.isFetching())
-                binding.swipeRefreshLayout.setRefreshing(false);
+        );
-            }
+    }
-        });
+
+    private void navigateToProfile(final String username) {
+        try {
+            final NavDirections action = DiscoverFragmentDirections.actionToProfile().setUsername(username);
+            NavHostFragment.findNavController(this).navigate(action);
+        } catch (Exception e) {
+            Log.e(TAG, "navigateToProfile: ", e);
+        }
+    }
+
+    private void showPostsLayoutPreferences() {
+        final PostsLayoutPreferencesDialogFragment fragment = new PostsLayoutPreferencesDialogFragment(
+                Constants.PREF_TOPIC_POSTS_LAYOUT,
+                preferences -> {
+                    layoutPreferences = preferences;
+                    new Handler().postDelayed(() -> binding.posts.setLayoutPreferences(preferences), 200);
+                });
+        fragment.show(getChildFragmentManager(), "posts_layout_preferences");
     }
 }

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

@@ -1,27 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.swiperefreshlayout.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/swipe_refresh_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="?attr/colorSurface">
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context=".fragments.DiscoverFragment">
 
-    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+    <awais.instagrabber.customviews.PostsRecyclerView
-        android:id="@+id/swipe_refresh_layout"
+        android:id="@+id/posts"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:clipToPadding="false"
+        android:clipToPadding="false" />
-        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
-
-        <androidx.recyclerview.widget.RecyclerView
-            android:id="@+id/topics_recycler_view"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:clipToPadding="false"
-            android:paddingBottom="?actionBarSize"
-            app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
-            app:spanCount="2"
-            tools:itemCount="10"
-            tools:listitem="@layout/item_discover_topic" />
-    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
-</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/navigation/discover_nav_graph.xml

@@ -11,9 +11,27 @@
         android:label="@string/title_discover"
         tools:layout="@layout/fragment_discover">
 
+        <argument
+            android:name="keyword"
+            android:defaultValue="@null"
+            app:argType="string"
+            app:nullable="true" />
+
         <action
-            android:id="@+id/action_to_topic_posts"
+            android:id="@+id/action_to_comments"
-            app:destination="@id/topicPostsFragment" />
+            app:destination="@id/commentsViewerFragment" />
+
+        <action
+            android:id="@+id/action_to_hashtag"
+            app:destination="@id/hashTagFragment" />
+
+        <action
+            android:id="@+id/action_to_location"
+            app:destination="@id/locationFragment" />
+
+        <action
+            android:id="@+id/action_to_profile"
+            app:destination="@id/profile_non_top" />
 
         <action
             android:id="@+id/action_to_post"
@@ -346,44 +364,6 @@
             app:destination="@id/profile_non_top" />
     </dialog>
 
-    <fragment
-        android:id="@+id/topicPostsFragment"
-        android:name="awais.instagrabber.fragments.TopicPostsFragment"
-        tools:layout="@layout/fragment_topic_posts">
-
-        <argument
-            android:name="topicCluster"
-            app:argType="awais.instagrabber.repositories.responses.discover.TopicCluster" />
-
-        <argument
-            android:name="titleColor"
-            app:argType="integer" />
-
-        <argument
-            android:name="backgroundColor"
-            app:argType="integer" />
-
-        <action
-            android:id="@+id/action_to_comments"
-            app:destination="@id/commentsViewerFragment" />
-
-        <action
-            android:id="@+id/action_to_hashtag"
-            app:destination="@id/hashTagFragment" />
-
-        <action
-            android:id="@+id/action_to_location"
-            app:destination="@id/locationFragment" />
-
-        <action
-            android:id="@+id/action_to_profile"
-            app:destination="@id/profile_non_top" />
-
-        <action
-            android:id="@+id/action_to_post"
-            app:destination="@id/postViewFragment" />
-    </fragment>
-
     <!-- Copy of notification viewer fragment tag -->
     <!-- Required to get back arrow in action bar -->
     <!-- See https://issuetracker.google.com/issues/192395936 -->