package com.commafeed.backend.cache;

import java.util.List;

import org.apache.commons.codec.digest.DigestUtils;

import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedCategory;
import com.commafeed.backend.model.FeedEntry;
import com.commafeed.backend.model.FeedSubscription;
import com.commafeed.backend.model.User;

public abstract class CacheService {

	// feed entries for faster refresh
	public abstract List<String> getLastEntries(Feed feed);

	public abstract void setLastEntries(Feed feed, List<String> entries);

	public String buildUniqueEntryKey(Feed feed, FeedEntry entry) {
		return DigestUtils.sha1Hex(entry.getGuid() + entry.getUrl());
	}

	// user categories
	public abstract List<FeedCategory> getUserCategories(User user);

	public abstract void setUserCategories(User user, List<FeedCategory> categories);

	public abstract void invalidateUserCategories(User user);

	// subscriptions
	public abstract List<FeedSubscription> getUserSubscriptions(User user);

	public abstract void setUserSubscriptions(User user, List<FeedSubscription> subs);

	public abstract void invalidateUserSubscriptions(User user);

	// unread count
	public abstract Long getUnreadCount(FeedSubscription sub);

	public abstract void setUnreadCount(FeedSubscription sub, Long count);

	public abstract void invalidateUnreadCount(FeedSubscription... subs);

}