Fetch and cache Facebook status from feed

facebook_status.py

import datetime
import feedparser
import bleach
from flask import g, Markup
from kex.app import app

class Status(object):
    
    ALLOWED_TAGS = []
    
    def __init__(self, date, content):
        self.date = date or datetime.datetime.now()
        self.content = content or ''
        
    def to_dict(self):
        return {'date': self.date, 'content': self.content}
    
    def clean(self):
        print self.date
        return dict(
            date=datetime.datetime(*feedparser._parse_date(self.date)[:6]),
            content=Markup(bleach.clean(self.content, tags=self.ALLOWED_TAGS, strip=True))
        )
        

class FacebookFeed(object):
    
    KEY = '%s-fb-status-'
    FEED_URL = 'http://www.facebook.com/feeds/page.php?format=atom10&id=%s'
    EXPIRE = 60 * 15
    
    def __init__(self):
        self.feed_url = self.FEED_URL % app.config['FB_PAGE_ID']
        self.key = self.KEY % app.config['FB_PAGE_ID']
    
    def update(self):
        try:
            feed = feedparser.parse(self.feed_url)
            post = feed['items'][0]
            status = Status(post['updated'], post['content'][0]['value'])
            g.redis.hmset(self.key, status.to_dict())
            g.redis.expire(self.key, self.EXPIRE)
        except IndexError:
            status = Status()
        return status
    
    @property    
    def status(self):
        _status = g.redis.hmget(self.key, ('date', 'content'))
        if not all(_status):
            status = self.update()
        else:
            status = Status(*_status)
        return status.clean()