major classes refactoring

src/main/java/com/commafeed/backend/services/FeedUpdateService.java

@@ -0,0 +1,89 @@
+package com.commafeed.backend.services;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.List;
+
+import javax.ejb.Stateless;
+import javax.inject.Inject;
+
+import org.apache.commons.lang.ObjectUtils;
+import org.apache.commons.lang.StringUtils;
+
+import com.commafeed.backend.dao.FeedDAO;
+import com.commafeed.backend.dao.FeedEntryDAO;
+import com.commafeed.backend.dao.FeedEntryStatusDAO;
+import com.commafeed.backend.dao.FeedSubscriptionDAO;
+import com.commafeed.backend.model.Feed;
+import com.commafeed.backend.model.FeedEntry;
+import com.commafeed.backend.model.FeedEntryStatus;
+import com.commafeed.backend.model.FeedSubscription;
+import com.google.common.collect.Lists;
+
+@Stateless
+public class FeedUpdateService {
+
+	@Inject
+	FeedDAO feedDAO;
+
+	@Inject
+	FeedSubscriptionDAO feedSubscriptionDAO;
+
+	@Inject
+	FeedEntryDAO feedEntryDAO;
+
+	@Inject
+	FeedEntryStatusDAO feedEntryStatusDAO;
+
+	public void updateEntries(String url, Collection<FeedEntry> entries) {
+		Feed feed = feedDAO.findByUrl(url);
+		List<String> guids = Lists.newArrayList();
+		for (FeedEntry entry : entries) {
+			guids.add(entry.getGuid());
+		}
+
+		List<FeedEntry> existingEntries = guids.isEmpty() ? new ArrayList<FeedEntry>()
+				: feedEntryDAO.findByGuids(guids);
+		for (FeedEntry entry : entries) {
+			FeedEntry foundEntry = null;
+			for (FeedEntry existingEntry : existingEntries) {
+				if (StringUtils
+						.equals(entry.getGuid(), existingEntry.getGuid())) {
+					foundEntry = existingEntry;
+					break;
+				}
+			}
+			if (foundEntry == null) {
+				entry.setInserted(Calendar.getInstance().getTime());
+				addFeedToEntry(entry, feed);
+			} else {
+				boolean foundFeed = false;
+				for (Feed existingFeed : foundEntry.getFeeds()) {
+					if (ObjectUtils.equals(existingFeed.getId(), feed.getId())) {
+						foundFeed = true;
+						break;
+					}
+				}
+
+				if (!foundFeed) {
+					addFeedToEntry(foundEntry, feed);
+				}
+			}
+		}
+	}
+
+	private void addFeedToEntry(FeedEntry entry, Feed feed) {
+		entry.getFeeds().add(feed);
+		feedEntryDAO.saveOrUpdate(entry);
+		List<FeedSubscription> subscriptions = feedSubscriptionDAO
+				.findByFeed(feed);
+		for (FeedSubscription sub : subscriptions) {
+			FeedEntryStatus status = new FeedEntryStatus();
+			status.setEntry(entry);
+			status.setSubscription(sub);
+			feedEntryStatusDAO.save(status);
+		}
+
+	}
+}