Show status of loading more posts in MorePostsInfoFragment.

3 files changed, 174 insertions, 12 deletions

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
index 79b2961b..e2dfa1d4 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java
@@ -68,6 +68,7 @@ import ml.docilealligator.infinityforreddit.fragments.CommentsListingFragment;
 import ml.docilealligator.infinityforreddit.fragments.FollowedUsersListingFragment;
 import ml.docilealligator.infinityforreddit.fragments.HistoryPostFragment;
 import ml.docilealligator.infinityforreddit.fragments.InboxFragment;
+import ml.docilealligator.infinityforreddit.fragments.MorePostsInfoFragment;
 import ml.docilealligator.infinityforreddit.fragments.MultiRedditListingFragment;
 import ml.docilealligator.infinityforreddit.fragments.PostFragment;
 import ml.docilealligator.infinityforreddit.fragments.SidebarFragment;
@@ -306,4 +307,6 @@ public interface AppComponent {
     void inject(HistoryPostFragment historyPostFragment);
 
     void inject(HistoryActivity historyActivity);
+
+    void inject(MorePostsInfoFragment morePostsInfoFragment);
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
index 3a59798d..44fe148c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
@@ -9,6 +9,7 @@ import android.content.res.ColorStateList;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
+import android.os.Looper;
 import android.view.KeyEvent;
 import android.view.MenuItem;
 import android.view.View;
@@ -72,6 +73,7 @@ import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.events.NeedForPostListFromPostFragmentEvent;
 import ml.docilealligator.infinityforreddit.events.ProvidePostListToViewPostDetailActivityEvent;
 import ml.docilealligator.infinityforreddit.events.SwitchAccountEvent;
+import ml.docilealligator.infinityforreddit.fragments.MorePostsInfoFragment;
 import ml.docilealligator.infinityforreddit.fragments.ViewPostDetailFragment;
 import ml.docilealligator.infinityforreddit.post.HistoryPostPagingSource;
 import ml.docilealligator.infinityforreddit.post.ParsePost;
@@ -373,7 +375,7 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
         viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
             @Override
             public void onPageSelected(int position) {
-                if (posts != null && position > posts.size() - 5) {
+                if (posts != null && position > posts.size() - 2) {
                     fetchMorePosts();
                 }
             }
@@ -516,7 +518,7 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
         isFetchingMorePosts = true;
         fetchMorePostsFailed = false;
 
-        Handler handler = new Handler();
+        Handler handler = new Handler(Looper.getMainLooper());
 
         if (postType != HistoryPostPagingSource.TYPE_READ_POSTS) {
             mExecutor.execute(() -> {
@@ -639,27 +641,53 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
                         String responseString = response.body();
                         LinkedHashSet<Post> newPosts = ParsePost.parsePostsSync(responseString, -1, postFilter, readPostList);
                         if (newPosts == null) {
-                            noMorePosts = true;
+                            handler.post(() -> {
+                                noMorePosts = true;
+                                MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                                if (fragment != null) {
+                                    fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                                }
+                            });
                         } else {
                             LinkedHashSet<Post> postLinkedHashSet = new LinkedHashSet<>(posts);
                             int currentPostsSize = postLinkedHashSet.size();
                             postLinkedHashSet.addAll(newPosts);
                             if (currentPostsSize == postLinkedHashSet.size()) {
-                                noMorePosts = true;
+                                handler.post(() -> {
+                                    noMorePosts = true;
+                                    MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                                    if (fragment != null) {
+                                        fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                                    }
+                                });
                             } else {
                                 posts = new ArrayList<>(postLinkedHashSet);
                                 handler.post(() -> sectionsPagerAdapter.notifyItemRangeInserted(currentPostsSize, postLinkedHashSet.size() - currentPostsSize));
                             }
                         }
                     } else {
-                        fetchMorePostsFailed = true;
+                        handler.post(() -> {
+                            fetchMorePostsFailed = true;
+                            MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                            if (fragment != null) {
+                                fragment.setStatus(MorePostsInfoFragment.Status.FAILED);
+                            }
+                        });
                     }
                 } catch (IOException e) {
                     e.printStackTrace();
-                    fetchMorePostsFailed = true;
+                    handler.post(() -> {
+                        fetchMorePostsFailed = true;
+                        MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                        if (fragment != null) {
+                            fragment.setStatus(MorePostsInfoFragment.Status.FAILED);
+                        }
+                    });
                 }
 
-                isFetchingMorePosts = false;
+                handler.post(() -> {
+                    isFetchingMorePosts = false;
+                });
             });
         } else {
             mExecutor.execute((Runnable) () -> {
@@ -686,25 +714,53 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
                         String responseString = response.body();
                         LinkedHashSet<Post> newPosts = ParsePost.parsePostsSync(responseString, -1, postFilter, null);
                         if (newPosts == null || newPosts.isEmpty()) {
-                            noMorePosts = true;
+                            handler.post(() -> {
+                                noMorePosts = true;
+                                MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                                if (fragment != null) {
+                                    fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                                }
+                            });
                         } else {
                             LinkedHashSet<Post> postLinkedHashSet = new LinkedHashSet<>(posts);
                             int currentPostsSize = postLinkedHashSet.size();
                             postLinkedHashSet.addAll(newPosts);
                             if (currentPostsSize == postLinkedHashSet.size()) {
-                                noMorePosts = true;
+                                handler.post(() -> {
+                                    noMorePosts = true;
+                                    MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                                    if (fragment != null) {
+                                        fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                                    }
+                                });
                             } else {
                                 posts = new ArrayList<>(postLinkedHashSet);
                                 handler.post(() -> sectionsPagerAdapter.notifyItemRangeInserted(currentPostsSize, postLinkedHashSet.size() - currentPostsSize));
                             }
                         }
                     } else {
-                        fetchMorePostsFailed = true;
+                        handler.post(() -> {
+                            fetchMorePostsFailed = true;
+                            MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                            if (fragment != null) {
+                                fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                            }
+                        });
                     }
                 } catch (IOException e) {
                     e.printStackTrace();
-                    fetchMorePostsFailed = true;
+                    handler.post(() -> {
+                        fetchMorePostsFailed = true;
+                        MorePostsInfoFragment fragment = sectionsPagerAdapter.getMorePostsInfoFragment();
+                        if (fragment != null) {
+                            fragment.setStatus(MorePostsInfoFragment.Status.NO_MORE_POSTS);
+                        }
+                    });
                 }
+
+                handler.post(() -> {
+                    isFetchingMorePosts = false;
+                });
             });
         }
     }
@@ -877,6 +933,13 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
                     bundle.putString(ViewPostDetailFragment.EXTRA_CONTEXT_NUMBER, getIntent().getStringExtra(EXTRA_CONTEXT_NUMBER));
                     bundle.putString(ViewPostDetailFragment.EXTRA_MESSAGE_FULLNAME, getIntent().getStringExtra(EXTRA_MESSAGE_FULLNAME));
                 } else {
+                    if (position >= posts.size()) {
+                        MorePostsInfoFragment morePostsInfoFragment = new MorePostsInfoFragment();
+                        Bundle moreBundle = new Bundle();
+                        moreBundle.putInt(MorePostsInfoFragment.EXTRA_STATUS, MorePostsInfoFragment.Status.LOADING);
+                        morePostsInfoFragment.setArguments(moreBundle);
+                        return morePostsInfoFragment;
+                    }
                     bundle.putParcelable(ViewPostDetailFragment.EXTRA_POST_DATA, posts.get(position));
                     bundle.putInt(ViewPostDetailFragment.EXTRA_POST_LIST_POSITION, position);
                 }
@@ -897,7 +960,7 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
 
         @Override
         public int getItemCount() {
-            return posts == null ? 1 : posts.size();
+            return posts == null ? 1 : posts.size() + 1;
         }
 
         @Nullable
@@ -911,5 +974,17 @@ public class ViewPostDetailActivity extends BaseActivity implements SortTypeSele
             }
             return null;
         }
+
+        @Nullable
+        MorePostsInfoFragment getMorePostsInfoFragment() {
+            if (posts == null || fragmentManager == null) {
+                return null;
+            }
+            Fragment fragment = fragmentManager.findFragmentByTag("f" + posts.size());
+            if (fragment instanceof MorePostsInfoFragment) {
+                return (MorePostsInfoFragment) fragment;
+            }
+            return null;
+        }
     }
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/MorePostsInfoFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/MorePostsInfoFragment.java
new file mode 100644
index 00000000..499c30ff
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/MorePostsInfoFragment.java
@@ -0,0 +1,84 @@
+package ml.docilealligator.infinityforreddit.fragments;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.IntDef;
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.inject.Inject;
+
+import ml.docilealligator.infinityforreddit.Infinity;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.activities.BaseActivity;
+import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
+import ml.docilealligator.infinityforreddit.databinding.FragmentMorePostsInfoBinding;
+
+public class MorePostsInfoFragment extends Fragment {
+
+    public static final String EXTRA_STATUS = "ES";
+
+    @Inject
+    CustomThemeWrapper mCustomThemeWrapper;
+    private FragmentMorePostsInfoBinding binding;
+    private BaseActivity mActivity;
+    @Status
+    int status;
+
+    public MorePostsInfoFragment() {
+        // Required empty public constructor
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        ((Infinity) mActivity.getApplication()).getAppComponent().inject(this);
+
+        binding = FragmentMorePostsInfoBinding.inflate(inflater, container, false);
+
+        applyTheme();
+
+        setStatus(getArguments().getInt(EXTRA_STATUS, Status.LOADING));
+
+        return binding.getRoot();
+    }
+
+    public void setStatus(@Status int status) {
+        this.status = status;
+        switch (status) {
+            case Status.LOADING:
+                binding.infoTextViewMorePostsInfoFragment.setText(R.string.loading);
+                break;
+            case Status.FAILED:
+                binding.infoTextViewMorePostsInfoFragment.setText(R.string.load_more_posts_failed);
+                break;
+            case Status.NO_MORE_POSTS:
+                binding.infoTextViewMorePostsInfoFragment.setText(R.string.no_more_posts);
+        }
+    }
+
+    private void applyTheme() {
+        binding.infoTextViewMorePostsInfoFragment.setTextColor(mCustomThemeWrapper.getPrimaryTextColor());
+    }
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        mActivity = (BaseActivity) context;
+    }
+
+    @IntDef({Status.LOADING, Status.FAILED, Status.NO_MORE_POSTS})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface Status {
+        int LOADING = 0;
+        int FAILED = 1;
+        int NO_MORE_POSTS = 2;
+    }
+}
\ No newline at end of file