Fix posts not marked as read in ViewPostDetailActivity if swipe between posts is enabled.

app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java

@@ -314,14 +314,6 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
         if (savedInstanceState == null) {
             viewPager2.setCurrentItem(getIntent().getIntExtra(EXTRA_POST_LIST_POSITION, 0), false);
         }
-        if (mSharedPreferences.getBoolean(mAccountName + SharedPreferencesUtils.MARK_POSTS_AS_READ_BASE, false)) {
-            viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
-                @Override
-                public void onPageSelected(int position) {
-                    //EventBus.getDefault().post(new (getClass().getName()));
-                }
-            });
-        }
 
         searchPanelMaterialCardView.setOnClickListener(null);
         

app/src/main/java/ml/docilealligator/infinityforreddit/fragments/PostFragment.java

@@ -18,6 +18,7 @@ import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
 import android.util.DisplayMetrics;
+import android.util.Log;
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
@@ -1578,6 +1579,9 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
                 post.setSpoiler(event.post.isSpoiler());
                 post.setFlair(event.post.getFlair());
                 post.setSaved(event.post.isSaved());
+                if (event.post.isRead()) {
+                    post.markAsRead(true);
+                }
                 mAdapter.notifyItemChanged(event.positionInList);
             }
         }

app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewPostDetailFragment.java

@@ -106,6 +106,7 @@ import ml.docilealligator.infinityforreddit.post.FetchRemovedPost;
 import ml.docilealligator.infinityforreddit.post.HidePost;
 import ml.docilealligator.infinityforreddit.post.ParsePost;
 import ml.docilealligator.infinityforreddit.post.Post;
+import ml.docilealligator.infinityforreddit.readpost.InsertReadPost;
 import ml.docilealligator.infinityforreddit.subreddit.FetchSubredditData;
 import ml.docilealligator.infinityforreddit.subreddit.SubredditData;
 import ml.docilealligator.infinityforreddit.utils.APIUtils;
@@ -170,6 +171,9 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
     @Named("post_details")
     SharedPreferences mPostDetailsSharedPreferences;
     @Inject
+    @Named("post_history")
+    SharedPreferences mPostHistorySharedPreferences;
+    @Inject
     CustomThemeWrapper mCustomThemeWrapper;
     @Inject
     ExoCreator mExoCreator;
@@ -219,6 +223,7 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
     private boolean mSwipeUpToHideFab;
     private boolean mExpandChildren;
     private boolean mSeparatePostAndComments = false;
+    private boolean mMarkPostsAsRead;
     private int mWindowWidth;
     private ConcatAdapter mConcatAdapter;
     private PostDetailRecyclerViewAdapter mPostAdapter;
@@ -292,6 +297,7 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
         mLockFab = mSharedPreferences.getBoolean(SharedPreferencesUtils.LOCK_JUMP_TO_NEXT_TOP_LEVEL_COMMENT_BUTTON, false);
         mSwipeUpToHideFab = mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_UP_TO_HIDE_JUMP_TO_NEXT_TOP_LEVEL_COMMENT_BUTTON, false);
         mExpandChildren = !mSharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_TOP_LEVEL_COMMENTS_FIRST, false);
+        mMarkPostsAsRead = mPostHistorySharedPreferences.getBoolean(mAccountName + SharedPreferencesUtils.MARK_POSTS_AS_READ_BASE, false);
         if (savedInstanceState == null) {
             mRespectSubredditRecommendedSortType = mSharedPreferences.getBoolean(SharedPreferencesUtils.RESPECT_SUBREDDIT_RECOMMENDED_COMMENT_SORT_TYPE, false);
             viewPostDetailFragmentId = System.currentTimeMillis();
@@ -1087,12 +1093,21 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
         }
     }
 
+    private void tryMarkingPostAsRead() {
+        if (mMarkPostsAsRead && !mPost.isRead()) {
+            mPost.markAsRead(true);
+            InsertReadPost.insertReadPost(mRedditDataRoomDatabase, mExecutor, mAccountName, mPost.getId());
+            EventBus.getDefault().post(new PostUpdateEventToPostList(mPost, postListPosition));
+        }
+    }
+
     @Override
     public void onResume() {
         super.onResume();
         if (mRecyclerView != null) {
             mRecyclerView.onWindowVisibilityChanged(View.VISIBLE);
         }
+        tryMarkingPostAsRead();
     }
 
     @Override
@@ -1173,6 +1188,7 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
                         @Override
                         public void onParsePostSuccess(Post post) {
                             mPost = post;
+                            tryMarkingPostAsRead();
 
                             setupMenu();
 
@@ -1758,6 +1774,7 @@ public class ViewPostDetailFragment extends Fragment implements FragmentCommunic
                     @Override
                     public void fetchSuccess(Post post) {
                         mPost = post;
+                        tryMarkingPostAsRead();
                         if (mPostAdapter != null) {
                             mPostAdapter.updatePost(post);
                         }