resolved compile time issues. refactored some code

7 files changed, 56 insertions, 26 deletions

diff --git a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
index 1474180e2..1d5bd5031 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
@@ -492,7 +492,7 @@ public class UserPreferences {
     }
 
 
-    public static EpisodeCleanupAlgorithm<Integer> getEpisodeCleanupAlgorithm() {
+    public static EpisodeCleanupAlgorithm getEpisodeCleanupAlgorithm() {
         int cleanupValue = prefs.getInt(PREF_EPISODE_CLEANUP, -1);
         if (cleanupValue == -1) {
             return new APQueueCleanupAlgorithm();
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/APCleanupAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/APCleanupAlgorithm.java
index e28c902dd..ef834921a 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/APCleanupAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/APCleanupAlgorithm.java
@@ -18,7 +18,7 @@ import de.danoeh.antennapod.core.util.LongList;
 /**
  * Implementation of the EpisodeCleanupAlgorithm interface used by AntennaPod.
  */
-public class APCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer> {
+public class APCleanupAlgorithm extends EpisodeCleanupAlgorithm {
 
     private static final String TAG = "APCleanupAlgorithm";
     /** the number of days after playback to wait before an item is eligible to be cleaned up */
@@ -29,7 +29,7 @@ public class APCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer> {
     }
 
     @Override
-    public int performCleanup(Context context, Integer numberOfEpisodesToDelete) {
+    public int performCleanup(Context context, int numberOfEpisodesToDelete) {
         List<FeedItem> candidates = new ArrayList<>();
         List<FeedItem> downloadedItems = DBReader.getDownloadedItems();
         LongList queue = DBReader.getQueueIDList();
@@ -89,7 +89,7 @@ public class APCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer> {
     }
 
     @Override
-    public Integer getDefaultCleanupParameter() {
+    public int getDefaultCleanupParameter() {
         return 0;
     }
 }
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
index efc742be2..9e21a55f2 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
@@ -70,8 +70,8 @@ public class APDownloadAlgorithm implements AutomaticDownloadAlgorithm {
 
                     int autoDownloadableEpisodes = candidates.size();
                     int downloadedEpisodes = DBReader.getNumberOfDownloadedEpisodes();
-                    int deletedEpisodes = UserPreferences.getEpisodeCleanupAlgorithm().performCleanup(context,
-                            getPerformAutoCleanupArgs(autoDownloadableEpisodes));
+                    int deletedEpisodes = UserPreferences.getEpisodeCleanupAlgorithm()
+                            .makeRoomForEpisodes(context, autoDownloadableEpisodes);
                     boolean cacheIsUnlimited = UserPreferences.getEpisodeCacheSize() == UserPreferences
                             .getEpisodeCacheSizeUnlimited();
                     int episodeCacheSize = UserPreferences.getEpisodeCacheSize();
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/APNullCleanupAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/APNullCleanupAlgorithm.java
index b17f9fdee..132b61853 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/APNullCleanupAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/APNullCleanupAlgorithm.java
@@ -6,19 +6,19 @@ import android.util.Log;
 /**
  * A cleanup algorithm that never removes anything
  */
-public class APNullCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer> {
+public class APNullCleanupAlgorithm extends EpisodeCleanupAlgorithm {
 
     private static final String TAG = "APNullCleanupAlgorithm";
 
     @Override
-    public int performCleanup(Context context, Integer parameter) {
+    public int performCleanup(Context context, int parameter) {
         // never clean anything up
         Log.i(TAG, "performCleanup: Not removing anything");
         return 0;
     }
 
     @Override
-    public Integer getDefaultCleanupParameter() {
+    public int getDefaultCleanupParameter() {
         return 0;
     }
 }
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/APQueueCleanupAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/APQueueCleanupAlgorithm.java
index 18dd46c7a..ebf8ca4cf 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/APQueueCleanupAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/APQueueCleanupAlgorithm.java
@@ -18,12 +18,12 @@ import de.danoeh.antennapod.core.util.LongList;
  * A cleanup algorithm that removes any item that isn't in the queue and isn't a favorite
  * but only if space is needed.
  */
-public class APQueueCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer> {
+public class APQueueCleanupAlgorithm extends EpisodeCleanupAlgorithm {
 
     private static final String TAG = "APQueueCleanupAlgorithm";
 
     @Override
-    public int performCleanup(Context context, Integer numberOfEpisodesToDelete) {
+    public int performCleanup(Context context, int numberOfEpisodesToDelete) {
         List<FeedItem> candidates = new ArrayList<>();
         List<FeedItem> downloadedItems = DBReader.getDownloadedItems();
         LongList queue = DBReader.getQueueIDList();
@@ -73,7 +73,7 @@ public class APQueueCleanupAlgorithm implements EpisodeCleanupAlgorithm<Integer>
     }
 
     @Override
-    public Integer getDefaultCleanupParameter() {
+    public int getDefaultCleanupParameter() {
         return 0;
     }
 }
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
index 2fc7e52bd..f54e13471 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
@@ -332,9 +332,7 @@ public final class DBTasks {
                 @Override
                 public void run() {
                     ClientConfig.dbTasksCallbacks.getEpisodeCacheCleanupAlgorithm()
-                            .performCleanup(context,
-                                    ClientConfig.dbTasksCallbacks.getEpisodeCacheCleanupAlgorithm()
-                                            .getPerformCleanupParameter(items.length));
+                            .makeRoomForEpisodes(context, items.length);
                 }
 
             }.start();
@@ -390,8 +388,7 @@ public final class DBTasks {
      * @param context Used for accessing the DB.
      */
     public static void performAutoCleanup(final Context context) {
-        ClientConfig.dbTasksCallbacks.getEpisodeCacheCleanupAlgorithm().performCleanup(context,
-                ClientConfig.dbTasksCallbacks.getEpisodeCacheCleanupAlgorithm().getDefaultCleanupParameter());
+        ClientConfig.dbTasksCallbacks.getEpisodeCacheCleanupAlgorithm().performCleanup(context);
     }
 
     /**
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/EpisodeCleanupAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/EpisodeCleanupAlgorithm.java
index 484263f97..0f402745c 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/EpisodeCleanupAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/EpisodeCleanupAlgorithm.java
@@ -2,27 +2,60 @@ package de.danoeh.antennapod.core.storage;
 
 import android.content.Context;
 
-import java.util.List;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
 
-import de.danoeh.antennapod.core.feed.FeedItem;
-
-public interface EpisodeCleanupAlgorithm<T> {
+public abstract class EpisodeCleanupAlgorithm {
 
     /**
      * Deletes downloaded episodes that are no longer needed. What episodes are deleted and how many
      * of them depends on the implementation.
      *
-     * @param context   Can be used for accessing the database
-     * @param parameter An additional parameter. This parameter is either returned by getDefaultCleanupParameter
-     *                  or getPerformCleanupParameter.
+     * @param context     Can be used for accessing the database
+     * @param numToRemove An additional parameter. This parameter is either returned by getDefaultCleanupParameter
+     *                    or getPerformCleanupParameter.
      * @return The number of episodes that were deleted.
      */
-    int performCleanup(Context context, T parameter);
+    public abstract int performCleanup(Context context, int numToRemove);
+
+    public int performCleanup(Context context) {
+        return performCleanup(context, getDefaultCleanupParameter());
+    }
 
     /**
      * Returns a parameter for performCleanup. The implementation of this interface should decide how much
      * space to free to satisfy the episode cache conditions. If the conditions are already satisfied, this
      * method should not have any effects.
      */
-    T getDefaultCleanupParameter();
+    public abstract int getDefaultCleanupParameter();
+
+    /**
+     * Cleans up just enough episodes to make room for the requested number
+     *
+     * @param context            Can be used for accessing the database
+     * @param amountOfRoomNeeded the number of episodes we need space for
+     * @return The number of epiosdes that were deleted
+     */
+    public int makeRoomForEpisodes(Context context, int amountOfRoomNeeded) {
+        return performCleanup(context, getNumEpisodesToCleanup(amountOfRoomNeeded));
+    }
+
+    /**
+     * @param amountOfRoomNeeded the number of episodes we want to download
+     * @return the number of episodes to delete in order to make room
+     */
+    protected int getNumEpisodesToCleanup(final int amountOfRoomNeeded) {
+        if (amountOfRoomNeeded >= 0
+                && UserPreferences.getEpisodeCacheSize() != UserPreferences
+                .getEpisodeCacheSizeUnlimited()) {
+            int downloadedEpisodes = DBReader
+                    .getNumberOfDownloadedEpisodes();
+            if (downloadedEpisodes + amountOfRoomNeeded >= UserPreferences
+                    .getEpisodeCacheSize()) {
+
+                return downloadedEpisodes + amountOfRoomNeeded
+                        - UserPreferences.getEpisodeCacheSize();
+            }
+        }
+        return 0;
+    }
 }