"""RSS feed aggregator. This module contains no user-facing commands."""

import sys
import os
import threading
import traceback
import feedparser

def on_connected(tenquestionmarks):
	_rss_loop(tenquestionmarks,tenquestionmarks.config()["rss"]["frequency"])

def _rss_loop(tenquestionmarks, frequency=900.0):
	try:
		old_entries_file = os.path.join(tenquestionmarks.directory(),"old-feed-entries")
		FILE = open(old_entries_file, "r")
		filetext = FILE.read()
		FILE.close()
	except IOError:
		filetext = ""
		open(old_entries_file, "w").close()

	filetext = filetext.decode("UTF-8")
	for feed in tenquestionmarks.config()["rss"]["feeds"]:
		feedname = ""
		if isinstance(tenquestionmarks.config()["rss"]["feeds"],dict):
			feedname = feed
			feed = tenquestionmarks.config()["rss"]["feeds"][feed]
		
		NextFeed = False
		tenquestionmarks.log("refresh","Refreshing feed %s" % (feed))
		d = feedparser.parse(feed)
		for entry in d.entries:
			title = entry.title
			try:
				title = title.encode("ascii")
			except UnicodeEncodeError, uee:
				title = tenquestionmarks.degrade_to_ascii(title)
			except UnicodeDecodeError, ude:
				title = tenquestionmarks.degrade_to_ascii(title)				
			if title in filetext:
				tenquestionmarks.log("refresh","Old entry: %s" % (title))
				NextFeed = True
			else:					
				FILE = open(old_entries_file, "a")
				try:
					FILE.write(title + u"\n")
				except Exception, e:
					traceback.print_exc(file=sys.stdout)
					tenquestionmarks.log("Error","%s %s" % (e,title))
				FILE.close()
				tenquestionmarks.queue(tenquestionmarks.config()["rss"]["format"] % ({"title": title, "link": entry.link, "feedname": feedname}))
			if NextFeed:
				break
				
	def refresher(): _rss_loop(tenquestionmarks,frequency)
	t = threading.Timer(frequency, refresher) # TODO: make this static
	t.start()