Added itemIdentifier attribute

src/de/danoeh/antennapod/feed/FeedItem.java

@@ -11,6 +11,8 @@ import java.util.Date;
  */
 public class FeedItem extends FeedComponent {
 
+	/** The id/guid that can be found in the rss/atom feed. Might not be set.*/
+	private String itemIdentifier;
 	private String title;
 	private String description;
 	private String contentEncoded;
@@ -58,6 +60,21 @@ public class FeedItem extends FeedComponent {
 	public SimpleChapter getCurrentChapter() {
 		return getCurrentChapter(media.getPosition());
 	}
+	
+	/** Returns the value that uniquely identifies this FeedItem. 
+	 *  If the itemIdentifier attribute is not null, it will be returned.
+	 *  Else it will try to return the link. If the link is not given, it will
+	 *  use the title of the entry.
+	 * */
+	public String getIdentifyingValue() {
+		if (itemIdentifier != null) {
+			return itemIdentifier;
+		} else if (link != null) {
+			return link;
+		} else {
+			return title;
+		}
+	}
 
 	public String getTitle() {
 		return title;
@@ -135,4 +152,13 @@ public class FeedItem extends FeedComponent {
 		this.simpleChapters = simpleChapters;
 	}
 
+	public String getItemIdentifier() {
+		return itemIdentifier;
+	}
+
+	public void setItemIdentifier(String itemIdentifier) {
+		this.itemIdentifier = itemIdentifier;
+	}
+	
+
 }

src/de/danoeh/antennapod/feed/FeedManager.java

@@ -654,6 +654,8 @@ public class FeedManager {
 				}
 				item.read = (itemlistCursor.getInt(PodDBAdapter.KEY_READ_INDEX) > 0) ? true
 						: false;
+				item.setItemIdentifier(itemlistCursor
+						.getString(PodDBAdapter.KEY_ITEM_IDENTIFIER_INDEX));
 				if (!item.read) {
 					unreadItems.add(item);
 				}
@@ -675,7 +677,8 @@ public class FeedManager {
 											.getString(PodDBAdapter.KEY_TITLE_INDEX),
 									chapterCursor
 											.getString(PodDBAdapter.KEY_SC_LINK_INDEX));
-							chapter.setId(chapterCursor.getLong(PodDBAdapter.KEY_ID_INDEX));
+							chapter.setId(chapterCursor
+									.getLong(PodDBAdapter.KEY_ID_INDEX));
 							item.getSimpleChapters().add(chapter);
 						} while (chapterCursor.moveToNext());
 					}

src/de/danoeh/antennapod/storage/PodDBAdapter.java

@@ -25,7 +25,7 @@ import android.util.Log;
  * */
 public class PodDBAdapter {
 	private static final String TAG = "PodDBAdapter";
-	private static final int DATABASE_VERSION = 3;
+	private static final int DATABASE_VERSION = 4;
 	private static final String DATABASE_NAME = "Antennapod.db";
 
 	
@@ -52,6 +52,7 @@ public class PodDBAdapter {
 	public static final int KEY_MEDIA_INDEX = 8;
 	public static final int KEY_FEED_INDEX = 9;
 	public static final int KEY_HAS_SIMPLECHAPTERS_INDEX = 10;
+	public static final int KEY_ITEM_IDENTIFIER_INDEX = 11;
 	// ---------- FeedMedia indices
 	public static final int KEY_DURATION_INDEX = 1;
 	public static final int KEY_POSITION_INDEX = 5;
@@ -104,6 +105,7 @@ public class PodDBAdapter {
 	public static final String KEY_AUTHOR = "author";
 	public static final String KEY_HAS_SIMPLECHAPTERS = "has_simple_chapters";
 	public static final String KEY_TYPE = "type";
+	public static final String KEY_ITEM_IDENTIFIER = "item_identifier";
 
 	// Table names
 	public static final String TABLE_NAME_FEEDS = "Feeds";
@@ -145,7 +147,8 @@ public class PodDBAdapter {
 			KEY_PAYMENT_LINK + " TEXT," + 
 			KEY_MEDIA + " INTEGER," + 
 			KEY_FEED + " INTEGER," + 
-			KEY_HAS_SIMPLECHAPTERS + " INTEGER)";
+			KEY_HAS_SIMPLECHAPTERS + " INTEGER," +
+			KEY_ITEM_IDENTIFIER + " TEXT)";
 
 	private static final String CREATE_TABLE_FEED_IMAGES = "CREATE TABLE "
 			+ TABLE_NAME_FEED_IMAGES + " (" + TABLE_PRIMARY_KEY + 
@@ -346,6 +349,7 @@ public class PodDBAdapter {
 		values.put(KEY_FEED, item.getFeed().getId());
 		values.put(KEY_READ, item.isRead());
 		values.put(KEY_HAS_SIMPLECHAPTERS, item.getSimpleChapters() != null);
+		values.put(KEY_ITEM_IDENTIFIER, item.getItemIdentifier());
 		if (item.getId() == 0) {
 			item.setId(db.insert(TABLE_NAME_FEED_ITEMS, null, values));
 		} else {
@@ -642,6 +646,10 @@ public class PodDBAdapter {
 				db.execSQL("ALTER TABLE " + TABLE_NAME_SIMPLECHAPTERS + " ADD COLUMN " + 
 						KEY_LINK + " TEXT");
 			}
+			if (oldVersion <= 3) {
+				db.execSQL("ALTER TABLE " + TABLE_NAME_FEED_ITEMS + " ADD COLUMN " + 
+						KEY_ITEM_IDENTIFIER + " TEXT");
+			}
 		}
 	}