#!/usr/bin/env python
import sys, os
import cPickle
sys.path.append("~/lib")
import feedparser

class feedster:
	def __init__(self, storage_file):
		self.storage_file = storage_file
		self.feeds = None
		if os.path.exists(storage_file):
			pkl = open(storage_file, 'r')
			self.feeds = cPickle.load(pkl)
			pkl.close()
		else:
			self.feeds = dict()

	def list(self):
		for f in self.feeds:
			yield f

	def load(self,url):
		self.rss = feedparser.parse(feed_url)
		if not self.feeds.has_key(feed_url):
			self.feeds[feed_url] = self.rss

	def get_new(self):
		new = list()
		for r in self.rss['entries']:
			if r not in self.feeds[ feed_url ][ 'entries' ]:
				new.append(r)
		self.feeds[feed_url]['entries'].extend(new)
		return new

	def dump(self):
		if len(self.feeds[feed_url]['entries']) > len(self.rss):
			self.feeds[feed_url]['entries'] = self.feeds[feed_url]['entries'][-1 * len(self.rss) : ]
		pkl = open(self.storage_file, 'w')
		cPickle.dump(self.feeds, pkl)
		pkl.close()
	
if __name__ == '__main__':
	feed_url = sys.argv[1]
	storage = "/home/phaller/.newrss.pkl"
	feeds = feedster(storage)
	if feed_url == "-l":
		for r in feeds.list():
			print r
		sys.exit()
	feeds.load(feed_url)
	for r in feeds.get_new():
		print r.title
	feeds.dump()