Better handling of filter expiration date (#212)

* Better handling of filter expiration date
* Simplify Thread and Home Timeline filtering

mastodon/src/main/java/org/joinmastodon/android/fragments/HomeTimelineFragment.java

@@ -19,9 +19,11 @@ import android.widget.Button;
 import android.widget.FrameLayout;
 import android.widget.ImageButton;
 import android.widget.ImageView;
-import android.widget.TextView;
 import android.widget.Toolbar;
 
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.squareup.otto.Subscribe;
 
 import org.joinmastodon.android.E;
@@ -43,12 +45,9 @@ import org.joinmastodon.android.utils.StatusFilterPredicate;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
-import java.util.Locale;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
 import me.grishka.appkit.Nav;
 import me.grishka.appkit.api.Callback;
 import me.grishka.appkit.api.ErrorResponse;
@@ -266,19 +265,15 @@ public class HomeTimelineFragment extends StatusListFragment{
 							List<StatusDisplayItem> targetList=displayItems.subList(gapPos, gapPos+1);
 							targetList.clear();
 							List<Status> insertedPosts=data.subList(gapPostIndex+1, gapPostIndex+1);
-							List<Filter> filters=AccountSessionManager.getInstance().getAccount(accountID).wordFilters.stream().filter(f->f.context.contains(Filter.FilterContext.HOME)).collect(Collectors.toList());
-							outer:
+							StatusFilterPredicate filterPredicate=new StatusFilterPredicate(accountID, Filter.FilterContext.HOME);
 							for(Status s:result){
 								if(idsBelowGap.contains(s.id))
 									break;
-								for(Filter filter:filters){
-									if(filter.matches(s)){
-										continue outer;
-									}
-								}
+								if(filterPredicate.test(s)){
 									targetList.addAll(buildDisplayItems(s));
 									insertedPosts.add(s);
 								}
+							}
 							if(targetList.isEmpty()){
 								// oops. We didn't add new posts, but at least we know there are none.
 								adapter.notifyItemRemoved(getMainAdapterOffset()+gapPos);

mastodon/src/main/java/org/joinmastodon/android/fragments/ThreadFragment.java

@@ -5,7 +5,6 @@ import android.view.View;
 
 import org.joinmastodon.android.R;
 import org.joinmastodon.android.api.requests.statuses.GetStatusContext;
-import org.joinmastodon.android.api.session.AccountSessionManager;
 import org.joinmastodon.android.events.StatusCreatedEvent;
 import org.joinmastodon.android.model.Account;
 import org.joinmastodon.android.model.Filter;
@@ -17,6 +16,7 @@ import org.joinmastodon.android.ui.displayitems.StatusDisplayItem;
 import org.joinmastodon.android.ui.displayitems.TextStatusDisplayItem;
 import org.joinmastodon.android.ui.text.HtmlParser;
 import org.joinmastodon.android.ui.utils.UiUtils;
+import org.joinmastodon.android.utils.StatusFilterPredicate;
 import org.parceler.Parcels;
 
 import java.util.Collections;
@@ -92,16 +92,10 @@ public class ThreadFragment extends StatusListFragment{
 	}
 
 	private List<Status> filterStatuses(List<Status> statuses){
-		List<Filter> filters=AccountSessionManager.getInstance().getAccount(accountID).wordFilters.stream().filter(f->f.context.contains(Filter.FilterContext.THREAD)).collect(Collectors.toList());
-		if(filters.isEmpty())
-			return statuses;
-		return statuses.stream().filter(status->{
-			for(Filter filter:filters){
-				if(filter.matches(status))
-					return false;
-			}
-			return true;
-		}).collect(Collectors.toList());
+		StatusFilterPredicate statusFilterPredicate=new StatusFilterPredicate(accountID,Filter.FilterContext.THREAD);
+		return statuses.stream()
+				.filter(statusFilterPredicate)
+				.collect(Collectors.toList());
 	}
 
 	@Override

mastodon/src/main/java/org/joinmastodon/android/model/Filter.java

@@ -6,12 +6,14 @@ import com.google.gson.annotations.SerializedName;
 
 import org.joinmastodon.android.api.ObjectValidationException;
 import org.joinmastodon.android.api.RequiredField;
+import org.parceler.Parcel;
 
 import java.time.Instant;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.regex.Pattern;
 
+@Parcel
 public class Filter extends BaseModel{
 	@RequiredField
 	public String id;
@@ -21,6 +23,7 @@ public class Filter extends BaseModel{
 	public Instant expiresAt;
 	public boolean irreversible;
 	public boolean wholeWord;
+	public FilterAction filterAction;
 
 	@SerializedName("context")
 	private List<FilterContext> _context;
@@ -76,4 +79,11 @@ public class Filter extends BaseModel{
 		@SerializedName("thread")
 		THREAD
 	}
+
+	public enum FilterAction{
+		@SerializedName("hide")
+		HIDE,
+		@SerializedName("warn")
+		WARN
+	}
 }

mastodon/src/main/java/org/joinmastodon/android/utils/StatusFilterPredicate.java

@@ -4,6 +4,7 @@ import org.joinmastodon.android.api.session.AccountSessionManager;
 import org.joinmastodon.android.model.Filter;
 import org.joinmastodon.android.model.Status;
 
+import java.time.Instant;
 import java.util.List;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
@@ -21,6 +22,16 @@ public class StatusFilterPredicate implements Predicate<Status>{
 
 	@Override
 	public boolean test(Status status){
+		if(status.filtered!=null){
+			if (status.filtered.isEmpty()){
+				return true;
+			}
+			boolean matches=status.filtered.stream()
+					.map(filterResult->filterResult.filter)
+					.filter(filter->filter.expiresAt==null||filter.expiresAt.isAfter(Instant.now()))
+					.anyMatch(filter->filter.filterAction==Filter.FilterAction.HIDE);
+			return !matches;
+		}
 		for(Filter filter:filters){
 			if(filter.matches(status))
 				return false;