Sort in Podcast screen - UI

app/src/main/java/de/danoeh/antennapod/dialog/IntraFeedSortDialog.java

@@ -0,0 +1,51 @@
+package de.danoeh.antennapod.dialog;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AlertDialog;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.feed.IntraFeedSortOrder;
+
+public abstract class IntraFeedSortDialog {
+
+    @Nullable
+    protected IntraFeedSortOrder currentSortOrder;
+    @NonNull
+    protected Context context;
+
+    public IntraFeedSortDialog(@NonNull Context context, @Nullable IntraFeedSortOrder sortOrder) {
+        this.context = context;
+        this.currentSortOrder = sortOrder;
+    }
+
+    public void openDialog() {
+        final String[] items = context.getResources().getStringArray(R.array.feed_episodes_sort_options);
+        final String[] valueStrs = context.getResources().getStringArray(R.array.feed_episodes_sort_values);
+        final IntraFeedSortOrder[] values = new IntraFeedSortOrder[valueStrs.length];
+        for (int i = 0; i < valueStrs.length; i++) {
+            values[i] = IntraFeedSortOrder.valueOf(valueStrs[i]);
+        }
+
+        int idxCurrentSort = -1;
+        for  (int i = 0; i < values.length; i++) {
+            if (currentSortOrder == values[i]) {
+                idxCurrentSort = i;
+                break;
+            }
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle(R.string.sort);
+        builder.setSingleChoiceItems(items, idxCurrentSort, (dialog, idxNewSort) -> {
+            updateSort(values[idxNewSort]);
+            dialog.dismiss();
+        });
+        builder.setNegativeButton(R.string.cancel_label, null);
+        builder.create().show();
+    }
+
+    protected abstract void updateSort(@NonNull IntraFeedSortOrder sortOrder);
+}

app/src/main/java/de/danoeh/antennapod/fragment/FeedItemlistFragment.java

@@ -5,10 +5,6 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.graphics.LightingColorFilter;
 import android.os.Bundle;
-import androidx.annotation.NonNull;
-import androidx.fragment.app.ListFragment;
-import androidx.core.view.MenuItemCompat;
-import androidx.appcompat.widget.SearchView;
 import android.util.Log;
 import android.view.ContextMenu;
 import android.view.LayoutInflater;
@@ -23,12 +19,16 @@ import android.widget.ListView;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.SearchView;
+import androidx.core.view.MenuItemCompat;
+import androidx.fragment.app.ListFragment;
+
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 import com.joanzapata.iconify.Iconify;
 import com.joanzapata.iconify.widget.IconTextView;
 
-import de.danoeh.antennapod.core.event.PlaybackPositionEvent;
 import org.apache.commons.lang3.Validate;
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -45,6 +45,7 @@ import de.danoeh.antennapod.core.dialog.DownloadRequestErrorDialogCreator;
 import de.danoeh.antennapod.core.event.DownloadEvent;
 import de.danoeh.antennapod.core.event.DownloaderUpdate;
 import de.danoeh.antennapod.core.event.FeedItemEvent;
+import de.danoeh.antennapod.core.event.PlaybackPositionEvent;
 import de.danoeh.antennapod.core.feed.EventDistributor;
 import de.danoeh.antennapod.core.feed.Feed;
 import de.danoeh.antennapod.core.feed.FeedEvent;
@@ -192,6 +193,7 @@ public class FeedItemlistFragment extends ListFragment {
         searchItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
              @Override
              public boolean onMenuItemActionExpand(MenuItem item) {
+                 menu.findItem(R.id.sort_items).setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
                  menu.findItem(R.id.filter_items).setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
                  menu.findItem(R.id.episode_actions).setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
                  menu.findItem(R.id.refresh_item).setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
@@ -623,6 +625,7 @@ public class FeedItemlistFragment extends ListFragment {
 
     @NonNull
     private Optional<Feed> loadData() {
+        // TODO-2524: apply sorting, either at db level or here
         Feed feed = DBReader.getFeed(feedID);
         if (feed != null && feed.getItemFilter() != null) {
             DBReader.loadAdditionalFeedItemListData(feed.getItems());

app/src/main/java/de/danoeh/antennapod/menuhandler/FeedMenuHandler.java

@@ -7,6 +7,8 @@ import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 
+import androidx.annotation.NonNull;
+
 import org.apache.commons.lang3.StringUtils;
 
 import java.util.Set;
@@ -14,12 +16,14 @@ import java.util.Set;
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.core.dialog.ConfirmationDialog;
 import de.danoeh.antennapod.core.feed.Feed;
+import de.danoeh.antennapod.core.feed.IntraFeedSortOrder;
 import de.danoeh.antennapod.core.storage.DBTasks;
 import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.storage.DownloadRequestException;
 import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.ShareUtils;
 import de.danoeh.antennapod.dialog.FilterDialog;
+import de.danoeh.antennapod.dialog.IntraFeedSortDialog;
 
 /**
  * Handles interactions with the FeedItemMenu.
@@ -65,6 +69,9 @@ public class FeedMenuHandler {
             case R.id.refresh_complete_item:
                 DBTasks.forceRefreshCompleteFeed(context, selectedFeed);
                 break;
+            case R.id.sort_items:
+                showSortDialog(context, selectedFeed);
+                break;
             case R.id.filter_items:
                 showFilterDialog(context, selectedFeed);
                 break;
@@ -108,4 +115,17 @@ public class FeedMenuHandler {
 
         filterDialog.openDialog();
     }
+
+
+    private static void showSortDialog(Context context, Feed selectedFeed) {
+        IntraFeedSortDialog sortDialog = new IntraFeedSortDialog(context, selectedFeed.getSortOrder()) {
+            @Override
+            protected void updateSort(@NonNull IntraFeedSortOrder sortOrder) {
+                selectedFeed.setSortOrder(sortOrder);
+                // TODO-2524: update in db
+            }
+        };
+        sortDialog.openDialog();
+    }
+
 }

app/src/main/res/menu/feedlist.xml

@@ -2,6 +2,13 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:custom="http://schemas.android.com/apk/res-auto">
 
+    <item
+        android:id="@+id/sort_items"
+        android:icon="?attr/ic_sort"
+        android:menuCategory="container"
+        android:title="@string/sort"
+        custom:showAsAction="always">
+    </item>
     <item
         android:id="@+id/filter_items"
         android:icon="?attr/ic_filter"

core/src/main/java/de/danoeh/antennapod/core/feed/Feed.java

@@ -1,9 +1,10 @@
 package de.danoeh.antennapod.core.feed;
 
 import android.database.Cursor;
-import androidx.annotation.Nullable;
 import android.text.TextUtils;
 
+import androidx.annotation.Nullable;
+
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
@@ -87,6 +88,8 @@ public class Feed extends FeedFile implements ImageResource {
      * Contains property strings. If such a property applies to a feed item, it is not shown in the feed list
      */
     private FeedItemFilter itemfilter;
+    @Nullable
+    private IntraFeedSortOrder sortOrder;
 
     /**
      * This constructor is used for restoring a feed from the database.
@@ -523,6 +526,15 @@ public class Feed extends FeedFile implements ImageResource {
         }
     }
 
+    @Nullable
+    public IntraFeedSortOrder getSortOrder() {
+        return sortOrder;
+    }
+
+    public void setSortOrder(@Nullable IntraFeedSortOrder sortOrder) {
+        this.sortOrder = sortOrder;
+    }
+
     public boolean hasLastUpdateFailed() {
         return this.lastUpdateFailed;
     }

core/src/main/java/de/danoeh/antennapod/core/feed/IntraFeedSortOrder.java

@@ -0,0 +1,31 @@
+package de.danoeh.antennapod.core.feed;
+
+/**
+ * Provides sort orders to sort a list of episodes within a feed.
+ */
+public enum IntraFeedSortOrder {
+    DATE_OLD_NEW(1),
+    DATE_NEW_OLD(2),
+    EPISODE_TITLE_A_Z(3),
+    EPISODE_TITLE_Z_A(4),
+    DURATION_SHORT_LONG(5),
+    DURATION_LONG_SHORT(6);
+
+    public final int code;
+
+    IntraFeedSortOrder(int code) {
+        this.code = code;
+    }
+
+    /**
+     * Converts the string representation to its enum value. If the string value is unknown,
+     * the given default value is returned.
+     */
+    public static IntraFeedSortOrder parseWithDefault(String value, IntraFeedSortOrder defaultValue) {
+        try {
+            return valueOf(value);
+        } catch (IllegalArgumentException e) {
+            return defaultValue;
+        }
+    }
+}

core/src/main/res/values/arrays.xml

@@ -254,6 +254,25 @@
         <item>is_favorite</item>
     </string-array>
 
+    <!-- sort for podcast screen, not for queue -->
+    <string-array name="feed_episodes_sort_options">
+        <item>@string/sort_date_new_old</item>
+        <item>@string/sort_date_old_new</item>
+        <item>@string/sort_title_a_z</item>
+        <item>@string/sort_title_z_a</item>
+        <item>@string/sort_duration_short_long</item>
+        <item>@string/sort_duration_long_short</item>
+    </string-array>
+
+    <string-array name="feed_episodes_sort_values">
+        <item>DATE_NEW_OLD</item>
+        <item>DATE_OLD_NEW</item>
+        <item>EPISODE_TITLE_A_Z</item>
+        <item>EPISODE_TITLE_Z_A</item>
+        <item>DURATION_SHORT_LONG</item>
+        <item>DURATION_LONG_SHORT</item>
+    </string-array>
+
     <string-array name="image_cache_size_options">
         <item>20 MiB</item>
         <item>50 MiB</item>