#2652 (part of): The in-progress podcast at the front of the queue

should remain at the front.

core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java

@@ -328,7 +328,9 @@ public class DBWriter {
                     ItemEnqueuePositionCalculator positionCalculator =
                             new ItemEnqueuePositionCalculator(
                                     new ItemEnqueuePositionCalculator.Options()
-                                            .setEnqueueAtFront(UserPreferences.enqueueAtFront()));
+                                            .setEnqueueAtFront(UserPreferences.enqueueAtFront())
+                                            .setKeepInProgressAtFront(true) // TODO: to expose with preference
+                                            );
 
                     for (int i = 0; i < itemIds.length; i++) {
                         if (!itemListContains(queue, itemIds[i])) {
@@ -401,6 +403,7 @@ public class DBWriter {
 
         public static class Options {
             private boolean enqueueAtFront = false;
+            private boolean keepInProgressAtFront = false;
 
             public boolean isEnqueueAtFront() {
                 return enqueueAtFront;
@@ -410,6 +413,15 @@ public class DBWriter {
                 this.enqueueAtFront = enqueueAtFront;
                 return this;
             }
+
+            public boolean isKeepInProgressAtFront() {
+                return keepInProgressAtFront;
+            }
+
+            public Options setKeepInProgressAtFront(boolean keepInProgressAtFront) {
+                this.keepInProgressAtFront = keepInProgressAtFront;
+                return this;
+            }
         }
 
         private final @NonNull Options options;
@@ -431,9 +443,16 @@ public class DBWriter {
          */
         public int calcPosition(int positionAmongToAdd, FeedItem item, List<FeedItem> curQueue) {
             if (options.isEnqueueAtFront()) {
-                // NOT 0, so that when a list of items are inserted, the items inserted
+                if (options.isKeepInProgressAtFront() &&
+                        curQueue.size() > 0 &&
+                        curQueue.get(0).getMedia() != null &&
+                        curQueue.get(0).getMedia().isInProgress()) {
+                    return positionAmongToAdd + 1; // leave the front in progress item at the front
+                } else { // typical case
+                    // return NOT 0, so that when a list of items are inserted, the items inserted
                     // keep the same order. Returning 0 will reverse the order
                     return positionAmongToAdd;
+                }
             } else {
                 return curQueue.size();
             }

core/src/test/java/de/danoeh/antennapod/core/storage/DBWriterTest.java

@@ -11,6 +11,7 @@ import java.util.Date;
 import java.util.List;
 
 import de.danoeh.antennapod.core.feed.FeedItem;
+import de.danoeh.antennapod.core.feed.FeedMedia;
 import de.danoeh.antennapod.core.feed.FeedMother;
 import de.danoeh.antennapod.core.storage.DBWriter.ItemEnqueuePositionCalculator;
 import de.danoeh.antennapod.core.storage.DBWriter.ItemEnqueuePositionCalculator.Options;
@@ -26,17 +27,50 @@ public class DBWriterTest {
         public static Iterable<Object[]> data() {
             Options optDefault = new Options();
             Options optEnqAtFront = new Options().setEnqueueAtFront(true);
+            Options optKeepInProgressAtFront =
+                    new Options().setEnqueueAtFront(true).setKeepInProgressAtFront(true);
+            // edge case: keep in progress without enabling enqueue at front is meaningless
+            Options optKeepInProgressAtFrontWithNoEnqueueAtFront =
+                    new Options().setKeepInProgressAtFront(true);
+
 
             return Arrays.asList(new Object[][] {
-                    {"case default, i.e., add to the end", QUEUE_DEFAULT.size(), optDefault , 0},
+                    {"case default, i.e., add to the end",
-                    {"case default (2nd item)", QUEUE_DEFAULT.size(), optDefault , 1},
+                            QUEUE_DEFAULT.size(), optDefault , 0, QUEUE_DEFAULT},
-                    {"case option enqueue at front", 0, optEnqAtFront , 0},
+                    {"case default (2nd item)",
-                    {"case option enqueue at front (2nd item)", 1, optEnqAtFront , 1}
+                            QUEUE_DEFAULT.size(), optDefault , 1, QUEUE_DEFAULT},
+                    {"case option enqueue at front",
+                            0, optEnqAtFront , 0, QUEUE_DEFAULT},
+                    {"case option enqueue at front (2nd item)",
+                            1, optEnqAtFront , 1, QUEUE_DEFAULT},
+                    {"case option keep in progress at front",
+                            1, optKeepInProgressAtFront , 0, QUEUE_FRONT_IN_PROGRESS},
+                    {"case option keep in progress at front (2nd item)",
+                            2, optKeepInProgressAtFront , 1, QUEUE_FRONT_IN_PROGRESS},
+                    {"case option keep in progress at front, front item not in progress",
+                            0, optKeepInProgressAtFront , 0, QUEUE_DEFAULT},
+                    {"case option keep in progress at front, front item no media at all",
+                            0, optKeepInProgressAtFront , 0, QUEUE_FRONT_NO_MEDIA}, // No media should not cause any exception
+                    {"case option keep in progress at front, but enqueue at front is disabled",
+                            QUEUE_FRONT_IN_PROGRESS.size(), optKeepInProgressAtFrontWithNoEnqueueAtFront , 0, QUEUE_FRONT_IN_PROGRESS},
+                    {"case empty queue, option default",
+                            0, optDefault, 0, QUEUE_EMPTY},
+                    {"case empty queue, option enqueue at front",
+                            0, optEnqAtFront, 0, QUEUE_EMPTY},
+                    {"case empty queue, option keep in progress at front",
+                            0, optKeepInProgressAtFront, 0, QUEUE_EMPTY},
+
             });
         }
 
+        private static final List<FeedItem> QUEUE_EMPTY = Arrays.asList();
+
         private static final List<FeedItem> QUEUE_DEFAULT = Arrays.asList(tFI(11), tFI(12), tFI(13), tFI(14));
 
+        private static final List<FeedItem> QUEUE_FRONT_IN_PROGRESS = Arrays.asList(tFI(11, 60000), tFI(12), tFI(13));
+
+        private static final List<FeedItem> QUEUE_FRONT_NO_MEDIA = Arrays.asList(tFINoMedia(11), tFI(12), tFI(13));
+
         @Parameter
         public String message;
 
@@ -49,21 +83,39 @@ public class DBWriterTest {
         @Parameter(3)
         public int posAmongAdded; // the position of feed item to be inserted among the list to be inserted.
 
+        @Parameter(4)
+        public List<FeedItem> curQueue;
+
 
         @Test
         public void test() {
             ItemEnqueuePositionCalculator calculator = new ItemEnqueuePositionCalculator(options);
 
-            int posActual = calculator.calcPosition(posAmongAdded, tFI(101), QUEUE_DEFAULT);
+            int posActual = calculator.calcPosition(posAmongAdded, tFI(101), curQueue);
             assertEquals(message, posExpected , posActual);
         }
 
         private static FeedItem tFI(int id) {
+            return tFI(id, -1);
+        }
+
+        private static FeedItem tFI(int id, int position) {
+            FeedItem item = tFINoMedia(id);
+            FeedMedia media = new FeedMedia(item, "download_url", 1234567, "audio/mpeg");
+            item.setMedia(media);
+
+            if (position >= 0) {
+                media.setPosition(position);
+            }
+
+            return item;
+        }
+
+        private static FeedItem tFINoMedia(int id) {
             FeedItem item = new FeedItem(0, "Item" + id, "ItemId" + id, "url",
                     new Date(), FeedItem.PLAYED, FeedMother.anyFeed());
             return item;
         }
-
     }
 
 }